说明：  BP神经网络的数据分类，该案例是使用BP神经网络来进行语音特征信号的分类；基于BP神经网络的语音特征信号分类算法建模包括BP神经网络构建、BP神经网络训练和BP神经网络分类三步，该程序包含上述过程的实现。
(BP neural network data classification, this case uses BP neural network to classify speech feature signals; BP neural network based speech feature signal classification algorithm modeling includes BP neural network construction, BP neural network training and BP neural network classification Step, the program contains the implementation of the above process.)