brainpy.math.surrogate module

sigmoid	Spike function with the sigmoid-shaped surrogate gradient.
piecewise_quadratic	Judge spiking state with a piecewise quadratic function [1]_ [2]_ [3]_ [4]_ [5]_.
piecewise_exp	Judge spiking state with a piecewise exponential function [1]_.
soft_sign	Judge spiking state with a soft sign function.
arctan	Judge spiking state with an arctan function.
nonzero_sign_log	Judge spiking state with a nonzero sign log function.
erf	Judge spiking state with an erf function [1]_ [2]_ [3]_.
piecewise_leaky_relu	Judge spiking state with a piecewise leaky relu function [1]_ [2]_ [3]_ [4]_ [5]_ [6]_ [7]_ [8]_.
squarewave_fourier_series	Judge spiking state with a squarewave fourier series.
s2nn	Judge spiking state with the S2NN surrogate spiking function [1]_.
q_pseudo_spike	Judge spiking state with the q-PseudoSpike surrogate function [1]_.
leaky_relu	Judge spiking state with the Leaky ReLU function.
log_tailed_relu	Judge spiking state with the Log-tailed ReLU function [1]_.
relu_grad	Spike function with the ReLU gradient function [1]_.
gaussian_grad	Spike function with the Gaussian gradient function [1]_.
inv_square_grad	Spike function with the inverse-square surrogate gradient.
multi_gaussian_grad	Spike function with the multi-Gaussian gradient function [1]_.
slayer_grad	Spike function with the slayer surrogate gradient function.
inv_square_grad2
relu_grad2