参考文献：
1、https://juejin.im/post/5bbf41c3f265da0af16160d2
2、https://www.jianshu.com/p/e14c6a722381
3、https://www.jianshu.com/p/c6b4c7810ee6
4、https://www.jianshu.com/p/3a97c0a43beb
5、https://github.com/Choco31415/Attention_Network_With_Keras
6、https://github.com/foamliu/Self-Attention-Keras
7、https://github.com/philipperemy/keras-attention-mechanism
https://blog.csdn.net/shenxiaolu1984/article/details/51493673
李宏毅
https://www.bilibili.com/video/av26543556/?p=2
1、generation
2、attention
得到与输入点的概率值，相乘再相加
https://blog.csdn.net/shenxiaolu1984/article/details/51493673
Show, Attend and Tell: Neural Image Caption Generation with Visual Attention