n
f(x)=1 if ≥ Θ; 0 if < Θ } Σ((Pj(x-1)/dj)+ijxwj)
j=1
Where:
n = the number of synapses
dj = the decay rate of the neurotransmitter in the jth synapse
ijx = activation state of the jth synapse at time interval x
wj = weight of the jth synapse
Θ = The threshold value
Pjx = Pj
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