nlj寻优算法，对于系统参数辨识有很好的效果！-nlj optimization algorithm for system parameter identification have a good effect!

二阶数学模型的NLJ辨识MATLAB实现，仿真结果验证了NLJ在系统辨识中的可操作性.-Identification of second-order mathematical model of the NLJ MATLAB implementation, simulation results show the NLJ in the System Identification operability