/caffe

sigmoid fix (cpp) #3411

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2 src/caffe/layers/sigmoid_layer.cpp
@@ -7,7 +7,7 @@ namespace caffe {
template <typename Dtype>
inline Dtype sigmoid(Dtype x) {
- return 1. / (1. + exp(-x));
+ return 0.5 * tanh(0.5 * x) + 0.5;
}
template <typename Dtype>