https://www.cnblogs.com/pinard/p/6029432.html 似然函数的本质 http://blog.youkuaiyun.com/lwq1026/article/details/70161857http://blog.youkuaiyun.com/wjlucc/article/details/70893603http://blog.youkuaiyun.com/star_liux/article/details/39666737 转载于:https://blog.51cto.com/hadoooo/2065579