说明：  关于简单遗传算法和简单bp网络的程序,其中的矩阵相乘速度很快，而且比较容易扩展，即任意多的输入，任意多的隐含层
(on simple genetic algorithms and simple bp network procedures, which the matrix multiply very fast, but relatively easy to expand, or arbitrary number of input and any number of hidden layer)