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 constructed, and then the validation set is used for external validation.)