用matlab实现的BP神经网络，比较基础，对已有的语音信号进行分类，留了500个作为检验-Using matlab to achieve the BP neural network basis of comparison, the existing classification of the speech signal, leaving a 500 as a test

matlab实现CNN卷积神经网络，进行图像分类。(We can realize neural network with matlab, which will complete the classification of the image.)

matlab的程序cnn编写，对图片进行分类并预测，最后完成搜索功能， 输入图片路径给出所有同类的图片结果(matlab program cnn train and predict search function and so on)