神经网络的B_P算法源码，主要用于训练，获得权值-Neural network algorithm B_P source, mainly for training, access to the right value

神经网络中的bp算法源码，主要是为了更好理解算法的意义和实现原理-Bp neural network algorithm source code, the main algorithm in order to better understand the meaning and implementation principle of

backpropagation algorithm