利用matlab进行BP人工神经网络非线性拟合，对于隐藏层个数的选择进行循环操作，将模拟值与实测值进行比较，比较各个隐藏层节点个数的效果。-BP artificial neural network using MATLAB nonlinear fitting, the number of hidden layer of the choice of loop operation, the simulation values and measured values are compared, the effect of the number of nodes in each hidden layer.