EM算法

https://blog.csdn.net/zhihua_oba/article/details/73776553

https://blog.csdn.net/danerer/article/details/80282612

https://blog.csdn.net/lvhao92/article/details/50802703

https://blog.csdn.net/justry24/article/details/78043307

https://www.cnblogs.com/liqizhou/archive/2012/05/11/2495388.html