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argentina audio magnetotelluric: Topics by E-print Network
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argentina audio magnetotelluric First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Inversion of...
Audio-magnetotelluric data collected in the area of Beatty, Nevada
Williams, J.M.
In the summer of 1997, electrical geophysical data was collected north of Beatty, Nevada. Audio-magnetotellurics (AMT) was the geophysical method used to collect 16 stations along two profiles. The purpose of this data collection was to determine the depth to the alluvial basement, based upon the needs of the geologists requesting the data.
Category:Audio-Magnetotellurics | Open Energy Information
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Audio-Magnetotellurics | Open Energy Information
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Contamination Control Techniques
Welcome to a workshop on contamination Control techniques. This work shop is designed for about two hours. Attendee participation is encouraged during the workshop. We will address different topics within contamination control techniques; present processes, products and equipment used here at Hanford and then open the floor to you, the attendees for your input on the topics.
Audio-Magnetotellurics At Baltazor Hot Springs Area (Isherwood...
about the same extent as that indicated on the 7.5 Hz AMT map (Fig. 6b). The resistivity data suggest a reservoir of limited horizontal extent. References W. F. Isherwood, D. R....
Schlumberger soundings, audio-magnetotelluric soundings and telluric
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Audio-Magnetotellurics At Coso Geothermal Area (1977) | Open Energy
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An Audio-Magnetotelluric Investigation In Terceira Island (Azores) | Open
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Heavy Oil Program. Quarterly progress report No. 1, April 1-June 30, 1980
Wayland, J. R.; Bartel, L. C.; Johnson, D. R.; Fox, R. L.
Research and development efforts in support of the DOE Heavy Oil RD and D Program in reservoir access were initiated. Preliminary activities in the survey of sand control, drilling, and fracturing techniques in heavy oil formations are described. The continued development of a high temperature packer for use in steam injection applications is presented. A new application of controlled source audio magnetotelluric survey to developing thermal fronts from in situ combustion and steam drive is described.
Active load control techniques for wind turbines.
van Dam, C.P. (University of California, Davis, CA); Berg, Dale E.; Johnson, Scott J. (University of California, Davis, CA)
This report provides an overview on the current state of wind turbine control and introduces a number of active techniques that could be potentially used for control of wind turbine blades. The focus is on research regarding active flow control (AFC) as it applies to wind turbine performance and loads. The techniques and concepts described here are often described as 'smart structures' or 'smart rotor control'. This field is rapidly growing and there are numerous concepts currently being investigated around the world; some concepts already are focused on the wind energy industry and others are intended for use in other fields, but have the potential for wind turbine control. An AFC system can be broken into three categories: controls and sensors, actuators and devices, and the flow phenomena. This report focuses on the research involved with the actuators and devices and the generated flow phenomena caused by each device.
Tronci, Enrico
AUTOMATIC GENERATION OF OPTIMAL CONTROLLERS THROUGH MODEL CHECKING TECHNIQUES Giuseppe Della Penna Keywords: Controller Synthesis, Controller Optimization, Model Checking, Nonlinear Systems Abstract: We INTRODUCTION Control systems (or, shortly, controllers) are small hardware/software components that control
2D Joint Inversion Of Dc And Scalar Audio-Magnetotelluric Data...
Authors F. A. M. Santos, A. R. A. Afonso and A. Dupis Published Journal Journal of Geophysics and Engineering, 20070101 DOI Not Provided Check for DOI availability: http:...
audio-magnetotelluric station location: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
of Chicago ATLAS HEP, Enrico Fermi Institute 5640 S. Ellis Ave Chicago, IL 60637 October 15, 2007 Abstract A remote monitoring station located at the University of Chicago is...
2D Joint Inversion Of Dc And Scalar Audio-Magnetotelluric Data In The
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Station location map and audio-magnetotelluric data log for Rye Patch known
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Audio-Magnetotellurics At Baltazor Hot Springs Area (Isherwood & Mabey,
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Audio-Magnetotellurics At Chena Area (Erkan, Et. Al., 2008) | Open Energy
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Audio-Magnetotellurics At Raft River Geothermal Area (1978) | Open Energy
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Audio-Magnetotellurics At Chena Geothermal Area (Holdmann, Et Al., 2006) |
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Audio-Magnetotellurics At Roosevelt Hot Springs Geothermal Area (Ward, Et
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Autonomous vehicle control using AI techniques
Keirsey, D.; Mitchell, J.; Bullock, B.; Nussmeier, T.; Tseng, D.
A review of early work on a project for developing autonomous vehicle control technology is presented. The primary goal of this effort is the development of a generic capability that can be specialized to a wide range of DOD applications. Project emphasis is on development of the fundamental AI-based technology required by autonomous systems and the implementation of a testbed environment to evaluate and demonstrate the system capabilities. 10 references.
Technique for megabar controlled strain experiments
Staudhammer, K.P.; Johnson, K.A.
This design allows in one shot one experiment a range of pressures from 12 to 170 GPa and a selectable strain range (0 to 55%) in 304 stainless steel with 100% recovery. Development of the application of griding has enabled correlation, locally, of pressure and strain with structure and properties at a strain rate of 10/sup 6//s. Appropriate variations in momentum trap design can control strain in cylindrical implosion shock experiments. Pedestal type traps have shown significant improvement in the reduction of strain in cylindrical implosion experiments. Such design would seem to be appropriate for experiments on brittle and ceramic materials. In cylindrical designs the degree of macro-strain is a function of trapping and is the result of reflected waves not the primary shock pulse.
An Introduction to Computational Intelligence Techniques for Robot Control
Bullinaria, John
: The application of computational intelligence techniques to the field of industrial robot control is discussed involved, with particular reference to existing applications of these techniques in industrial robotics in real time to update that model. Often, particularly for industrial robots, the model is used off
Techniques in the Control of Interconnected Plants Morten Hovd \\Lambda
Skogestad, Sigurd
Techniques in the Control of Interconnected Plants Morten Hovd \\Lambda Fantoft Prosess Teknostallen. This is caused by tighter integration of heat and mass in modern chemical plants, and the decreased volumes (or throughout a modern chemical plant than in older plants. This puts greater demands on the control system
Engine control techniques to account for fuel effects
Kumar, Shankar; Frazier, Timothy R.; Stanton, Donald W.; Xu, Yi; Bunting, Bruce G.; Wolf, Leslie R.
A technique for engine control to account for fuel effects including providing an internal combustion engine and a controller to regulate operation thereof, the engine being operable to combust a fuel to produce an exhaust gas; establishing a plurality of fuel property inputs; establishing a plurality of engine performance inputs; generating engine control information as a function of the fuel property inputs and the engine performance inputs; and accessing the engine control information with the controller to regulate at least one engine operating parameter.
Microfluidic advantage : novel techniques for protein folding and oxygen control in cell cultures
Polinkovsky, Mark E.; Polinkovsky, Mark E.
Novel Techniques for Protein Folding and Oxygen Control inTemperature Jump System to Study Fast Protein FoldingNovel Techniques for Protein Folding and Oxygen Control in
Introduction to Commercial Building Control Strategies and Techniques for Demand Response -- Appendices
Motegi, N.
for Demand Response in New and Existing Commercial BuildingsBuilding Control Strategies and Techniques for Demand Response -Building Control Strategies and Techniques for Demand Response
Techniques in the Control of Interconnected Plants Morten Hovd
Skogestad, Sigurd
Techniques in the Control of Interconnected Plants Morten Hovd Fantoft Prosess Teknostallen N-7030 in modern chemical plants, and the decreased volumes or removal of bu er tanks between processing steps. Thus, disturbances will spread more rapidly and widely throughout a modern chemical plant than in older
Abstract--Robust control has long been the purview of quanti-tative linear control techniques, while qualitative, symbolic
Linder, Stephen
Abstract--Robust control has long been the purview of quanti- tative linear control techniques, while qualitative, symbolic control has been deemed more suitable to obtaining complex control objectives that require only low output precision. The intelligent techniques of Fuzzy control have, however
Positron plasma control techniques for the production of cold antihydrogen
Funakoshi, R.; Hayano, R. S. [Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan); Amoretti, M.; Macri, M.; Testera, G.; Variola, A. [Istituto Nazionale di Fisica Nucleare, Sezione di Genova, 16146 Genova (Italy); Bonomi, G. [Dipartimento di Ingegneria Meccanica, Universita di Brescia, 25123 Brescia (Italy); Dipartimento di Fisica Nucleare e Teorica, Universita di Pavia, 27100 Pavia (Italy); Bowe, P. D.; Hangst, J. S.; Madsen, N. [Department of Physics and Astronomy, University of Aarhus, 8000 Aarhus C (Denmark); Canali, C.; Carraro, C.; Lagomarsino, V.; Manuzio, G. [Istituto Nazionale di Fisica Nucleare, Sezione di Genova, 16146 Genova (Italy); Dipartimento di Fisica, Universita di Genova, 16146 Genova (Italy); Cesar, C. L. [Instituto de Fisica, Universidade do Brasil, Cx Postal 68528, Rio de Janeiro 21941-972 (Brazil); Charlton, M.; Joergensen, L. V.; Mitchard, D.; Werf, D. P. van der [Department of Physics, University of Wales Swansea, Swansea SA2 8PP (United Kingdom); Doser, M. [PH Department, CERN, 1211 Geneva 23 (Switzerland)] (and others)
An observation of a clear dependence of antihydrogen production on positron plasma shapes is reported. For this purpose a plasma control method has been developed combining the plasma rotating-wall technique with a mode diagnostic system. With the help of real-time and nondestructive observations, the rotating-wall parameters have been optimized. The positron plasma can be manipulated into a wide range of shapes (aspect ratio 6.5{<=}{alpha} < or approx. 80) and densities (1.5x10{sup 8}{<=}n < or approx. 7x10{sup 9} cm{sup -3}) within a short duration (25 s) compatible with the ATHENA antihydrogen production cycle.
Intelligent Control Techniques for Efficient Regulation of ABR Queue Length in ATM Switches
Pitsillides, Andreas
Intelligent Control Techniques for Efficient Regulation of ABR Queue Length in ATM Switches Y Nicosia, Cyprus email@example.com Abstract Designing effective congestion control strategies, in this paper, we present a regulator based on Fuzzy Logic control techniques for controlling congestion
Enfors, Sven-Olof
from 18 to 37 �C. A dynamic simulation model of the TLFB technique was developed and the results wereTHE TEMPERATURE-LIMITED FED-BATCH TECHNIQUE FOR CONTROL OF ESCHERICHIA COLI CULTURES MARIE SVENSSON with emphasis on the temperature-limited fed-batch (TLFB) culture. The TLFB technique controls the oxygen
advanced control techniques: Topics by E-print Network
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30 Rabbit: a testbed for advanced control theory CiteSeer Summary: RABBIT is a bipedal robot specifically designed to advance the fundamental understanding of controlled legged...
CONTROL ID: 1469463 TITLE: In Situ Techniques for Mineralogy and Geochemistry of Small Bodies
Rossman. George R.
CONTROL ID: 1469463 TITLE: In Situ Techniques for Mineralogy and Geochemistry of Small Bodies information about their formation histories and evolution. Combined geochemistry and mineralogy measurements measurement techniques that could provide microscopic mineralogy and isotope geochemistry. We will discuss
Method for determining depth and shape of a sub-surface conductive object
Lee, D.O.; Montoya, P.C.; Wayland, Jr.
The depth to and size of an underground object may be determined by sweeping a controlled source audio magnetotelluric (CSAMT) signal and locating a peak response when the receiver spans the edge of the object. The depth of the object is one quarter wavelength in the subsurface media of the frequency of the peak. 3 figures.
activity control technique: Topics by E-print Network
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Optimal Control control study. The case study treated in the paper deals with a turbocharger power assist system (TPAS). The extent to which this system can reduce the diesel...
Abstract--The robust precision dynamic control output of pneumatic systems requires model-based control techniques
Barth, Eric J.
of pressure whose value is to be estimated. In the second method, sliding-mode pressure observer design-based control techniques such as sliding mode and adaptive control. These controllers require full state knowledge of the system, viz. pressure, position, and velocity. For measuring two of the states, pneumatic
Force controlled manipulation is a common technique for compli antly contacting and manipulating uncertain environments. Visual
Abstract Force controlled manipulation is a common technique for compli� antly contacting guide a manipulator simplifies the force control problem by allowing the effective use of low gain force force sensor and a stiff manipulator position control loop. Because the force sensor measures all forces
Optimal Lyapunov quantum control on two-level systems: convergence and extended techniques
L. C. Wang; S. C. Hou; X. X. Yi; Daoyi Dong; Ian R. Petersen
Taking a two-level system as an example, we show that a strong control field may enhance the efficiency of optimal Lyapunov quantum control in [Hou et al., Phys. Rev. A \\textbf{86}, 022321 (2012)] but could decrease its control fidelity. A relationship between the strength of the control field and the control fidelity is established. An extended technique, which combines free evolution and external control, is proposed to improve the control fidelity. We analytically demonstrate that the extended technique can be used to design a control law for steering a two-level system exactly to the target state. In such a way, the convergence of the extended optimal Lyapunov quantum control can be guaranteed.
Process control techniques for the Sidmar blast furnaces
Vandenberghe, D.; Bonte, L.; Nieuwerburgh, H. van [Sidmar N.V., Ghent (Belgium)
The major challenge for modern blast furnace operation is the achievement of a very high productivity, excellent hot metal quality, low fuel consumption and longer blast furnace campaigns. The introduction of predictive models, decision supporting software and expert systems has reduced the standard deviation of the hot metal silicon content. The production loss due to the thermal state of the blast furnace has decreased three times since 1990. An appropriate control of the heat losses with high pulverized coal injection rates, is of the utmost importance for the life of the blast furnace. Different rules for the burden distribution of both blast furnaces are given. At blast furnace A, a peripheral gas flow is promoted, while at blast furnace B a more central gas flow is promoted.
Application of variational techniques for parametric studies of steady-state controlled thermonuclear reactor blankets�
Pearce, James David
APPLICATION OF VARIATIONAL TECHNIQUES FOR PARAMETRIC STUDIES OF STEADY-STATE CONTROLLED THERMONUCLEAR REACTOR BLANKETS A Thesis JAMES DAVID PEARCE Submitted to the Graduate College of Texas A6M University in partial fulfillment... of the requirement for the degree of MASTER OP SCIENCE May 1975 Ma)or Subject: Nuclear Engineering APPLICATION OF VARIATIONAL TECHNIQUES FOR PARAMETRIC STUDIES OF STEADY-STATE CONTROLLED THERMONUCLEAR REACTOR BLANKETS A Thesis by JAMES DAVID PEARCE Approved...
Application of variational techniques for parametric studies of steady-state controlled thermonuclear reactor blankets
Pearce, James David
APPLICATION OF VARIATIONAL TECHNIQUES FOR PARAMETRIC STUDIES OF STEADY-STATE CONTROLLED THERMONUCLEAR REACTOR BLANKETS A Thesis JAMES DAVID PEARCE Submitted to the Graduate College of Texas A6M University in partial fulfillment... of the requirement for the degree of MASTER OP SCIENCE May 1975 Ma)or Subject: Nuclear Engineering APPLICATION OF VARIATIONAL TECHNIQUES FOR PARAMETRIC STUDIES OF STEADY-STATE CONTROLLED THERMONUCLEAR REACTOR BLANKETS A Thesis by JAMES DAVID PEARCE Approved...
Adaptive Filter Techniques for Optical Beam Jitter Control Michael J. Beerer+
Adaptive Filter Techniques for Optical Beam Jitter Control Michael J. Beerer+ , Hyungjoo Yoon beam jitter using a fast-steering mirror. Adaptive filter controllers using Filtered-X least mean jitter include mechanical vibrations on the optical platform (narrowband) and atmospheric turbulence
Extremum seeking control techniques applied to photovoltaic systems with multimodal power curves
Boyer, Edmond
Extremum seeking control techniques applied to photovoltaic systems with multimodal power curves systems while the energy consumption is also increasing [1], [2]. Among such systems, the photovoltaic (PV algorithms are proposed for such systems in order to harvest maximum power: short- circuit photovoltaic
Application of an exact model matching technique to coupled-core nuclear reactor control
Tzafestas, S.G.; Chrysochoides, N.G.; Rokkos, K.
In this Note the control problem of linearized coupled-core multivariable nuclear reactors is treated by using a recent exact model matching technique in the frequency domain. The case of state feedback control is first considered and then the results are used where only the output variables of the reactor are available for feedback. A numerical example of a three coupled-core nuclear reactor model with one delayed neutron group for each core and short neutron travel time between cores is included.
On large-scale nonlinear programming techniques for solving optimal control problems
Faco, J.L.D.
The formulation of decision problems by Optimal Control Theory allows the consideration of their dynamic structure and parameters estimation. This paper deals with techniques for choosing directions in the iterative solution of discrete-time optimal control problems. A unified formulation incorporates nonlinear performance criteria and dynamic equations, time delays, bounded state and control variables, free planning horizon and variable initial state vector. In general they are characterized by a large number of variables, mostly when arising from discretization of continuous-time optimal control or calculus of variations problems. In a GRG context the staircase structure of the jacobian matrix of the dynamic equations is exploited in the choice of basic and super basic variables and when changes of basis occur along the process. The search directions of the bound constrained nonlinear programming problem in the reduced space of the super basic variables are computed by large-scale NLP techniques. A modified Polak-Ribiere conjugate gradient method and a limited storage quasi-Newton BFGS method are analyzed and modifications to deal with the bounds on the variables are suggested based on projected gradient devices with specific linesearches. Some practical models are presented for electric generation planning and fishery management, and the application of the code GRECO - Gradient REduit pour la Commande Optimale - is discussed.
Development and application of new techniques for blast furnace process control at SSAB Tunnplaat, Luleaa Works
Braemming, M.; Hallin, M. [SSAB Tunnplaat AB, Luleaa (Sweden); Zuo, G. [Luleaa Univ. (Sweden). Dept. of Process Metallurgy
SSAB Tunnplaat AB operates two blast furnaces (M1 and M2) in Luleaa. In recent years research efforts have to a great extent been aimed at the development of new techniques for blast furnace process control. An example is the installation of a burden profile measurement system, which was useful in the development of a new burden distribution praxis on the big furnace (M2), equipped with a bell-less-top. Hearth level detection and continuous measurement of the hot metal temperature in the runner are under evaluation. The purpose of these techniques is to give earlier information concerning the state of the blast furnace process. Parallel to this work, models for prediction of silicon in hot metal, the position and shape of the cohesive zone and slip-warning are being developed and tested off-line. These new models and information from new measuring techniques will be integrated into a new Operating Guidance System, hopefully resulting in a powerful tool in the efforts to stabilize blast furnace operations.
Quantification of UV-Visible and Laser Spectroscopic Techniques for Materials Accountability and Process Control
Czerwinski, Kenneth
Ultraviolet�visible spectroscopy (UV�Visible) and time-resolved laser fluorescence spectroscopy (TRLFS) optical techniques can permit on-line analysis of actinide elements in a solvent extraction process in real time. These techniques have been used for measuring actinide speciation and concentration under laboratory conditions and are easily adaptable to multiple sampling geometries, such as dip probes, fiber-optic sample cells, and flow-through cell geometries. To fully exploit these techniques, researchers must determine the fundamental speciation of target actinides and the resulting influence on spectroscopic properties. Detection limits, process conditions, and speciation of key actinide components can be established and utilized in a range of areas, particularly those related to materials accountability and process control. Through this project, researchers will develop tools and spectroscopic techniques to evaluate solution extraction conditions and concentrations of U, Pu, and Cm in extraction processes, addressing areas of process control and materials accountability. The team will evaluate UV� Visible and TRLFS for use in solvent extraction-based separations. Ongoing research is examining efficacy of UV-Visible spectroscopy to evaluate uranium and plutonium speciation under conditions found in the UREX process and using TRLFS to evaluate Cm speciation and concentration in the TALSPEAK process. A uranyl and plutonium nitrate UV�Visible spectroscopy study met with success, which supports the utility and continued exploration of spectroscopic methods for evaluation of actinide concentrations and solution conditions for other aspects of the UREX+ solvent extraction scheme. This project will ex examine U and Pu absorbance in TRUEX and TALSPEAK, perform detailed examination of Cm in TRUEX and TALSPEAK, study U laser fluorescence, and apply project data to contactors. The team will also determine peak ratios as a function of solution concentrations for the UV-Visible spectroscopy studies. The use of TRLFS to examine Cm and U will provide data to evaluate lifetime, peak location, and peak ratios (mainly for U). The bases for the spectroscopic techniques have been investigated, providing fundamental evidence for the application�s utility.
Process control techniques at the blast furnaces of Thyssen Stahl AG
Kowalski, W.; Bachhofen, H.J.; Beppler, E.; Kreibich, K.; Muelheims, K.; Peters, M.; Wieters, C.U. [Thyssen Stahl AG, Duisburg (Germany)
Process improvements, capacity increases and the use of modern measuring and process control techniques have helped to ensure that the blast furnace will remain an indispensable means of supplying steelworks with hot metal until well into the next century. The survival of a future-oriented company such as Thyssen Stahl AG depends on long-term improvements in economic viability. Today, Thyssen Stahl AG operates two blast furnace plants comprising a total of five blast furnaces with hearth diameters ranging from 9.3 to 14.9m. This choice of furnaces permits flexible adjustment to changing workload situations and enables about ten million tons of hot metal to be produced each year. The wide range of measuring devices specially fitted on Schwelgern blast furnace No. 1 made a vital contribution to the development of blast furnace models. The purpose of these models was to make a general assessment of the state of the furnace and so create an objective basis for furnace operation. The paper describes the development of these measuring techniques and process model and the application of the model.
Techniques for solving Nonlinear Programming Problems with Emphasis on Interior Point Methods and Optimal Control Problems�
Buchanan, Catherine
The primary focus of this work is a thorough research into the current available techniques for solving nonlinear programming problems. Emphasis is placed on interior-point methods and the connection between optimal ...
Microfluidic advantage : novel techniques for protein folding and oxygen control in cell cultures
Polinkovsky, Mark E.; Polinkovsky, Mark E.
686. H. Bruus. Theoretical Microfluidics. New York: Oxford28 Chapter 2: Microfluidics for Controlling the Gas Contentand expertise in microfluidics, materials, and biochemistry
Development and Quantification of UV-Visible and Laser Spectroscopic Techniques for Materials Accountability and Process Control
Ken Czerwinski; Phil Weck; Frederic Poineau
Ultraviolet-Visible Spectroscopy (UV-Visible) and Time Resolved Laser Fluorescence Spectroscopy (TRLFS) optical techniques can permit on-line, real-time analysis of the actinide elements in a solvent extraction process. UV-Visible and TRLFS techniques have been used for measuring the speciation and concentration of the actinides under laboratory conditions. These methods are easily adaptable to multiple sampling geometries, such as dip probes, fiber-optic sample cells, and flow-through cell geometries. To fully exploit these techniques for GNEP applications, the fundamental speciation of the target actinides and the resulting influence on 3 spectroscopic properties must be determined. Through this effort detection limits, process conditions, and speciation of key actinide components can be establish and utilized in a range of areas of interest to GNEP, especially in areas related to materials accountability and process control.
Flow control techniques for real-time media applications in best-effort networks using fluid models
Konstantinou, Apostolos
at the application layer. An end-to-end ?uid model is used, including the source bu?er, the network and the destination bu?er. Traditional con- trol techniques, along with more advanced adaptive predictive control methods, are considered in order to provide... OF THE END-TO-END FLOW TRANSPORT SYSTEM : : : : : : : : : : : : : : : : : : : : : : 25 A. Source Bu?er Model . . . . . . . . . . . . . . . . . . . . . 25 B. Network Dynamic Model . . . . . . . . . . . . . . . . . . . 27 1. Time-Varying Time Delay Model...
A mathematical model of probability of conception in humans, and an analysis of the rhythm technique of birth control�
Nordheim, Alan Walter
Studies of Rhythm Effectiveness . . 59 DISCUSSION 68 Proposed Rhythm Method Analysis of the Rhythm Technique of Birth Control Suggestions for Future Studies 68 68 72 CONCLUSIONS REFERENCES 75 77 VITA 80 LIST OF TABLES TABLE 1. Mean (r.... Mean (r), standard deviation (o ), coef ficient of varia- tion (v), and comparison of inverse normal (f ) and N inverse quadratic (f ) probability density functions Q against observed distributions of luteal intervals (Matsumoto et al. , 1962) 27...
Comparison of optimization techniques for origin-destination seat inventory control
Williamson, Elizabeth Louise
Airlines have recently realized the importance of an effective seat inventory control system on revenues and profits. Yet, at the same time, there is a lack of practical optimization models for determining the number of ...
Current techniques in acid-chloride corrosion control and monitoring at The Geysers
Hirtz, Paul; Buck, Cliff; Kunzman, Russell
Acid chloride corrosion of geothermal well casings, production piping and power plant equipment has resulted in costly corrosion damage, frequent curtailments of power plants and the permanent shut-in of wells in certain areas of The Geysers. Techniques have been developed to mitigate these corrosion problems, allowing continued production of steam from high chloride wells with minimal impact on production and power generation facilities.The optimization of water and caustic steam scrubbing, steam/liquid separation and process fluid chemistry has led to effective and reliable corrosion mitigation systems currently in routine use at The Geysers. When properly operated, these systems can yield steam purities equal to or greater than those encountered in areas of The Geysers where chloride corrosion is not a problem. Developments in corrosion monitoring techniques, steam sampling and analytical methodologies for trace impurities, and computer modeling of the fluid chemistry has been instrumental in the success of this technology.
Comparison between block and computer controlled techniques of scheduling for a job shop
Garrison, William Ray
. 244 . 253 . 277 ?277 487 488 490 489 7084 7076 7084 7084 5&8 6, 0 5 8 43, 7 43. 5 43, 6 43, 6 COMPARISON OF SCHEDULINGTECHNIQUES COMPUTER CONTROLLED SCHEDULE VS. BLOCK TYPE SCHEDULE DA I A SET I I TOTAL NUMBER OF JOBS TO FNTKR... JOBS LEAVING S YSTEM 8P / SYSTEM CAPACITY 150 Z C IOO O O W 50 COMPUTER CONTROLLED . ' / BLOCK TYPE . ~~L I A~1 IOO 80 60 40 EARLY 20 0 20 TIME UNITS 40 60 80 100 L ATE JOBS LEAVING SYSTEM 96 /o SYSTEM CAPACITY 150 Z IO0 m O...
Development and Control of Autonomous, Biped Locomotion using Efficient Modeling, Simulation, and Optimization Techniques
Stryk, Oskar von
of joint reference trajectories for implementing first steps, the development of nonlinear dynamics model-basedDevelopment and Control of Autonomous, Biped Locomotion using Efficient Modeling, Simulation from simulations and gait optimizations completed during its development using a 3D dynamic biped model
Input Power Measurement Techniques for Single-Phase Digitally Controlled PFC Rectifiers
resulting in accurate input power measurements are outlined. 1. INTRODUCTION Time-of-use marketing are required for both "time-of-use" billing and system power management purposes. When a digitally controlled. Experimental results comparing and contrasting the perfor- mance of the power measurement architectures
A Survey of Techniques Used to Control Microgrid Generation and Storage during Island Operation
Michael Angelo Pedrasa
A microgrid is a cluster of interconnected distributed generators, loads and intermediate storage units that cooperate with each other to be collectively treated by the grid as a controllable load or generator. Power quality events and pre-set conditions will make the microgrid disconnect from the
Evaluation of a Stastical Technique to Mitigate Malicious Control Packets in Ad Hoc Networks
Boppana, Rajendra V.
traffic over TCP, we show that the rate control mechanism is very effective in detecting and mitigating. Intrusion detection systems [22] address DoS as part of a variety of other security attacks can be launched by malicious nodes without generating unusually high traffic. This makes the detection
Site control technique for quantum dots using electron beam induced deposition
Iizuka, Kanji; Jung, JaeHun; Yokota, Hiroshi [Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro, Minami-saitama, Saitama 3458501 (Japan)
To develop simple and high throughput sit definition technique for quantum dots (QDs), the electron beam induced deposition (EBID) method was used as desorption guide of phosphorus atoms form InP substrate. As the results one or a few indium (In) droplets (DLs) were created in the carbon grid pattern by thermal annealing at a temperature of 450�C for 10 min in the ultra high vacuum condition. The size of In DLs was larger than QDs, but arsenide DLs by molecular beam in growth chamber emitted wavelength of 1.028?m at 50K by photoluminescence measurement.
A technique to control mercury from flue gas: The Thief Process
O'Dowd, W.J.; Pennline, H.W.; Freeman, M.C.; Granite, E.J.; Hargis, R.A.; Lacher, C.J.; Karash, A.
The Thief Process is a mercury removal process that may be applicable to a broad range of pulverized coal-fired combustion systems. This is one of several sorbent injection technologies under development by the U.S. Department of Energy for capturing mercury from coal-fired electric utility boilers. A unique feature of the Thief Process involves the production of a thermally activated sorbent in situ at the power plant. The sorbent is obtained by inserting a lance, or thief, into the combustor, in or near the flame, and extracting a mixture of partially combusted coal and gas. The partially combusted coal or sorbent has adsorptive properties suitable for the removal of vapor-phase mercury at flue gas temperatures that are typical downstream of a power plant preheater. One proposed scenario, similar to activated carbon injection (ACI), involves injecting the extracted sorbent into the downstream ductwork between the air preheater and the particulate collection device of the power plant. Initial laboratory-scale and pilot-scale testing, using an eastern bituminous coal, focused on the concept validation. Subsequent pilot-scale testing, using a Powder River Basin (PRB) coal, focused on the process development and optimization. The results of the experimental studies, as well as an independent experimental assessment, are detailed. In addition, the results of a preliminary economic analysis that documents the costs and the potential economic advantages of the Thief Process for mercury control are discussed.
High-speed spiral imaging technique for an atomic force microscope using a linear quadratic Gaussian controller
Habibullah, H., E-mail: email@example.com; Pota, H. R., E-mail: email@example.com; Petersen, I. R., E-mail: firstname.lastname@example.com [School of Engineering and Information Technology, University of New South Wales, Canberra, Australian Capital Territory 2612 (Australia)
This paper demonstrates a high-speed spiral imaging technique for an atomic force microscope (AFM). As an alternative to traditional raster scanning, an approach of gradient pulsing using a spiral line is implemented and spirals are generated by applying single-frequency cosine and sine waves of slowly varying amplitudes to the X and Y-axes of the AFM�s piezoelectric tube scanner (PTS). Due to these single-frequency sinusoidal input signals, the scanning process can be faster than that of conventional raster scanning. A linear quadratic Gaussian controller is designed to track the reference sinusoid and a vibration compensator is combined to damp the resonant mode of the PTS. An internal model of the reference sinusoidal signal is included in the plant model and an integrator for the system error is introduced in the proposed control scheme. As a result, the phase error between the input and output sinusoids from the X and Y-PTSs is reduced. The spirals produced have particularly narrow-band frequency measures which change slowly over time, thereby making it possible for the scanner to achieve improved tracking and continuous high-speed scanning rather than being restricted to the back and forth motion of raster scanning. As part of the post-processing of the experimental data, a fifth-order Butterworth filter is used to filter noises in the signals emanating from the position sensors and a Gaussian image filter is used to filter the images. A comparison of images scanned using the proposed controller (spiral) and the AFM PI controller (raster) shows improvement in the scanning rate using the proposed method.
6. CONCLUSIONS AND FUTURE WORK The initial goal of this thesis was to provide a general technique for the control of complex,
Toronto, University of
96 6. CONCLUSIONS AND FUTURE WORK The initial goal of this thesis was to provide a general contribution of this thesis is to illustrate that control techniques can be successfully applied to animate this cost. Both are based on the reuse of previously computed models rather than blind reconstruction
Chen, Gang; Lin, Yuehe
Sensitive and selective detection techniques are of crucial importance for capillary electrophoresis (CE), microfluidic chips, and other microfluidic systems. Electrochemical detectors have attracted considerable interest for microfluidic systems with features that include high sensitivity, inherent miniaturization of both the detection and control instrumentation, low cost and power demands, and high compatibility with microfabrication technology. The commonly used electrochemical detectors can be classified into three general modes: conductimetry, potentiometry, and amperometry.
