1. facenet:triplet-loss理解与train_tripletloss.py代码理解
https://blog.csdn.net/ninesky110/article/details/84877114
https://blog.csdn.net/liyuan123zhouhui/article/details/71427799
2. train_softmax.py代码注释
https://blog.csdn.net/liyuan123zhouhui/article/details/69569562