说明：  神经网络是单个并行处理元素的集合，我们从生物学神经系统得到启发。在自然界，网 络功能主要由神经节决定，我们可以通过改变连接点的权重来训练神经网络完成特定的功能
(A single neural network is a collection of parallel processing elements, we have been inspired by biological nervous system. In nature, the network function of a decision by the ganglion, we can by changing the weight of the connection point to train neural network to complete the function of specific)