Novel Technique of Contact Force Vector Determination Aimed at Control of Service Robot Arm and Estimation of Environment Stiffness
Tachi, Susumu
of the applied force vector at any point of the robot arm and its technical realization. The experimental results. Keywords: Sensitive robot arm, robot-environment interaction, contact transition control. 1. INTRODUCTION-speed vision system attached to the robot arm allows real-time collision avoidance [2]. However, even
Multiphase soft switched DC/DC converter and active control technique for fuel cell ripple current elimination
Lai, Jih-Sheng (Blacksburg, VA); Liu, Changrong (Sunnyvale, CA); Ridenour, Amy (Salem, VA)
DC/DC converter has a transformer having primary coils connected to an input side and secondary coils connected to an output side. Each primary coil connects a full-bridge circuit comprising two switches on two legs, the primary coil being connected between the switches on each leg, each full-bridge circuit being connected in parallel wherein each leg is disposed parallel to one another, and the secondary coils connected to a rectifying circuit. An outer loop control circuit that reduces ripple in a voltage reference has a first resistor connected in series with a second resistor connected in series with a first capacitor which are connected in parallel with a second capacitor. An inner loop control circuit that reduces ripple in a current reference has a third resistor connected in series with a fourth resistor connected in series with a third capacitor which are connected in parallel with a fourth capacitor.
A shallow subsurface controlled release facility in Bozeman, Montana, USA, for testing near surface CO2 detection techniques and transport models
Spangler, L.H.; Dobeck, L.M.; Nehrir, A.; Humphries, S.; Barr, J.; Keith, C.; Shaw, J.; Rouse, J.; Cunningham, A.; Benson, S.; Repasky, K.S.; Lewicki, J.; Wells, A.; Diehl, R.; Strazisar, B.; Fessenden, J.; Rahn, T.; Amonette, J.; Barr, J.; Pickles, W.; Jacobson, J.; Silver, E.; Male, E.; Rauch, H.; Gullickson, K.; Trautz, R.; Kharaka, Y.; Birkholzer, J.T.; Wielopolski, L.; Oldenburg, C.M.
A controlled field pilot has been developed in Bozeman, Montana, USA, to study near surface CO2 transport and detection technologies. A slotted horizontal well divided into six zones was installed in the shallow subsurface. The scale and CO2 release rates were chosen to be relevant to developing monitoring strategies for geological carbon storage. The field site was characterized before injection, and CO2 transport and concentrations in saturated soil and the vadose zone were modeled. Controlled releases of CO2 from the horizontal well were performed in the summers of 2007 and 2008, and collaborators from six national labs, three universities, and the U.S. Geological Survey investigated movement of CO2 through the soil, water, plants, and air with a wide range of near surface detection techniques. An overview of these results will be presented.
A shallow subsurface controlled release facility in Bozeman, Montana, USA, for testing near surface CO2 detection techniques and transport models
Spangler, Lee H.; Dobeck, Laura M.; Repasky, Kevin S.; Nehrir, Amin R.; Humphries, Seth D.; Barr, Jamie L.; Keith, Charlie J.; Shaw, Joseph A.; Rouse, Joshua H.; Cunningham, Alfred B.; Benson, Sally M.; Oldenburg, Curtis M.; Lewicki, Jennifer L.; Wells, Arthur W.; Diehl, J. R.; Strazisar, Brian; Fessenden, Julianna; Rahn, Thom A.; Amonette, James E.; Barr, Jonathan L.; Pickles, William L.; Jacobson, James D.; Silver, Eli A.; Male, Erin J.; Rauch, Henry W.; Gullickson, Kadie; Trautz, Robert; Kharaka, Yousif; Birkholzer, Jens; Wielopolski, Lucien
A facility has been constructed to perform controlled shallow releases of CO2 at flow rates that challenge near surface detection techniques and can be scalable to desired retention rates of large scale CO2 storage projects. Preinjection measurements were made to determine background conditions and characterize natural variability at the site. Modeling of CO2 transport and concentration in saturated soil and the vadose zone was also performed to inform decisions about CO2 release rates and sampling strategies. Four releases of CO2 were carried out over the summer field seasons of 2007 and 2008. Transport of CO2 through soil, water, plants, and air was studied using near surface detection techniques. Soil CO2 flux, soil gas concentration, total carbon in soil, water chemistry, plant health, net CO2 flux, atmospheric CO2 concentration, movement of tracers, and stable isotope ratios were among the quantities measured. Even at relatively low fluxes, most techniques were able to detect elevated levels of CO2 in the soil, atmosphere, or water. Plant stress induced by CO2 was detectable above natural seasonal variations.
An indirect sensing technique for diesel fuel quantity control. Technical progress report, October 1--December 31, 1998
MacCarley, C.A.
Work has proceeded intensely with the objective of completing the commercial prototype system prior to the end of the contract period. At the time of this report, testing and refinement of the commercial version of the system has not been completed. During this reporting period, several major milestones were reached and many significant lessons were learned. These are described. The experimental retrofit system has achieved all performance objectives in engine dynamometer tests. The prototype commercial version of the system will begin demonstration service on the first of several Santa Maria Area Transit (SMAT) transit buses on February 1, 1999. The commercial system has been redesignated the Electronic Diesel Smoke Reduction System (EDSRS) replacing the original internal pseudonym ADSC. The focus has been narrowed to a retrofit product suitable for installation on existing mechanically-governed diesel engines. Included in this potential market are almost all diesel-powered passenger cars and light trucks manufactured prior to the introduction of the most recent clean diesel engines equipped with particulate traps and electronic controls. Also included are heavy-duty trucks, transit vehicles, school buses, and agricultural equipment. This system is intended to prevent existing diesel engines from overfueling to the point of visible particulate emissions (smoke), while allowing maximum smoke-limited torque under all operating conditions. The system employs a microcontroller and a specialized exhaust particulate emission sensor to regulate the maximum allowable fuel quantity via an adaptive throttle-limit map. This map specifies a maximum allowable throttle position as a function of engine speed, turbocharger boost pressure and engine coolant temperature. The throttle position limit is mechanized via a servo actuator inserted in the throttle cable leading to the injection pump.
Cerro Prieto geothermal field: exploration during exploitation
Not Available
Geological investigations at Momotombo included photogeology, field mapping, binocular microscope examination of cuttings, and drillhole correlations. Among the geophysical techniques used to investigate the field sub-structure were: Schlumberger and electromagnetic soundings, dipole mapping and audio-magnetotelluric surveys, gravity and magnetic measurements, frequency domain soundings, self-potential surveys, and subsurface temperature determinations. The geochemical program analyzed the thermal fluids of the surface and in the wells. The description and results of exploration methods used during the investigative stages of the Momotombo Geothermal Field are presented. A conceptual model of the geothermal field was drawn from the information available at each exploration phase. The exploration methods have been evaluated with respect to their contributions to the understanding of the field and their utilization in planning further development.
artificial intelligence techniques: Topics by E-print Network
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vs. "Conventional Control" Intelligent Control: Basic Techniques 164 Alan Turing and the development of Artificial Intelligence Computer Technologies and...
Exploration of the El Hoyo-Monte Galan Geothermal Concession. Final report
In January 1996 Trans-Pacific Geothermal Corporation (TGC) was granted a geothermal concession of 114 square kilometers from the Instituto Nicaragueense de Energie (INE) for the purpose of developing between 50 and 150 MWe of geothermal electrical generating capacity. The Concession Agreement required TGC to perform geological, geophysical, and geochemical studies as part of the development program. TGC commenced the geotechnical studies in January 1996 with a comprehensive review of all existing data and surveys. Based on this review, TGC formulated an exploration plan and executed that plan commencing in April, 1996. The ground magnetic (GM), self potential (SP), magnetotelluric/controlled source audio magnetotelluric (MT/CSAMT) and one-meter temperature surveys, data integration, and synthesis of a hydrogeologic model were performed. The purpose of this report is to present a compilation of all data gathered from the geophysical exploration program and to provide an integrated interpretation of that data.
Intelligent fuzzy supervisory control for distillation columns
Santhanam, Srinivasan
problem. Multivariable design techniques are used to control the column. Some of the different multivariable techniques which have been used in the distillation column control include decoupling control, optimal control and internal model control [5...
ac impedance techniques: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
used to describe the nuclear control system. The approach is based on the existing AECL approach that was the only formal specification technique applied to nuclear control...
analyzers evaluation technique: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
used to describe the nuclear control system. The approach is based on the existing AECL approach that was the only formal specification technique applied to nuclear control...
Optimal control of controllable switched systems
Rinehart, Michael David
Many of the existing techniques for controlling switched systems either require the solution to a complex optimization problem or significant sacrifices to either stability or performance to offer practical controllers. ...
Waggoner, L.O.
The presentation focuses on some of the time-proven and new technologies being used to accomplish radiological work. These techniques can be applied at nuclear facilities to reduce radiation doses and protect the environment. The last reactor plants and processing facilities were shutdown and Hanford was given a new mission to put the facilities in a safe condition, decontaminate, and prepare them for decommissioning. The skills that were necessary to operate these facilities were different than the skills needed today to clean up Hanford. Workers were not familiar with many of the tools, equipment, and materials needed to accomplish:the new mission, which includes clean up of contaminated areas in and around all the facilities, recovery of reactor fuel from spent fuel pools, and the removal of millions of gallons of highly radioactive waste from 177 underground tanks. In addition, this work has to be done with a reduced number of workers and a smaller budget. At Hanford, facilities contain a myriad of radioactive isotopes that are 2048 located inside plant systems, underground tanks, and the soil. As cleanup work at Hanford began, it became obvious early that in order to get workers to apply ALARA and use hew tools and equipment to accomplish the radiological work it was necessary to plan the work in advance and get radiological control and/or ALARA committee personnel involved early in the planning process. Emphasis was placed on applying,ALARA techniques to reduce dose, limit contamination spread and minimize the amount of radioactive waste generated. Progress on the cleanup has,b6en steady and Hanford workers have learned to use different types of engineered controls and ALARA techniques to perform radiological work. The purpose of this presentation is to share the lessons learned on how Hanford is accomplishing radiological work.
Optimal control techniques for reachable set computations
Boyer, Edmond
;Safety by Driver Assistance Systems Passive safety systems: chassis, airbags, seat belts, seat belt
Active Load Control Techniques for Wind Turbines
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProducts (VAP) VAP7-0973 1 IntroductionActinide Chemistry Turbines *Active809
Active Load Control Techniques for Wind Turbines
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProducts (VAP) VAP7-0973 1 IntroductionActinide Chemistry Turbines
Slatton, Clint
1 LOCAL LINEAR PID CONTROLLERS FOR NONLINEAR CONTROL Jing Lan1, Jeongho Cho1, Deniz Erdogmus2, firstname.lastname@example.com, firstname.lastname@example.com, firstname.lastname@example.com Abstract Nonlinear PID design is difficult if one approaches modeling approach with traditional linear PID controller design techniques to arrive at a principled
Review of uranium bioassay techniques
Bogard, J.S.
A variety of analytical techniques is available for evaluating uranium in excreta and tissues at levels appropriate for occupational exposure control and evaluation. A few (fluorometry, kinetic phosphorescence analysis, {alpha}-particle spectrometry, neutron irradiation techniques, and inductively-coupled plasma mass spectrometry) have also been demonstrated as capable of determining uranium in these materials at levels comparable to those which occur naturally. Sample preparation requirements and isotopic sensitivities vary widely among these techniques and should be considered carefully when choosing a method. This report discusses analytical techniques used for evaluating uranium in biological matrices (primarily urine) and limits of detection reported in the literature. No cost comparison is attempted, although references are cited which address cost. Techniques discussed include: {alpha}-particle spectrometry; liquid scintillation spectrometry, fluorometry, phosphorometry, neutron activation analysis, fission-track counting, UV-visible absorption spectrophotometry, resonance ionization mass spectrometry, and inductively-coupled plasma mass spectrometry. A summary table of reported limits of detection and of the more important experimental conditions associated with these reported limits is also provided.
Impact of External Heat-shielding Techniques on Shell Surface...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
External Heat-shielding Techniques on Shell Surface Temperatures and Dynamic Shell Thermal Deformation of Diesel Engine Emission Control Systems Impact of External Heat-shielding...
Assessor Training Assessment Techniques
NVLAP Assessor Training Assessment Techniques: Communication Skills and Conducting an Assessment listener �Knowledgeable Assessor Training 2009: Assessment Techniques: Communication Skills & Conducting, truthful, sincere, discrete � Diplomatic � Decisive � Selfreliant Assessor Training 2009: Assessment
attitude control motor: Topics by E-print Network
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time-varying dynamics, and hence their speed control is a challenging problem in the industry. The advent of vector control techniques has solved induction motor control problems....
As radiation safety specialists, one of the things we are required to do is evaluate tools, equipment, materials and work practices and decide whether the use of these products or work practices will reduce radiation dose or risk to the environment. There is a tendency for many workers that work with radioactive material to accomplish radiological work the same way they have always done it rather than look for new technology or change their work practices. New technology is being developed all the time that can make radiological work easier and result in less radiation dose to the worker or reduce the possibility that contamination will be spread to the environment. As we discuss the various tools and techniques that reduce radiation dose, keep in mind that the radiological controls should be reasonable. We can not always get the dose to zero, so we must try to accomplish the work efficiently and cost-effectively. There are times we may have to accept there is only so much you can do. The goal is to do the smart things that protect the worker but do not hinder him while the task is being accomplished. In addition, we should not demand that large amounts of money be spent for equipment that has marginal value in order to save a few millirem. We have broken the handout into sections that should simplify the presentation. Time, distance, shielding, and source reduction are methods used to reduce dose and are covered in Part I on work execution. We then look at operational considerations, radiological design parameters, and discuss the characteristics of personnel who deal with ALARA. This handout should give you an overview of what it takes to have an effective dose reduction program.
Authors, Various
3 1st Edition FTN4 OPTIMIZATION TECHNIQUES November 1979O. INTRODUCTION 1. COt1PILER OPTIMIZATIONS 2. SOURCE CODEcode. Most of these optimizations decrease central processor
Geothermal-resource assessment of the Steamboat-Routt Hot Springs area, Colorado. Resources Series 22
Pearl, R.H.; Zacharakis, T.G.; Ringrose, C.D.
An assessment of the Steamboat Springs region in northwest Colorado was initiated and carried out in 1980 and 1981. The goal of this program was to delineate the geological features controlling the occurrence of the thermal waters (temperatures in excess of 68/sup 0/F (20/sup 0/C)) in this area at Steamboat Springs and 8 miles (12.8 km) north at Routt Hot Springs. Thermal waters from Heart Spring, the only developed thermal water source in the study area, are used in the municipal swimming pool in Steamboat Springs. The assessment program was a fully integrated program consisting of: dipole-dipole, Audio-magnetotelluric, telluric, self potential and gravity geophysical surveys, soil mercury and soil helium geochemical surveys; shallow temperature measurements; and prepartion of geological maps. The investigation showed that all the thermal springs appear to be fault controlled. Based on the chemical composition of the thermal waters it appears that Heart Spring in Steamboat Springs is hydrologically related to the Routt Hot Springs. This relationship was further confirmed when it was reported that thermal waters were encountered during the construction of the new high school in Strawberry Park on the north side of Steamboat Springs. In addition, residents stated that Strawberry Park appears to be warmer than the surrounding country side. Geological mapping has determined that a major fault extends from the Routt Hot Springs area into Strawberry Park.
Polymerization reactor control
Ray, W.H.
The principal difficulties in achieving good control of polymerization reactors are related to inadequate on-line measurement, a lack of understanding of the dynamics of the process, the highly sensitive and nonlinear behavior of these reactors, and the lack of well-developed techniques for the control of nonlinear processes. Some illustrations of these problems and a discussion of potential techniques for overcoming some of these difficulties is provided.
Control of blood glucose levels through glucose measurement and insulin injection can reduce the occurrence of complications in type 1 diabetes. Methods such as the `finger-stick' technique have proven expensive, cumbersome
Mottram, Nigel
Background Control of blood glucose levels through glucose measurement and insulin injection can pioneered the first portable and programmable device for measuring blood glucose levels which can also detect other blood circulating molecules such as lactate. Technology The technology makes use
Apollo: Adaptive power optimization and Control for the land Warrior
Pedram, Massoud
Apollo: Adaptive power optimization and Control for the land Warrior Massoud Pedram Dept. of EE management Architecture organization techniquesArchitecture organization techniques Apollo TestbedApollo
An intelligent appliance control
Maher, C.A. Jr. [Tridelta Industries, Inc., Mentor, OH (United States)] [Tridelta Industries, Inc., Mentor, OH (United States); McMahon, G. [Pitco Frialator, Inc., Concord, NH (United States)] [Pitco Frialator, Inc., Concord, NH (United States)
This paper describes the use of a microcontroller to implement an adaptive form of an ON/OFF-type control system. The principal benefits that this technique offers are the ability to self adjust automatically to the dynamics of the appliance being controlled and to minimize the cyclic wear and tear on the final heat-control elements. This technique is best applied to those systems with at least one large energy storage element (e.g., thermal mass), not needing fine control of the controlled variable, and ones using ON/OFF (relay type) rather than continuous final control outputs. This profile encompasses a large number of potential applications, particularly in the appliance field.
Muske, K.R. [Villanova Univ., PA (United States). Dept. of Chemical Engineering; Hansen, G.A.; Howse, J.W.; Cagliostro, D.J. [Los Alamos National Lab., NM (United States); Chaubal, P.C. [Inland Steel Industries Inc., East Chicago, IN (United States). Research Labs.
This paper outlines the process model and model-based control techniques implemented on the hot blast stoves for the No. 7 Blast Furnace at the Inland Steel facility in East Chicago, Indiana. A detailed heat transfer model of the stoves is developed. It is then used as part of a predictive control scheme to determine the minimum amount of fuel necessary to achieve the blast air requirements. The controller also considers maximum and minimum temperature constraints within the stove.
Laughlin, Robert B.
to the repair of hydraulic turbine runners and large pump impellers. Reclamation operates and maintains a wideFACILITIES INSTRUCTIONS, STANDARDS, & TECHNIQUES VOLUME 2-5 TURBINE REPAIR Internet Version variety of reaction and impulse turbines as well as axial flow, mixed flow, radial flow pumps and pump
Galaxy Redshifts: Improved Techniques
A. F. Heavens
This paper analyses the effects of random noise in determining errors and confidence levels for galaxy redshifts obtained by cross-correlation techniques. The main finding is that confidence levels have previously been overestimated, and errors inaccurately calculated in certain applications. New formul\\ae\\ are presented.
The attribute measurement technique
Macarthur, Duncan W [Los Alamos National Laboratory; Langner, Diana [Los Alamos National Laboratory; Smith, Morag [Los Alamos National Laboratory; Thron, Jonathan [Los Alamos National Laboratory; Razinkov, Sergey [RFNC-VNIIEF; Livke, Alexander [RFNC-VNIIEF
Any verification measurement performed on potentially classified nuclear material must satisfy two seemingly contradictory constraints. First and foremost, no classified information can be released. At the same time, the monitoring party must have confidence in the veracity of the measurement. An information barrier (IB) is included in the measurement system to protect the potentially classified information while allowing sufficient information transfer to occur for the monitoring party to gain confidence that the material being measured is consistent with the host's declarations, concerning that material. The attribute measurement technique incorporates an IB and addresses both concerns by measuring several attributes of the nuclear material and displaying unclassified results through green (indicating that the material does possess the specified attribute) and red (indicating that the material does not possess the specified attribute) lights. The attribute measurement technique has been implemented in the AVNG, an attribute measuring system described in other presentations at this conference. In this presentation, we will discuss four techniques used in the AVNG: (1) the 1B, (2) the attribute measurement technique, (3) the use of open and secure modes to increase confidence in the displayed results, and (4) the joint design as a method for addressing both host and monitor needs.
GARDIENNAGE Help Desk technique
Nesterov, Yurii
--> Relais vers Garde GTPW ASCENSEURS 1ère impulsion Dispatching UCL (Système EBI Honeywell GTPW) Dispatching UCL --> SECURITAS LEW ALARMES CDC (Système EBI -Enterprise Building Integrator -Honeywell GTPW téléphonique ) TECHNIQUES CDC (Système EBI Honeywell GTPW) GTPW (Heures ouvrables) CDC (En dehors des heures
Query Optimization Techniques Class Hierarchies
Mannheim, Universität
Query Optimization Techniques Exploiting Class Hierarchies Sophie Cluet 1 Guido Moerkotte 2 1 INRIA Since the introduction of object base management systems (OBMS), many query optimization techniques tailored for object query languages have been proposed. They adapt known optimization techniques
Resin infiltration transfer technique
Miller, David V. (Pittsburgh, PA); Baranwal, Rita (Glenshaw, PA)
A process has been developed for fabricating composite structures using either reaction forming or polymer infiltration and pyrolysis techniques to densify the composite matrix. The matrix and reinforcement materials of choice can include, but are not limited to, silicon carbide (SiC) and zirconium carbide (ZrC). The novel process can be used to fabricate complex, net-shape or near-net shape, high-quality ceramic composites with a crack-free matrix.
Innovative Technologies and Techniques
Samano, R.; Swinford, S.
November 2014 Innovative Technologies and Techniques ESL-KT-14-11-22 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 What�s New in Energy Efficient Cooling Systems? ? Director of Energy Management ? Moving Away From... Refrigerants ? LEED ? Reducing the Carbon Footprint ? Improving Indoor Air Quality - IAQ ? High Efficiency Fans and Motors ? Economizers ESL-KT-14-11-22 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 Outside Air Management Experts...
BOUMEDIENE, D; The ATLAS collaboration
Jet finding techniques at hadron colliders, including pile-up removal tricks, jet deconstruction, etc
Data Mining: Concepts and Techniques
Geldenhuys, Jaco
11 Data Mining: Concepts and Techniques (3rd ed.) -- Chapter 1 -- Jiawei Han, Micheline Kamber. All rights reserved. #12;July 29, 2013 Data Mining: Concepts and Techniques 2July 29, 2013 Data Mining: Concepts and Techniques 2 #12;July 29, 2013 Data Mining: Concepts and Techniques 3July 29, 2013 Data Mining
Mound's decommissioning experience, tooling, and techniques
Combs, A.B.; Davis, W.P.; Elswick, T.C.; Garner, J.M.; Geichman, J.R.
Monsanto Research Corporation (MRC), which operates Mound for the Department of Energy (DOE), has been decommissioning radioactively contaminated facilities since 1949. We are currently decommissioning three plutonium-238 contaminated facilities (approximately 50,000 ft/sup 2/) that contained 1100 linear ft of gloveboxes; 900 linear ft of conveyor housing; 2650 linear ft of dual underground liquid waste lines; and associated contaminated piping, services, equipment, structures, and soil. As of June 1982, over 29,000 Ci of plutonium-238 have been removed in waste and scrap residues. As a result of the current and previous decommissioning projects, valuable experience has been gained in tooling and techniques. Special techniques have been developed in planning, exposure control, contamination control, equipment removal, structural decontamination, and waste packaging.
American Institute of Aeronautics and Astronautics Optical Beam Control Testbeds
flexible optical systems. Consequently, the application and evaluation of modern control techniques be improved with the use of more modern techniques. Different control techniques, however, can be evaluatedAmerican Institute of Aeronautics and Astronautics 1 Optical Beam Control Testbeds Brij. N. Agrawal
Automotive Power Generation and Control
Caliskan, Vahe
This paper describes some new developments in the application of power electronics to automotive power generation and control. A new load-matching technique is introduced that uses a simple switched-mode rectifier to achieve ...
Trace Analytical Techniques for Nuclear Forensics
Halverson, J.E.
Over the history of the Savannah River Site, the Savannah River Technology Center (SRTC) has developed high sensitivity analytical capabilities in support of the Site's Environmental Monitoring Program and nuclear material protection process. Many of these techniques are applicable to the developing need for nuclear forensic analysis capabilities. Radiological and critically control procedures are in place at the SRTC, as well as clean room practices, to minimize the potential for a radiological evidentiary sample to contaminate personnel and the facility, as well as to minimize contaminating the sample thus rendering it useless by law enforcement agencies. Some of the trace analytical techniques available at the SRTC include ultra-low-level gamma and alpha spectrometry, high-sensitivity thermal ionization mass spectrometry, time-of-flight secondary ion mass spectrometry and trace organic analyses. These techniques have been tested during a planned domestic smuggling exercise and in the analysis of an unknown sample.In the event of an interdiction involving the illegal use or movement of radioactive material by U.S. law enforcement agencies (local, state or federal) forensic analyses will be used in developing and building a legal case against the perpetrators. The Savannah River Technology Center (SRTC) at the U.S. Department of Energy's Savannah River Site, a former nuclear production site currently conducting nuclear material stabilization missions, located in Aiken South Carolina, has a long history of performing trace analytical analyses for environmental monitoring. Many of these techniques are also applicable to nuclear forensic analyses. A summary of the trace analytical techniques used at the SRTC, which are applicable to Nuclear Forensics, is presented in this paper.Contamination control, of facilities and personnel involved in the analytical analyses, as well as preventing contamination of the sample, is a unique challenge for nuclear forensic analyses. A discussion of sample handling and contamination control procedures is included in this paper. Some of the applicable analytical techniques available at the SRTC for nuclear forensic analyses include: ultra-low-level gamma and alpha spectroscopy, high-sensitivity thermal-ionization mass spectrometry (TIMS), time-of-flight secondary ion mass spectrometry (TOF-SIMS), and trace organic analyses. Results from analyses of special nuclear material (SNM) standards, materials from nuclear smuggling exercises, and materials of unknown origin will be presented.
Hybrid Backstepping Control for Rotorcraft Antoine Drouin, Jules G. Slama and Flix A.C. Mora-Camino
Paris-Sud XI, Universit� de
been applied to airships flight control law design [4], is introduced. Two different design techniques
Thermoelectric Temperature Control
Saffman, Mark
NOTE 201TM TECHNICAL Optimizing Thermoelectric Temperature Control Systems #12;2 May 1995 92-040000A � 1995 Wavelength Electronics, Inc. Thermoelectric coolers (TECs) are used in a variety understanding of thermal management techniques and carefully select the thermoelectric module, temperature
Cheng, George Shu-Xing; Mulkey, Steven L; Wang, Qiang; Chow, Andrew J
A method and apparatus for intelligently controlling continuous process variables. A Dream Controller comprises an Intelligent Engine mechanism and a number of Model-Free Adaptive (MFA) controllers, each of which is suitable to control a process with specific behaviors. The Intelligent Engine can automatically select the appropriate MFA controller and its parameters so that the Dream Controller can be easily used by people with limited control experience and those who do not have the time to commission, tune, and maintain automatic controllers.
Controller Synthesis of Discrete Linear Plants Using MATTEO SLANINA
Sankaranarayanan, Sriram
Controller Synthesis of Discrete Linear Plants Using Polyhedra MATTEO SLANINA Stanford University controllers for linear discrete systems with disturbances. Given a plant description and a safety We study techniques for synthesizing synchronous controllers for affine plants with disturbances
Nonlinear Optimal Control Techniques for Vibration Attenuation Using Magnetostrictive Actuators
of vibrations in aeronautic, aerospace, automotive, and industrial systems constitutes a fundamental component compounds, and shape memory alloys (SMA) -- have emerged as viable alternatives for both passive and active
Control Techniques for Uncore Power Mangement in Chip Multiprocessor Designs
Xu, Zheng
In chip-multiprocessor (CMP) designs, when the number of core increases, the size of on-chip communication fabric and data storage grows accordingly and therefore the chip power challenge is exacerbated. This thesis work considers the power...
artificial techniques controlling: Topics by E-print Network
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photovoltaic systems with multimodal power curves-phased grid- connected photovoltaic (PV) arrays which have to provide maximum power irrespective of solar systems while the...
Techniques for Mercury Control and Measurement in Gasification Systems
Granite, E.J.; King, W.P.; Pennline, H.W.
A major concern for power systems that use coal as an energy source is the air emissions from the plant. Although certain air emissions are currently regulated, the emergence of new regulations for other pollutants are on the horizon. Gasification is an important strategy for increasing the utilization of abundant domestic coal reserves. The Department of Energy envisions increased use of gasification in the United States during the next twenty years. As such, the DOE Gasification Technologies Program will strive to approach a near-zero emissions goal with respect to pollutants. The mercury research detailed in this proposal addresses the Gas Cleaning and Conditioning program technology area.
Sliding-mode amplitude control techniques for harmonic oscillators
Marquart, Chad A.
signal operating at frequencies ranging from 170 MHz to 2.1 GHz. Total harmonic distortion is maintained below 0:8% for an oscillation amplitude of 2 Vpp over the entire tuning range. Phase noise is measured as -105.6 dBc/Hz at 1.135 GHz with a 1 MHz...
Paris-Sud XI, Université de
Christophe Lenglet2 Jean-Philippe Pons2 Nicolas Wotawa2 Rachid Deriche2 Olivier Faugeras2 Stefano Soatto1 1 of these methods is their computational complexity since it is necessary to resort to Markov Chain Monte Carlo meth
Krstic, Miroslav
of low temperature and high density where the thermonuclear reaction is inherently thermally unstable. Figure 1a shows that for low temperatures the rate of thermonuclear reaction for a D-T mixture in stabilization of the thermonuclear reaction can be obtained. Neverthe- less, this approach is often insufficient
EERE QC Workshop: Overview of Quality Control Techniques | Department of
Broader source: Energy.gov (indexed) [DOE]
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China U.S.ContaminationJulySavannah RiverSustainabilityEnergy Overview of quality
Optimal control techniques for thermo-acoustic tomography Maitine Bergounioux
Paris-Sud XI, Universit� de
. These hybrid systems use an electromagnetic pulse as an input and record ultrasound waves as an output-acoustic tomography (TAT) when the heating is realized by means of microwaves, and of photo-acoustic tomography (PAT) when optical heating is used. While in TAT waves of radio frequency range are used to trigger
New imaging technique provides improved insight into controlling the plasma
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AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for Renewable Energy:Nanowire Solar541,9337, 2011RNew Visible toNew appNew generation
EERE QC Workshop: Overview of Quality Control Techniques
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of98-F, Western22, 2014FluidLaboratoryDesertEERE PowerPoint
Application of AI techniques to blast furnace operations
Iida, Osamu; Ushijima, Yuichi; Sawada, Toshiro [Kawasaki Steel Corp., Kurashiki (Japan)
It was during the first stages of application of artificial intelligence (AI) to industrial fields, that the ironmaking division of Mizushima works at Kawasaki Steel recognized its potential. Since that time, the division has sought applications for these techniques to solve various problems. AI techniques applied to control the No. 3 blast furnace operations at the Mizushima works include: Blast furnace control by a diagnostic type of expert system that gives guidance to the actions required for blast furnace operation as well as control of furnace heat by automatically setting blast temperature; Hot stove combustion control by a combination of fuzzy inference and a physical model to insure good thermal efficiency of the stove; and blast furnace burden control using neural networks makes it possible to connect the pattern of gas flow distribution with the condition of the furnace. Experience of AI to control the blast furnace and other ironmaking operations has proved its capability for achieving automation and increased operating efficiency. The benefits are very high. For these reasons, the applications of AI techniques will be extended in the future and new techniques studied to further improve the power of AI.
Tomasz Plawski, J. Hovater
A digital low level radio frequency (RF) system typically incorporates either a heterodyne or direct sampling technique, followed by fast ADCs, then an FPGA, and finally a transmitting DAC. This universal platform opens up the possibilities for a variety of control algorithm implementations. The foremost concern for an RF control system is cavity field stability, and to meet the required quality of regulation, the chosen control system needs to have sufficient feedback gain. In this paper we will investigate the effectiveness of the regulation for three basic control system algorithms: I&Q (In-phase and Quadrature), Amplitude & Phase and digital SEL (Self Exciting Loop) along with the example of the Jefferson Lab 12 GeV cavity field control system.
Cache Energy Optimization Techniques For Modern Processors
Mittal, Sparsh [ORNL] ORNL
Modern multicore processors are employing large last-level caches, for example Intel's E7-8800 processor uses 24MB L3 cache. Further, with each CMOS technology generation, leakage energy has been dramatically increasing and hence, leakage energy is expected to become a major source of energy dissipation, especially in last-level caches (LLCs). The conventional schemes of cache energy saving either aim at saving dynamic energy or are based on properties specific to first-level caches, and thus these schemes have limited utility for last-level caches. Further, several other techniques require offline profiling or per-application tuning and hence are not suitable for product systems. In this book, we present novel cache leakage energy saving schemes for single-core and multicore systems; desktop, QoS, real-time and server systems. Also, we present cache energy saving techniques for caches designed with both conventional SRAM devices and emerging non-volatile devices such as STT-RAM (spin-torque transfer RAM). We present software-controlled, hardware-assisted techniques which use dynamic cache reconfiguration to configure the cache to the most energy efficient configuration while keeping the performance loss bounded. To profile and test a large number of potential configurations, we utilize low-overhead, micro-architecture components, which can be easily integrated into modern processor chips. We adopt a system-wide approach to save energy to ensure that cache reconfiguration does not increase energy consumption of other components of the processor. We have compared our techniques with state-of-the-art techniques and have found that our techniques outperform them in terms of energy efficiency and other relevant metrics. The techniques presented in this book have important applications in improving energy-efficiency of higher-end embedded, desktop, QoS, real-time, server processors and multitasking systems. This book is intended to be a valuable guide for both newcomers and veterans in the field of cache power management. It will help graduate students, CAD tool developers and designers in understanding the need of energy efficiency in modern computing systems. Further, it will be useful for researchers in gaining insights into algorithms and techniques for micro-architectural and system-level energy optimization using dynamic cache reconfiguration. We sincerely believe that the ``food for thought'' presented in this book will inspire the readers to develop even better ideas for designing ``green'' processors of tomorrow.
