class_docstr: NCV (Nearly-Constant Velocity) dynamic model. May be subclassed, e.g., with
  CWNA (Continuous White Noise Acceleration) or DWNA (Discrete White Noise
  Acceleration).
  
  :param dimension: native state dimension.
  :param sa2: variance of acceleration. Usually chosen so that the standard
        deviation is roughly half of the max acceleration one would ever
        expect to observe.
class_docstr_tok: ["NCV","(","Nearly-Constant","Velocity",")","dynamic","model",".","May","be","subclassed",",","e.g.",",","with","CWNA","(","Continuous","White","Noise","Acceleration",")","or","DWNA","(","Discrete","White","Noise","Acceleration",")",".",":","param","dimension",":","native","state","dimension",".",":","param","sa2",":","variance","of","acceleration",".","Usually","chosen","so","that","the","standard","deviation","is","roughly","half","of","the","max","acceleration","one","would","ever","expect","to","observe","."]
docstr: Compute and return PV state from native state. Useful for combining
  state estimates of different types in IMM (Interacting Multiple Model)
  filtering.
  
  :param x: native state estimate mean.
  :return: PV state estimate mean.
docstr_tok: ["Compute","and","return","PV","state","from","native","state",".","Useful","for","combining","state","estimates","of","different","types","in","IMM","(","Interacting","Multiple","Model",")","filtering",".",":","param","x",":","native","state","estimate","mean",".",":","return",":","PV","state","estimate","mean","."]
code: def mean2pv(self, x):
      """
      Compute and return PV state from native state. Useful for combining
      state estimates of different types in IMM (Interacting Multiple Model)
      filtering.
  
      :param x: native state estimate mean.
      :return: PV state estimate mean.
      """
      return x
  
imports: from abc import ABCMeta, abstractmethod
  import torch
  from torch import nn
  from torch.nn import Parameter
  import pyro.distributions
  from pyro.distributions.util import eye_like
label_desc: Use image node_id 3 for calling the Ncv obj's underlying member method code with example usage: obj.mean2pv(x) and returns: x