The partial gradients of the cost function with respect to the weights are a key multiplier in the updating formula. But by chain rule, they cause serious decay for updating values when several Definition of ReLTanh The activation function ReLTanh is defined as follows.ReLTanh(x)={Tanh′(...
This function is available in PHP versions 4.x, PHP 5.x as well as PHP 7.x.Example Live Demo Following example calculates tanh(pi/2) and returns 2.5091784786581 which is also the result of formula (ex + e-x))/2 − <?php $arg=M_PI_2; $res=tanh($arg); echo "tanh(pi) = ...