Aquatic Plant Control Research Program
US Army Corps of Engineers
-1 June 2012 Development of an Integrated Pest Management Approach for Controlling Giant Salvinia Using approach for developing integrated pest management (IPM) techniques and pro- cedures to control by infestations in Toledo Bend Reservoir in 1998 (Owens et al. 2004). By 2004, giant salvinia was reported in four
Centrifuge Techniques and Apparatus for Transport Experiments in Porous Media
Earl D. Mattson; Carl D. Paler; Robert W. Smith; Markus Flury
This paper describes experimental approaches and apparatus that we have developed to study solute and colloid transport in porous media using Idaho National Laboratory's 2-m radius centrifuge. The ex-perimental techniques include water flux scaling with applied acceleration at the top of the column and sub-atmospheric pressure control at the column base, automation of data collection, and remote experimental con-trol over the internet. These apparatus include a constant displacement piston pump, a custom designed liquid fraction collector based on switching valve technology, and modified moisture monitoring equipment. Suc-cessful development of these experimental techniques and equipment is illustrated through application to transport of a conservative tracer through unsaturated sand column, with centrifugal acceleration up to 40 gs. Development of such experimental equipment that can withstand high accelerations enhances the centrifuge technique to conduct highly controlled unsaturated solute/colloid transport experiments and allows in-flight liquid sample collection of the effluent.
Project specific selection of decommissioning techniques
Christ, B.G.; Wehner, E.L. [NUKEM GmbH, Alzenau (Germany). Nuclear Technology Div.
Three decommissioning projects with quite different contamination characteristics were terminated with the requested result of freely released rooms for dismantled buildings under supervision of the responsible authorities. The examples show that control areas with different kinds of contamination and different equipment can be decommissioned with reasonable effort. The specific selection of decontamination methods and measurement techniques optimizes the performance of the project and lowers the amount of primary and secondary active waste. The careful planning of radiation protection measures ensures the safe work within the foreseen time schedule.
Low Temperature Material Bonding Technique
Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)
A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.
Low temperature material bonding technique
Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)
A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.
Common Control System Vulnerability
Trent Nelson
The Control Systems Security Program and other programs within the Idaho National Laboratory have discovered a vulnerability common to control systems in all sectors that allows an attacker to penetrate most control systems, spoof the operator, and gain full control of targeted system elements. This vulnerability has been identified on several systems that have been evaluated at INL, and in each case a 100% success rate of completing the attack paths that lead to full system compromise was observed. Since these systems are employed in multiple critical infrastructure sectors, this vulnerability is deemed common to control systems in all sectors. Modern control systems architectures can be considered analogous to today's information networks, and as such are usually approached by attackers using a common attack methodology to penetrate deeper and deeper into the network. This approach often is composed of several phases, including gaining access to the control network, reconnaissance, profiling of vulnerabilities, launching attacks, escalating privilege, maintaining access, and obscuring or removing information that indicates that an intruder was on the system. With irrefutable proof that an external attack can lead to a compromise of a computing resource on the organization's business local area network (LAN), access to the control network is usually considered the first phase in the attack plan. Once the attacker gains access to the control network through direct connections and/or the business LAN, the second phase of reconnaissance begins with traffic analysis within the control domain. Thus, the communications between the workstations and the field device controllers can be monitored and evaluated, allowing an attacker to capture, analyze, and evaluate the commands sent among the control equipment. Through manipulation of the communication protocols of control systems (a process generally referred to as ''reverse engineering''), an attacker can then map out the control system processes and functions. With the detailed knowledge of how the control data functions, as well as what computers and devices communicate using this data, the attacker can use a well known Man-in-the-Middle attack to perform malicious operations virtually undetected. The control systems assessment teams have used this method to gather enough information about the system to craft an attack that intercepts and changes the information flow between the end devices (controllers) and the human machine interface (HMI and/or workstation). Using this attack, the cyber assessment team has been able to demonstrate complete manipulation of devices in control systems while simultaneously modifying the data flowing back to the operator's console to give false information of the state of the system (known as ''spoofing''). This is a very effective technique for a control system attack because it allows the attacker to manipulate the system and the operator's situational awareness of the perceived system status. The three main elements of this attack technique are: (1) network reconnaissance and data gathering, (2) reverse engineering, and (3) the Man-in-the-Middle attack. The details of this attack technique and the mitigation techniques are discussed.
Review : integration of EMI technique with global vibration technique
Ni, Suteng
In the last decade, the development of Structural Health Monitoring (SHM) has been skyrocketing because of the serious consequences that come with structural failure. Traditional damage detection techniques, also known as ...
Argonne National Laboratory Scientists Invent Breakthrough Technique...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Argonne National Laboratory Scientists Invent Breakthrough Technique in Nanotechnology Argonne National Laboratory Scientists Invent Breakthrough Technique in Nanotechnology March...
Robust Reinforcement Learning Control with Static and Dynamic Stability
Kretchmar, R. Matthew
Typical controller design techniques are based on a mathematical model that captures as much as possible for the plant model, but for the real plant. Robust control theory addresses this goal by including in the model, or known and nonlinear, parts of the plant. Robust control techniques are applied to the plant model
Acoustic techniques for localizing holdup
Vnuk, D.
Material that does not come out of a process as product or waste is called holdup. When this is fissile material, its location and quantity must be determined to improve safeguards and security as well as safety at the facility. The most common method for detecting and measuring holdup is with radiation based techniques. When using them, one must consider equipment geometry, geometry of holdup, and effects of background radiation when converting the radiation measurement into a fissile material quantity. We are developing complementary techniques that use tiny acoustic transducers, which are unaffected by background radiation, to improve holdup measurements by aiding in determining the above conversion factors for holdup measurements. Thus far, we have applied three techniques, Acoustic Interferometry, Pulse Echo, and bending Wave Propagation, of which the latter appears most effective. This paper will describe each of these techniques and show how they may ultimately reduce costs and personnel radiation exposure while increasing confidence I and accuracy of holdup measurements.
Experimental techniques and measurement accuracies
Bennett, E.F.; Yule, T.J.; DiIorio, G.; Nakamura, T.; Maekawa, H.
A brief description of the experimental tools available for fusion neutronics experiments is given. Attention is paid to error estimates mainly for the measurement of tritium breeding ratio in simulated blankets using various techniques.
Bhadra, D.K.; Petrie, T.W.; Peuron, U.A.; Rawls, J.M.
The ripple contribution to the ion thermal conductivity is ideally suited in magnitude, temperature dependence, and spatial dependence to serve as a burn control mechanism. Furthermore, a considerable measure of automatic burn control results because of the radial shift of the plasma to a region of higher ripple. Unfortunately, the window in ripple values consistent with both ignition and a burn equilibrium is uncomfortably narrow, given the current lack of contact between the theoretical models of ripple transport and experimental observations. A survey is made of the techniques to vary the ripple and thus broaden the design window. One new technique is discussed in some detail: the use of ferromagnetic materials in the shield with magnetic properties which are sensitive functions of the operating temperature.
Feasibility Studies on Disturbance Feedforward Techniques to Improve Wind Turbine Load Mitigation Performance: January 2009 -- January 2010
Laks, J.H.; Dunne, F.; Pao, L. Y.
This study investigates disturbance feedforward and preview control to better understand the best possible improvement in load mitigation using advanced wind measurement techniques.
Skogestad, Sigurd
PROCESS CONTROLLABILITY ANALYSIS USING LINEAR AND NONLINEAR OPTIMISATION Samara D. Chenery October linear and nonlinear dynamic optimisation techniques. For the linear case an optimal control problem is formulated to assess the best achievable performance for the set of linear time invariant (LTI) controllers
Modeling and Control of Advanced Technology Engines
Stefanopoulou, Anna
in powertrain control systems, largely driven by government regulations aimed at improving fuel economy, and apply classical and modern control techniques to improve engine performance. Moreover, we study control systems. #12;c Anna Stefanopoulou 1996 All Rights Reserved #12;Dedicated to George, Kaite
Empirical Analysis of Transmission Power Control Algorithms
Culler, David E.
Empirical Analysis of Transmission Power Control Algorithms for Wireless Sensor Networks Jaein � Power saving techniques in WSN � Duty-cycling, TX-power control, clustering � We study effect of TX-power transmission. End-to-end delivery rate TX Power Control Best of Fixed TX Power El Batt [1] 36.5% 35.5% PCBL [6
On the decentralized H2 optimal control
On the decentralized H2 optimal control of bilateral teleoperation systems with time delays Maxim Kristalny and Jang Ho Cho Abstract-- Decentralized control of bilateral teleoperation systems with time multiplicative delay. The recent loop shifting techniques for delayed systems control are used then to find
Quantum gates via relativistic remote control
Eduardo Martin-Martinez; Chris Sutherland
We harness general relativistic effects to gain quantum control on a stationary qubit in an optical cavity by controlling the non-inertial motion of a different probe atom. Furthermore, we show that by considering relativistic trajectories of the probe, we enhance the efficiency of the quantum control. We explore the possible use of these relativistic techniques to build universal quantum gates.
Group Members Synthesis of Nanostructured Materials Advanced Characterization Techniques
of nanostructured materials. � Applications in nanophotonics, nanoelectronics, and energy. Experimental techniques, S. Gradecak,"Graphene cathode-based ZnO nanowire hybrid solar cells", Nano Letters 13, 233-239 (2013 particle composition to control structural and optical properties of GaN nanowires", Nanotechnology 23
Hamman, Philip J.; Drees, Bastiaan M.; Vinson, S. Bradleigh
fire ant control usually are labeled only for certain treatment sites. The techniques for applying these products also vary with the treatment sites. Care must be taken to select the best combination of control agents and application methods... in each situation to attain optimum results. The Non-Control Option - Why Consider it? In areas where fire ants are not causing a problem, it may be best not to attempt any control measures. The reason is that a unit area, sue as an acre ofland, ill...
The Momotombo Geothermal Field, Nicaragua: Exploration and development case history study
This case history discusses the exploration methods used at the Momotombo Geothermal Field in western Nicaragua, and evaluates their contributions to the development of the geothermal field models. Subsequent reservoir engineering has not been synthesized or evaluated. A geothermal exploration program was started in Nicaragua in 1966 to discover and delineate potential geothermal reservoirs in western Nicaragua. Exploration began at the Momotombo field in 1970 using geological, geochemical, and geophysical methods. A regional study of thermal manifestations was undertaken and the area on the southern flank of Volcan Momotombo was chosen for more detailed investigation. Subsequent exploration by various consultants produced a number of geotechnical reports on the geology, geophysics, and geochemistry of the field as well as describing production well drilling. Geological investigations at Momotombo included photogeology, field mapping, binocular microscope examination of cuttings, and drillhole correlations. Among the geophysical techniques used to investigate the field sub-structure were: Schlumberger and electromagnetic soundings, dipole mapping and audio-magnetotelluric surveys, gravity and magnetic measurements, frequency domain soundings, self-potential surveys, and subsurface temperature determinations. The geochemical program analyzed the thermal fluids of the surface and in the wells. This report presents the description and results of exploration methods used during the investigative stages of the Momotombo Geothermal Field. A conceptual model of the geothermal field was drawn from the information available at each exploration phase. The exploration methods have been evaluated with respect to their contributions to the understanding of the field and their utilization in planning further development. Our principal finding is that data developed at each stage were not sufficiently integrated to guide further work at the field, causing inefficient use of resources.
Experimental results of a predictive neural network HVAC controller
Jeannette, E.; Assawamartbunlue, K.; Kreider, J.F. [Univ. of Colorado, Boulder, CO (United States); Curtiss, P.S. [Architectural Energy Corp., Boulder, CO (United States)
Proportional, integral, and derivative (PID) control is widely used in many HVAC control processes and requires constant attention for optimal control. Artificial neural networks offer the potential for improved control of processes through predictive techniques. This paper introduces and shows experimental results of a predictive neural network (PNN) controller applied to an unstable hot water system in an air-handling unit. Actual laboratory testing of the PNN and PID controllers show favorable results for the PNN controller.
Efficient Robust Optimization for Robust Control with Constraints
PJ Goulart
Oct 3, 2005 ... Abstract: This paper proposes an efficient computational technique for the optimal control of linear discrete-time systems subject to bounded�...
Innovative, lower cost sensors and controls yield better energy...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
and controls yield better energy efficiency ORNL researchers are experimenting with additive roll-to-roll manufacturing techniques to develop low-cost wireless sensors....
Simulation and Control of Humanoid Rolling and Falling Behaviors
Brown, David
Control Techniques for Figure Animation. IEEE Computer Graphics andcontrol for interactive character animation. Proceedings of the 11th Pacific Conference on Computer Graphics and
Direct versus Facility Centric Load Control for Automated Demand Response
Piette, Mary Ann
Keywords: Demand response, automation, commercial buildings,Demand Response and Energy Efficiency in Commercial Buildings,Building Control Strategies and Techniques for Demand Response.
Erasure Techniques in MRD codes
W. B. Vasantha Kandasamy; Florentin Smarandache; R. Sujatha; R. S. Raja Durai
This book is organized into six chapters. The first chapter introduces the basic algebraic structures essential to make this book a self contained one. Algebraic linear codes and their basic properties are discussed in chapter two. In chapter three the authors study the basic properties of erasure decoding in maximum rank distance codes. Some decoding techniques about MRD codes are described and discussed in chapter four of this book. Rank distance codes with complementary duals and MRD codes with complementary duals are introduced and their applications are discussed. Chapter five introduces the notion of integer rank distance codes. The final chapter introduces some concatenation techniques.
Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]
Project controls are systems used to plan, schedule, budget, and measure the performance of a project/program. The cost estimation package is one of the documents that is used to establish the baseline for project controls. This chapter gives a brief description of project controls and the role the cost estimation package plays.
Data Mining: Concepts and Techniques
Geldenhuys, Jaco
1 Data Mining: Concepts and Techniques (3rd ed.) -- Chapter 3 -- Jiawei Han, Micheline Kamber. All rights reserved. #12;2013/08/12 2 #12;33 Chapter 3: Data Preprocessing n Data Preprocessing: An Overview n Data Quality n Major Tasks in Data Preprocessing n Data Cleaning n Data Integration n Data
Dissertation Imaging as Characterization Techniques
Sites, James R.
Telluride Photovoltaics The goal of increasing the efficiency of solar cell devices is a universal oneDissertation Imaging as Characterization Techniques for Thin-Film Cadmium Telluride Photovoltaics. Increased photovoltaic (PV) performance means an increase in competition with other energy tech- nologies
Application of Multivariable Control to Oil and Coal Fired Boilers
Swanson, K.
Increased visibility provided by advanced measurement and control techniques has shown that control of oil and coal fired boilers is a complex problem involving simultaneous determination of flue gas carbon monoxide, hydrocarbon, opacity...
Geometric numerical integration of nonholonomic systems and optimal control problems
M. de Leon; D. Martin de Diego; A. Santamaria Merino
A geometric derivation of numerical integrators for nonholonomic systems and optimal control problems is obtained. It is based in the classical technique of generating functions adapted to the special features of nonholonomic systems and optimal control problems.
Demand Control Utilizing Energy Management Systems - Report of Field Tests
Russell, B. D.; Heller, R. P.; Perry, L. W.
Energy Management systems and particularly demand controllers are becoming more popular as commercial and light industrial operations attempt to reduce their electrical usage and demand. Numerous techniques are used to control energy use and demand...
Numerical simulation of flow separation control by oscillatory fluid injection�
Resendiz Rosas, Celerino
In this work, numerical simulations of flow separation control are performed. The sep-aration control technique studied is called 'synthetic jet actuation'. The developed code employs a cell centered finite volume scheme which handles viscous...
Coherent control of single photon states
G. J. Milburn
We define a class of multi-mode single photon states suitable for quantum information applications. We show how standard amplitude modulation techniques may be used to control the pulse shape of single photon states.
OPTIMAL CONTROL APPLICATIONS AND METHODS Optim. Control Appl. Meth., 2004; 25:165180
Singh, Tarunraj
. KEY WORDS: linear programming; friction; vibratory system; pulse width control 1. INTRODUCTION term added to the input force. With this constraint, optimal control design techniques for linear systems can be used for systems with friction. One method to find a time optimal control profile is input
Recent advances in wavefront shaping techniques for biomedical applications
Yu, Hyeonseung; Lee, KyoReh; Yoon, Jonghee; Kim, KyungDuk; Lee, Shinwha; Park, YongKeun
Due to the highly inhomogeneous distributions of refractive indexes, light propagation in complex media such as biological tissue experiences multiple light scattering events. The suppression and control of multiple light scattering events are investigated because they offer the possibility of optical focusing and imaging through biological tissues, and they may open new avenues for diagnosis and treatment of several human diseases. In order to provide insight into how new optical techniques can address the issues of multiple light scattering in biomedical applications, the recent progress in optical wavefront-shaping techniques is summarized.
Innovative Exploration Techniques for Geothermal Assessment at...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Innovative Exploration Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Innovative Exploration...
Power system fault analysis based on intelligent techniques and intelligent electronic device data
Luo, Xu
techniques including expert systems, fuzzy logic and Petri-nets, as well as data from remote terminal units (RTUs) of supervisory control and data acquisition (SCADA) systems, and digital protective relays have been explored and utilized to fufill...
Novel technologies and techniques for low-cost phased arrays and scanning antennas
Rodenbeck, Christopher Timothy
This dissertation introduces new technologies and techniques for low-cost phased arrays and scanning antennas. Special emphasis is placed on new approaches for low-cost millimeter-wave beam control. Several topics are covered. A novel...
Advanced control strategies for HVAC&R systems�An overview: Part II: Soft and fusion control
D. Subbaram Naidu; Craig G. Rieger
A chronological overview of the advanced control strategies for HVAC&R is presented. The overview focuses on hard-computing or control techniques, such as proportional-integral-derivative, optimal, nonlinear, adaptive, and robust; soft-computing or control techniques, such as neural networks, fuzzy logic, genetic algorithms; and the fusion or hybrid of hard and soft control techniques. Part I focused on hardcontrol strategies; Part II focuses on soft and fusion control and some future directions in HVA&R research. This overview is not intended to be an exhaustive survey on this topic, and any omissions of other works is purely unintentional.
Publish date: 06/27/2011 ECE 4368: Advanced Control Systems
Gelfond, Michael
coordinator: Vittal Rao Textbook(s) and/or other required material: Dorf & Bishop: Modern Control Systems, and k. 1. Analyze complex control systems using modern techniques? 2. Design complex control systems using modern techniques? Topics covered: Discrete time systems - 6 hours Computer control - 6 hours
Graph partitioning advance clustering technique
Madhulatha, T Soni
Clustering is a common technique for statistical data analysis, Clustering is the process of grouping the data into classes or clusters so that objects within a cluster have high similarity in comparison to one another, but are very dissimilar to objects in other clusters. Dissimilarities are assessed based on the attribute values describing the objects. Often, distance measures are used. Clustering is an unsupervised learning technique, where interesting patterns and structures can be found directly from very large data sets with little or none of the background knowledge. This paper also considers the partitioning of m-dimensional lattice graphs using Fiedler's approach, which requires the determination of the eigenvector belonging to the second smallest Eigenvalue of the Laplacian with K-means partitioning algorithm.
Acoustic techniques in nuclear safeguards
Olinger, C.T.; Sinha, D.N.
Acoustic techniques can be employed to address many questions relevant to current nuclear technology needs. These include establishing and monitoring intrinsic tags and seals, locating holdup in areas where conventional radiation-based measurements have limited capability, process monitoring, monitoring containers for corrosion or changes in pressure, and facility design verification. These acoustics applications are in their infancy with respect to safeguards and nuclear material management, but proof-of-principle has been demonstrated in many of the areas listed.
Liquid measurement - Techniques and problems
Caffey, B.R.
This paper reviews a few liquid measurement techniques and their associated problems. In measuring liquid petroleum gas, the first obstacle to overcome is accomodating some form of volumetric measurement. This is usually accomplished by orifice, positive displacement, or turbine meters. Each of the three established methods is covered extensively by industry standards in the API Manual of Petroleum Standards. If the operator follows these standards, very accurate results can be achieved.
Data mining and visualization techniques
Wong, Pak Chung (Richland, WA); Whitney, Paul (Richland, WA); Thomas, Jim (Richland, WA)
Disclosed are association rule identification and visualization methods, systems, and apparatus. An association rule in data mining is an implication of the form X.fwdarw.Y where X is a set of antecedent items and Y is the consequent item. A unique visualization technique that provides multiple antecedent, consequent, confidence, and support information is disclosed to facilitate better presentation of large quantities of complex association rules.
Multiple input electrode gap controller
Hysinger, C.L.; Beaman, J.J.; Melgaard, D.K.; Williamson, R.L.
A method and apparatus for controlling vacuum arc remelting (VAR) furnaces by estimation of electrode gap based on a plurality of secondary estimates derived from furnace outputs. The estimation is preferably performed by Kalman filter. Adaptive gain techniques may be employed, as well as detection of process anomalies such as glows. 17 figs.
Multiple input electrode gap controller
Hysinger, Christopher L. (Austin, TX); Beaman, Joseph J. (Austin, TX); Melgaard, David K. (Albuquerque, NE); Williamson, Rodney L. (Albuquerque, NE)
A method and apparatus for controlling vacuum arc remelting (VAR) furnaces by estimation of electrode gap based on a plurality of secondary estimates derived from furnace outputs. The estimation is preferably performed by Kalman filter. Adaptive gain techniques may be employed, as well as detection of process anomalies such as glows.
1/5/97 page 1 energy A survey of energy saving techniques for mobile
Havinga, Paul J.M.
and the operating system must allow a user to control the power management. Remarkably, it appears that some energy review energy reduction techniques in the design of operating systems, including communication protocols regions, and disabling unused peripherals. System- design techniques include minimizing external accesses
Hyperbolic Approach to Fuzzy Control Is Optimal Hung T. Nguyen
Kreinovich, Vladik
Practical Control Situations Can Be Ade� quately Described by Linear Systems. One of the main problems are matrices. For such linear systems, there exist well�developed op� timal control techniques; see, e.g., [2 Control Problems Are, In General, Computationally Difficult. How can we control non� linear systems
Reception-Aware Power Control in Ad Hoc Mobile Networks
Mans, Bernard
Reception-Aware Power Control in Ad Hoc Mobile Networks Nirisha Shrestha and Bernard Mans Macquarie resource in ad hoc mobile networks, mak- ing power control a popular, yet crucial, technique. The network of power control non-trivial. For sake of simplicity, most existing power control protocols only consider
Incremental Design of a Power Transformer Station Controller using a
Paris-Sud XI, Universit� de
systems, polynomial dynamical system, supervisory control problem, optimal control, SIGNAL, SIGALI, power property verification and/or simulation techniques. The control theory of Discrete Event Systems allows us the physical model and the control/verification objectives to be ensured/checked. The SIGNAL compiler
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Control Also inside this issue: Special Science Call Projects Underway Two Postdoc Opportunities Announced Brown Carbon Review Paper Published Understanding Metal Reduction...
Nonlinear Trajectory Control of Multi-body Aerial Manipulators Marin Kobilarov
Kobilarov, Marin
Nonlinear Trajectory Control of Multi-body Aerial Manipulators Marin Kobilarov Laboratory- of-freedom aerial manipulators using linear control techniques [15] or nonlinear variable parameter for Computational Sensing and Robotics Johns Hopkins University Abstract This paper studies trajectory control
SECURITY TECHNIQUES Chris J Mitchell1
Mitchell, Chris
SECURITY TECHNIQUES Chris J Mitchell1 Introduction In this paper we consider the range of security security has been exerted. However, the techniques described are of general applicability by a security technique; in doing so we will distinguish between security features and security techniques (or
Scalable Techniques for Anomaly Detection
Yadav, Sandeep 1985-
-level domains. We deploy this tool at the edge of a university campus network for evaluation. Secondly, we focus on domain-fluxing botnet detection by exploiting the high entropy inherent in the set of domains used for locating the Command and Control (C...
Magnetotelluric Techniques | Open Energy Information
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Geochemical Techniques | Open Energy Information
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Adaptive gain improves reactor control
Whatley, M.J.; Pott, D.C.
An interesting application of the modern control theory technique called adaptive control is presently in use on a process located at a plant in the Standard Oil Co. (Ind.) system. The results of this application are: first, the transformation of an uncontrollable process to a controllable one; and, second, a significant economic savings to the corporation. It also shows that a detailed analysis of the mechanical, chemical and control systems can provide both the basis for revising an existing control system and some of the reasons why that system is inadequate. The contrast between classical and modern control theories is seen in four major areas. In classical systems, the controller manipulates the error to calculate its output. The error is subjected to a limited number of analog computing functions such as multiplication by a constant and integration. Each controller has one specific strategy--to hold the measured variable at the setpoint. And each controller controls only one variable, independent of all others. In a modern system, the controller can manipulate many different variables in addition to the error to compute its output. Its computing power is unlimited in a practical sense. It can do all classical computations plus many others, including a table look-up. The controller can independently change its strategy as a function of time or the condition of the process. It can also control many variables at one time to accomplish a complex objective. The implementation of a modern control theory project requires a good understanding of the dynamic, as well as the steady-state character of the process. As you can see we are limited only by our understanding of the process, our imagination, and the economics of the situation.
Control and Synchronization of Chaotic Fractional-Order Coullet System via Active Controller
M. Shahiri T.; A. Ranjbar N.; R. Ghaderi; S. H. Hosseinnia; S. Momani
In this paper, fractional order Coullet system is studied. An active control technique is applied to control this chaotic system. This type of controller is also applied to synchronize chaotic fractional-order systems in master-slave structure. The synchronization procedure is shown via simulation. The boundary of stability is obtained by both of theoretical analysis and simulation result. The numerical simulations show the effectiveness of the proposed controller.
Control of laser plasma instabilities in hohlraums
Kruer, W.L.
Laser plasma instabilities are an important constraint on the operating regime for inertial fusion. Many techniques have been developed to control the various laser-driven instabilities. Experiments with long scale length plasmas are testing these instability levels, the nonlinear regimes, and the control mechanisms.
Qualitative Heterogeneous Control of Higher Order Systems ?
Kuipers, Benjamin
framework, a methodology for the design of a controlled hybrid system based on attractors and transitions between them. This framework designs a robust controller that can accommodate bounded amounts techniques. The local models used in the design process are qualitative, allowing the use of partial
Qualitative Heterogeneous Control of Higher Order Systems
Kuipers, Benjamin
framework, a methodology for the design of a controlled hybrid system based on attractors and transitions between them. This framework designs a robust controller that can accommodate bounded amounts techniques. The local models used in the design process are qualitative, allowing the use of partial
Suyama, R.M.; Machen, D.R.; Johnson, J.A.
The control system for the Fusion Materials Irradiation Test (FMIT) Facility, under construction at Richland, Washington, uses current techniques in distributed processing to achieve responsiveness, maintainability and reliability. Developmental experience with the system on the FMIT Prototype Accelerator (FPA) being designed at the Los Alamos National Laboratory is described as a function of the system's design goals and details. The functional requirements of the FMIT control system dictated the use of a highly operator-responsive, display-oriented structure, using state-of-the-art console devices for man-machine communications. Further, current technology has allowed the movement of device-dependent tasks into the area traditionally occupied by remote input-output equipment; the system's dual central process computers communicate with remote communications nodes containing microcomputers that are architecturally similar to the top-level machines. The system has been designed to take advantage of commercially available hardware and software.
Compensation Techniques in Accelerator Physics
Hisham Kamal Sayed
Accelerator physics is one of the most diverse multidisciplinary fields of physics, wherein the dynamics of particle beams is studied. It takes more than the understanding of basic electromagnetic interactions to be able to predict the beam dynamics, and to be able to develop new techniques to produce, maintain, and deliver high quality beams for different applications. In this work, some basic theory regarding particle beam dynamics in accelerators will be presented. This basic theory, along with applying state of the art techniques in beam dynamics will be used in this dissertation to study and solve accelerator physics problems. Two problems involving compensation are studied in the context of the MEIC (Medium Energy Electron Ion Collider) project at Jefferson Laboratory. Several chromaticity (the energy dependence of the particle tune) compensation methods are evaluated numerically and deployed in a figure eight ring designed for the electrons in the collider. Furthermore, transverse coupling optics have been developed to compensate the coupling introduced by the spin rotators in the MEIC electron ring design.
Model building techniques for analysis.
Walther, Howard P.; McDaniel, Karen Lynn; Keener, Donald; Cordova, Theresa Elena; Henry, Ronald C.; Brooks, Sean; Martin, Wilbur D.
The practice of mechanical engineering for product development has evolved into a complex activity that requires a team of specialists for success. Sandia National Laboratories (SNL) has product engineers, mechanical designers, design engineers, manufacturing engineers, mechanical analysts and experimentalists, qualification engineers, and others that contribute through product realization teams to develop new mechanical hardware. The goal of SNL's Design Group is to change product development by enabling design teams to collaborate within a virtual model-based environment whereby analysis is used to guide design decisions. Computer-aided design (CAD) models using PTC's Pro/ENGINEER software tools are heavily relied upon in the product definition stage of parts and assemblies at SNL. The three-dimensional CAD solid model acts as the design solid model that is filled with all of the detailed design definition needed to manufacture the parts. Analysis is an important part of the product development process. The CAD design solid model (DSM) is the foundation for the creation of the analysis solid model (ASM). Creating an ASM from the DSM currently is a time-consuming effort; the turnaround time for results of a design needs to be decreased to have an impact on the overall product development. This effort can be decreased immensely through simple Pro/ENGINEER modeling techniques that summarize to the method features are created in a part model. This document contains recommended modeling techniques that increase the efficiency of the creation of the ASM from the DSM.
Embedded Controllers Control. Connectivity. Security.
Grantner, Janos L.
Application Summary MCF5282 HVAC and Security Control Panel Application Summary MCF5307 Music Media Player controllers to help get their products to market quickly and cost-effectively. Aggressive price of continuous innovative technology--provides customers with the opportunity to build market share
International Conference on Machine Control & Guidance 2008 1 Integration of Controllers for Filter Algorithms for
for Filter Algorithms for Construction Machine Guidance Alexander BEETZ*, Volker SCHWIEGER** Universit�t measurement techniques as well as control and filter algorithms. In Schwieger/Beetz 2007 could be shown
Pipeline Muffling and A Priori Current Ramping: Architectural Techniques to Reduce High-Frequency Inductive Noise
Vijaykumar, T. N.
being utilized by controlling instruction issue, trading off some energy and performance to control di no per- formance loss, and ramp down immediately after usage, with little energy loss. Our techniques-Frequency Inductive Noise Michael D. Powell and T. N. Vijaykumar School of Electrical and Computer Engineering Purdue
Pospichal, Todd
My creative process emerges from the struggle between two contrasting impulses: a habitual desire to control my internal and external environments, and an instinctive need to overcome these constraints. The discoveries I have made in the studio have...
Stabilizing feedback controls for quantum systems
Mazyar Mirrahimi; Ramon van Handel
No quantum measurement can give full information on the state of a quantum system; hence any quantum feedback control problem is neccessarily one with partial observations, and can generally be converted into a completely observed control problem for an appropriate quantum filter as in classical stochastic control theory. Here we study the properties of controlled quantum filtering equations as classical stochastic differential equations. We then develop methods, using a combination of geometric control and classical probabilistic techniques, for global feedback stabilization of a class of quantum filters around a particular eigenstate of the measurement operator.
Permeability enhancement using explosive techniques
Adams, T.F.; Schmidt, S.C.; Carter, W.J.
In situ recovery methods for many of our hydrocarbon and mineral resources depend on the ability to create or enhance permeability in the resource bed to allow uniform and predictable flow. To meet this need, a new branch of geomechanics devoted to computer prediction of explosive rock breakage and permeability enhancement has developed. The computer is used to solve the nonlinear equations of compressible flow, with the explosive behavior and constitutive properties of the medium providing the initial/boundary conditions and material response. Once the resulting computational tool has been verified and calibrated with appropriate large-scale field tests, it can be used to develop and optimize commercially useful explosive techniques for in situ resource recovery.
Subranging technique using superconducting technology
Gupta, Deepnarayan (Hawthorne, NY)
Subranging techniques using "digital SQUIDs" are used to design systems with large dynamic range, high resolution and large bandwidth. Analog-to-digital converters (ADCs) embodying the invention include a first SQUID based "coarse" resolution circuit and a second SQUID based "fine" resolution circuit to convert an analog input signal into "coarse" and "fine" digital signals for subsequent processing. In one embodiment, an ADC includes circuitry for supplying an analog input signal to an input coil having at least a first inductive section and a second inductive section. A first superconducting quantum interference device (SQUID) is coupled to the first inductive section and a second SQUID is coupled to the second inductive section. The first SQUID is designed to produce "coarse" (large amplitude, low resolution) output signals and the second SQUID is designed to produce "fine" (low amplitude, high resolution) output signals in response to the analog input signals.
