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Prove that the first order derivative of a unipolar continuous activation function f' (net) = 0 (1-0)

Mumbai University > Computer Engineering > Sem 7 > Soft Computing

Marks: 5 Marks

Year: Dec 2015

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Delta Training rules for unipolar continuous activation function:

$$f'(net)=\dfrac{exp(-net)}{[1+exp (-net)]^2}$$

This can be rewritten as

$$f' (net)=\dfrac{1}{1+exp(-net)}.\dfrac{1+exp(-net)-1}{1+exp (-net)}$$

Or

$$f' (net)=0(1-0)$$

Hence, for unipolar continuous activation function f1 (net) = 0 (1-0).

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