1. A neural network circuitry, wherein a portion of the neural network circuitry comprises: a first array circuitry having a first number of neurons, wherein the dendrite of each neuron of the first array circuitry is provided for receiving an input signal indicating that a measured parameter gets closer to a predetermined value assigned to said neuron; a second array circuitry having a second number of neurons, the dendrite of each neuron of the second array circuitry forming an excitatory Spike-Timing-Dependent-Plasticity (STDP) synapse with the axon of a plurality of neurons of the first array circuitry; and the dendrite of each neuron of the second array circuitry forming an excitatory Spike-Timing-Dependent-Plasticity (STDP) synapse with the axon of neighboring neurons of the second array circuitry.