Modeling techniques for simulating well behavior
Rattu, Bungen Christina
This thesis is a catalog of modeling techniques useful in simulating well behavior in certain types of reservoirs that are often encountered in petroleum reservoirs. Emphasis has been placed on techniques that can be used with any conventional...
Optimization Online - Efficient Algorithmic Techniques for Several ...
Mugurel Ionut Andreica
Oct 23, 2008 ... Efficient Algorithmic Techniques for Several Multidimensional Geometric Data Management and Analysis Problems. Mugurel Ionut�...
Johansson, Karl Henrik
CONTROL STRUCTURE DESIGN IN PROCESS CONTROL SYSTEMS Karl Henrik Johansson Department of EECS of Automatic Control Lund University, Sweden email@example.com Abstract: The control configuration problem industrial control problems. Copyright c 2000 IFAC 1. INTRODUCTION Autonomy in process control systems
Gust Load Alleviation for an Aeroelastic System Using Nonlinear Control�
Lucas, Amy Marie
structures. de Paiva et al.[14] investigated three nonlinear control methods to develop a global non- linear controller for an autonomous unmanned airship. They found that the backstep- ping technique, a Lyapunov-based nonlinear control, was a robust tool... that enabled them to simulate a representative ight test of a complete airship mission, including path tracking under turbulent wind conditions. Also, Suk et al.[15] used Lyapunov control theory and time-domain nite element analysis to control a slew maneuver...
ARPEFS as an analytic technique
Schach von Wittenau, A.E.
Two modifications to the ARPEFS technique are introduced. These are studied using p(2 {times} 2)S/Cu(001) as a model system. The first modification is the obtaining of ARPEFS {chi}(k) curves at temperatures as low as our equipment will permit. While adding to the difficulty of the experiment, this modification is shown to almost double the signal-to-noise ratio of normal emission p(2 {times} 2)S/Cu(001) {chi}(k) curves. This is shown by visual comparison of the raw data and by the improved precision of the extracted structural parameters. The second change is the replacement of manual fitting of the Fourier filtered {chi}(k) curves by the use of the simplex algorithm for parameter determination. Again using p(2 {times} 2)S/Cu(001) data, this is shown to result in better agreement between experimental {chi}(k) curves and curves calculated based on model structures. The improved ARPEFS is then applied to p(2 {times} 2)S/Ni(111) and ({radical}3 {times} {radical}3) R30{degree}S/Ni(111). For p(2 {times} 2)S/Cu(001) we find a S-Cu bond length of 2.26 {Angstrom}, with the S adatom 1.31 {Angstrom} above the fourfold hollow site. The second Cu layer appears to be corrugated. Analysis of the p(2 {times} 2)S/Ni(111) data indicates that the S adatom adatom adsorbs onto the FCC threefold hollow site 1.53 {Angstrom} above the Ni surface. The S-Ni bond length is determined to be 2.13 {Angstrom}, indicating an outwards shift of the first layer Ni atoms. We are unable to assign a unique structure to ({radical}3 {times} {radical}3)R30{degree}S/Ni(111). An analysis of the strengths and weaknesses of ARPEFS as an experimental and analytic technique is presented, along with a summary of problems still to be addressed.
Optimal Control of Quantum Measurement
Daniel J. Egger; Frank K. Wilhelm
Pulses to steer the time evolution of quantum systems can be designed with optimal control theory. In most cases it is the coherent processes that can be controlled and one optimizes the time evolution towards a target unitary process, sometimes also in the presence of non-controllable incoherent processes. Here we show how to extend the GRAPE algorithm in the case where the incoherent processes are controllable and the target time evolution is a non-unitary quantum channel. We perform a gradient search on a fidelity measure based on Choi matrices. We illustrate our algorithm by optimizing a phase qubit measurement pulse. We show how this technique can lead to large measurement contrast close to 99%. We also show, within the validity of our model, that this algorithm can produce short 1.4 ns pulses with 98.2% contrast.
Merchant, Michael E.; Robinson, James V.
Controlling Fleas Mike Merchant and James Robinson* F leas are small, wingless insects that feed on the blood of animals and people. Americans spend about $9 billion a year controlling fleas ? one of the biggest expenses for pet owners. In Texas... pet bedding regularly and vacuum thoroughly. Vacuuming removes up to 30 per- cent of the larvae and up to 60 percent of flea eggs from a carpet, as well as the larvae?s food supply of dried blood. Vacuum under furniture, cushions, chairs, beds...
Comparison of Holdup Measurement Techniques
Lousteau, Angela L [ORNL] [ORNL; Stooksbury, John C [ORNL] [ORNL; Cleveland, Steven L [ORNL] [ORNL
The measurement of uranium holdup, the residual material left in process equipment such as pipes or ducts, is an integral element of material control and accountability. Not only are the measurements important for accountability, they are also important for criticality safety. The goal in measuring holdup is to quantify the amount of material in the pipes to verify that all material is accounted for (inventory in [inventory out + holdup] = 0) and to ensure that the amount of material heldup is not a criticality risk. There are a number of ways to measure holdup in process equipment; however, this paper will evaluate only two methods (i.e., Holdup Measurement System 4 (HMS-4) and In Situ Object Counting Software (ISOCS)) for specific measurement scenarios. The comparison will use measurements of well-known reference materials in various configurations and will examine the results, uncertainties, repeatability, time required, portability, and cost of each system.
Controlling chaotic transport in a Hamiltonian model of interest to magnetized plasmas
Guido Ciraolo; Cristel Chandre; Ricardo Lima; Michel Vittot; Marco Pettini; Charles Figarella; Philippe Ghendrih
We present a technique to control chaos in Hamiltonian systems which are close to integrable. By adding a small and simple control term to the perturbation, the system becomes more regular than the original one. We apply this technique to a model that reproduces turbulent ExB drift and show numerically that the control is able to drastically reduce chaotic transport.
Analysis and Control of Non-Affine, Non-Standard, Singularly Perturbed Systems
Narang, Anshu
desired state-feedback control design technique. An example of sliding-mode control for linear systems was demonstrated by Heck [19]. The composite control technique proposed by Saberi and Khalil [20] extended the two-stage procedure for general class...
Gadgil, A.
on advanced passive cooling techniques. Systems Analysis andand fabrica- tion techniques. Cooling Systems Research. This
Controlling Structures | Open Energy Information
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, clickInformationNew| Exploration Technique: Controlled SourceControlling
A Current-Sensorless Digital Controller for Active Power Factor Correction Control Based on Kalman Filters
Kimball, Jonathan W.
A Current-Sensorless Digital Controller for Active Power Factor Correction Control Based on Kalman, by replacing the sensor with a Kalman filter, which is essentially a stochastic observer. Experimental results-power techniques are undesirable and the current sensor is too expensive. A Kalman filter [7] can be used
Control Account Manager (CAM) Responsibilities Control Account Manager (CAM) responsibilities are listed in the PPPL Project
Princeton Plasma Physics Laboratory
and define assumptions, risk, and uncertainty in the project � Assign an Earned Value Technique to resourceControl Account Manager (CAM) Responsibilities Control Account Manager (CAM) responsibilities are listed in the PPPL Project Management System Description (PMSD) and PMSD Appendix E Supporting
Advanced control strategies for heating, ventilation, air-conditioning, and refrigeration systems�An overview: Part I: Hard control
D. Subbaram Naidu; Craig G. Rieger
A chronological overview of the advanced control strategies for heating, ventilation, air-conditioning, and refrigeration (HVAC&R) is presented in this article. The overview focuses on hard-computing or control techniques, such as proportional-integral-derivative, optimal, nonlinear, adaptive, and robust; soft-computing or control techniques, such as neural networks, fuzzy logic, genetic algorithms; and on the fusion or hybrid of hard- and soft-control techniques. Thus, it is to be noted that the terminology �hard� and �soft� computing/control has nothing to do with the �hardware� and �software� that is being generally used. Part I of a two-part series focuses on hard-control strategies, and Part II focuses on softand fusion-control in addition to some future directions in HVAC&R research. This overview is not intended to be an exhaustive survey on this topic, and any omission of other works is purely unintentional.
ABET Course Syllabus Spring 2011 EC402 Control Systems Elective
Goldberg, Bennett
Schedule: LEC: 4 hrs/week (MW 4-6), LAB: (TBA) Textbooks: "Modern Control Systems", 12 th edition, by DorfABET Course Syllabus � Spring 2011 EC402 Control Systems Elective Spring 2011 Catalog Data-Hurwitz, root-locus, Bode, and Nyquist techniques. Design and compensation of feedback control systems. Course
An FPGA Architecture Supporting Dynamically Controlled Power Gating
Wilton, Steve
An FPGA Architecture Supporting Dynamically Controlled Power Gating Assem A. M. Bsoul 1 and Steven at reducing leakage power. However, previous techniques focus on statically- controlled power gating. In this paper, we propose a modification to the fabric of an FPGA that enables dynamically-controlled power
Power Control for Mobile Sensor Networks: An Experimental Approach
Amir, Yair
Power Control for Mobile Sensor Networks: An Experimental Approach JeongGil Ko Department--Techniques for controlling the transmission power of wireless mobile devices have been widely studied in ad-hoc and cellular characteristics of these networks, such as severe resource constraints, suggest that transmission power control
Ray, Indrakshi
USING PARAMETERIZED UML TO SPECIFY AND COMPOSE ACCESS CONTROL MODELS Indrakshi Ray, Na Li, Dae is to model the access control frameworks, compose the models, and analyze the resulting model to identify problems. In this pa- per we outline a technique for modeling and composing access control policy
A Set of Computer Aided Automatic Control Experiments
Erdem, Erkut
, dynamics, frequency response, and key techniques in the closed loop controller design such as PID, pole is highlighted together with the possibilities of implementing various models and controllers at differentA Set of Computer Aided Automatic Control Experiments for Undergraduate Students YUSUF BU GDAY
Stratigraphic statistical curvature analysis techniques
Bengtson, C.A.; Ziagos, J.P.
SCAT applies statistical techniques to dipmeter data to identify patterns of bulk curvature, determine transverse and longitudinal structural directions, and reconstruct cross sections and contour maps. STRAT-SCAT applies the same concepts to geometric interpretation of multistoried unimodal, bimodal, or trough-type cross-bedding and also to seismic stratigraphy-scale stratigraphic structures. Structural dip, which comprises the bulk of dipmeter data, is related to beds that (statistically) were deposited with horizontal attitudes; stratigraphic dip is related to beds that were deposited with preferentially oriented nonhorizontal attitudes or to beds that assumed such attitudes because of differential compaction. Stratigraphic dip generates local zones of departure from structural dip on special SCAT plots. The RMS (root-mean-square) of apparent structural dip is greatest in the (structural) T-direction and least in the perpendicular L-direction; the RMS of stratigraphic dip (measured with respect to structural dip) is greatest in the stratigraphic T*-direction and least in the stratigraphic L*-direction. Multistoried, cross-bedding appears on T*-plots as local zones of either greater scatter or statistically significant departure of stratigraphic median dip from structural dip. In contrast, the L*-plot (except for trough-type cross-bedding) is sensitive to cross-bedding. Seismic stratigraphy-scale depositional sequences are identified on Mercator dip versus azimuth plots and polar tangent plots as secondary cylindrical-fold patterns imposed on global structural patterns. Progradational sequences generate local cycloid-type patterns on T*-plots, and compactional sequences generate local cycloid-type patterns on T*-plots, and compactional sequences generate local half-cusp patterns. Both features, however, show only structural dip on L*-plots.
Improved LWR Cladding Performance by EPD Surface Modification Technique
Corradini, Michael; Sridharan, Kumar
This project will utilize the electro-phoretic deposition technique (EPD) in conjunction with nanofluids to deposit oxide coatings on prototypic zirconium alloy cladding surfaces. After demonstrating that this surface modification is reproducible and robust, the team will subject the modified surface to boiling and corrosion tests to characterize the improved nucleate boiling behavior and superior corrosion performance. The scope of work consists of the following three tasks: The first task will employ the EPD surface modification technique to coat the surface of a prototypic set of zirconium alloy cladding tube materials (e.g. Zircaloy and advanced alloys such as M5) with a micron-thick layer of zirconium oxide nanoparticles. The team will characterize the modified surface for uniformity using optical microscopy and scanning-electron microscopy, and for robustness using standard hardness measurements. After zirconium alloy cladding samples have been prepared and characterized using the EPD technique, the team will begin a set of boiling experiments to measure the heat transfer coefficient and critical heat flux (CHF) limit for each prepared sample and its control sample. This work will provide a relative comparison of the heat transfer performance for each alloy and the surface modification technique employed. As the boiling heat transfer experiments begin, the team will also begin corrosion tests for these zirconium alloy samples using a water corrosion test loop that can mimic light water reactor (LWR) operational environments. They will perform extended corrosion tests on the surface-modified zirconium alloy samples and control samples to examine the robustness of the modified surface, as well as the effect on surface oxidation
Some new methods of RF control
Jachim, S.P.
This presentation will focus on several recent developments at Los Alamos in the area of RF control for accelerators. Included in the discussion will be in-phase/quadrature (I/Q) field control, the application of six-port reflectometers for cavity instrumentation and resonance control, a technique for phase stabilization of critical RF cables, an application of state-variable feedback for field control, and the direct integration of RF and computer-interface hardware using the VXIbus standard. 25 refs., 8 figs.
Efficient Algorithmic Techniques for Several Multidimensional ...
Politehnica University of Bucharest, Romania, email@example.com. Abstract: In this paper I present several novel, efficient, algorithmic techniques for.
Computer vision techniques for underwater navigation
Barngrover, Christopher M.
DCS) Chapter 2 Computer Vision . . 2.1 Labeling . . . . 2.2OF CALIFORNIA, SAN DIEGO Computer Vision Techniques fordegree Master of Science in Computer Science by Christopher
Eddy current technique for predicting burst pressure
Petri, Mark C. (Yorkville, IL); Kupperman, David S. (Oak Park, IL); Morman, James A. (Woodridge, IL); Reifman, Jaques (Western Springs, IL); Wei, Thomas Y. C. (Downers Grove, IL)
A signal processing technique which correlates eddy current inspection data from a tube having a critical tubing defect with a range of predicted burst pressures for the tube is provided. The method can directly correlate the raw eddy current inspection data representing the critical tubing defect with the range of burst pressures using a regression technique, preferably an artificial neural network. Alternatively, the technique deconvolves the raw eddy current inspection data into a set of undistorted signals, each of which represents a separate defect of the tube. The undistorted defect signal which represents the critical tubing defect is related to a range of burst pressures utilizing a regression technique.
Optimization Online - Smoothing techniques for solving semidefinite ...
Michael B rgisser
Oct 5, 2009 ... Smoothing techniques for solving semidefinite programs with many constraints. Michael B rgisser(michael.buergisser ***at*** ifor.math.ethz.ch)
Powerful new technique simultaneously determines nanomaterials...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Powerful new technique simultaneously determines nanomaterials' chemical makeup, topography By Angela Hardin * December 2, 2014 Tweet EmailPrint ARGONNE, Ill. - A team of...
Uncertainty Quantification Techniques for Sensor Calibration...
Office of Scientific and Technical Information (OSTI)
Uncertainty Quantification Techniques for Sensor Calibration Monitoring in Nuclear Power Plants Re-direct Destination: This report describes research towards the development of...
Airborne electromagnetic surveys as a reconnaissance technique...
geothermal exploration Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Airborne electromagnetic surveys as a reconnaissance technique for...
Fundamentals and Techniques of Nonimaging
O'Gallagher, J. J.; Winston, R.
This is the final report describing a long term basic research program in nonimaging optics that has led to major advances in important areas, including solar energy, fiber optics, illumination techniques, light detectors, and a great many other applications. The term ''nonimaging optics'' refers to the optics of extended sources in systems for which image forming is not important, but effective and efficient collection, concentration, transport, and distribution of light energy is. Although some of the most widely known developments of the early concepts have been in the field of solar energy, a broad variety of other uses have emerged. Most important, under the auspices of this program in fundamental research in nonimaging optics established at the University of Chicago with support from the Office of Basic Energy Sciences at the Department of Energy, the field has become very dynamic, with new ideas and concepts continuing to develop, while applications of the early concepts continue to be pursued. While the subject began as part of classical geometrical optics, it has been extended subsequently to the wave optics domain. Particularly relevant to potential new research directions are recent developments in the formalism of statistical and wave optics, which may be important in understanding energy transport on the nanoscale. Nonimaging optics permits the design of optical systems that achieve the maximum possible concentration allowed by physical conservation laws. The earliest designs were constructed by optimizing the collection of the extreme rays from a source to the desired target: the so-called ''edge-ray'' principle. Later, new concentrator types were generated by placing reflectors along the flow lines of the ''vector flux'' emanating from lambertian emitters in various geometries. A few years ago, a new development occurred with the discovery that making the design edge-ray a functional of some other system parameter permits the construction of whole new classes of devices with greatly expanded capabilities compared to conventional approaches. These ''tailored edge-ray'' designs have dramatically broadened the range of geometries in which nonimaging optics can provide a significant performance improvement. Considerable progress continues to be made in furthering the incorporation of nonimaging secondaries into practical high concentration and ultra-high concentration solar collector systems. In parallel with the continuing development of nonimaging geometrical optics, our group has been working to develop an understanding of certain fundamental physical optics concepts in the same context. In particular, our study of the behavior of classical radiance in nonimaging systems, has revealed some fundamentally important new understandings that we have pursued both theoretically and experimentally. The field is still relatively new and is rapidly gaining widespread recognition because it fuels many industrial applications. Because of this, during the final years of the project, our group at Chicago has been working more closely with a team of industrial scientists from Science Applications International Corporation (SAIC) at first informally, and later more formally, beginning in 1998, under a formal program initiated by the Department of Energy and incrementally funded through this existing grant. This collaboration has been very fruitful and has led to new conceptual breakthroughs which have provided the foundation for further exciting growth. Many of these concepts are described in some detail in the report.
Emission control options for mine diesels
Waytulonis, R.W. (Bureau of Mines, Twin Cities, MN (USA). Twin Cities Research Center)
New exhaust control techniques and devices may be necessary to meet future diesel particulate matter emission standards in underground coal mines. This paper reviews conventional work practices and devices used to control diesel exhaust emissions, and new techniques being tested by the US Bureau of Mines. Discussions center on important work practices and on the function and efficiency of exhaust aftertreatment devices. An industry-government cooperative research project to develop and test an exhaust aftertreatment system for part 36 equipment is also discussed.
Finance & Administration Controller's Office
Weston, Ken
Finance & Administration Controller's Office April 2014 Michael Williams Controller Controller ICOFA 61318 Revised: 4/4/2014 #12;Finance & Administration Controller's Office Accounting & Asset Coordinator Property Surplus Sales 81269 Revised: 4/4/2014 #12;Finance & Administration Controller's Office
Results of NDE Technique Evaluation of Clad Hydrides
Dennis C. Kunerth
This report fulfills the M4 milestone, M4FT-14IN0805023, Results of NDE Technique Evaluation of Clad Hydrides, under Work Package Number FT-14IN080502. During service, zirconium alloy fuel cladding will degrade via corrosion/oxidation. Hydrogen, a byproduct of the oxidation process, will be absorbed into the cladding and eventually form hydrides due to low hydrogen solubility limits. The hydride phase is detrimental to the mechanical properties of the cladding and therefore it is important to be able to detect and characterize the presence of this constituent within the cladding. Presently, hydrides are evaluated using destructive examination. If nondestructive evaluation techniques can be used to detect and characterize the hydrides, the potential exists to significantly increase test sample coverage while reducing evaluation time and cost. To demonstrate the viability this approach, an initial evaluation of eddy current and ultrasonic techniques were performed to demonstrate the basic ability to these techniques to detect hydrides or their effects on the microstructure. Conventional continuous wave eddy current techniques were applied to zirconium based cladding test samples thermally processed with hydrogen gas to promote the absorption of hydrogen and subsequent formation of hydrides. The results of the evaluation demonstrate that eddy current inspection approaches have the potential to detect both the physical damage induced by hydrides, e.g. blisters and cracking, as well as the combined effects of absorbed hydrogen and hydride precipitates on the electrical properties of the zirconium alloy. Similarly, measurements of ultrasonic wave velocities indicate changes in the elastic properties resulting from the combined effects of absorbed hydrogen and hydride precipitates as well as changes in geometry in regions of severe degradation. However, for both approaches, the signal responses intended to make the desired measurement incorporate a number of contributing parameters. These contributing factors need to be recognized and a means to control them or separate their contributions will be required to obtain the desired information.
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron SpinPrincetonUsing Maps1 - USAFof EnergyVendorwinsVenue and Control
Innovative technologies for impurity control
Nygren, R.E. (ed.)
A brief discussion of the following topics is given in this report: Liquid Metal Divertors; Lithium Droplet Beam Divertor; Preferential Pumping of Helium; Reduced Erosion with Cu-Li, W-Li, etc.; Reduction of Erosion by Thermionic Emission; Reduced Erosion in Boronized Graphites; Proposal for Materials Experiments in TRIAM; Carbon-SiC for Plasma Facing Components; Helium Pumping with Palladium; Large Area Pump Limiter; Techniques for Enhanced Heat Removal; New Outlook on Gaseous Divertors; Gaseous Divertor Simulations; Impurity Seeding to Control ITER Particle and Heat Loads; Gaseous Divertor Experiments; Electrical Biasing to Control SOL Particle Fluxes; Biased Limiter in TEXTOR and Biased Divertor in PBX-M; Particle and Heat Flux Control Using Ponderomotive Forces; Helium Exhaust Using ICRF; Ergodic Magnetic Limiter Experiments in JFT-2M; and Helium Exhaust Using Fishbones.
Embrechts, Paul
QUANTITATIVE RISK MANAGEMENT: CONCEPTS, TECHNIQUES AND TOOLS* Paul Embrechts Department of Mathematics ETH Zurich www.math.ethz.ch/~embrechts #12;QUANTITATIVE RISK MANAGEMENT: CONCEPTS, TECHNIQUES Theorems of Quantitative Risk Management · PE's Desert-Island Copula · Example 1: Credit Risk · Example 2
A Flexible New Technique for Camera Calibration
Beauchemin, Steven S.
A Flexible New Technique for Camera Calibration Zhengyou Zhang, Senior Member, IEEE AbstractÐWe propose a flexible new technique to easily calibrate a camera. It only requires the camera to observe is available from the author's Web page. Index TermsÐCamera calibration, calibration from planes, 2D pattern
Opto-electrokinetic manipulation technique for highperformance
Kwon, Jae-Sung [Purdue University; Ravindranath, Sandeep [Purdue University; Kumar, Aloke [ORNL; Irudayaraj, Joseph [Purdue University; Wereley, Steven T. [Purdue University
This communication first demonstrates bio-compatibility of a recently developed opto-electrokinetic manipulation technique, using microorganisms. Aggregation, patterning, translation, trapping and size-based separation of microorganisms performed with the technique firmly establishes its usefulness for development of a high-performance on-chip bioassay system.
Optical on line techniques for nuclear applications
Doizi, D. [CEA, Nuclear Energy Div. DEN, DANS/DPC/SECR/LSRM (France); Pailloux, A.; Maury, C.; Sirven, J. B.; Dauvois, V.; Roujou, J. L.; Rosset, C. D. [CEA, Nuclear Energy Div. DEN, DANS/DPC (France); Hartmann, J. M. [CNRS., UMR 7583, LISA, Creteil (France)
Optical on line techniques enable non intrusive physical measurements in harsh environments (high temperature, high pressure, radioactivity, ...). Optical absorption spectrometries such as UV-Visible, FTIR, CRDS have been successfully used to study gas phase speciation in different nuclear applications. LIBS which relies on laser matter interactions is a on line optical technique for solids and liquids elementary analysis. (authors)
Kaehler, James A. (Littleton, CO)
An improvement in a system and method of controlling heliostat in which the heliostat is operable in azimuth and elevation by respective stepper motors and including the respective steps or means for calculating the position for the heliostat to be at a commanded position, determining the number of steps in azimuth and elevation for each respective motor to get to the commanded position and energizing both the azimuth and elevation stepper motors to run in parallel until predetermined number of steps away from the closest commanded position in azimuth and elevation so that the closest position has been achieved, and thereafter energizing only the remaining motor to bring it to its commanded position. In this way, the heliostat can be started from a stowed position in the morning and operated by a computer means to its commanded position and kept correctly oriented throughout the day using only the time of the day without requiring the usual sensors and feedback apparatus. A computer, or microprocessor, can then control a plurality of many heliostats easily and efficiently throughout the day.
Experimental control of chaos by variable and distributed delay feedback
Thomas J�ngling; Aleksandar Gjurchinovski; Viktor Urumov
We report on a significant improvement of the classical time-delayed feedback control method for stabilization of unstable periodic orbits or steady states. In an electronic circuit experiment we were able to realize time-varying and distributed delays in the control force leading to successful control for large parameter sets including large time delays. The presented technique makes advanced use of the natural torsion of the orbits, which is also necessary for the original control method to work.
Learning Multiple Models of Non-Linear Dynamics for Control under Varying Contexts�
Petkos, Georgios; Toussaint, Marc; Vijayakumar, Sethu
For stationary systems, efficient techniques for adaptive motor control exist which learn the system�s inverse dynamics online and use this single model for control. However, in realistic domains the system dynamics often ...
Victoria & Albert Museum- Medieval & Renaissance Galleries: A Passive Approach to Humidity Control
Lerpiniere, A.; Bingham, M.; Walker, S.
The new Medieval & Renaissance Galleries employ a passive approach to environmental control. The design exploits the massive nature of the building and uses sophisticated control techniques to minimise variations in humidity in the galleries...
Analysis of Energy Management System Control Philosophies Utilizing Collected Field Data
Russell, B. D.; Gerloff, G. W.; Heller; R. P.; Perry, L. W.
Small commercial and light industrial operations are turning to low-cost energy management controllers in efforts to reduce their electrical usage and demand. These controllers offer a variety of techniques to obtain this goal. To study the effects...
Fluid control structures in microfluidic devices
Mathies, Richard A. (Moraga, CA); Grover, William H. (Berkeley, CA); Skelley, Alison (Berkeley, CA); Lagally, Eric (Oakland, CA); Liu, Chung N. (Albany, CA)
Methods and apparatus for implementing microfluidic analysis devices are provided. A monolithic elastomer membrane associated with an integrated pneumatic manifold allows the placement and actuation of a variety of fluid control structures, such as structures for pumping, isolating, mixing, routing, merging, splitting, preparing, and storing volumes of fluid. The fluid control structures can be used to implement a variety of sample introduction, preparation, processing, and storage techniques.
US Department of Energy Radiological Control Manual
Not Available
This manual establishes practices for the conduct of radiological control activities. The Manual states DOE`s positions and views on the best courses of action currently available in the area of radiological controls. Accordingly, the provisions in the Manual should be viewed by contractors as an acceptable technique, method or solution for fulfilling their duties and responsibilities. This Manual shall be used by DOE in evaluating the performance of its contractors. (VC)
US Department of Energy Radiological Control Manual
Not Available
This manual establishes practices for the conduct of radiological control activities. The Manual states DOE's positions and views on the best courses of action currently available in the area of radiological controls. Accordingly, the provisions in the Manual should be viewed by contractors as an acceptable technique, method or solution for fulfilling their duties and responsibilities. This Manual shall be used by DOE in evaluating the performance of its contractors. (VC)
Maximizing Combustion Efficiency Through Selection of Optimum CO Control Levels
McGowan, G. F.; Ketchum, R. L.
With the increased emphasis on improved combustion control and the availability of accurate and reliable multi-parameter combustion instrumentation, an analytical technique is needed to supplant the previous incomplete assumptions and misleading...
Active Humidity Control Through Gas-Fired Desiccant Humidity Pump
Novosel, D.; Griffiths, W. C.
High equipment first cost and high operating costs, if electricity is used to drive such a system, have prohibited the application of active humidity control equipment in comfort conditioning in the past. Instead, passive techniques have been...
Microprocessor-Based Controllers Enhance Process Control
Hall, G. F.
-pIus-integral-plus derivative (PID) control with more sophisticated control strategies intended to increase energy efficiency, unit throughput, and/or product yield. Process computers provided the first efficient, cost-effective means of implementing advanced control. However...
Thermal Control & System Integration
Broader source: Energy.gov [DOE]
The thermal control and system integration activity focuses on issues such as the integration of motor and power control technologies and the development of advanced thermal control technologies....
Superhydrophobic Materials Technology-PVC Bonding Techniques
Hunter, Scott R. [Oak Ridge National Laboratory; Efird, Marty [VeloxFlow, LLC
The purpose of the technology maturation project was to develop an enhanced application technique for applying diatomaceous earth with pinned polysiloxane oil to PVC pipes and materials. The oil infiltration technique is applied as a spray of diluted oil in a solvent onto the superhydrophobic diatomaceous earth substrate. This makes the surface take on the following characteristics: � wet?cleanable � anti?biofouling � waterproof � anti?corrosion. The project involved obtaining input and supplies from VeloxFlow and the development of successful techniques that would quickly result in a commercial license agreement with VeloxFlow and other companies that use PVC materials in a variety of other fields of use.
Soft X-ray techniques to study mesoscale magnetism
Kortright, Jeffrey B.
X-Ray Techniques to Study Mesoscale Magnetism Jeffrey B.X-Ray Techniques to Study Mesoscale Magnetism Jeffrey B.
Real-Time SCADA Cyber Protection Using Compression Techniques
Lyle G. Roybal; Gordon H Rueff
The Department of Energy�s Office of Electricity Delivery and Energy Reliability (DOE-OE) has a critical mission to secure the energy infrastructure from cyber attack. Through DOE-OE�s Cybersecurity for Energy Delivery Systems (CEDS) program, the Idaho National Laboratory (INL) has developed a method to detect malicious traffic on Supervisory, Control, and Data Acquisition (SCADA) network using a data compression technique. SCADA network traffic is often repetitive with only minor differences between packets. Research performed at the INL showed that SCADA network traffic has traits desirable for using compression analysis to identify abnormal network traffic. An open source implementation of a Lempel-Ziv-Welch (LZW) lossless data compression algorithm was used to compress and analyze surrogate SCADA traffic. Infected SCADA traffic was found to have statistically significant differences in compression when compared against normal SCADA traffic at the packet level. The initial analyses and results are clearly able to identify malicious network traffic from normal traffic at the packet level with a very high confidence level across multiple ports and traffic streams. Statistical differentiation between infected and normal traffic level was possible using a modified data compression technique at the 99% probability level for all data analyzed. However, the conditions tested were rather limited in scope and need to be expanded into more realistic simulations of hacking events using techniques and approaches that are better representative of a real-world attack on a SCADA system. Nonetheless, the use of compression techniques to identify malicious traffic on SCADA networks in real time appears to have significant merit for infrastructure protection.
Advanced Computer Control Concepts Facilitate Energy Recovery
Cutler, C. R.
Matrix Control that has been used successfully by Shell for several years. A brief description of the technique will be given and an illustration of its feed forward capabilities to compensate for load and soot blowing disturbances on a complex furnace...
Hall, Christopher D.
compensation of an under-actuated system and coupled attitude control and energy storage techniques. Formation. INTRODUCTION Complex space systems are often both high-visibility and high-risk. However, programs that email@example.com 1 #12;custom hardware and software we have developed. The body of the paper presents information
Method for automatically evaluating a transition from a batch manufacturing technique to a lean manufacturing technique
Ivezic, Nenad; Potok, Thomas E.
A method for automatically evaluating a manufacturing technique comprises the steps of: receiving from a user manufacturing process step parameters characterizing a manufacturing process; accepting from the user a selection for an analysis of a particular lean manufacturing technique; automatically compiling process step data for each process step in the manufacturing process; automatically calculating process metrics from a summation of the compiled process step data for each process step; and, presenting the automatically calculated process metrics to the user. A method for evaluating a transition from a batch manufacturing technique to a lean manufacturing technique can comprise the steps of: collecting manufacturing process step characterization parameters; selecting a lean manufacturing technique for analysis; communicating the selected lean manufacturing technique and the manufacturing process step characterization parameters to an automatic manufacturing technique evaluation engine having a mathematical model for generating manufacturing technique evaluation data; and, using the lean manufacturing technique evaluation data to determine whether to transition from an existing manufacturing technique to the selected lean manufacturing technique.
Continuous flow separation techniques for microchemical synthesis
Kralj, Jason G
Performing multistep microchemical synthesis requires many techniques from combining micromixers in series to the development of continuous microfluidic separation tools. Safety, high heat and mass transfer rates, and cost ...
