McCulloch-Pitts "unit" Output is a "squashed"linear function of the inputs: ai-g(in)=g(②jW.a) Bias Weight a0=-1 Wo.i ai=g(inj) 形a In, a Input Input Output Links Activation Output Function Function Links A gross oversimplification of real neurons,but its purpose is to develop understanding of what networks of simple units can do Chapter 20,Section 5 4 McCulloch–Pitts “unit” Output is a “squashed” linear function of the inputs: ai ← g(ini) = g ΣjWj,iaj Output Σ Input Links Activation Function Input Function Output Links a0 = −1 ai = g(ini) ai g W ini j,i W0,i Bias Weight aj A gross oversimplification of real neurons, but its purpose is to develop understanding of what networks of simple units can do Chapter 20, Section 5 4