link: http://www.bdpt.net/cn/2019/01/22/%E6%B7%B1%E5%BA%A6%E5%AD%A6%E4%B9%A0%EF%BC%9A%E5%89%8D%E6%B2%BF%E6%8A%80%E6%9C%AF-%E4%BB%8Eattentiontransformerelmogpt%E5%88%B0bert/
欢迎转载，作者：Ling，注明出处：前沿技术-从Attention,Transformer,ELMO,GPT到BERT