Review of Building Energy Saving Techniques
Zeng, X.; Zhu, D.
The pace of building energy saving in our country is late, compared with developed countries, and the consumption of building energy is much higher. Therefore, it is imperative to open up new building energy saving techniques and heighten energy use...
Techniques for green radio cellular communications�
Videv, Stefan
This thesis proposes four novel techniques to solve the problem of growing energy consumption requirements in cellular communication networks. The first and second part of this work propose a novel energy efficient ...
Techniques for enhanced physical-layer security
Pinto, Pedro C.
Information-theoretic security--widely accepted as the strictest notion of security--relies on channel coding techniques that exploit the inherent randomness of propagation channels to strengthen the security of communications ...
Wavelet Domain Based Techniques for Video Coding
Kutil, Rade
Wavelet Domain Based Techniques for Video Coding Dissertation zur Erlangung des Doktorgrades an der . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.4.3 Error Resilience . . . . . . . . . . . . . . . . . . . . . . . . 17 3 Wavelet Transform 18 3.1 Wavelet Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.1.1 Fourier Transform (FT
Mechanical property measurement by indentation techniques
Janakiraman, Balasubramanian
optic sensing technique is developed. An incident light beam from a semiconductor laser is coupled back into an optical fiber upon reflection from the metal surface. By measuring the diffused light power reflected from the metal surface, the diameter...
A laser speckle based position sensing technique
Shilpiekandula, Vijay, 1979-
This thesis presents the design and development of a novel laser-speckle-based position sensing technique. In our prototype implementation, a He-Ne laser beam is directed at the surface of an air-bearing spindle. An imaging ...
Laser technique detects pollutants in fish
Krause, C.
Using a laser and a mass spectrometer, trace pollutants can be detected in fish scales and the time and place of exposure can be determined. The technique has been demonstrated using striped bass from the Clinch and Tennessee rivers.
Review of Building Energy Saving Techniques�
Zeng, X.; Zhu, D.
The pace of building energy saving in our country is late, compared with developed countries, and the consumption of building energy is much higher. Therefore, it is imperative to open up new building energy saving techniques and heighten energy use...
Internal Benchmarking Outreach and Data Collection Techniques
Broader source: Energy.gov [DOE]
U.S. Department of Energy (DOE) Technical Assistance Program (TAP) presentation at a TAP webinar held on April 11, 2013 and dealing with internal benchmarking outreach and data collection techniques.
New fluorescence techniques for detecting noble gases
Whitaker, T.J.; Cannon, B.D.; Bushaw, B.A.
Two new concepts for detecting noble gases are reported. Both techniques involve formation of the long-lived 1s/sup 5/ metastable state of noble gases. The first technique utilizes the photon-burst method and should be capable of isotopically selective detection at extremely small relative abundances. The second concept incorporates a shelving technique that stores noble gas atoms in the metastable state and then pumps these atoms to a higher excited state that radiatively cascades to the ground state, emitting vacuum ultraviolet (vuv) photons. A significant advantage is that AlGaAs diode lasers can be used for the techniques rather than continuous wave cw dye lasers. 5 refs., 1 fig.
Mechanical property measurement by indentation techniques�
Janakiraman, Balasubramanian
optic sensing technique is developed. An incident light beam from a semiconductor laser is coupled back into an optical fiber upon reflection from the metal surface. By measuring the diffused light power reflected from the metal surface, the diameter...
Progress in Implementing and Testing State-Space Controls for the Controls Advanced Research Turbine: Preprint
Wright, A. D.; Fingersh, L. J.; Stol, K. A.
Designing wind turbines with maximum energy production and longevity for minimal cost is a major goal of the federal wind program and the wind industry. Control can improve the performance of wind turbines by enhancing energy capture and reducing dynamic loads. At the National Renewable Energy Laboratory (NREL) we are designing state-space control algorithms for turbine speed regulation and load reduction and testing them on the Controls Advanced Research Turbine (CART). The CART is a test-bed especially designed to test advanced control algorithms on a two-bladed teetering hub upwind turbine. In this paper we briefly describe the design of control systems to regulate turbine speed in region 3 for the CART. These controls use rotor collective pitch to regulate speed and also enhance damping in the 1st drive-train torsion, 1st rotor symmetric flap mode, and the 1st tower fore-aft mode. We designed these controls using linear optimal control techniques using state estimation based on limited turbine measurements such as generator speed and tower fore-aft bending moment. In this paper, we describe the issues and steps involved with implementing and testing these controls on the CART, and we show simulated tests to quantify controller performance. We then present preliminary results after implementing and testing these controls on the CART. We compare results from these controls to field test results from a baseline Proportional Integral control system. Finally we report conclusions to this work and outline future studies.
ChE 761 -Multivariate, Stochastic and Adaptive Control of Chemical Processes Instructor
Thompson, Michael
. � Reference texts: Linear Systems and Optimal Control, Chui and Chen, Springer Verlag, 1989. Wiley, 1972 and analysis (Lyapunov techniques) 2. Linear Systems Linear feedback control (Pole placement) Optimal Control Predictive Control (feasibility, stability, optimality) Linear Systems with uncertainty LQG designs Robust
SIAM J. CONTROL and OPTIMIZATION Vol. 31, No. 5, pp. 1245-1266, September 1993
Sontag, Eduardo
of sym- bolic processing. Classical control techniques, especially for linear systems, have proved for the resulting models. Successful approaches will eventually allow the interplay of modern control theory into areas such as discrete-event systems, supervisory control, and, more generally, "intelligent control
Analysis of an Up/Down Power Control Algorithm for the CDMA Reverse Link under Fading #
Mandayam, Narayan
derive a stochastic nonlinear feedback con� trol system model for the power controlled reverse link and study the power control performance based on the nonlinear model using the technique of statistical, Nonlinear Control, CDMA. 1 Introduction Power control is essential in CDMA systems to provide satisfactory
Cascade Training Technique for Particle Identification
Yong Liu; Ion Stancu
The cascade training technique which was developed during our work on the MiniBooNE particle identification has been found to be a very efficient way to improve the selection performance, especially when very low background contamination levels are desired. The detailed description of this technique is presented here based on the MiniBooNE detector Monte Carlo simulations, using both artifical neural networks and boosted decision trees as examples.
Data Capture Technique for High Speed Signaling
Barrett, Wayne Melvin (Rochester, MN); Chen, Dong (Croton On Hudson, NY); Coteus, Paul William (Yorktwon Heights, NY); Gara, Alan Gene (Mount Kisco, NY); Jackson, Rory (Eastchester, NY); Kopcsay, Gerard Vincent (Yorktown Hieghts, NY); Nathanson, Ben Jesse (Teaneck, NY); Vranas, Paylos Michael (Bedford Hills, NY); Takken, Todd E. (Brewster, NY)
A data capture technique for high speed signaling to allow for optimal sampling of an asynchronous data stream. This technique allows for extremely high data rates and does not require that a clock be sent with the data as is done in source synchronous systems. The present invention also provides a hardware mechanism for automatically adjusting transmission delays for optimal two-bit simultaneous bi-directional (SiBiDi) signaling.
Lidar techniques for search and rescue
Cabral, W.L.
Four techniques for using LIDAR in Search and Rescue Operations will be discussed. The topic will include laser retroreflection, laser-induced fluorescence in the visible, laser-induced fluorescence during daylight hours, and laser-induced fluorescence in the uv. These techniques use high-repetition rate lasers at a variety of frequencies to induce either fluorescence in dye markers or retroreflection from plastic corner cubes on life preservers and other emergency markers.
Finance & Administration Controller's Office
McQuade, D. Tyler
Finance & Administration Controller's Office July 2014 Michael Williams Controller Controller Administrative Services 51111 Catherine Hebert Program Director ICOFA 61318 Revised: 7/28/2014 #12;Finance Surplus Property 81269 Revised: 7/28/2014 #12;Finance & Administration Controller's Office Disbursement
TESEC 2001, Genova, Italy ADVANCED TECHNIQUES FOR SAFETY ANALYSIS APPLIED TO
Tronci, Enrico
TESEC 2001, Genova, Italy 1 ADVANCED TECHNIQUES FOR SAFETY ANALYSIS APPLIED TO THE GAS TURBINE for safety analysis of complex computer based systems. Such approaches are applied to the gas turbine control and electrical power supply of the centre of ENEA CR Casaccia. The plant is based on a small gas turbine and has
Adaptive Anisotropic Mesh Technique For Coupled Problems: Application To Welding Simulation
Paris-Sud XI, Universit� de
Adaptive Anisotropic Mesh Technique For Coupled Problems: Application To Welding Simulation M, such as welding for instance, is the control of the mesh, that is an appropriate mastering of the spatial welding. We demonstrate that the use of an anisotropic adaptive finite element method can result
PDE Estimation Techniques for Advanced Battery Management Systems -Part I: SOC Estimation
Krstic, Miroslav
- cles and renewable energy resources is battery energy storage. Advanced battery systems representPDE Estimation Techniques for Advanced Battery Management Systems - Part I: SOC Estimation S. J sensing and actuation exists to monitor and control the internal state of these systems. As such, battery
PDE Estimation Techniques for Advanced Battery Management Systems -Part II: SOH Identification
Krstic, Miroslav
vehi- cles and renewable energy resources is battery energy storage. Advanced battery systems representPDE Estimation Techniques for Advanced Battery Management Systems - Part II: SOH Identification S sensing and actuation exists to monitor and control the internal state of these systems. As such, battery
Nanostructured Titania-Polymer Photovoltaic Devices Made Using PFPE-Based Nanomolding Techniques
McGehee, Michael
Nanostructured Titania-Polymer Photovoltaic Devices Made Using PFPE-Based Nanomolding Techniques heterojunction photovoltaic (PV) cells using a perfluoropolyether (PFPE) elastomeric mold to control the donor photovoltaic materials because they are strong light absorbers and solution pro- cessable and can be deposited
Comparison of Travel Techniques in a Complex, Multi-Level 3D Environment
Lindeman, Robert W.
efficient exploration than common virtual travel techniques. While there was a consistent trend of better components: motor and cognitive [1]. The motor component, known as travel, refers to the movement, such as architecture walkthroughs and games, use a first person perspective [2]. In these systems, control of view
Isotopically controlled semiconductors
Haller, Eugene E.
16 Isotopically Controlled Semiconductors Eugene E. Hallerof isotopically engineered semiconductors; for outstandingisotopically controlled semiconductor crystals. This article
Comparison of soft computing techniques for a three-phase oil field centrifuge.
Smith, R. E. (Ronald E.); Parkinson, w; Miller, N. (Neal)
In this work we compare fuzzy techniques to neural network techniques for building a soft sensor for a three-phase oil field centrifuge. The soft sensor is used in a feed-forward control system that augments a feedback control system. Two approaches were used to develop the soft sensor. The first approach was to use a fuzzy rule based system based upon the experience of an expert operator. The expert operator's experience was supplemented using a computer model of the system. The second approach was to use a neural network to build the inverse of the computer model. The pros and cons of both techniques are discussed. KEYWORDS: fuzzy logic, neural networks, soft sensor, soft computing
Pázsit, Imre
REACTOR OPERATIONS AND CONTROL KEYWORDS: core calculations, neural networks, control rod elevation of a control rod, or a group of control rods, is an important parameter from the viewpoint of reactor control DETERMINATION OF PWR CONTROL ROD POSITION BY CORE PHYSICS AND NEURAL NETWORK METHODS NINOS S. GARIS* and IMRE
Quantum Internal Model Principle: Decoherence Control
Narayan Ganesan; Tzyh-Jong Tarn
In this article, we study the problem of designing a Decoherence Control for quantum systems with the help of a scalable ancillary quantum control and techniques from geometric control theory, in order to successfully and completely decouple an open quantum system from its environment. We re-formulate the problem of decoherence control as a disturbance rejection scheme which also leads us to the idea of Internal Model Principle for quantum control systems which is first of its kind in the literature. It is shown that decoupling a quantum disturbance from an open quantum system, is possible only with the help of a quantum controller which takes into account the model of the environmental interaction. This is demonstrated for a simple 2-qubit system wherein the effects of decoherence are completely eliminated. The theory provides conditions to be imposed on the controller to ensure perfect decoupling. Hence the problem of decoherence control naturally gives rise to the quantum internal model principle which relates the disturbance rejecting control to the model of the environmental interaction. Classical internal model principle and disturbance decoupling focus on different aspects viz. perfect output tracking and complete decoupling of output from external disturbances respectively. However for quantum systems, the two problems come together and merge in order to produce an effective platform for decoherence control. In this article we introduce a seminal connection between disturbance decoupling and the corresponding analog for internal model principle for quantum systems.
1120 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 25, NO. 5, MAY 2010 Digital Sliding-Mode Controller For High-Frequency DC/DC SMPS
Paris-Sud XI, Universit� de
-frequency switching-mode power supply (SMPS), sliding-mode (SM) control. I. INTRODUCTION DIGITAL control technique has-performance control algorithms. Most existing digital controller for high-frequency (in mega- hertz range) and low-power limitations to control low-power high-frequency SMPS. Analog controllers are sensitive to analog component
Injection-controlled laser resonator
Chang, J.J.
A new injection-controlled laser resonator incorporates self-filtering and self-imaging characteristics with an efficient injection scheme. A low-divergence laser signal is injected into the resonator, which enables the injection signal to be converted to the desired resonator modes before the main laser pulse starts. This injection technique and resonator design enable the laser cavity to improve the quality of the injection signal through self-filtering before the main laser pulse starts. The self-imaging property of the present resonator reduces the cavity induced diffraction effects and, in turn, improves the laser beam quality. 5 figs.
Spatial xenon oscillation control with expert systems
Alten, S. (Turkish Atomic Energy Authority, Ankara (Turkey)); Danofsky, R.A. (Iowa State Univ., Ames, IA (United States))
Spatial power oscillations were attributed to the xenon transients in a reactor core in 1958 by Randall and St. John. These transients are usually initiated by a local reactivity insertion and lead to divergent axial flux oscillations in the core at constant power. Several heuristic manual control strategies and automatic control methods were developed to damp the xenon oscillations at constant power operations. However, after the load-follow operation of the reactors became a necessity of life, a need for better control strategies arose. Even though various advanced control strategies were applied to solve the xenon oscillation control problem for the load-follow operation, the complexity of the system created difficulties in modeling. The strong nonlinearity of the problem requires highly sophisticated analytical approaches that are quite inept for numerical solutions. On the other hand, the complexity of a system and heuristic nature of the solutions are the basic reasons for using artificial intelligence techniques such as expert systems.
Incoherent Control of Locally Controllable Quantum Systems
Daoyi Dong; Chenbin Zhang; Herschel Rabitz; Alexander Pechen; Tzyh-Jong Tarn
An incoherent control scheme for state control of locally controllable quantum systems is proposed. This scheme includes three steps: (1) amplitude amplification of the initial state by a suitable unitary transformation, (2) projective measurement on the amplified state, and (3) final optimization by a unitary controlled transformation. The first step increases the amplitudes of some desired eigenstates and the corresponding probability of observing these eigenstates, the second step projects, with high probability, the amplified state into a desired eigenstate, and the last step steers this eigenstate into the target state. Within this scheme, two control algorithms are presented for two classes of quantum systems. As an example, the incoherent control scheme is applied to the control of a hydrogen atom by an external field. The results support the suggestion that projective measurements can serve as an effective control and local controllability information can be used to design control laws for quantum systems. Thus, this scheme establishes a subtle connection between control design and controllability analysis of quantum systems and provides an effective engineering approach for controlling quantum systems with partial controllability information.
Fusion blanket design and optimization techniques.
Gohar, Y.
In fusion reactors, the blanket design and its characteristics have a major impact on the reactor performance, size, and economics. The selection and arrangement of the blanket materials, dimensions of the different blanket zones, and different requirements of the selected materials for a satisfactory performance are the main parameters, which define the blanket performance. These parameters translate to a large number of variables and design constraints, which need to be simultaneously considered in the blanket design process. This represents a major design challenge because of the lack of a comprehensive design tool capable of considering all these variables to define the optimum blanket design and satisfying all the design constraints for the adopted figure of merit and the blanket design criteria. The blanket design techniques of the First Wall/Blanket/Shield Design and Optimization System (BSDOS) have been developed to overcome this difficulty and to provide the state-of-the-art techniques and tools for performing blanket design and analysis. This report describes some of the BSDOS techniques and demonstrates its use. In addition, the use of the optimization technique of the BSDOS can result in a significant blanket performance enhancement and cost saving for the reactor design under consideration. In this report, examples are presented, which utilize an earlier version of the ITER solid breeder blanket design and a high power density self-cooled lithium blanket design for demonstrating some of the BSDOS blanket design techniques.
Micro-fabrication Techniques for Target Components
Miles, R; Hamilton, J; Crawford, J; Ratti, S; Trevino, J; Graff, T; Stockton, C; Harvey, C
Micro-fabrication techniques, derived from the semi-conductor industry, can be used to make a variety of useful mechanical components for targets. A selection of these components including supporting cooling arms for prototype cryogenic inertial confinement fusion targets, stepped and graded density targets for materials dynamics experiments are described. Micro-fabrication enables cost-effective, simultaneous fabrication of multiple high-precision components with complex geometries. Micro-fabrication techniques such as thin-film deposition, photo-lithographic patterning and etch processes normally used in the semi-conductor manufacture industry, can be exploited to make useful mechanical target components. Micro-fabrication processes have in recent years been used to create a number of micro-electro-mechanical systems (MEMS) components such as pressure sensors, accelerometers, ink jet printer heads, microfluidics platforms and the like. These techniques consist primarily of deposition of thin films of material, photo-lithographic patterning and etching processes performed sequentially to produce three dimensional structures using essentially planar processes. While the planar technology can be limiting in terms of the possible geometries of the final product, advantages of using these techniques include the ability to make multiple complex structures simultaneously and cost-effectively. Target components fabricated using these techniques include the supporting cooling arms for cryogenic prototype fusion ignition targets, stepped targets for equation-of-state experiments, and graded density reservoirs for material strength experiments.
Title of Dissertation: CONTROL AND TRANSPORT OF INTENSE ELECTRON BEAMS
Anlage, Steven
ABSTRACT Title of Dissertation: CONTROL AND TRANSPORT OF INTENSE ELECTRON BEAMS Hui Li, Doctor of Philosophy, 2004 Dissertation Directed By: Professor, Patrick G. O'Shea Department of Electrical and Computer throughout the strong focusing lattice. We describe in this dissertation the main beam control techniques
Haviland, David
ACCELERATORS FOR PHYSICS EXPERIMENTS: FROM DIAGNOSTICS AND CONTROL TO DESIGN Elena Wildner high-energy physics laboratory in the world. Here, a number of particle accelerators are connected;Abstract This thesis develops techniques of control-methods, optimization, and diagnostics of accelerator
Decentralized local approach for lateral control of platoons Jano YAZBECK
Boyer, Edmond
of the vehicles. On the other side, a decentralized control is more robust as each vehicle is autonomous deals with platooning problem that aims to steer a train of vehicles along a trajectory. Many techniques control requires communication between vehicles: any data loss may prevent the correct behavior
Restoration strategy for power distribution networks using optimal supervisory control
Lim, Jong-Tae
the supervisory control technique to a line-restoration problem aiming to increase the steady-state security level of lines and transformers and the bus voltage for the security assessment. 2 Preliminary The supervisoryRestoration strategy for power distribution networks using optimal supervisory control M.-S. Lee
Nonlineai Control of Biotechnological Processes with Growth-Production Decoupling
Bastin, Georges
, for instance, to substrate overload- ing. Typical examples involve biological wastewater treatment processes Nonlinear control design techniques for a class of continuous biological processes with growth growth and the product formation. The issue of feedback linearizing control of biological reactors has
Toward automated beam optics control
Silbar, R.R.; Schultz, D.E.
We have begun a program aiming toward automatic control of charged-particle beam optics using artificial intelligence programming techniques. In developing our prototype, we are working with LISP machines and the KEE expert system shell. Our first goal was to develop a ''mouseable'' representation of a typical beam line. This responds actively to changes entered from the mouse or keyboard, giving an updated display of the beam line itself, its optical properties, and the instrumentation and control devices as seen by the operater. We have incorporated TRANSPORT, written in Fortran but running as a callable procedure in the LISP environment, for simulation of the beam-line optics. This paper describes the experience gained in meeting our first goal and discusses plans to extend the work so that it is usable, in realtime, on an operating beam line. 11 refs.
Weld penetration and defect control
Chin, B.A.
Highly engineered designs increasingly require the use of improved materials and sophisticated manufacturing techniques. To obtain optimal performance from these engineered products, improved weld properties and joint reliability are a necessarily. This requirement for improved weld performance and reliability has led to the development of high-performance welding systems in which pre-programmed parameters are specified before any welding takes place. These automated systems however lack the ability to compensate for perturbations which arise during the welding process. Hence the need for systems which monitor and control the in-process status of the welding process. This report discusses work carried out on weld penetration indicators and the feasibility of using these indicators for on-line penetration control.
Customer Data Clustering using Data Mining Technique
Rajagopal, Dr Sankar
Classification and patterns extraction from customer data is very important for business support and decision making. Timely identification of newly emerging trends is very important in business process. Large companies are having huge volume of data but starving for knowledge. To overcome the organization current issue, the new breed of technique is required that has intelligence and capability to solve the knowledge scarcity and the technique is called Data mining. The objectives of this paper are to identify the high-profit, high-value and low-risk customers by one of the data mining technique - customer clustering. In the first phase, cleansing the data and developed the patterns via demographic clustering algorithm using IBM I-Miner. In the second phase, profiling the data, develop the clusters and identify the high-value low-risk customers. This cluster typically represents the 10-20 percent of customers which yields 80% of the revenue.
Advanced Techniques for Power System Identification from Measured Data
Pierre, John W.; Wies, Richard; Trudnowski, Daniel
Time-synchronized measurements provide rich information for estimating a power-system's electromechanical modal properties via advanced signal processing. This information is becoming critical for the improved operational reliability of interconnected grids. A given mode's properties are described by its frequency, damping, and shape. Modal frequencies and damping are useful indicators of power-system stress, usually declining with increased load or reduced grid capacity. Mode shape provides critical information for operational control actions. This project investigated many advanced techniques for power system identification from measured data focusing on mode frequency and damping ratio estimation. Investigators from the three universities coordinated their effort with Pacific Northwest National Laboratory (PNNL). Significant progress was made on developing appropriate techniques for system identification with confidence intervals and testing those techniques on field measured data and through simulation. Experimental data from the western area power system was provided by PNNL and Bonneville Power Administration (BPA) for both ambient conditions and for signal injection tests. Three large-scale tests were conducted for the western area in 2005 and 2006. Measured field PMU (Phasor Measurement Unit) data was provided to the three universities. A 19-machine simulation model was enhanced for testing the system identification algorithms. Extensive simulations were run with this model to test the performance of the algorithms. University of Wyoming researchers participated in four primary activities: (1) Block and adaptive processing techniques for mode estimation from ambient signals and probing signals, (2) confidence interval estimation, (3) probing signal design and injection method analysis, and (4) performance assessment and validation from simulated and field measured data. Subspace based methods have been use to improve previous results from block processing techniques. Bootstrap techniques have been developed to estimate confidence intervals for the electromechanical modes from field measured data. Results were obtained using injected signal data provided by BPA. A new probing signal was designed that puts more strength into the signal for a given maximum peak to peak swing. Further simulations were conducted on a model based on measured data and with the modifications of the 19-machine simulation model. Montana Tech researchers participated in two primary activities: (1) continued development of the 19-machine simulation test system to include a DC line; and (2) extensive simulation analysis of the various system identification algorithms and bootstrap techniques using the 19 machine model. Researchers at the University of Alaska-Fairbanks focused on the development and testing of adaptive filter algorithms for mode estimation using data generated from simulation models and on data provided in collaboration with BPA and PNNL. There efforts consist of pre-processing field data, testing and refining adaptive filter techniques (specifically the Least Mean Squares (LMS), the Adaptive Step-size LMS (ASLMS), and Error Tracking (ET) algorithms). They also improved convergence of the adaptive algorithms by using an initial estimate from block processing AR method to initialize the weight vector for LMS. Extensive testing was performed on simulated data from the 19 machine model. This project was also extensively involved in the WECC (Western Electricity Coordinating Council) system wide tests carried out in 2005 and 2006. These tests involved injecting known probing signals into the western power grid. One of the primary goals of these tests was the reliable estimation of electromechanical mode properties from measured PMU data. Applied to the system were three types of probing inputs: (1) activation of the Chief Joseph Dynamic Brake, (2) mid-level probing at the Pacific DC Intertie (PDCI), and (3) low-level probing on the PDCI. The Chief Joseph Dynamic Brake is a 1400 MW disturbance to the system and is injected for a ha
SUBMITTED TO THE INTERNATIONAL JOURNAL OF FLOW CONTROL, REVISED VERSION 1 Fluid Flow Control: a Vision-Based Approach
Paris-Sud XI, Universit� de
SUBMITTED TO THE INTERNATIONAL JOURNAL OF FLOW CONTROL, REVISED VERSION 1 Fluid Flow Control, by visualizing a fluid flow, dense flow velocity maps can be computed via optical flow techniques by diminishing the fuel consumption of their aircrafts through drag reduction [1]. In contrast, in other
Technique for Measuring Hybrid Electronic Component Reliability
Green, C.C.; Hernandez, C.L.; Hosking, F.M.; Robinson, D.; Rutherford, B.; Uribe, F.
Materials compatibility studies of aged, engineered materials and hardware are critical to understanding and predicting component reliability, particularly for systems with extended stockpile life requirements. Nondestructive testing capabilities for component reliability would significantly enhance lifetime predictions. For example, if the detection of crack propagation through a solder joint can be demonstrated, this technique could be used to develop baseline information to statistically determine solder joint lifelengths. This report will investigate high frequency signal response techniques for nondestructively evaluating the electrical behavior of thick film hybrid transmission lines.
Advanced crystallization techniques of ''solar grade'' silicon
Gasparini, M.; Alessandri, M.; Calligarich, C.; Pizzini, S.; Rava, P.; Redaelli, F.; Sardi, L.
Microstructural, electrical and photovoltaic characteristics of polycristalline silicon solar cells fabricated with silicon ingots containing 5, 100 and 500 ppmw iron are reported and discussed. All silicon ingots were grown by the directional solidification technique in graphite or special quartz molds and doped intentionally with iron, in order to evaluate the potentiality of the D.S. technique when employed with solar silicon feedstocks. Results indicate that structural breakdown limits the amount of the ingot which is usable for solar cells fabrication, but also that efficiencies in excess of 10% are obtained using the ''good'' region of the ingot.
Integrated nuclear techniques to detect illicit materials
DeVolpi, A.
This paper discusses the problem of detecting explosives in the context of an object being transported for illicit purposes. The author emphasizes that technologies developed for this particular application have payoffs in many related problem areas. The author discusses nuclear techniques which can be applied to this detection problem. These include: x-ray imaging; neutronic interrogation; inelastic neutron scattering; fieldable neutron generators. He discusses work which has been done on the applications of these technologies, including results for detection of narcotics. He also discusses efforts to integrate these techniques into complementary systems which offer improved performance.
Category:Field Techniques | Open Energy Information
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, click here. Category:Conceptual Model Add.png AddTechniquesTechniques page? For
Spectral Techniques for Solving PDE Stability Model of Vortex Rope
Bistrian, Diana Alina
In this paper spectral methods are applied to investigate the hydrodynamic instability of swirling flow with application to Francis hydraulic turbine. Spectral methods imply representing the problem solution as truncated series of smooth global functions. An L2 - projection and the collocation methods are developed assessing both analytically methodology and computational techniques using symbolic and numerical conversions. Remarks concerning the efficiency and the accuracy of each method in this case are presented. The model of the trailing vortex is used to validate the numerical algorithms with existing results in the literature. All the results are compared to existing ones and they prove to agree quite well. The advantages of using this methods in flow control problems are pointed out.
Advanced Process Monitoring Techniques for Safeguarding Reprocessing Facilities
Orton, Christopher R.; Bryan, Samuel A.; Schwantes, Jon M.; Levitskaia, Tatiana G.; Fraga, Carlos G.; Peper, Shane M.
The International Atomic Energy Agency (IAEA) has established international safeguards standards for fissionable material at spent fuel reprocessing plants to ensure that significant quantities of weapons-grade nuclear material are not diverted from these facilities. For large throughput nuclear facilities, it is difficult to satisfy the IAEA safeguards accountancy goal for detection of abrupt diversion. Currently, methods to verify material control and accountancy (MC&A) at these facilities require time-consuming and resource-intensive destructive assay (DA). Leveraging new on-line non destructive assay (NDA) process monitoring techniques in conjunction with the traditional and highly precise DA methods may provide an additional measure to nuclear material accountancy which would potentially result in a more timely, cost-effective and resource efficient means for safeguards verification at such facilities. By monitoring process control measurements (e.g. flowrates, temperatures, or concentrations of reagents, products or wastes), abnormal plant operations can be detected. Pacific Northwest National Laboratory (PNNL) is developing on-line NDA process monitoring technologies, including both the Multi-Isotope Process (MIP) Monitor and a spectroscopy-based monitoring system, to potentially reduce the time and resource burden associated with current techniques. The MIP Monitor uses gamma spectroscopy and multivariate analysis to identify off-normal conditions in process streams. The spectroscopic monitor continuously measures chemical compositions of the process streams including actinide metal ions (U, Pu, Np), selected fission products, and major cold flowsheet chemicals using UV-Vis, Near IR and Raman spectroscopy. This paper will provide an overview of our methods and report our on-going efforts to develop and demonstrate the technologies.
Quantum feedback control and classical control theory
Doherty, Andrew C. [Department of Physics, University of Auckland, Private Bag 92019, Auckland, (New Zealand)] [Department of Physics, University of Auckland, Private Bag 92019, Auckland, (New Zealand); Habib, Salman [Theoretical Division, T-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Theoretical Division, T-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Jacobs, Kurt [Theoretical Division, T-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Theoretical Division, T-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Mabuchi, Hideo [Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States)] [Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States); Tan, Sze M. [Department of Physics, University of Auckland, Private Bag 92019, Auckland, (New Zealand)] [Department of Physics, University of Auckland, Private Bag 92019, Auckland, (New Zealand)
We introduce and discuss the problem of quantum feedback control in the context of established formulations of classical control theory, examining conceptual analogies and essential differences. We describe the application of state-observer-based control laws, familiar in classical control theory, to quantum systems and apply our methods to the particular case of switching the state of a particle in a double-well potential. (c) 2000 The American Physical Society.
Matthew James
This paper explains some fundamental ideas of {\\em feedback} control of quantum systems through the study of a relatively simple two-level system coupled to optical field channels. The model for this system includes both continuous and impulsive dynamics. Topics covered in this paper include open and closed loop control, impulsive control, optimal control, quantum filtering, quantum feedback networks, and coherent feedback control.
Digital I and C system upgrade integration technique
Huang, H. W. [Inst. of Nuclear Energy Research (INER), No. 1000, Wenhua Road, Chiaan Village, Longtan Township, Taoyuan County, 32546, Taiwan (China); Shih, C. [Inst. of Nuclear Engineering and Science, National Tsing Hua Univ., 101, Sec. 2, Kuang Fu Rd, Hsinchu, Taiwan (China); Wang, J. R. [Inst. of Nuclear Energy Research (INER), No. 1000, Wenhua Road, Chiaan Village, Longtan Township, Taoyuan County, 32546, Taiwan (China); Huang, K. C. [Inst. of Nuclear Engineering and Science, National Tsing Hua Univ., 101, Sec. 2, Kuang Fu Rd, Hsinchu, Taiwan (China)
This work developed an integration technique for digital I and C system upgrade, the utility can replace the I and C systems step by step systematically by this method. Inst. of Nuclear Energy Research (INER) developed a digital Instrumentation and Control (I and C) replacement integration technique on the basis of requirement of the three existing nuclear power plants (NPPs), which are Chin-Shan (CS) NPP, Kuo-Sheng (KS) NPP, and Maanshan (MS) NPP, in Taiwan, and also developed the related Critical Digital Review (CDR) Procedure. The digital I and C replacement integration technique includes: (I) Establishment of Nuclear Power Plant Digital Replacement Integration Guideline, (2) Preliminary Investigation on I and C System Digitalization, (3) Evaluation on I and C System Digitalization, and (4) Establishment of I and C System Digitalization Architectures. These works can be a reference for performing I and C system digital replacement integration of the three existing NPPs of Taiwan Power Company (TPC). A CDR is the review for a critical system digital I and C replacement. The major reference of this procedure is EPRI TR- 1011710 (2005) 'Handbook for Evaluating Critical Digital Equipment and Systems' which was published by the Electric Power Research Inst. (EPRI). With this document, INER developed a TPC-specific CDR procedure. Currently, CDR becomes one of the policies for digital I and C replacement in TPC. The contents of this CDR procedure include: Scope, Responsibility, Operation Procedure, Operation Flow Chart, CDR review items. The CDR review items include the comparison of the design change, Software Verification and Validation (SVandV), Failure Mode and Effects Analysis (FMEA), Evaluation of Diversity and Defense-in-depth (D3), Evaluation of Watchdog Timer, Evaluation of Electromagnetic Compatibility (EMC), Evaluation of Grounding for System/Component, Seismic Evaluation, Witness and Inspection, Lessons Learnt from the Digital I and C Failure Events. A solid review can assure the quality of the digital I and C system replacement. (authors)
Expert system to control a fusion energy experiment
Johnson, R.R.; Canales, T.; Lager, D.
