在Fluid中增加selu激活函数，https://arxiv.org/abs/1706.02515
Created by: guru4elephant
The activation function of SNNs are "scaled exponential linear units" (SELUs), which induce self-normalizing properties.
Created by: guru4elephant
The activation function of SNNs are "scaled exponential linear units" (SELUs), which induce self-normalizing properties.