screen_grab

说明：  该程序是锁相环的MATLAB的简单实现程序，从中可以看到锁相环的基本功能的实现。(This program is a simple phase locked loop of MATLAB implement programs, from which you can see the basic function of phase-locked loop of implementation.)

rayleigh，matlab的仿真，程序简单，容易实现，并易懂(rayleigh, matlab simulation, the program is simple, easy to implement and easy to understand)

fourth-order pseudospectral method for integrating the NLS equation

这个是上海傲谱分析仪器有限公司型号为FP650型火焰光度计的说明书(This is the Shanghai Ao spectrum analysis instrument Co., model for the FP650 type flame photometer.)

matlab的简单示例，matlan及小波变换应用的第一章的代码(matlab simple example, the first chapter of the matlan and wavelet transform application code)

说明：  模型阶次的辨识,各种模型参数辨识方法一般需要假定模型的结构已知，实际上在多数情况下这是不现实的。当没有模型结构的先验知识时，需要利用系统的输入输出数据来确定模型的结构。(Identification of various model parameters generally need to assume that the model structure is known, in fact, in most cases this is unrealistic. When no prior knowledge of model structure, the need to use the system input and output data to determine the model structure.)

this document a list of mathemtical forms

this is about matlab code for modeling solid

transformed sec2time in matlab

关于龙哥-库塔法的简单编写方程，此法参考数值分析中定步长的方法(About Ge- Kutta method of writing a simple equation, this method refer to the numerical analysis method of fixed step size)