This paper describes a system that automates neutral beam source conditioning. The system achieves this with artificial intelligence techniques by encoding the behavior of several experts as a set of if-then rules in an expert system. One of the functions of the expert system is to control an adaptive controller that, in turn, controls the neutral beam source. The architecture of the system is presented followed by a description of its performance.
Mahadevan, Sankaran; Agarwal, Vivek; Neal, Kyle; Kosson, David; Adams, Douglas
The existing fleets of nuclear power plants in the United States have initial operating licenses of 40 years, though most these plants have applied for and received license extensions. As plant structures, systems, and components age, their useful life�considering both structural integrity and performance�is reduced as a result of deterioration of the materials. The online monitoring of concrete structure conducted under the Advanced Instrumentation, Information, and Control Technologies Pathway of the Light Water Reactor Sustainability program at Idaho National Laboratory will develop and demonstrate concrete structures health monitoring capabilities. Assessment and management of aging concrete structures in nuclear plants require a more systematic approach than simple reliance on existing code margins of safety. Therefore, the structural health monitoring is required to produce actionable information regarding structural integrity that supports operational and maintenance decisions. Through this research project, several national laboratories and Vanderbilt University proposes to develop a framework of research activities for the health monitoring of nuclear power plant concrete structures that includes integration of four elements�damage modeling, monitoring, data analytics, and uncertainty quantification. This report briefly discusses available techniques and ongoing challenges in each of the four elements of the proposed framework with emphasis on degradation mechanisms and online monitoring techniques.
A Comparison of Techniques for Detecting Abnormal Change in Blogs
Furuta, Dr. Richard Keith [Texas A& M University] [Texas A& M University; ShipmanIII, Dr. Frank Major [Texas A& M University] [Texas A& M University; Bogen, Paul Logasa [ORNL] [ORNL
Distributed collections are made of metadata entries that contain references to artifacts not controlled by the collection curators. These collections often have limited forms of change; for digital distributed collections, primarily creation and deletion of additional resources. However, there exists a class of digital collection that undergoes additional kinds of change. These collections consist of resources that are distributed across the Internet and brought together via hyperlinking. Resources in these collections can be expected to change as time goes on. Part of the difficulty in maintaining these collections is determining if a changed page is still a valid member of the collection. Others have tried to address this by defining a maximum allowed threshold of change, however, these methods treat change as a potential problem and treat web content as static despite its intrinsic dynamicism. Instead we acknowledge change on the web as a normal part of a web document and determine the difference between what a maintainer expects a page to do and what it actually does. In this work we evaluate options for extractors and analyzers from a suite of techniques against a human-generated ground-truth set of blog changes. The results of this work show a statistically significant improvement over traditional threshold techniques for our collection.
Hybrid laser welding techniques for enhanced welding efficiency
Beyer, E.; Poprawe, R. [Fraunhofer-Institut fuer Lasertechnik (ILT), Aachen (Germany); Brenner, B. [Fraunhofer-Institut fuer Werkstoffphysik und Schichttechnologie (IWS), Dresden (Germany)
One of the remarkable characteristics of the laser beam welding process is its thin deep welding seam. This thin seam is produced as a result of the high welding speed and the low heat input, leading to a low distortion. However, the overall electrical efficiency of a CO{sub 2}-laser is in the range of 5-7% and the efficiency of a Nd:YAG-laser is only approximately 2-3%. There are several applications in which the thin laser seam and the high welding speed, in particular, have technical advantages, making the whole process economical. However, there are also a lot of possible applications, for which laser welding is too expensive at the moment or, in which the thin seam leads to a lot of unsolved metallurgical problems. To avoid these problems, a welding technique is presently being developed at the ILT and IWS which combines laser keyhole welding with Tungsten inert gas and metal inert gas welding and introduces an inductor for a preheating and a controlled heat flow. The paper is divided into two sections. The first section describes recent investigations carried out by the ILT into the laser arc combination and the second section describes the combination of the laser and induction techniques, presenting also an application presently being used in production in the car industry. This work has been completed by the Fraunhofer-Institut fur Werkstoffphysik und Schichttechnologie IWS in Dresden.
Bornholm Web Mining Techniques rup Nielsen
Nielsen, Finn �?rup
Bornholm Web Mining Techniques Finn A �? rup Nielsen Informatics and Mathematical Modelling; Focused crawling #15; Counting links #15; Size of web-sites #15; PostScript/PDF conversion #15; Generation and Giles, 1998). \\[...] no engine indexes more than about 16% of the web" (Lawrence and Giles, 1999). #15
Ensemble Kalman Filtering with Shrinkage Regression Techniques
Eidsvik, Jo
Ensemble Kalman Filtering with Shrinkage Regression Techniques Jon S�trom & Henning Omre, Norwegian University of Science and Technology; Summary The classical Ensemble Kalman Filter (EnKF) is known;Introduction The Ensemble Kalman Filter (EnKF) is a Bayesian data assimilation method that in recent years has
Machine Learning Techniques for Passive Network Inventory
Paris-Sud XI, Université de
1 Machine Learning Techniques for Passive Network Inventory J´er^ome Franc¸ois, Humberto Abdelnur identify running code, is a powerful service for both security assessment and inventory management operator. Index Terms--fingerprinting, inventory management, syntactic tree, SVM. I. INTRODUCTION ASSUMING
Printing Techniques for Constructing Structural and
Petta, Jason
Printing Techniques for Constructing Structural and Compliant Electrochemical Energy Storage, but not electronically conductive #12;Spray Deposition #12;Spray Deposition #12;Using Spray Deposition to Construct 3D · Electrochemical characterization of 3D sprayed cell · Effect of stress on electrochemical performance
Knowledge Engineering Technique for Cluster Development
Paris-Sud XI, Universit� de
Knowledge Engineering Technique for Cluster Development Pradorn Sureephong1 , Nopasit Chakpitak1 management by using knowledge engineering which is one of the most important method for managing knowledge. This work analyzed three well known knowledge engineering methods, i.e. MOKA, SPEDE and Common
Intrusion Detection Techniques in Sensor Aikaterini Mitrokotsa
to the network administrator because communication between the access point and the clients is broadcastPDF PROOF Intrusion Detection Techniques in Sensor Networks Aikaterini Mitrokotsa Department Research has been conducted in wired network Intrusion Detection Systems (IDS) for over 25 years. Although
META-LEARNING Concepts and Techniques
Vilalta, Ricardo
.g., types of example distributions) under which a learning strategy is most appropriate. From a practicalChapter 1 META-LEARNING Concepts and Techniques Ricardo Vilalta University of Houston Christophe Giraud-Carrier ELCA Informatique SA Pavel Brazdil University of Porto Abstract The field of meta-learning
Constraints Techniques for Authoring Multimedia Documents
Joseph Fourier Grenoble-I, Universit�
Constraints Techniques for Authoring Multimedia Documents Muriel Jourdan, C�cile Roisin and Laurent://opera.inrialpes.fr/OPERA/ 1 Introduction A multimedia document is defined as a set of objects from different media (text been done for the definition of languages and formats of multimedia documents, largely focusing
Characterization techniques for surface-micromachined devices
Eaton, W.P.; Smith, N.F.; Irwin, L.; Tanner, D.M.
Using a microengine as the primary test vehicle, the authors have examined several aspects of characterization. Parametric measurements provide fabrication process information. Drive signal optimization is necessary for increased microengine performance. Finally, electrical characterization of resonant frequency and quality factor can be more accurate than visual techniques.
Medial Techniques for Automating Finite Element Analysis
Whitton, Mary C.
Medial Techniques for Automating Finite Element Analysis by Jessica Renee Crawford Crouch Analysis. (Under the direction of Stephen M. Pizer.) Finite element analysis provides a principled method the simulation of tissue deformation. The drawback to using finite element analysis for imaging problems
michael smith ornlradioactive beams: equipment & techniques recoil separators
michael smith ornlradioactive beams: equipment & techniques recoil separators approach! · directly Smith, Rolfs, Barnes NIMA306 (1991) 233 #12;michael smith ornlradioactive beams: equipment & techniques;michael smith ornlradioactive beams: equipment & techniques recoil separators proof of concept with 12C
Jul 4, 2012 ... minimizing a general separable convex function over network flow ...... B A ) (N), we can control the size of l using Proposition 3.11 or Propo-.
Design And Verification of Controllers for Coupled Bunch Instabilities Using Optimal Control Theory And Numerical Simulation: Predictions for PEP II
Hindi, Haitham; Prabhakar, Shyam; Fox, John D.; Linscott, Ivan; Teytelman, Dmitri; /SLAC
We present a technique for the design and verification of efficient bunch-by-bunch controllers for damping longitudinal multibunch instabilities. The controllers attempt to optimize the use of available feedback amplifier power - one of the most expensive components of a feedback system - and define the limits of the closed loop system performance. Our design technique alternates between analytic computation of single bunch optimal controllers and verification on a multibunch numerical simulator. The simulator uses PEP-II parameters and identifies unstable coupled bunch modes, their growth rates and their damping rates with feedback. The results from the simulator are shown to be in reasonable agreement with analytical calculations based on the single bunch model. The technique is then used to evaluate the performance of a variety of controllers proposed for PEP-II.
Neural Network Based Montioring and Control of Fluidized Bed.
Bodruzzaman, M.; Essawy, M.A.
The goal of this project was to develop chaos analysis and neural network-based modeling techniques and apply them to the pressure-drop data obtained from the Fluid Bed Combustion (FBC) system (a small scale prototype model) located at the Federal Energy Technology Center (FETC)-Morgantown. The second goal was to develop neural network-based chaos control techniques and provide a suggestive prototype for possible real-time application to the FBC system. The experimental pressure data were collected from a cold FBC experimental set-up at the Morgantown Center. We have performed several analysis on these data in order to unveil their dynamical and chaotic characteristics. The phase-space attractors were constructed from the one dimensional time series data, using the time-delay embedding method, for both normal and abnormal conditions. Several identifying parameters were also computed from these attractors such as the correlation dimension, the Kolmogorov entropy, and the Lyapunov exponents. These chaotic attractor parameters can be used to discriminate between the normal and abnormal operating conditions of the FBC system. It was found that, the abnormal data has higher correlation dimension, larger Kolmogorov entropy and larger positive Lyapunov exponents as compared to the normal data. Chaotic system control using neural network based techniques were also investigated and compared to conventional chaotic system control techniques. Both types of chaotic system control techniques were applied to some typical chaotic systems such as the logistic, the Henon, and the Lorenz systems. A prototype model for real-time implementation of these techniques has been suggested to control the FBC system. These models can be implemented for real-time control in a next phase of the project after obtaining further measurements from the experimental model. After testing the control algorithms developed for the FBC model, the next step is to implement them on hardware and link them to the experimental system. In this report, the hardware implementation issues of the control algorithms are also discussed.
PID techniques: Alternatives to RICH Methods
Vavra, J.; /SLAC
In this review article we discuss the recent progress in PID techniques other than the RICH methods. In particular we mention the recent progress in the Transition Radiation Detector (TRD), dE/dx cluster counting, and Time Of Flight (TOF) techniques. The TRD technique is mature and has been tried in many hadron colliders. It needs space though, about 20cm of detector radial space for every factor of 10 in the {pi}/e rejection power, and this tends to make such detectors large. Although the cluster counting technique is an old idea, it was never tried in a real physics experiment. Recently, there are efforts to revive it for the SuperB experiment using He-based gases and waveform digitizing electronics. A factor of almost 2 improvement, compared to the classical dE/dx performance, is possible in principle. However, the complexity of the data analysis will be substantial. The TOF technique is well established, but introduction of new fast MCP-PMT and G-APD detectors creates new possibilities. It seems that resolutions below 20-30ps may be possible at some point in the future with relatively small systems, and perhaps this could be pushed down to 10-15ps with very small systems, assuming that one can solve many systematic issues. However, the cost, rate limitation, aging and cross-talk in multi-anode devices at high BW are problems. There are several groups working on these issues, so progress is likely. Table 6 summarizes the author's opinion of pros and cons of various detectors presented in this paper based on their operational capabilities. We refer the reader to Ref.40 for discussion of other more general limits from the PID point of view.
Sorin, Eric J.
EXPORT CONTROLS MANUAL PREPARED BY: Office of General Counsel The California State University SEPTEMBER 2012 #12; Export Controls Manual Table of Contents I. INTRODUCTION ......................................................................................................... 1 II. HISTORY OF EXPORT CONTROLS
An all-optical ion-loading technique for scalable microtrap architectures
R. J. Hendricks; D. M. Grant; P. F. Herskind; A. Dantan; M. Drewsen
An experimental demonstration of a novel all-optical technique for loading ion traps, that has particular application to microtrap architectures, is presented. The technique is based on photo-ionisation of an atomic beam created by pulsed laser ablation of a calcium target, and provides improved temporal control compared to traditional trap loading methods. Ion loading rates as high as 125 ions per second have so far been observed. Also described are observations of trap loading where Rydberg state atoms are photo-ionised by the ion Doppler cooling laser.
The Power Spectrum of Galaxy Density Fluctuations: Current Results and Improved Techniques
Michael S. Vogeley
The power spectrum of density fluctuations measured from galaxy redshift surveys provides important constraints on models for the formation of large-scale structure. I review current results for the 3-D power spectrum and examine the limitations of current measurements and estimation techniques. To span the decade of wavelength between the scales probed by galaxy surveys and COBE, measure the detailed shape of the power spectrum, and accurately examine the dependence of clustering on galaxy species, we require deeper samples with carefully controlled selection criteria and improved techniques for power spectrum estimation. I describe a new method for estimating the power spectrum that optimally treats survey data with arbitrary geometry and sampling.
New ALS Technique Guides IBM in Next-Generation Semiconductor...
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New ALS Technique Guides IBM in Next-Generation Semiconductor Development New ALS Technique Guides IBM in Next-Generation Semiconductor Development Print Wednesday, 21 January 2015...
Promising Inspection Technique for Vehicle Welding Offers Efficient...
Office of Environmental Management (EM)
Promising Inspection Technique for Vehicle Welding Offers Efficient Alternative Promising Inspection Technique for Vehicle Welding Offers Efficient Alternative April 22, 2015 -...
High-Throughput/Combinatorial Techniques in Hydrogen Storage...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
High-ThroughputCombinatorial Techniques in Hydrogen Storage Materials R&D (presentation) High-ThroughputCombinatorial Techniques in Hydrogen Storage Materials R&D (presentation)...
High Througput Combinatorial Techniques in Hydrogen Storage Materials...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
High Througput Combinatorial Techniques in Hydrogen Storage Materials R&D Workshop High Througput Combinatorial Techniques in Hydrogen Storage Materials R&D Workshop Summary of the...
New Mass Spectrometry Techniques for Studying Physical Chemistry...
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Mass Spectrometry Techniques for Studying Physical Chemistry of Atmospheric Heterogeneous Processes. New Mass Spectrometry Techniques for Studying Physical Chemistry of Atmospheric...
advanced measurement techniques: Topics by E-print Network
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Websites Summary: Advanced Techniques for the Creation and Propagation of Modules in Cartesian Genetic Programming) advanced techniques for module creation and propagation...
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Ground Control Ground Control Released: April 22, 2015 EMSL scientists develop new methods to dig deeper into soil organic matter International Year of the Soils Under our feet...
Voltage Control Technical Conference
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Intro Voltage Control Conference - BPA Active Power Control in Wind Parks - Siemens Interconnection Criteria for Frequency Response Requirements - NERC Model Validation...
Broader source: Energy.gov (indexed) [DOE]
iPortal Space. III. GAO Standards for Internal Control in the Federal Government In 1999, GAO issued revised Standards for Internal Control in the Federal Government. This...
Improving the Performance of a Two-Shell Column with Advanced Control
Morrison, T. A.; Laflamme, D.
IMPROVING THE PERFORMANCE OF A TWO-SHELL COLUMN WITH ADVANCED CONTROL TIMOTHY A. MORRISON SENIOR PROJECT ENGINEER SETPOINT Inc. Houston, Texas ABSTRACT Application of advanced control techniques to a two-shell, two- pressure distillation... column has yielded stable operation with reduced utility consumption and increased capacity. Prior to the application of advanced controls this column was a plant capacity limit and composition control was very difficult. The advanced controls now...
Retrofit Diesel Emissions Control System Providing 50% NOxControl...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Diesel Emissions Control System Providing 50% NOxControl Retrofit Diesel Emissions Control System Providing 50% NOxControl 2005 Diesel Engine Emissions Reduction (DEER) Conference...
Fractured reservoir evaluation using Monte Carlo techniques
Sears, G.F.; Phillips, N.V.
Pro forma cash-flow analysis of petroleum ventures usually is considered as a deterministic model. In the last 10 years, Monte Carlo analysis has allowed the introduction of probability distributions of input variables in place of single-valued functions. Reserve determination and rate scheduling in these current Monte Carlo techniques have relied on the volumetric formula, which works well in nonfractured reservoirs. Recent massive drilling in fractured reservoirs has rendered this approach unusable. This paper develops a variation of the Arps rate-cumulative equation as a basic model for the determination of the distribution of original reserves and the decline rates. Continuation of the Monte Carlo technique into net present value analysis and internal rate of return (IRR) is also developed.
Nonlinear optical techniques for surface studies. [Monolayers
Shen, Y.R.
Recent effort in developing nonlinear optical techniques for surface studies is reviewed. Emphasis is on monolayer detection of adsorbed molecules on surfaces. It is shown that surface coherent antiStokes Raman scattering (CARS) with picosecond pulses has the sensitivity of detecting submonolayer of molecules. On the other hand, second harmonic or sum-frequency generation is also sensitive enough to detect molecular monolayers. Surface-enhanced nonlinear optical effects on some rough metal surfaces have been observed. This facilitates the detection of molecular monolayers on such surfaces, and makes the study of molecular adsorption at a liquid-metal interface feasible. Advantages and disadvantages of the nonlinear optical techniques for surface studies are discussed.
Aromatics Extraction Plant Design Using Synthesis Techniques
Wilcox, R. J.; Nedwick, R.
were changed. The process modified design has process conditions altered to create opportunities for heat integration. Distillation column pressure changes were the primary modifications. In this design the plant was also divided into two sections... the aid of modern synthesis techniques. The only heat integration in the Extraction Section is the Recovery Column bottoms preheating the Regenerator feed then the Stripper feed. The Distillation Section has no heat integration. This design uses 73...
Compact Optical Technique for Streak Camera Calibration
Curt Allen; Terence Davies; Frans Janson; Ronald Justin; Bruce Marshall; Oliver Sweningsen; Perry Bell; Roger Griffith; Karla Hagans; Richard Lerche
The National Ignition Facility is under construction at the Lawrence Livermore National Laboratory for the U.S. Department of Energy Stockpile Stewardship Program. Optical streak cameras are an integral part of the experimental diagnostics instrumentation. To accurately reduce data from the streak cameras a temporal calibration is required. This article describes a technique for generating trains of precisely timed short-duration optical pulses that are suitable for temporal calibrations.
Downhole drilling network using burst modulation techniques
Hall; David R. (Provo, UT), Fox; Joe (Spanish Fork, UT)
A downhole drilling system is disclosed in one aspect of the present invention as including a drill string and a transmission line integrated into the drill string. Multiple network nodes are installed at selected intervals along the drill string and are adapted to communicate with one another through the transmission line. In order to efficiently allocate the available bandwidth, the network nodes are configured to use any of numerous burst modulation techniques to transmit data.
Selected applications of microwave radiometric techniques�
Jean, Buford Randall
of oil (=2) is much less than that of water (=80) [17]. Since the calming effect of an oil layer on a water surface tends to decrease the effective emissivity, the possibility exists for an oil spill to be "invisible" for certain frequencies, viewing... above about 30 GHz can be expected to provide an oil slick detection capability [34]. The higher fre- quencies are required because an uncontained oil spill spreads rapidly, and it is estimated that an oil pollution surveillance technique should...
Techniques for remotely sensing watershed runoff potential
Walker, Jerry Don
Techniques for Remotely Sensing Watershed Runoff Potential. (August 1978) Jerry Don Walker, B. S. , Texas ASM University Directed by: Dr. Bruce J. Blanchard The Soil Conservation Service runoff equation is widely used for predicting the watershed runoff... cases, no outflow occurs through the spillway of an overdes1gned structure. Since evaporation losses are high 1n these areas, the salinity of the water stored in the structure gradually increases with time. With insufficient flow through...
Estimation techniques for large-scale turbulent fluid systems
Colburn, Christopher Hughes
R. 1972 Linear Optimal Control Systems. Wiley- Intersciencetime optimal control theory applied to the linear system (time optimal control theory applied to the linear system (
A 1Gsample/s 6-bit flash A/D converter with a combined chopping and averaging technique for reduced distortion in 0.18(mu)m CMOS
Stefanou, Nikolaos
will give an introduction to RNGs and present a technique to produce many high speed uncorrelated truly binary random number generators (RNGs) utilizing least area and power. The technique relies on the phase noise and jitter of voltage controlled... oscillators (VCOs) to generate RNGs using the oscillator sampling technique. To obtain true randomness, the frequency of oscillation of the VCOs is controlled by other RNGs in the array, increasing the jitter spread much more than conventional designs...
Frequency Scalable Non-Linear Waveform Generator for Mixed-Simal Power-Factor-Correction IC Controller'
-frequency applications due to the complex, real-time computations demanded of the controller. This paper introduces a non-linear-Signal IC Gontroller Block Diagram frequency scalable non-linear waveform generators for the IC controller techniques [5]. The controller is based on the non-linear carrier (NLC) control method [6]. At the beginning
Optimal Control of a VoiceCoilMotor with Coulombic Friction Bahne Christiansen, Helmut Maurer and Oliver Zirn
Maurer, Helmut
1 and developed automatic control techniques for steering the system to a prescribed target. However is to improve on these deficiences by applying optimal control methods. The optimal control model is introduced in section II. Basically, the dynamical model is linear in the state and control variables. However
A Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel Inverted Pendulum
Paris-Sud XI, Universit� de
regulation. The main contribution of this paper is to design a new control scheme based on model-free controlA Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel method allowing recent model-free control technique to deal with underactuated mechanical systems
An Introduction to Quantum Control
James, Matthew
, stochastic control, quantum control, systems biology, networks, etc modern control #12;Quantum Control: Control of physical systems whose behaviour is dominated by the laws of quantum mechanics. 2003: Dowling of Quantum Control: controller quantum system control actions #12;� Closed loop - control actions depend
Nuclear reactor control apparatus
Sridhar, B.N.
Nuclear reactor core safety rod release apparatus comprises a control rod having a detent notch in the form of an annular peripheral recess at its upper end, a control rod support tube for raising and lowering the control rod under normal conditions, latches pivotally mounted on the control support tube with free ends thereof normally disposed in the recess in the control rod, and cam means for pivoting the latches out of the recess in the control rod when a scram condition occurs. One embodiment of the invention comprises an additonal magnetically-operated latch for releasing the control rod under two different conditions, one involving seismic shock.
Nuclear reactor control apparatus
Sridhar, Bettadapur N. (Cupertino, CA)
Nuclear reactor core safety rod release apparatus comprises a control rod having a detent notch in the form of an annular peripheral recess at its upper end, a control rod support tube for raising and lowering the control rod under normal conditions, latches pivotally mounted on the control support tube with free ends thereof normally disposed in the recess in the control rod, and cam means for pivoting the latches out of the recess in the control rod when a scram condition occurs. One embodiment of the invention comprises an additional magnetically-operated latch for releasing the control rod under two different conditions, one involving seismic shock.
Inversion in indirect optimal control: constrained and unconstrained F. Chaplais and N. Petit
Abstract-- This paper focuses on using non linear inversion in optimal control problems. This technique, we address the case of linear systems with a control affine cost to be minimized under inputInversion in indirect optimal control: constrained and unconstrained cases F. Chaplais and N. Petit
Nonlinear Adaptive Control of Networked Power Generators with Remote Measurement Units
Paris-Sud XI, Universit� de
of view of Control Engineering the power systems urge for more modern and accurate techniques. Due provided by Phasor Measurement Units (PMU). The proposed control system is designed in a robust way measurements on control schemes. In the last three decades the power systems have been growing in complexity
Interference Mitigation via Power Control under the One-Power-Zone Constraint
Yu, Wei
Interference Mitigation via Power Control under the One-Power-Zone Constraint Hayssam Dahrouj, Wei on different zones. The objective of this paper is to design power control strategies to mitigation inter this constrained power control problem based on an iterative function evaluation technique. The proposed algorithms
DRIVER ASSISTED CONTROL STRATEGIES: THEORY AND EXPERIMENT Mark DePoorter
Brennan, Sean
performance is specified as a Reference Model. The driver maintains nominal control of the vehicle by direct actuation of the front steering inputs. The controller then determines the appropriate rear steer inputs. An appropriate vehicle model is developed and a polynomial pole placement technique is used to control
A Comparative Study of Vision-Based Lateral Control Strategies for Autonomous Highway Driving
Malik, Jitendra
to verify the accuracy and e cacy of our modeling and control techniques. 1 #12;Section 2 of this paper of relevant features in the time-varying images and the control part deals with the design of the steering control law. Di erent aspects of steering problem have been examined in the past, both in the engineering
SWITCHED CONTROLLER DESIGNt L. S. lRLICHT LM.Y. MAREELS J.B. MOORE
Moore, John Barratt
of standard linear time-invariant control techniques may not be effective, due to model uncer- tainties, non-linear elements, and high model order. To focus on a control problem which exhibits these features, perhaps problem, first a finite order model is created and then a controller is designed for this model. However
Controlled Manipulation of Nanoparticles : Scanning Probe Measurements and Modelling of Trajectories
Amrhein, Valentin
Controlled Manipulation of Nanoparticles : Scanning Probe Measurements and Modelling on the manipulation of Au nanoparticles. A new technique for controlled manipulation of nanospheres and asymmetric, is a common experience in atomic force microscopy (AFM). Understanding how to control and turn this effect
Sliding Mode Adaptive Neural-network Control for Nonholonomic Mobile Modular Manipulators
Li, Yangmin
Sliding Mode Adaptive Neural-network Control for Nonholonomic Mobile Modular Manipulators Yangmin adaptive neural-network controller for trajectory following of nonholonomic mobile modular manipulators model of the mobile modular manipulator. Sliding mode control and direct adaptive technique are combined
Sliding Mode Adaptive Neural-Network Control for Nonholonomic Mobile Modular Manipulators
Li, Yangmin
Sliding Mode Adaptive Neural-Network Control for Nonholonomic Mobile Modular Manipulators YUGANG the dynamic model of the mobile mod- ular manipulator. Sliding mode control and direct adaptive technique modular manipulator, sliding mode control. 1. Introduction In the past decades, modular manipulators have
Nonlinear Feedback Controllers and Compensators: A StateDependent Riccati Equation Approach
rules that allow the modeler and designer to make trade�o#s between control e#ort and output error) techniques are rapidly emerging as general design and synthesis methods of nonlinear feedback controllers�based feedback controllers. 1 Introduction Linear quadratic regulation (LQR) is a well established, accepted
Nonlinear Feedback Controllers and Compensators: A State-Dependent Riccati Equation Approach
rules that allow the modeler and designer to make trade-offs between control effort and output error) techniques are rapidly emerging as general design and synthesis methods of nonlinear feedback controllers-based feedback controllers. 1 Introduction Linear quadratic regulation (LQR) is a well established, accepted
Undergraduate reactor control experiment
Edwards, R.M.; Power, M.A.; Bryan, M. (Pennsylvania State Univ., University Park (United States))
A sequence of reactor and related experiments has been a central element of a senior-level laboratory course at Pennsylvania State University (Penn State) for more than 20 yr. A new experiment has been developed where the students program and operate a computer controller that manipulates the speed of a secondary control rod to regulate TRIGA reactor power. Elementary feedback control theory is introduced to explain the experiment, which emphasizes the nonlinear aspect of reactor control where power level changes are equivalent to a change in control loop gain. Digital control of nuclear reactors has become more visible at Penn State with the replacement of the original analog-based TRIGA reactor control console with a modern computer-based digital control console. Several TRIGA reactor dynamics experiments, which comprise half of the three-credit laboratory course, lead to the control experiment finale: (a) digital simulation, (b) control rod calibration, (c) reactor pulsing, (d) reactivity oscillator, and (e) reactor noise.
Linear beam raster magnet driver based on H-bridge technique
Sinkine, Nikolai I.; Yan, Chen; Apeldoorn, Cornelis; Dail, Jeffrey Glenn; Wojcik, Randolph Frank; Gunning, William
An improved raster magnet driver for a linear particle beam is based on an H-bridge technique. Four branches of power HEXFETs form a two-by-two switch. Switching the HEXFETs in a predetermined order and at the right frequency produces a triangular current waveform. An H-bridge controller controls switching sequence and timing. The magnetic field of the coil follows the shape of the waveform and thus steers the beam using a triangular rather than a sinusoidal waveform. The system produces a raster pattern having a highly uniform raster density distribution, eliminates target heating from non-uniform raster density distributions, and produces higher levels of beam current.
Quality-of-Service and Error Control Techniques for Network-on-Chip Architectures
Chatha, Karam S.
sensitive to noise sources such as power supply noise, crosstalk, radiation induced effects, that are likely accurate power and performance models of the two architec- ture enhancements for a 4x4 mesh based No and Design Aids B.4.3 [Input/Output and Data Communications]: Interconnec- tions - - Topology General Terms
An analysis of the size-control and uniformity of polymeric nanoparticle preparation techniques
Pyle, Benjamin Ryan
Nanoparticles are bridge the gap between the micro and atomic scale and have found a variety of different used, especially in the drug-delivery field. This paper will break down some of the mot common methods for polymeric ...
Incorporating modern development and evaluation techniques into the creation of large-scale, spacecraft control software
Weiss, Kathryn Anne, 1979-
One of the major challenges facing the development of today's safety- and mission-critical space systems involves the construction of software to support the goals and objectives of these missions, especially those associated ...
Introduction to Commercial Building Control Strategies and Techniques for Demand Response -- Appendices
Motegi, N.
6 - Packaging & Cold Storage Facility 7 - (Packaging & SColdfarm pumps .. Shut off cold storage and selected process and30 p.m . .. Shut off cold storage for maximum allowed period
Comparison between block and computer controlled techniques of scheduling for a job shop�
Garrison, William Ray
) ~ PRQCA (100 ~ 15) ~ JNI (100s)5) s JN*(100 ~ 15) ~ TPJ (()00(A) ~ ISED (20 I ) ~ TPQ(20 ) e Cl K(16 ) e INDEX(15) s INOEX1 (15) ~ INDEX2(15 ) s 7 IDLE( 15) s SO IT(1 15) s INTLS(15) sEQT(15) eSQM(15) COMMON STI sSTAsNEXT I sNEX7AePRQCA ~ PROCI ~ JNI... ~ ~ 11 0 JNI t I ~ K)00 JNA(I ~ K)00 CONTINUE DO 3 1=10600 DO 3 K=104 TPJ(l 1K) 00 ~ A JOB IS READY TQ ENTER SYSTEM ~ ~ ~ 1 ~ ~ ~ ~ 1 ~ 11 ~ ~ 01 100 ~ 0 ~ ~ IF (NUMBER-ITNOJ) 19 ~ 190400 CALL READ NUMBER=NUMBER+1 GO TO 6 CLK (16 ) 01 0E6 ST=I...
Introduction to Commercial Building Control Strategies and Techniques for Demand Response -- Appendices
Motegi, N.; Piette, M.A.; Watson, D.S.; Kiliccote, S.; Xu, P.
There are 3 appendices listed: (A) DR strategies for HVAC systems; (B) Summary of DR strategies; and (C) Case study of advanced demand response.
Development of fabrication techniques for europia/iron cermet reactor control-arm plates
Moore, D.A.; Tarrant, E.A.
Dense europia spheroids were dispersed in iron powder prior to pressing and sintering. The plates had adequate strength and possessed a neutron absorption worth in excess of comparable cadmium plates. 4 refs.
Technique for controlling shrinkage distortion in cold-pressed annular pellets
Johnson, R.G.R.; Burke, T.J.
