Squareplus activation function.
Computes the element-wise function: squareplus(x) = 0.5 * (x + sqrt(x^2 + b))
squareplus(x) = 0.5 * (x + sqrt(x^2 + b))
Squareplus activation function.
Computes the element-wise function:
squareplus(x) = 0.5 * (x + sqrt(x^2 + b))