支持向量机不错的讲解
http://blog.csdn.net/v_july_v/article/details/7624837 (很好)
http://www.cnblogs.com/jerrylead/archive/2011/03/13/1982639.html
http://www.cnblogs.com/jerrylead/archive/2011/03/13/1982684.html
为什么引入拉格朗日算子可以求出极值
http://blog.csdn.net/WSXLK168/article/details/46119219