A process and apparatus are described for the production of annular fuel pellets comprising locating particulate fuel material in a compaction chamber having side walls, a moveable punch located opposite a fixed member and a frustoconical element having a taper of between about 0.010 to 0.015 inches/inch located in about the center of the chamber. The punch is moved toward the fixed surface to compact the particulate material. The compacted pellet is fired to produce sintered pellets having substantially straight inner side walls essentially parallel to the pellet axis.
Introduction to Commercial Building Control Strategies and Techniques for Demand Response -- Appendices
Motegi, N.
limit 70% High Price GTA cooling -7 7S0F Supply fan quantityOffice GTA cooling 1.5�F increase Supply fan VFD lock ~to total chilled water supply Btu/h. Cooling power dropped
Microfluidic advantage : novel techniques for protein folding and oxygen control in cell cultures
Polinkovsky, Mark E.; Polinkovsky, Mark E.
a dedicated source (arc lamp or LED in our setup), passesgreen). So, a laser, LED, or mercury lamp outputting lightexcitation. We use LEDs instead of mercury lamps because
Microfluidic advantage : novel techniques for protein folding and oxygen control in cell cultures
Polinkovsky, Mark E.; Polinkovsky, Mark E.
have 20 mm long segments of polyimide-coated fused-silicaA segment of 18-gauge polyimide tubing is inserted into thehas a 15 mm long 21-gauge polyimide capillary inserted into
Techniques for noise suppression and robust control in spin-based quantum information processors
Borneman, Troy William
Processing information quantum mechanically allows the relatively efficient solution of many important problems thought to be intractable on a classical computer. A primary challenge in experimentally implementing a quantum ...
Refinement of freeway surveillance & control techniques by optical speed and occupancy detection
Courage, K. G
$pv't 1", h 'so''jT 07 7'77TT&(Ar S, p~rv; 7 Saon E: COP'SOJ ' j'CSIPZQ 7 3Y OTTTCAL SPT. " 'D '7'~D OCCU ACT D. '2~CT '-'i& A Thesis KZU77PTS GEANT COOM. ~'"' Subm tted to the Grec', uate Co13eSo o. ' the Texas l&Q4 Ur. iver sty in parti?1... stion. ". , " HRD Record 11o. 15 t, p. 2 t-)'(, lo67. CRAPTER II FFASIBII Ilv Ai, ALYSIS This cha?ter will d. eal with the Zeasibili+y of using a simple opt. i- cal speed trap as a s?pplement to pot detecLion in the measurement of traf'fic flow...
Nonlinear rate control techniques for constant bit rate MPEG video coders�
Saw, Yoo-Sok
Digital visual communication has been increasingly adopted as an efficient new medium in a variety of different fields; multi-media computers, digital televisions, telecommunications, etc. Exchange of visual information ...
Comparative Analysis of Control Techniques for Efficiency Improvement in Electric Vehicles
energy efficient and less polluting drive-train alternative to conventional internal combustion engine, University of Biskra, Biskra, Algeria Abstract--This paper presents system analysis, modeling and simulation dynamics and system architecture. Simulation tests have been carried out on a 37-kW EV that consists
Application accelerator system having bunch control
Wang, Dunxiong (Newport News, VA); Krafft, Geoffrey Arthur (Newport News, VA)
An application accelerator system for monitoring the gain of a free electron laser. Coherent Synchrotron Radiation (CSR) detection techniques are used with a bunch length monitor for ultra short, picosec to several tens of femtosec, electron bunches. The monitor employs an application accelerator, a coherent radiation production device, an optical or beam chopping device, an infrared radiation collection device, a narrow-banding filter, an infrared detection device, and a control.
Application accelerator system having bunch control
Wang, D.; Krafft, G.A.
An application accelerator system for monitoring the gain of a free electron laser is disclosed. Coherent Synchrotron Radiation (CSR) detection techniques are used with a bunch length monitor for ultra short, picosec to several tens of femtosec, electron bunches. The monitor employs an application accelerator, a coherent radiation production device, an optical or beam chopping device, an infrared radiation collection device, a narrow-banding filter, an infrared detection device, and a control. 1 fig.
Nuclear Power - Control, Reliability and Human Factors
of Actinides: Where Do We Stand with the Accelerator Mass Spectrometry Technique? 167 Mario De Cesare Part 2 Reliability and Failure Mechanisms 187 Chapter 10 Evaluation of Dynamic J-R Curve for Leak Before Break Design of Nuclear Reactor Coolant Piping... Network 6. Autonomous Control for Space 7. Radiation-Hard and Intelligent Optical Fiber Sensors 8. Monitoring Radioactivity 9. Origin and Detection of Actinides ? Reliability and Failure Mechanisms 10. Dynamic J-R Curve for Leak Analysis 11...
A tuning method of two degrees of freedom PID controller
Kasahara, Masato; Kimbara, Akiomi; Kurosu, Shigeru [Oyama National Coll. of Technology (Japan); Matsuba, Tadahiko; Kamimura, Kazuyuki [Yamatake-Honeywell Co. Ltd, Tokyo (Japan). Building System Div.; Murasawa, Itaru; Hashimoto, Yukihiro [Tonets Corp., Tokyo (Japan). Engineering Project Dept.
This paper proposes a new tuning method when using a two degrees of freedom proportional-integral-derivative (PID) controller. Its control performance for a first-order lag plus deadtime system is shown as an example of the commonly approximated controlled plants in the heating, ventilating, and air-conditioning (HVAC) field. Reference and disturbance input changes to a conventional PID controller do not necessarily give a satisfactory response. To overcome this problem, several two degrees of freedom PID (2 DOF PID) algorithms have been developed to replace the conventional PID controllers. However, when these techniques are applied to real plants, it is not usually easy to obtain a set of optimum tuning parameters. To evaluate the control performance, a comparison is carried out between the two tuning methods--the optimization technique and the partial model matching method--using simulation. Graphs by which the controller parameters can be related to dynamics of a popular plant are developed. The 2 DOF PID control is studied taking into account modeling error due to a change in plant characteristics. It is found that the 2 DOF PID controller designed based on the partial model matching method is robust and useful in simulations where a traditional PID controller would be used.
ROOT LOCUS TECHNIQUE 323 7.6.1 Hydro Power Plant Experiment
Gajic, Zoran
ROOT LOCUS TECHNIQUE 323 7.6.1 Hydro Power Plant Experiment The design of a static controller for a real hydro power plant is considered in Skatari�?? c and Gaji�?? c (1992). The hydro power plant is treated variables of this hydro power plant are represented by x T = [1` 1! 1u f 1/ d 1/ q 1/ f 1/D 1/Q ] where 1
Louis J. Durlofsky; Khalid Aziz
Nonconventional wells, which include horizontal, deviated, multilateral and ''smart'' wells, offer great potential for the efficient management of oil and gas reservoirs. These wells are able to contact larger regions of the reservoir than conventional wells and can also be used to target isolated hydrocarbon accumulations. The use of nonconventional wells instrumented with downhole inflow control devices allows for even greater flexibility in production. Because nonconventional wells can be very expensive to drill, complete and instrument, it is important to be able to optimize their deployment, which requires the accurate prediction of their performance. However, predictions of nonconventional well performance are often inaccurate. This is likely due to inadequacies in some of the reservoir engineering and reservoir simulation tools used to model and optimize nonconventional well performance. A number of new issues arise in the modeling and optimization of nonconventional wells. For example, the optimal use of downhole inflow control devices has not been addressed for practical problems. In addition, the impact of geological and engineering uncertainty (e.g., valve reliability) has not been previously considered. In order to model and optimize nonconventional wells in different settings, it is essential that the tools be implemented into a general reservoir simulator. This simulator must be sufficiently general and robust and must in addition be linked to a sophisticated well model. Our research under this five year project addressed all of the key areas indicated above. The overall project was divided into three main categories: (1) advanced reservoir simulation techniques for modeling nonconventional wells; (2) improved techniques for computing well productivity (for use in reservoir engineering calculations) and for coupling the well to the simulator (which includes the accurate calculation of well index and the modeling of multiphase flow in the wellbore); and (3) accurate approaches to account for the effects of reservoir heterogeneity and for the optimization of nonconventional well deployment. An overview of our progress in each of these main areas is as follows. A general purpose object-oriented research simulator (GPRS) was developed under this project. The GPRS code is managed using modern software management techniques and has been deployed to many companies and research institutions. The simulator includes general black-oil and compositional modeling modules. The formulation is general in that it allows for the selection of a wide variety of primary and secondary variables and accommodates varying degrees of solution implicitness. Specifically, we developed and implemented an IMPSAT procedure (implicit in pressure and saturation, explicit in all other variables) for compositional modeling as well as an adaptive implicit procedure. Both of these capabilities allow for efficiency gains through selective implicitness. The code treats cell connections through a general connection list, which allows it to accommodate both structured and unstructured grids. The GPRS code was written to be easily extendable so new modeling techniques can be readily incorporated. Along these lines, we developed a new dual porosity module compatible with the GPRS framework, as well as a new discrete fracture model applicable for fractured or faulted reservoirs. Both of these methods display substantial advantages over previous implementations. Further, we assessed the performance of different preconditioners in an attempt to improve the efficiency of the linear solver. As a result of this investigation, substantial improvements in solver performance were achieved.
Policy on Export Controls Export Control Policy
Sridhar, Srinivas
Policy on Export Controls 8/5/2014 Export Control Policy I. Purpose and Scope Northeastern, the export of certain goods, information, technology and services is restricted for reasons relating to U.S. national security, economic interests, and foreign policy goals. The export laws and regulations address
Hiskens, Ian A.
controlled loads (TCLs) has demonstrated that such load following is feasible, but analyt- ical models) is well matched to the role of load following. Re- search into the behavior of TCLs began with the work was then employed in a minimum variance control law to demonstrate the load following capability of a population
Investigating High Field Gravity using Astrophysical Techniques
Bloom, Elliott D.; /SLAC
The purpose of these lectures is to introduce particle physicists to astrophysical techniques. These techniques can help us understand certain phenomena important to particle physics that are currently impossible to address using standard particle physics experimental techniques. As the subject matter is vast, compromises are necessary in order to convey the central ideas to the reader. Many general references are included for those who want to learn more. The paragraphs below elaborate on the structure of these lectures. I hope this discussion will clarify my motivation and make the lectures easier to follow. The lectures begin with a brief review of more theoretical ideas. First, elements of general relativity are reviewed, concentrating on those aspects that are needed to understand compact stellar objects (white dwarf stars, neutron stars, and black holes). I then review the equations of state of these objects, concentrating on the simplest standard models from astrophysics. After these mathematical preliminaries, Sec. 2(c) discusses 'The End State of Stars'. Most of this section also uses the simplest standard models. However, as these lectures are for particle physicists, I also discuss some of the more recent approaches to the equation of state of very dense compact objects. These particle-physics-motivated equations of state can dramatically change how we view the formation of black holes. Section 3 focuses on the properties of the objects that we want to characterize and measure. X-ray binary systems and Active Galactic Nuclei (AGN) are stressed because the lectures center on understanding very dense stellar objects, black hole candidates (BHCs), and their accompanying high gravitational fields. The use of x-ray timing and gamma-ray experiments is also introduced in this section. Sections 4 and 5 review information from x-ray and gamma-ray experiments. These sections also discuss the current state of the art in x-ray and gamma-ray satellite experiments and plans for future experiments.
Benmei, Chen
-related journals including Automatica, Systems and Control Letters, and IEEE Transac- tions on Automatic Control Transactions on Automatic Control, Automatica, System and Control Letters, and European Journal of ControlOCTOBER 2013 � IEEE CONTROL SYSTEMS MAGAZINE 23 PEOPLE IN CONTROL � I n this issue of IEEE Control
Techniques for energy conservation in ac motor-driven systems. Final report
Mohan, N.
Techniques for energy conservation of reducing losses in ac motor-driven systems proposed by the technical community in response to surging cost of energy are evaluated and compared. Report objectives are to provide better understanding of underlying principles and to evaluate technical and economic viability of these techniques for various applications. An important aspect considered is the impact on electric utility system in terms of harmonics, power factor of operation, and Electro-Magnetic Interference (EMI). The techniques evaluated are: NASA Power Factor Controller, a simple device for reducing power losses in lightly loaded ac motors; wanlass motor modification, a scheme of reconnecting motor windings with capacitors in series, with the intention of improving the motor efficiencies under all loading conditions; conventional variable frequency solid-state inverters which can control the speed of ac motors by producing adjustable frequency ac voltage, with a significant potential for energy conservation in pumps and air-handling systems; and other variable frequency drives and schemes including cycloconverters, slip-recovery scheme, Exxon Alternating Current Synthesizer, Venturini conversion technique, permanent magnet synchronous motors, and a device called the Phase-Liner. The impact of rapid growth in semiconductors and magnetic materials technologies is also considered.
SP 23.6: A 1.8GHz CMOS Voltage-Controlled Oscillator BehzadRazavi
Razavi, Behzad
SP 23.6: A 1.8GHz CMOS Voltage-Controlled Oscillator BehzadRazavi University of California, Los that limit the tuning range of monolithic LC voltage-controlled oscillators (VCOs), especially at low supply voltages, and introduces circuit techniques that alle- viate this problem. Incorporating such techniques
ECR apparatus with magnetic coil for plasma refractive index control
Berry, L.A.
The present invention describes a technique to control the radial profile of microwave power in an ECR plasma discharge. In order to provide for a uniform plasma density to a specimen, uniform energy absorption by the plasma is desired. By controlling the radial profile of the microwave power transmitted through the microwave window of a reactor, the profile of the transmitted energy to the plasma can be controlled in order to have uniform energy absorption by the plasma. An advantage of controlling the profile using the window transmission characteristics is that variations to the radial profile of microwave power can be made without changing the microwave coupler or reactor design. 9 figures.
ECR apparatus with magnetic coil for plasma refractive index control
Berry, Lee A. (Oak Ridge, TN)
The present invention describes a technique to control the radial profile of microwave power in an ECR plasma discharge. In order to provide for a uniform plasma density to a specimen, uniform energy absorption by the plasma is desired. By controlling the radial profile of the microwave power transmitted through the microwave window of a reactor, the profile of the transmitted energy to the plasma can be controlled in order to have uniform energy absorption by the plasma. An advantage of controlling the profile using the window transmission characteristics is that variations to the radial profile of microwave power can be made without changing the microwave coupler or reactor design.
A Novel Technique for Smearing Links
Johnson, R W
Traditional smearing or blocking techniques serve well to increase the overlap of operators onto physical states but allow for link directions only along lattice axes. Recent attempts to construct more general propagators have shown promise at resolving the higher spin states but still rely on iterative smearing. A new construction is here presented which creates smeared links from (sparse) matrix multiplications, allowing propagation at arbitrary directions. As an application and example, we compute the positive-parity, even-spin glueball spectrum up to spin 6 for pure gauge SU(2) at \\beta=6 in D=2+1.
Technique for fast and efficient hierarchical clustering
Stork, Christopher
A fast and efficient technique for hierarchical clustering of samples in a dataset includes compressing the dataset to reduce a number of variables within each of the samples of the dataset. A nearest neighbor matrix is generated to identify nearest neighbor pairs between the samples based on differences between the variables of the samples. The samples are arranged into a hierarchy that groups the samples based on the nearest neighbor matrix. The hierarchy is rendered to a display to graphically illustrate similarities or differences between the samples.
Geologic flow characterization using tracer techniques
Klett, R. D.; Tyner, C. E.; Hertel, Jr., E. S.
A new tracer flow-test system has been developed for in situ characterization of geologic formations. This report describes two sets of test equipment: one portable and one for testing in deep formations. Equations are derived for in situ detector calibration, raw data reduction, and flow logging. Data analysis techniques are presented for computing porosity and permeability in unconfined isotropic media, and porosity, permeability and fracture characteristics in media with confined or unconfined two-dimensional flow. The effects of tracer pulse spreading due to divergence, dispersion, and porous formations are also included.
Nonconvex programming techniques based on functional moments
Martin, Jacques
) August 1976 ABSTRACT Nonconvex Programming Techniques Based on Functional Moments. (August 1976) / / / Jacques Hartin, Ingenieur Civil des Telecommunications Chairman of Advisory Committee: Dr. H. 0. Hartley In order to evaluate the maximum f+ of a... = ? Atctg ~ 'j V. q V ~ = -tg P V. J We define in the same way (2. 4) V. -1 tg J 'V . J (2. 2) becomes ig . 1$ 1V. X. V 1V, X, V. A J J j J J J 2 Let e . = -1; e = 1, j = 1, 2, . . . , n oj A. = ? Z e j j j e v. is v. x. j' j'' e ! k=0 2...
Particle-Based Mesoscale Hydrodynamic Techniques
Hiroshi Noguchi; Norio Kikuchi; Gerhard Gompper
Dissipative particle dynamics (DPD) and multi-particle collision (MPC) dynamics are powerful tools to study mesoscale hydrodynamic phenomena accompanied by thermal fluctuations. To understand the advantages of these types of mesoscale simulation techniques in more detail, we propose new two methods, which are intermediate between DPD and MPC -- DPD with a multibody thermostat (DPD-MT), and MPC-Langevin dynamics (MPC-LD). The key features are applying a Langevin thermostat to the relative velocities of pairs of particles or multi-particle collisions, and whether or not to employ collision cells. The viscosity of MPC-LD is derived analytically, in very good agreement with the results of numerical simulations.
Well Log Techniques | Open Energy Information
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Category:Data Techniques | Open Energy Information
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Category:Drilling Techniques | Open Energy Information
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Category:Electromagnetic Techniques | Open Energy Information
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Category:Downhole Techniques | Open Energy Information
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Category:Seismic Techniques | Open Energy Information
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Electromagnetic Profiling Techniques | Open Energy Information
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Electromagnetic Sounding Techniques | Open Energy Information
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Mika, R.
This paper describes a computer-base diagnostic control system operating on the PDX Tokamak. The prime function of the system is to control mechanical positioning devices associated with various diagnostics including Thomson Scattering, X-Ray Pulse Height Analyzer, Rotating Scanning Monochromator, Fast Ion Detection Experiment, Bolometers and Plasma Limiters. The diagnostic control system consists of a PDP-11/34 computer, a CAMAC system partitioned between the PDX control room and the PDX machine area, and special electronic control modules developed at PPL. The special modules include a digital closed loop motor controller and user interface control panel for control and status display. A standard control panel was developed for interfacing each system user with the PDP-11/34 computer, through specially developed CAMAC modules.
Wilson, David G. (Tijeras, NM); Robinett, III, Rush D. (Tijeras, NM)
A control system design method and concomitant control system comprising representing a physical apparatus to be controlled as a Hamiltonian system, determining elements of the Hamiltonian system representation which are power generators, power dissipators, and power storage devices, analyzing stability and performance of the Hamiltonian system based on the results of the determining step and determining necessary and sufficient conditions for stability of the Hamiltonian system, creating a stable control system based on the results of the analyzing step, and employing the resulting control system to control the physical apparatus.
Al-Radhi, Adhi Omar
) 50 3-10 Defects per Unit Control Charts (Sudden Increase in Number of Defects) 51 3-11 Defects per Unit Control Charts (Slow Increase in Number of Defects) 52 3-12 O. C. Curves of Fraction Defectives Control Charts. 54 3-13 O. C. Curves.... The exponential smoothing principle was introduced to quality control field in 1959. It was first adapted in the mean control chart [25]. Through this control system, the most recent information is weighted and combined with the weighted past observations. 10...
Gloryhole excavation: Present techniques and future concepts
Stewart, H.R.; Golby, H.M.
Exploration wells drilled offshore from floating structures require blow-out preventors (BOP) at or below the seafloor. In the Beaufort Sea, where water depths are relatively shallow, unprotected BOPs are subject to potential impact from ice features. Currently, to protect the BOP from ice damage, it is installed within unretained excavations (gloryholes) below the seafloor. Since 1980, six gloryholes have been excavated for exploration drilling purposes on behalf of Gulf Canada Resources Inc. (GCRI) in water depths ranging from 18 m to 35 metres. Three of these gloryholes were completed in 1983. Recent changes in the methods used for gloryhole excavations have reduced costs. This paper reviews the excavation techniques used to date and presents a case history of a gloryhole excavated during 1983. Costs are described together with a technical evaluation of the various techniques employed. During the development phase, larger gloryholes are anticipated for well clusters. Modified dredging equipment may well be the most economical method of excavating these large depressions. The concept of ''retained'' gloryholes using a caisson is also discussed.
Impact of seismic resolution on geostatistical techniques
Mukerji, T.; Rio, P.; Mavko, G.M.
Seismic measurements are often incorporated in geostatistical techniques for estimation and simulation of petrophysical properties such as porosity. The good correlation between seismic and rock properties provides a basis for these techniques. Seismic data have a wide spatial coverage not available in log or core data. However, each seismic measurement has a characteristic response function determined by the source-receiver geometry and signal bandwidth. The image response of the seismic measurement gives a filtered version of the true velocity image. Therefore the seismic image we obtain cannot reflect exactly the true seismic velocity at all scales of spatial heterogeneities present in the earth. The seismic response function can be conveniently approximated in the spatial spectral domain using a Born approximation. Our goal is to study how the seismic image response affects the estimation of variograms and spatial scales, and its impact on geostatistical results. Limitations of view angles and signal bandwidth not only smoothes the seismic image, increasing the variogram range, but can also introduce anisotropic spatial structures in the image. We can add value to the seismic data by better characterizing an quantifying these attributes. As an exercise we present example of seismically assisted cosimulation of porosity between wells.
Uncertainty Analysis Technique for OMEGA Dante Measurements
May, M J; Widmann, K; Sorce, C; Park, H; Schneider, M
The Dante is an 18 channel X-ray filtered diode array which records the spectrally and temporally resolved radiation flux from various targets (e.g. hohlraums, etc.) at X-ray energies between 50 eV to 10 keV. It is a main diagnostics installed on the OMEGA laser facility at the Laboratory for Laser Energetics, University of Rochester. The absolute flux is determined from the photometric calibration of the X-ray diodes, filters and mirrors and an unfold algorithm. Understanding the errors on this absolute measurement is critical for understanding hohlraum energetic physics. We present a new method for quantifying the uncertainties on the determined flux using a Monte-Carlo parameter variation technique. This technique combines the uncertainties in both the unfold algorithm and the error from the absolute calibration of each channel into a one sigma Gaussian error function. One thousand test voltage sets are created using these error functions and processed by the unfold algorithm to produce individual spectra and fluxes. Statistical methods are applied to the resultant set of fluxes to estimate error bars on the measurements.
Proceedings of: X Convegno Tecnologie e Sistemi Energetici Complessi, (TESEC), June 2001, Genova, Italy ADVANCED TECHNIQUES FOR SAFETY ANALYSIS APPLIED TO
Tronci, Enrico
, Italy 1 ADVANCED TECHNIQUES FOR SAFETY ANALYSIS APPLIED TO THE GAS TURBINE CONTROL SYSTEM OF ICARO CO of complex computer based systems. Such approaches are applied to the gas turbine control system of ICARO co of the centre of ENEA CR Casaccia. The plant is based on a small gas turbine and has been specifically designed
Monte Carlo techniques applied to PERT networks
McGowan, Lawrence Lee
conceived by Booze, Allen and Hamilton. Tnis concept was replaced by the three estimate concept during the Polaris Submarine Project when it was found that. the one estimate concept did not provide accurate solutions. However, in certain cases where union... on its way to more profitable adaptations. The PERT system is essentially an outgrowth of the Gantt or bar 6 chart concept of controlling time elements in a program. I+ was first formalized in 1956 by the management consultant firm of Booze, Allen...
Generic device controller for accelerator control systems
Mariotti, R.; Buxton, W.; Frankel, R.; Hoff, L.
A new distributed intelligence control system has become operational at the AGS for transport, injection, and acceleration of heavy ions. A brief description of the functionality of the physical devices making up the system is given. An attempt has been made to integrate the devices for accelerator specific interfacing into a standard microprocessor system, namely, the Universal Device Controller (UDC). The main goals for such a generic device controller are to provide: local computing power; flexibility to configure; and real time event handling. The UDC assemblies and software are described. (LEW)
Subhourly wind forecasting techniques for wind turbine operations
Wegley, H.L.; Kosorok, M.R.; Formica, W.J.
Three models for making automated forecasts of subhourly wind and wind power fluctuations were examined to determine the models' appropriateness, accuracy, and reliability in wind forecasting for wind turbine operation. Such automated forecasts appear to have value not only in wind turbine control and operating strategies, but also in improving individual wind turbine control and operating strategies, but also in improving individual wind turbine operating strategies (such as determining when to attempt startup). A simple persistence model, an autoregressive model, and a generalized equivalent Markhov (GEM) model were developed and tested using spring season data from the WKY television tower located near Oklahoma City, Oklahoma. The three models represent a pure measurement approach, a pure statistical method and a statistical-dynamical model, respectively. Forecasting models of wind speed means and measures of deviations about the mean were developed and tested for all three forecasting techniques for the 45-meter level and for the 10-, 30- and 60-minute time intervals. The results of this exploratory study indicate that a persistence-based approach, using onsite measurements, will probably be superior in the 10-minute time frame. The GEM model appears to have the most potential in 30-minute and longer time frames, particularly when forecasting wind speed fluctuations. However, several improvements to the GEM model are suggested. In comparison to the other models, the autoregressive model performed poorly at all time frames; but, it is recommended that this model be upgraded to an autoregressive moving average (ARMA or ARIMA) model. The primary constraint in adapting the forecasting models to the production of wind turbine cluster power output forecasts is the lack of either actual data, or suitable models, for simulating wind turbine cluster performance.
Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]
The Policy ensures that the Department of Energy will use institutional controls in the management of resources, facilities and properties under its control, and in implementing its programmatic responsibilities. Certified 1-28-11.
Generalized Linear Quadratic Control
Gattami, Ather Said
We consider the problem of stochastic finite- and infinite-horizon linear quadratic control under power constraints. The calculations of the optimal control law can be done off-line as in the classical linear quadratic ...
Larson, Richard Winston
Experiments for controls classes like MIT's 2.004 require large lab setups and expensive equipment such as oscilloscopes and function generators. We developed a series of controls experiments based on National Instruments' ...
Painter, John H.
Knowledge-based control is defined here as the management of dynamic systems whose states admit qualitative modeling. Contributions from several disparate disciplines, such as artificial intelligence, the decision sciences, and fuzzy control...
Microcomputers in Process Control�
Vinson, D. R.; Chatterjee, N.
demand control, pipeline pressure control, product rate changes, 5tart-up and shutdown optimization, and time-of-day production rate control. The ultimate objective is for operators to specify a minimum of required parameters and let the computer..., while the computer system is divided into digital/analog conversion gear and the computer system itself. In general, there are four major types of DOC computer compatible baseline control system used today: 1. Pneumatic transmitters, analog...
A novel proportional--integral-derivative control configuration with application to the control of batch distillation
Alvarez-Ramirez, J.; Monroy-Loperena, R.; Cervantes, I.; Morales, A.
The aim of this paper is to propose a novel proportional-integral-derivative (PID) control configuration based on an observer structure. Batch distillation is used as the base case study where the regulated output is the distillate composition. The proposed PID control law is derived in the framework of robust nonlinear control with modeling error compensation techniques. A reduced-order observer is proposed to estimate both the derivative of the regulated output and the underlying modeling error. These observations are subsequently used in a control loop to feedback variations of distillate composition (derivative feedback) and to counteract the effects of modeling errors. It is shown that, under certain conditions, the resulting control law is equivalent to a classical PID controller with an antireset windup scheme. Moreover, the tuning of the controller is performed very easily in terms of a prescribed closed-loop time constant and an estimation time constant. Numerical results are provided for binary and multicomponent separations. Sampled/delayed measurements and several sources of uncertainties are considered in order to provide a realistic test scenario for the proposed control design procedure.
Control Measures: Proper control measures ensure that
Jia, Songtao
during operation & maintenance. Engineering: Warning lights, Shutters/Attenuators, Beam Housings, Interlocks, Laser Curtains, Remote Firing Controls Administrative: Training, Written Standard Operating Procedures (SOPs), Posting Warnings Signs/Labels, & PPE. Personal Protective Equipment (PPE): Laser
Nonlinear modelling of polymer electrolyte membrane fuel cell stack using nonlinear cancellation technique
Barus, R. P. P., E-mail: email@example.com [Engineering Physics, Faculty of Industrial Technology, Institut Teknologi Bandung, Jalan Ganesa 10 Bandung and Centre for Material and Technical Product, Jalan Sangkuriang No. 14 Bandung (Indonesia); Tjokronegoro, H. A.; Leksono, E. [Engineering Physics, Faculty of Industrial Technology, Institut Teknologi Bandung, Jalan Ganesa 10 Bandung (Indonesia); Ismunandar [Chemistry Study, Faculty of Mathematics and Science, Institut Teknologi Bandung, Jalan Ganesa 10 Bandung (Indonesia)
Fuel cells are promising new energy conversion devices that are friendly to the environment. A set of control systems are required in order to operate a fuel cell based power plant system optimally. For the purpose of control system design, an accurate fuel cell stack model in describing the dynamics of the real system is needed. Currently, linear model are widely used for fuel cell stack control purposes, but it has limitations in narrow operation range. While nonlinear models lead to nonlinear control implemnetation whos more complex and hard computing. In this research, nonlinear cancellation technique will be used to transform a nonlinear model into a linear form while maintaining the nonlinear characteristics. The transformation is done by replacing the input of the original model by a certain virtual input that has nonlinear relationship with the original input. Then the equality of the two models is tested by running a series of simulation. Input variation of H2, O2 and H2O as well as disturbance input I (current load) are studied by simulation. The error of comparison between the proposed model and the original nonlinear model are less than 1 %. Thus we can conclude that nonlinear cancellation technique can be used to represent fuel cell nonlinear model in a simple linear form while maintaining the nonlinear characteristics and therefore retain the wide operation range.
Complex Networked Control Systems
buildings, modern control systems are increasingly incorporating communication networks in feedback loops [5Complex Networked Control Systems W e live and operate in a networked world. We drive to work on the performance of feedback control systems [5], [6]. Signifi- cant attention is focused on devising local
Evaluation of energy savings related to building envelope retrofit techniques and ventilation strategies for low energy cooling in
Paris-Sud XI, Universit� de
strategies for low energy cooling in offices and commercial sector Laurent Grignon-Mass�, Dominique Marchio and automatic controls and the use of adequate ventilation strategies show great potential in energy savingsEvaluation of energy savings related to building envelope retrofit techniques and ventilation
Guaranteed stability regions of linear systems with actuator saturation using the low-and-high gain technique
Turner, Matthew C.
constraints. Although its introduction in (Lin & Saberi1993) was fairly modest, it has since been used on predictive control. The low-and-high gain technique was introduced in Lin & Saberi (1995) as a method ensuring that the region in which stability was guaranteed did not shrink. With the work in Lin & Saberi
A Comparison of Digital Signal Extraction Techniques
Cunningham, M; Dowla, F
We compare the performance of two methods of digital filtering to detect a radioactive source moving past a gamma-ray sensor. The first method is the box-car filter, which is a standard method used in the detection of a moving radioactive source. The second method is the matched filter, which takes into account the variation in the number of photons absorbed in a gamma-ray sensor as a source moves past the sensor. We optimize both methods to detect a source moving at 5, 10, 15 and 20 mph, and the receiver-operator characteristics of the two techniques are plotted for comparison. The improvement of the matched filter over the box car filter is 27% at 5 mph and 22% at 10 mph for a 90% probability of detection and an average hours between false alarms equal to 10.
Technique for ship/wake detection
Roskovensky, John K. (Albuquerque, NM)
An automated ship detection technique includes accessing data associated with an image of a portion of Earth. The data includes reflectance values. A first portion of pixels within the image are masked with a cloud and land mask based on spectral flatness of the reflectance values associated with the pixels. A given pixel selected from the first portion of pixels is unmasked when a threshold number of localized pixels surrounding the given pixel are not masked by the cloud and land mask. A spatial variability image is generated based on spatial derivatives of the reflectance values of the pixels which remain unmasked by the cloud and land mask. The spatial variability image is thresholded to identify one or more regions within the image as possible ship detection regions.
Techniques for Intravascular Foreign Body Retrieval
Woodhouse, Joe B.; Uberoi, Raman, E-mail: email@example.com [Oxford University Hospitals (United Kingdom)
As endovascular therapies increase in frequency, the incidence of lost or embolized foreign bodies is increasing. The presence of an intravascular foreign body (IFB) is well recognized to have the potential to cause serious complications. IFB can embolize and impact critical sites such as the heart, with subsequent significant morbidity or mortality. Intravascular foreign bodies most commonly result from embolized central line fragments, but they can originate from many sources, both iatrogenic and noniatrogenic. The percutaneous approach in removing an IFB is widely perceived as the best way to retrieve endovascular foreign bodies. This minimally invasive approach has a high success rate with a low associated morbidity, and it avoids the complications related to open surgical approaches. We examined the characteristics, causes, and incidence of endovascular embolizations and reviewed the various described techniques that have been used to facilitate subsequent explantation of such materials.
