中文说明：训练高斯混合模型的程序，尽管此类代码较多，但本程序经过笔者改写优化后，很大程度上避免了普通方法中局部最优的问题。
English Description：
Although there are a lot of codes for training Gaussian mixture model, this program has been rewritten and optimized by the author, which largely avoids the problem of local optimum in the ordinary method.