NEURONAL DYNAMICS I:ACTIVATIONS AND SIGNALS BIOLOGICAL ACTIVATIONS AND SIGNALS Competitive Neuronal Signal The neuron "wins"at time t if S(x())=1,"loses"if S(x())=1 and otherwise possesses a fuzzy win-loss status between 0 an 1. a.Binary signal functions [0,1] b.Bipolar signal functions:[-1,1] McCulloch-Pitts (M-P)neurons logical signal function Binary Bipolar S(x)= 1212 BIOLOGICAL ACTIVATIONS AND SIGNALS Competitive Neuronal Signal 1 1 2 1 1 − +  = + = −cx −cx e S x e S(x) ( ) logical signal function ( Binary  Bipolar ) The neuron “wins” at time t if , “loses” if and otherwise possesses a fuzzy win-loss status between 0 an 1. a. Binary signal functions : [0,1] b. Bipolar signal functions : [-1,1] McCulloch—Pitts (M—P) neurons NEURONAL DYNAMICS Ⅰ: ACTIVATIONS AND SIGNALS S(x(t)) =1 S(x(t)) =1