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.

Filename	Size	Update
Ca_bp.m	704	2018-12-25
Ca_test.xls	1066180	2018-12-25
Ca_train.xls	3153358	2018-12-25

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