说明：  本人编写的BP Stochastical算法，和传统的BP算法比较，Stochastical改进随机产生方向，然后导致收敛，所以能避免局部极点。 本人还加了自动产生分类的方法和适合各种函数的转换
(I prepared by BP Stochastical algorithm, and the traditional BP algorithm, Stochastical to improve the direction of a randomly generated, and then lead to convergence, they are able to avoid the partial pole. I also added a method of automatically generated classification and conversion functions for a variety of)