第七章的多维非线性辨识的MATLAB程序例7.2用神经网络学习二维非线性函数 ，是侯媛彬和汪梅的系统辨识课本上第七章的的实验。-Chapter VII of the multi-dimensional non-linear identification procedure Example 7.2 using the MATLAB neural network to learn two-dimensional nonlinear function, is Houyuan Bin and Wan