从transformer 到 Bert

http://www.cnblogs.com/rucwxb/p/10277217.html

https://zhuanlan.zhihu.com/p/49271699

https://ai.googleblog.com/2017/08/transformer-novel-neural-network.html

https://www.jianshu.com/p/ef41302edeef

https://github.com/google-research/bert

https://blog.csdn.net/yujianmin1990/article/details/85221271

https://www.jianshu.com/p/923c8b489604