利用matlab2012a，制作两个excel表格，一个是建模集train，另一个是验证集test，然后就可以构建出人工神经网络模型bp，之后再用验证集做外部验证。(Using MATLAB 2012a, two excel tables are made, one is the modeling set train, the other is the validation set test, then the artificial neural network model BP can be