solve_the_paticial_derivertive_equations_using_MAT

最小二乘法的Matlab参数辨识程序，每一步的解释都非常易懂清晰，是一个很好的matlab例子(Matlab least squares method parameter identification procedures, the explanation of each step are very easy to understand clearly, is a good example of matlab)

To see an spectrogram of a signal non perodical

基于标准支持向量机对传感器的线性系统用MATLAB软件进行仿真建模程序(Based on the standard support vector machine (SVM) of the linear system of sensor with the MATLAB software simulation modeling procedures )

在matlab上的Asift程序，在原有基础上有所改进，程序可以出色地实现图像的识别，匹配，效果相比SIFT，SURF等有大幅提高(In matlab Asift program improvements based on the original, the program can achieve excellent image recognition, matching, compared to the effect of SIFT, SURF, etc. have greatly improved)

运动方程中的速度向量和加速度向量用位移的某种组合来表示，将微分方程组的求解问题转化为代数方程组的求解问题，并在时间区间内求得每个微小时间区间的递推公式，进而求得整个时程的反应。 中心差分法是一种显示的积分法，它基于用有限差分代替位移对时间的求导（即速度和加速度）。(Velocity vectors and acceleration vectors in motion equations are expressed by a combination of displacements. The problem of solving differential equations is transformed into the problem of solving algebraic equations. The recurrence formulas of each small time interval are obtained in the time interval, and then the response of the whole time interval is obtained. The central difference method is a display integration method, which is based on the finite difference method instead of the displacement derivative of time (i.e. velocity and acceleration).)

说明：  根据最大相关性，最小冗余性的原则来优化特征空间结构(According to the principle of maximum correlation and minimum redundancy, the feature space structure is optimized)

simulin simulation code for sin wave generator and monitoring

说明：  计算时滞微分方程的李雅普诺夫指数，动力学维数(Delay differential equations Lyapunov index calculation, dynamic dimension)

一个简单的MATLEB图像处理软件，可以用来实现图像的打开，灰度变换，添加噪声，几何操作，绘制直方图等。(A simple MATLEB image processing software can be used to achieve the image open, gray-scale transformation, adding noise, geometric operations, draw histogram and so on.)

电动机变频调速PWM SIMULINK仿真(Motor Variable Speed PWM SIMULINK simulation)