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Table 13 Supported activation functions

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Name

Form

Hyperbolic tangent

\(f(x) = \tanh x\)

Rectified linear unit

\(f(x) = \max \{ 0, x \}\)

Sigmoid

\(f(x) = \frac{1}{1 + e^{-1}}\)

Softmax

\(f(x_{i}) = \frac{e^{x_{i}}}{\sum _{j}e^{x_{j}}}\)