【Caffe】Focal Loss

Pk對zk的求導，以及Pk對zj的求導請參考https://blog.csdn.net/u013066730/article/details/86231215 前向代碼： for (int i = 0; i < outer_num_; ++i) { for (int j = 0; j < inner_num_; j++) { const int label_value = st

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