In the early stages of deep learning, the sigmoid activation function is used. It is also simple to determine the smoothing function. As the name implies, sigmoidal curves have an "S" shape along the Y axis. The sigmoidal tanh function (x) applies logistic functions to "S"-form functions. The key difference is that tanh(x) does not have a value in the range [0, 1]. Sigmoid curves are often...
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