文件为一个关于BP神经网络的资料，虽然资料看上去比较早，但我感觉挺不错，对于初学BP神经网络的人来说直观易懂，内容也讲的比较清晰。-File as a data on the BP neural network, although the data appear relatively early, but I feel pretty good, BP neural network for the beginner who is intuitive and the content is about the comparison clear.