WordVector：
http://www.cnblogs.com/pinard/p/7243513.html
http://www.hankcs.com/nlp/word-vector-representations-word2vec.html
https://blog.csdn.net/u014595019/article/details/51884529
LSTM：
https://blog.csdn.net/u014665013/article/details/79867848
https://blog.csdn.net/jerr__y/article/details/58598296
https://blog.csdn.net/xierhacker/article/details/73384760
EM：
https://www.jianshu.com/p/90c2a318eccb
https://www.zhihu.com/question/40797593
LDA:
https://blog.csdn.net/v_july_v/article/details/41209515
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