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基于matlab的数字图像加密，简单的分层变换(Digital image encryption matlab based, simple hierarchical transformation)

pid参数整定，代码简单实用，适合初学者使用学习(the pid parameter tuning, the code is simple and practical, suitable for beginners to learn)

To convert a Color image to a gray image

声波波动方程数值模拟。地震的一个小程序。适合初学者看看。大神就不用下了(Numerical simulation of the acoustic wave equation. Earthquake a small program. Suitable for beginners to see. God would not have got big)

介绍了简单的ldpc编码，对初学者很有用！(Introduced a simple ldpc code is useful for beginners!)

说明：  三种子波函数，sinc函数 正弦函数 Riker函数还有有限差分介质设定(Third seed wave function, sinc function, sine function has finite difference Riker media set)

该程序完成 5M回波信号的脉压/16路MTD/CFAR/聚心过程。(Completion of the program pulse echo signal 5M/16 MTD/CFAR/implosion process.)

基于GA优化的SVM算法，它可以被用于预测分类(SVM algorithm based on GA optimization for prediction classification)

这 是 一 篇关于matlab图像处理的文章(This is an article on the article image processing matlab)

针对M/PH/1(k)排队系统推导出该排队系统在任意时刻、到达时刻、退去时刻的队列长度状态概率分布、平均队列长度、以及平均等待时间，并编写程序进行数值计算，并对M/E2/1(k), M/M/1(k), M/H2/1(k)排队系统的性能进行数值比较。(against M/PH/1 (k) queuing system derived the queuing system at any time, the arrival time, faded moment of the queue length probability distribution, the average queue length, and the average waiting time, and the preparation procedures for numerical computation, and M/E2/1 (k), M/M/1 (k), M/H2/1 (k) queuing system performance numerical comparison.)