BIOLOGICAL ACTIVATIONS AND SIGNALS Competitive Neuronal Signal The neuron“wins”at time t if s(x(t)=l,loses”ifS(x(t)=0 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)= 1e。-1 2BIOLOGICAL 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 S(x(t)) =1 S(x(t)) = 0