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用matlab实现的DCT水印处理，并附有图像显示。(Matlab implementation of the DCT with watermark treatment, together with image display.)

It is a matlab sourcecodes for the calculation of refrective index of AlGaAs alloy. I think it is useful for the guys who need the accurate value of the refrective index. It can be expanded to the other semiconductor alloy if you have the related parameters.

command vectoriel of induction motor

these are the codes for vblast and blast architecture

C均值算法的实现，这是我正在学习的C均值算法的实习代码，分享给大家，不当之处，欢迎指正(C-means algorithm, which I am learning C-means algorithm internship code for everyone to share, inappropriate, please correct me)

Rosenbrock函数优化属于无约束函数优化问题，其全局极小值位于一条平滑而狭长的抛物线形状的山谷底部，且为优化算法提供的信息很少，因此找到其全局极小值就显得很困难。根据Rosenbrock函数的这种特性，专门提出了一种改进的PSO算法，该算法引入三角函数因子，利用三角函数具有的周期振荡性，使每个粒子获得较强的振荡性，扩大每个粒子的搜索空间，引导粒子向全局极小值附近靠近，避免算法过早地收敛，陷入局部最优，从而找到Rosenbrock函数的全局极小值。大量实验结果表明，该算法具有很好的优化性能，为某些领域某些特定的类似于Rosenbrock函数的优化问题提供了一种新的思路。(Rosenbrock function optimization functions are unconstrained optimization problems, its global minimum value at a smooth parabolic shape and narrow mountain valley Department, and for the optimization algorithm provides little information, and therefore find its global minimum value becomes very difficult. According to this feature Rosenbrock function, specifically mentioning Out an improved PSO algorithm (PSO-R), the algorithm introduced trigonometric factor, using trigonometric has periodic oscillations, so that each particle to obtain more Strong oscillations of expanding the search space of each particle, the particle is close to nearby guide global minimum, avoiding premature convergence algorithm, into a local optimum, thus Finding the global minimum Rosenbrock function. Experimental results show that the algorithm has a good optimizing performance, similar to some certain areas Rosenbrock function in the optimization problem provides a new way of thinking.)

This function is intended as the "main" program. That is, execution will begin with this function it will receive commandline input from the user and return results to the user.

基于PSO方法的PID参数整定，代码实用，适合初学者使用(PID parameter tuning based on PSO method, the code is practical, suitable for beginners to use)

说明：  该程序包含低通、高通滤波功能的轮次平稳性检验法(The program includes low pass, high pass filter function in a smooth round test method)

fft 16 point matlab code