人工神经网络(ANN)，简称神经网络，是一种模仿生物神经网络的结构和功能的数学模型或计算模型。神经网络由大量的人工神经元联结进行计算。大多数情况下人工神经网络能在外界信息的基础上改变内部结构，是一种自适应系统。现代神经网络是一种非线性统计性数据建模工具，常用来对输入和输出间复杂的关系进行建模，或用来探索数据的模式。(Artificial neural network (ANN), referred to as neural network, is a mathematical model of the structure and function of biological neural network. Neural networks are connected by a large number of artificial neural networks. In most cases, artificial neural networks can change the internal structure based on the external information, and it is an adaptive system. Modern neural network is a kind of nonlinear statistical data modeling tool, which is used to model the complex relationship between input and output.)