（EM算法）The EM Algorithm 的入門與深入

（EM算法）The EM Algorithm 的入門

http://www.cnblogs.com/jerrylead/archive/2011/04/06/2006936.html

https://blog.csdn.net/zouxy09/article/details/8537620

EM算法的九層境界：Hinton和Jordan了解的EM算法

http://baijiahao.baidu.com/s?id=1586809503418533687&wfr=spider&for=pc