Measurement and characterization techniques for thermoelectric materials
Tritt, T.M.
Characterization of thermoelectric materials can pose many problems. A temperature difference can be established across these materials as an electrical current is passed due to the Peltier effect. The thermopower of these materials is quite large and thus large thermal voltages can contribute to many of the measurements necessary to investigate these materials. This paper will discuss the chracterization techniques necessary to investigate these materials and provide an overview of some of the potential systematic errors which can arise. It will also discuss some of the corrections one needs to consider. This should provide an introduction to the characterization and measurement of thermoelectric materials and provide references for a more in depth discussion of the concepts. It should also serve as an indication of the care that must be taken while working with thermoelectric materials.
Imaging techniques utilizing optical fibers and tomography
Wilke, M.; King, N.S.P.; Gray, N.; Johnson, D.; Esquibel, D.; Nedrow, P.; Ishiwata, S.
Two-dimensional, time-dependent images generated by neutrons, gamma rays, and x-rays incident on fast scintillators are relayed to streak and video cameras over optical fibers. Three dimensions, two spatial and one temporal, have been reduced to two, one in space and time utilizing sampling methods permitting reconstruction of a time-dependent, two-dimensional image subsequent to data recording. The manner in which the sampling is done optimized the ability to reconstruct the image via a maximization of entropy algorithm. This method uses four linear fiber optic arrays typically 30 meters long and up to 35 elements each. A further refinement of this technique collapses the linear array information into four single fibers by wavelength multiplexing. This permits economical transmission of the data over kilometer distances to the recording equipment.
Techniques and methods in nuclear materials traceability
Persiani, P.J.
The nonproliferation community is currently addressing concerns that the access to special nuclear materials may increase the illicit trafficking in weapons-usable materials from civil and/or weapons material stores and/or fuel cycles systems. Illicit nuclear traffic usually involves reduced quantities of nuclear materials perhaps as samplings of a potential protracted diversionary flow from sources to users. To counter illicit nuclear transactions requires the development of techniques and methods in nuclear material traceability as an important phase of a broad forensic analysis capability. This report discusses how isotopic signatures and correlation methods were applied to determine the origins of Highly Enriched Uranium (HEU) and Plutonium samples reported as illicit trafficking in nuclear materials.
Physical protection philosophy and techniques in Sweden
Dufva, B.
The circumstances for the protection of nuclear power plants are special in Sweden. A very important factor is that armed guards at the facilities are alien to the Swedish society. They do not use them. The Swedish concept of physical protection accepts that the aggressor will get into the facility. With this in mind, the Swedish Nuclear Power Inspectorate (SKI) has established the policy that administrative, technical, and organizational measures will be directed toward preventing an aggressor from damaging the reactor, even if he has occupied the facility. In addition, the best conditions possible shall be established for the operator and the police to reoccupy the plant. The author believes this policy is different from that of many other countries. Therefore, he focusses on the Swedish philosophy and techniques for the physical protection of nuclear power plants.
Techniques for determining physical zones of influence
Hamann, Hendrik F; Lopez-Marrero, Vanessa
Techniques for analyzing flow of a quantity in a given domain are provided. In one aspect, a method for modeling regions in a domain affected by a flow of a quantity is provided which includes the following steps. A physical representation of the domain is provided. A grid that contains a plurality of grid-points in the domain is created. Sources are identified in the domain. Given a vector field that defines a direction of flow of the quantity within the domain, a boundary value problem is defined for each of one or more of the sources identified in the domain. Each of the boundary value problems is solved numerically to obtain a solution for the boundary value problems at each of the grid-points. The boundary problem solutions are post-processed to model the regions affected by the flow of the quantity on the physical representation of the domain.
Artificial Intelligence Techniques for Steam Generator Modelling
Wright, Sarah
This paper investigates the use of different Artificial Intelligence methods to predict the values of several continuous variables from a Steam Generator. The objective was to determine how the different artificial intelligence methods performed in making predictions on the given dataset. The artificial intelligence methods evaluated were Neural Networks, Support Vector Machines, and Adaptive Neuro-Fuzzy Inference Systems. The types of neural networks investigated were Multi-Layer Perceptions, and Radial Basis Function. Bayesian and committee techniques were applied to these neural networks. Each of the AI methods considered was simulated in Matlab. The results of the simulations showed that all the AI methods were capable of predicting the Steam Generator data reasonably accurately. However, the Adaptive Neuro-Fuzzy Inference system out performed the other methods in terms of accuracy and ease of implementation, while still achieving a fast execution time as well as a reasonable training time.
Demand Controlled Ventilation for Improved Humidity Control
Rogers, J. K.
Demand Controlled Ventilation for Improved Humidity Control James K. Rogers, P.E. One Blacksmith Road Chelmsford, Massachusetts ABSTRACT Recently introduced technology makes it possible to continuously monitor for humidity in numerous... is brought in for ventilation. The high "latent load" inherent in this hot, humid outside air is often the reason for installing excess chiller capacity and the cause of peak power demands. Recent concerns over poor indoor air quality (IAQ) due...
Laboratory testing of closure cap repair techniques
Persoff, P.; Moridis, G. [Lawrence Berkeley National Lab., CA (United States); Tuck, D.M. [Westinghouse Savannah River Company, Aiken, SC (United States)] [and others
Landfill design requires a low permeability closure cap as well as a low permeability liner. The Savannah River Site, in South Carolina, has approximately 85 acres of mixed waste landfills covered with compacted kaolin clay. Maintaining low permeability of the clay cap requires both that the permeability of the compacted clay itself remain low and that the integrity of the barrier be maintained. Barrier breaches typically result from penetration by roots or animals, and especially cracks caused by uneven settling or desiccation. In this study, clay layers, 0.81 m in diameter and 7.6 cm thick, were compacted in 7 lysimeters to simulate closure caps. The hydraulic conductivity of each layer was measured, and the compacted clay layers (CCL`s) were cracked by drying. Then various repair techniques were applied and the effectiveness of each repair was assessed by remeasuring the hydraulic conductivity. Finally the repaired CCL was again dried and measured to determine how the repair responded to the conditions that caused the original failure. For a full report of this investigation see Persoff et al. Six repair techniques have been tested, four of which involve the use of injectable barrier liquids colloidal silica (CS) and polysiloxane (PSX) described below: (I) covering the crack with a bentonite geosynthetic clay liner (GCL), (ii) recompaction of new kaolinite at STD+3 moisture content joined to existing kaolinite that had dried and shrunk, (iii) direct injection of colloidal silica to a crack, (iv) injection of colloidal silica (CS) to wells in an overlying sand layer, (v) direct injection of polysiloxane to a crack, and (vi), injection of polysiloxane (PSX) to wells in an overlying soil layer.
Directional drilling equipment and techniques for deep hot granite wells
Brittenham, T.L.; Sursen, G.; Neudecker, J.W.; Rowley, J.C.; Williams, R.E.
Conventional directional drilling technology has been extended and modified to drill the first well of a subsurface geothermal energy extraction system at the Fenton Hill, New Mexico, Hot dry Rock (HDR) experimental site. Completing the first of a two-wellbore HDR system has resulted in the definition of operational limitations of many conventional directional drilling tools, instrumentation and techniques. The successful completion of the first wellbore, Energy Extraction Well No. 2 (EE-2), to a measured depth of 15,300 ft (4.7 km) in granite reservoir rock with a bottomhole temperature of 530/sup 0/F (275/sup 0/C) required the development of a new high temperature downhole motor and modification of existing wireline-conveyed steering tool systems. Conventional rotary-driven directional assemblies were successfully modified to accommodate the very hard and abrasive rock encountered while drilling nearly 8500 ft (2.6 km) of directional hole to a final inclination of 35/sup 0/ from the vertical at a controlled azimuthal orientation.
Gooneratne et al. A Composite Matching Technique A COMPOSITE MATCHING TECHNIQUE FOR SEMANTIC BASED
Rubinstein, Benjamin
WEB SERVICE DISCOVERY Nalaka Gooneratne 1, Zahir Tari 1 & Gregory Craske 1 1 School of Computer Science and Information Technology, RMIT University ABSTRACT: Current web service composition techniques compose web services based on their functionality. They do not consider user constraints. We propose
Behavior Modification as a Sustainable Design Technique
Norwood, E.
ESL-KT-13-12-25 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 Empowerment: Don�t control people, enable them to change Real time Granular Intuitive Engagement: They wont care unless they are engaged..., they must also care. Real Awareness How To Manifest Awareness ESL-KT-13-12-25 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 What is Curb? ESL-KT-13-12-25 CATEE 2013: Clean Air Through Energy Efficiency...
Midcontinent well operators learn advantages of coiled-tubing techniques
Lyle, D.
From well cleanup to velocity strings to squeeze jobs, more Midcontinent operators are adding coiled-tubing methods to their oilfield techniques. The advantages of these techniques are discussed.
A Computational Study of Feeding Rules and Yield Improvement Techniques
Beckermann, Christoph
A Computational Study of Feeding Rules and Yield Improvement Techniques Christoph Beckermann improvement techniques is presented. The computer simulations were performed using a commercial solidification chills (termed passive methods), and active heating and cooling are presented and compared. The benefits
Power Modeling and Thermal Management Techniques for Manycores
Simunic, Tajana
Power Modeling and Thermal Management Techniques for Manycores Rajib Nath Computer Science number of cores in manycore archi- tectures, along with technology scaling, results in high power densities and thermal issues on the die. To explore innovative thermal management techniques
5.301 Chemistry Laboratory Techniques, January IAP 2004
Tabacco, Sarah
This course is an intensive introduction to the techniques of experimental chemistry and gives first year students an opportunity to learn and master the basic chemistry lab techniques for carrying out experiments. Students ...
A Simple Technique for Islanding Detection with Negligible Nondetection Zone
Kirtley Jr, James L.
Although active islanding detection techniques have smaller nondetection zones than passive techniques, active methods could degrade the system power quality and are not as simple and easy to implement as passive methods. ...
Multi-spectral glucose sensing using a polarimetric differencing technique�
Michael, Mathew
including frequent self monitoring of blood glucose (SNMG) levels is required. Current SMBG techniques are invasive, painful, and prone to error. A novel multispectral, closed loop polarimetric system employing a robust, differencing technique is presented...
Some applications of pipelining techniques in parallel scientific computing�
Deng, Yuanhua
In this thesis, we study the applicability of pipelining techniques to the development of parallel algorithms for scientific computation. General principles for pipelining techniques are discussed and two applications, Gram-Schmidt orthogonalization...
Some applications of pipelining techniques in parallel scientific computing
Deng, Yuanhua
In this thesis, we study the applicability of pipelining techniques to the development of parallel algorithms for scientific computation. General principles for pipelining techniques are discussed and two applications, Gram-Schmidt orthogonalization...
Survey and evaluation of techniques to augment convective heat transfer
Bergles A. E.
This report presents a survey and evaluation of the numerous techniques which have been shown to augment convective heat transfer. These techniques are: surface promoters, including roughness and treatment; displaced ...
Biophysical modeling of hemodynamic-based neuroimaging techniques
Gagnon, Louis, 1984-
Two different hemodynamic-based neuroimaging techniques were studied in this work. Near-Infrared Spectroscopy (NIRS) is a promising technique to measure cerebral hemodynamics in a clinical setting due to its potential for ...
Ultrafast control of strong-field electron dynamics in solids
Vladislav S. Yakovlev; Stanislav Yu. Kruchinin; Tim Paasch-Colberg; Mark I. Stockman; Ferenc Krausz
We review theoretical foundations and some recent progress related to the quest of controlling the motion of charge carriers with intense laser pulses and optical waveforms. The tools and techniques of attosecond science enable detailed investigations of a relatively unexplored regime of nondestructive strong-field effects. Such extremely nonlinear effects may be utilized to steer electron motion with precisely controlled optical fields and switch electric currents at a rate that is far beyond the capabilities of conventional electronics.
Experimental results from a network-assisted PID controller
Curtiss, P.S. [Univ. of Colorado, Boulder, CO (United States). Joint Center for Energy Management
The results presented here are a continuation of studies on a neural-network-based controller. Part 1 is a summary of the previous studies, and Part 2 presents new results and offers some novel techniques used for training the network and making the entire package easier to use. The two major additions are (1) efficient use of training data for dramatically reducing memory requirements and (2) incorporation of a PID algorithm for performing control during training periods.
Control and optimization system
Xinsheng, Lou
A system for optimizing a power plant includes a chemical loop having an input for receiving an input parameter (270) and an output for outputting an output parameter (280), a control system operably connected to the chemical loop and having a multiple controller part (230) comprising a model-free controller. The control system receives the output parameter (280), optimizes the input parameter (270) based on the received output parameter (280), and outputs an optimized input parameter (270) to the input of the chemical loop to control a process of the chemical loop in an optimized manner.
Hammerstrom, Donald J
An advanced electric water heater control system that interfaces with a high temperature cut-off thermostat and an upper regulating thermostat. The system includes a control module that is electrically connected to the high-temperature cut-off thermostat and the upper regulating thermostat. The control module includes a switch to open or close the high-temperature cut-off thermostat and the upper regulating thermostat. The control module further includes circuitry configured to control said switch in response to a signal selected from the group of an autonomous signal, a communicated signal, and combinations thereof.
Efficiently Controllable Graphs
Can Gokler; Kevin Thompson; Peter Shor; Seth Lloyd
We show that universal quantum computation can be performed efficiently on quantum networks while the fraction of controlled subsystems vanishes as the network grows larger. We provide examples of quantum spin network families admitting polynomial quantum gate complexity with a vanishing fraction of controlled spins. We define a new family of graphs, the efficiently controllable family, which admits efficient computation with vanishing fraction of controls. We explore generalizations to percolation clusters, fractals and random graphs. We show that the classical computational complexity of estimating the ground state of Hamiltonians described by controllable graphs is polynomial in the number of subsystems/qubits.
Benchmarking Outreach and Data Collection Techniques for External Portfolios
Broader source: Energy.gov [DOE]
This document contains the transcript for the Benchmarking Outreach and Data Collection Techniques webinar, held on April 25, 2013.
High-level Functions for Modern Control Systems: A Practical Example
Varela, F; Golonka, P; Gonzalez-Berges, M; Petrova, L B
Modern control systems make wide usage of different IT technologies and complex computational techniques to render the data gathered accessible from different locations and devices, as well as to understand and even predict the behaviour of the systems under supervision.
Characterization of Two-Photon Excitation: Coherent Control and Nonlinear Propagation in Transparent Media�
Poudel, Milan Prasad
Coherent control of laser induced processes is based on the quantum interference among multiple excitation pathways. Progress in the field has been fueled by advances in pulse shaping techniques, allowing modulation of phase and amplitude across...
Coordinating Inventory Control and Pricing Strategies with Random Demand and Fixed
Chen, Xin
Coordinating Inventory Control and Pricing Strategies with Random Demand and Fixed Ordering Cost, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 1. Introduction Traditional inventory strategies to manage their inventory effectively. For example, techniques such as revenue management have
Quality Control of WSR-88D Reflectivity Data V Lakshmanan, Kurt Hondl, Gregory Stumpf, Travis Smith
Lakshmanan, Valliappa
Quality Control of WSR-88D Reflectivity Data V Lakshmanan, Kurt Hondl, Gregory Stumpf, Travis Smith this to compare our technique. · Steiner and Smith, from Princeton University, developed a rule base. Similar
Extending the human controller methodology in systems- Theoretic Process Analysis (STPA)
Thornberry. Cameron L. (Cameron Louis)
Traditional hazard analysis techniques are grounded in reliability theory and analyze the human controller-if at all-in terms of estimated or calculated probabilities of failure. Characterizing sub-optimal human performance ...
Variable Speed Drive Volumetric Tracking (VSDVT) for Airflow Control in Variable Air Volume (VAV) Systems�
Liu, M.
this method by integrating it with the static pressure reset techniques to prevent malfunctioning under several typical building operating problems. Unfortunately, this method can not be used in buildings which have pneumatic terminal box controllers...
Who Will Control U.S. Agriculture? A Series of Six Leaflets.
Sundquist, W. B.; Guither, Harold D.; Breimyer, Harold F.; Flinchbaugh, Barry L.; Rhodes, V. James; Kyle, Leonard R.; Knutson, Ronald D.; Black, William E.; Spitze, Robert G. F.; Christiansen, Martin; Farris, Paul L.; Bottum, J. Carroll
and training requirements for gaining required managerial skills? If these re- quirements are high they will limit the number of producers using such techniques, thus concentrat- ing control among fewer firms. 4. What is the extent of linkage between...
Primary crossflow vortices, secondary absolute instabilities and their control in the rotating-disk boundary layer
Paris-Sud XI, Universit� de
Primary crossflow vortices, secondary absolute instabilities and their control in the rotating patterns of crossflow vortices are derived by employing asymptotic techniques. This approach accounts three-dimensional velocity profiles, are subject to inviscid crossflow in- stabilities and rapidly
A Goal-Directed Modeling Technique towards Business Process
Perry, Dewayne E.
A Goal-Directed Modeling Technique towards Business Process Yuqun Zhang, Dewayne E. Perry Center--The modeling techniques for business process are mostly graphics-based, that is argued to be simplified when- plore the properties of the business processes under this modeling technique, we define a set of metrics
Prof.dr. Nico Groenendijk Financing Techniques for
Twente, Universiteit
Prof.dr. Nico Groenendijk Financing Techniques for Brownfield Regeneration - A practical guide selfguiding trail. REVIT revitalising industrial sites #12;FINANCING TECHNIQUES FOR BROWNFIELD REGENERATION 2006 #12;FINANCING TECHNIQUES FOR BROWNFIELD REGENERATION. A PRACTICAL GUIDE REVIT CCI 2, JUNE 2006 2
Etching radical controlled gas chopped deep reactive ion etching
Olynick, Deidre; Rangelow, Ivo; Chao, Weilun
A method for silicon micromachining techniques based on high aspect ratio reactive ion etching with gas chopping has been developed capable of producing essentially scallop-free, smooth, sidewall surfaces. The method uses precisely controlled, alternated (or chopped) gas flow of the etching and deposition gas precursors to produce a controllable sidewall passivation capable of high anisotropy. The dynamic control of sidewall passivation is achieved by carefully controlling fluorine radical presence with moderator gasses, such as CH.sub.4 and controlling the passivation rate and stoichiometry using a CF.sub.2 source. In this manner, sidewall polymer deposition thicknesses are very well controlled, reducing sidewall ripples to very small levels. By combining inductively coupled plasmas with controlled fluorocarbon chemistry, good control of vertical structures with very low sidewall roughness may be produced. Results show silicon features with an aspect ratio of 20:1 for 10 nm features with applicability to nano-applications in the sub-50 nm regime. By comparison, previous traditional gas chopping techniques have produced rippled or scalloped sidewalls in a range of 50 to 100 nm roughness.
Looking at pollution control in a new light: Photochemistry for a cleaner environment
This phamphet, from the National Renewable Energy Laboratory and Sandia National Laboratory, describes a major new development in the field of photochemistry. The NREL/Sandia team has developed a pollution control technique - photocatalytic oxidation (PCO) that uses the energy in light to destroy environmental contaminants. Applicable as both a waste clean-up and a pollution control technique, PCP could help thousands of businesses comply with environmental regulations.
Optimization of control parameters for isolated and coordinated actuated signal systems
Koothrappally, Joseph
and additions to existing traffic control techniques. A new simulation model, called TEXSIM, which takes full advantage of the latest programming standards and techniques, was developed during this effort. The new model is used to identify patterns.... It is obvious that if the advantages of actuation and coordination could be combined, then such systems would be both efficient and responsive. However, complications introduced by the probabilistic response of actuated controllers to variations in traffic...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Export Control SHARE Export Control ORNL's Nuclear Security and Isotope Technology Division Export Control Team promotes the U.S. nonproliferation agenda by providing policy...
Controls for TTS identification using PET A series of controls were implemented in order to evaluate the potential contamination by internal priming in the
Jordan, King
Controls for TTS identification using PET A series of controls were implemented in order to evaluate the potential contamination by internal priming in the set of PET-characterized TTS described here. In particular, Alu sequences contain two A-rich regions, the longer at their 3'-ends. As the PET technique
Determining Plutonium Mass in Spent Fuel with Nondestructive Assay Techniques NGSI Research Overview and Update on NDA Techniques
A., V. Mozin, S.J. Tobin, L.W. Cambell, J.R. Cheatham, C.R. Freeman, C.J. Gesh,
Spent Fuel Library for Assessing Varied Nondestructive Assay Techniques for Nuclear Safeguards,� Advances in Nuclear Fuel Management
Modeling and control of thermostatically controlled loads
Backhaus, Scott N [Los Alamos National Laboratory; Sinitsyn, Nikolai [Los Alamos National Laboratory; Kundu, S. [UNIV OF MICHIGAN; Hiskens, I. [UNIV OF MICHIGAN
As the penetration of intermittent energy sources grows substantially, loads will be required to play an increasingly important role in compensating the fast time-scale fluctuations in generated power. Recent numerical modeling of thermostatically controlled loads (TCLs) has demonstrated that such load following is feasible, but analytical models that satisfactorily quantify the aggregate power consumption of a group of TCLs are desired to enable controller design. We develop such a model for the aggregate power response of a homogeneous population of TCLs to uniform variation of all TCL setpoints. A linearized model of the response is derived, and a linear quadratic regulator (LQR) has been designed. Using the TCL setpoint as the control input, the LQR enables aggregate power to track reference signals that exhibit step, ramp and sinusoidal variations. Although much of the work assumes a homogeneous population of TCLs with deterministic dynamics, we also propose a method for probing the dynamics of systems where load characteristics are not well known.
Development of solidification technique for dredged sediments
Yamasaki, Shoichi [Aoki Marine Co., Ltd., Fukushima, Osaka (Japan); Yasui, Hiroshi [San O Co., Ltd., Kyoto (Japan); Fukue, Masaharu [Tokai Univ., Shimizu (Japan). Marine Science and Technology
The sediments deposited on the bottoms of seas, lakes, and rivers can be contaminated with hazardous and toxic substances as a result of the discharge of human activities. Therefore, since the natural remediation process cannot be expected, contaminated or polluted as well as highly organic sediments must be treated as waste and be properly disposed for human health and environmental protection. One method of disposal may be to remove the sediments by dredging and to treat them with a proper technique. The main problems in the dredging method are as follows: (1) since sediments usually have very high water content, it is necessary to decrease the volume and solidify them for the next procedure, e.g., landfill; (2) the leachates from the sediments should be treated also. It is required that the water to be discharged be kept at a quality satisfying the level of standards. This paper describes an experimental study using a solidification system performed for the cleanup of the bottom of a river. To promote the solidification of the system, several agents, such as lime, cement, polymer, resin, etc., were used. The results show that these agents strongly influence the solidification characteristics of the sediments and the quality of the leachate from the sediments.
Radar transponder apparatus and signal processing technique
Axline, Jr., Robert M. (Albuquerque, NM); Sloan, George R. (Albuquerque, NM); Spalding, Richard E. (Albuquerque, NM)
An active, phase-coded, time-grating transponder and a synthetic-aperture radar (SAR) and signal processor means, in combination, allow the recognition and location of the transponder (tag) in the SAR image and allow communication of information messages from the transponder to the SAR. The SAR is an illuminating radar having special processing modifications in an image-formation processor to receive an echo from a remote transponder, after the transponder receives and retransmits the SAR illuminations, and to enhance the transponder's echo relative to surrounding ground clutter by recognizing special transponder modulations from phase-shifted from the transponder retransmissions. The remote radio-frequency tag also transmits information to the SAR through a single antenna that also serves to receive the SAR illuminations. Unique tag-modulation and SAR signal processing techniques, in combination, allow the detection and precise geographical location of the tag through the reduction of interfering signals from ground clutter, and allow communication of environmental and status information from said tag to be communicated to said SAR.
Novel techniques applied to polymer lifetime predictions
Gillen, K.T.; Wise, J.; Clough, R.L.
A study aimed at testing the Arrhenius life prediction approach is described. After aging elastomeric materials at several elevated (accelerated) temperatures, a modulus profiling apparatus was used to demonstrate the complicated diffusion-limited oxidation anomalies are typically present under accelerated oven-aging conditions. By using surface modulus results (oxidation less to a monotonic increase in modulus), estimates are made of the true activation energy (E{sub a}) appropriate to the oxidation reactions dominating degradation. Even though macroscopic properties should be influenced by the diffusion-limited oxidation complications, ultimate tensile elongation results were found to be correlated to the true E{sub a}. This implies that cracks initiate at the hardened surface of the material and then quickly propagate through the less oxidized interior. If values of E{sub a} obtained from accelerated exposures can be determined and rationalized, another important question involves the Arrhenius assumption that E{sub a} remains constant in the extrapolation region. Preliminary data from two ultra-sensitive techniques (oxygen consumption and microcalorimetry) aimed at testing this fundamental assumption are described.
Nonlinear regularization techniques for seismic tomography
Loris, I. [Mathematics Department, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels (Belgium)], E-mail: firstname.lastname@example.com; Douma, H. [Department of Geosciences, Princeton University, Guyot Hall, Washington Road, Princeton, NJ 08544 (United States); Nolet, G. [Geosciences Azur, Universite de Nice-Sophia Antipolis, CNRS/IRD, 250 Rue Albert Einstein, Sophia Antipolis 06560 (France); Daubechies, I. [Program in Applied and Computational Mathematics, Princeton University, Fine Hall, Washington Road, Princeton, NJ 08544 (United States); Regone, C. [BP America Inc., 501 Westlake Park Blvd., Houston, TX 77079 (United States)
The effects of several nonlinear regularization techniques are discussed in the framework of 3D seismic tomography. Traditional, linear, l{sub 2} penalties are compared to so-called sparsity promoting l{sub 1} and l{sub 0} penalties, and a total variation penalty. Which of these algorithms is judged optimal depends on the specific requirements of the scientific experiment. If the correct reproduction of model amplitudes is important, classical damping towards a smooth model using an l{sub 2} norm works almost as well as minimizing the total variation but is much more efficient. If gradients (edges of anomalies) should be resolved with a minimum of distortion, we prefer l{sub 1} damping of Daubechies-4 wavelet coefficients. It has the additional advantage of yielding a noiseless reconstruction, contrary to simple l{sub 2} minimization ('Tikhonov regularization') which should be avoided. In some of our examples, the l{sub 0} method produced notable artifacts. In addition we show how nonlinear l{sub 1} methods for finding sparse models can be competitive in speed with the widely used l{sub 2} methods, certainly under noisy conditions, so that there is no need to shun l{sub 1} penalizations.
Techniques calm fear of imaging machine
Van Pelt, D.
Magnetic resonance imaging has become a valuable tool in diagnosing diseases, and the imaging devices are now used as often as 2 million times a year in the United States. But as many as 10 percent of patients advised to undergo the procedure cannot because they become overwhelmed with claustrophobialike fear triggered by having to lie motionless in the machine's tunnel-like cylinder for about 45 minutes. To counteract this fear, several hospitals now practice various techniques to help reduce the feelings of confinement. One popular method is to give a patient special eyeglasses that allow him to look beyond his feet and see the tunnel opening. Other glasses use mirrors to direct the patient's vision out the back of the unit to large wilderness photographs or murals that simulate a sense of spaciousness. Even a basic item like a set of headphones that plays music can often distract a patient, and technicians frequently hold a patient's hand or foot during the procedure. Another trick is to invite family members and friends to remain with the patient during the scan to provide company and reassurance.
Ultrafast control of donor-bound electron spins with single detuned optical pulses
Loss, Daniel
LETTERS Ultrafast control of donor-bound electron spins with single detuned optical pulses KAI on microwave sources--can be attained with broadband optical pulses. One promising ultrafast technique uses single broadband pulses detuned from resonance in a three-level system4 . This technique is robust
June 27, 2003 Visualization Techniques for Personal Tasks on Mobile Computers Page 1 Visualization Techniques for Personal
Tominski, Christian
on mobile devices #12;June 27, 2003 Visualization Techniques for Personal Tasks on Mobile Computers Page 4June 27, 2003 Visualization Techniques for Personal Tasks on Mobile Computers Page 1 Visualization Techniques for Personal Tasks on Mobile Computers Gerald Bieber Fraunhofer Institute for Computer Graphics
Advanced metering techniques in the federal sector
Szydlowski, R.F.; Chvala, W.D. Jr.; Halverson, M.A.
The lack of utility metering in the federal sector has hampered introduction of direct billing of individual activities at most military installations. Direct billing will produce accountability for the amount of energy used and is a positive step toward self-directed energy conservation. For many installations, automatic meter reading (AMR) is a cost-effective way to increase the number of meters while reducing labor requirements and providing energy conservation analysis capabilities. The communications technology used by some of the AMR systems provides other demand-side management (DSM) capabilities. This paper summarizes the characteristics and relative merits of several AMR/DSM technologies that may be appropriate for the federal sector. A case study of an AMR system being installed at Fort Irwin, California, describes a cost-effective two-way radio communication system used for meter reading and load control.
Dynamical tunneling and control
Srihari Keshavamurthy
This article summarizes the recent work on the influence of dynamical tunneling on the control of quantum systems. Specifically, two examples are discussed. In the first, it is shown that the bichromatic control of tunneling in a driven double well system is hampered by the phenomenon of chaos-assisted tunneling. The bichromatic control landscape exhibits several regions indicating lack of control with every such region involving chaos-assisted tunneling. The second example illustrates the failure of controlling the dissociation dynamics of a driven Morse oscillator due to the phenomenon of resonance-assisted tunneling. In particular, attempts to control the dissociation dynamics by rebuilding local phase space barriers are foiled due to resonance-assisted tunneling.
Cawley, William E. (Phoenix, AZ); Warnick, Robert F. (Pasco, WA)
1. In a nuclear reactor incorporating a plurality of columns of tubular fuel elements disposed in horizontal tubes in a mass of graphite wherein water flows through the tubes to cool the fuel elements, the improvement comprising at least one control column disposed in a horizontal tube including fewer fuel elements than in a normal column of fuel elements and tubular control elements disposed at both ends of said control column, and means for varying the horizontal displacement of the control column comprising a winch at the upstream end of the control column and a cable extending through the fuel and control elements and attached to the element at the downstream end of the column.
Plummer, D.A.
The plasma kinetic temperature and density changes, each per an injected fuel density rate increment, control the energy supplied by a thermonuclear fusion reactor in a power production cycle. This could include simultaneously coupled control objectives for plasma current, horizontal and vertical position, shape and burn control. The minimum number of measurements required, use of indirect (not plasma parameters) system measurements, and distributed control procedures for burn control are to be verifiable in a time dependent systems code. The International Thermonuclear Experimental Reactor (ITER) has the need to feedback control both the fusion output power and the driven plasma current, while avoiding damage to diverter plates. The system engineering of fusion reactors must be performed to assure their development expeditiously and effectively by considering reliability, availability, maintainability, environmental impact, health and safety, and cost.
Cawley, W.E.; Warnick, R.F.
In a nuclear reactor incorporating a plurality of columns of tubular fuel elements disposed in horizontal tubes in a mass of graphite wherein water flows through the tubes to cool the fuel elements, the improvement comprising at least one control column disposed in a horizontal tube including fewer fuel elements than in a normal column of fuel elements and tubular control elements disposed at both ends of said control column, and means for varying the horizontal displacement of the control column comprising a winch at the upstream end of the control column and a cable extending through the fuel and control elements and attached to the element at the downstream end of the column.
Fuzzy logic controller optimization
Sepe, Jr., Raymond B; Miller, John Michael
A method is provided for optimizing a rotating induction machine system fuzzy logic controller. The fuzzy logic controller has at least one input and at least one output. Each input accepts a machine system operating parameter. Each output produces at least one machine system control parameter. The fuzzy logic controller generates each output based on at least one input and on fuzzy logic decision parameters. Optimization begins by obtaining a set of data relating each control parameter to at least one operating parameter for each machine operating region. A model is constructed for each machine operating region based on the machine operating region data obtained. The fuzzy logic controller is simulated with at least one created model in a feedback loop from a fuzzy logic output to a fuzzy logic input. Fuzzy logic decision parameters are optimized based on the simulation.
Interactive Control of Nonlinear Projection for Complex Animated Scenes
Toronto, University of
. This thesis presents techniques for creating interactive nonlinear projections of complex scene geometryInteractive Control of Nonlinear Projection for Complex Animated Scenes by Patrick Coleman A thesis of Nonlinear Projection for Complex Animated Scenes Patrick Coleman Master of Science Graduate Department
An Integrated Architecture for Demand Response Communications and Control
Gross, George
An Integrated Architecture for Demand Response Communications and Control Michael LeMay, Rajesh for the MGA and ZigBee wireless communications. Index Terms Demand Response, Advanced Meter Infrastructure. In principle this can be done with demand response techniques in which electricity users take measures