LEVEL_SET

this is a homw work for students to get concept

说明：  基于matlab的图像LSB隐密程序，含丰富附件(LSB based image matlab secret process, is rich in Annex)

matlab COM组件和MFC的混合编程(matlab COM component and MFC programming mix)

对于典型的数字通信系统的仿真 包含详细的说明(for typical digital communication system simulation contains a detailed note)

DC-DC和DC-AC仿真，matlab实现(DC-DC and DC-AC simulation, matlab implementation)

Model of simple DTMF decoder with fixedpoint arithmetic

用小波变换处理并分析成人心电信号，包含matlab实现程序(ECG analysis)

采用了精确一维搜索法进行目标函数求极值，其中使用了黄金分割法，最速下降法和拟牛顿法。(Using the exact one-dimensional search method to the objective function extremum, which uses the golden section method, steepest descent and quasi-Newton method.)

主要是关于电力系统的仿真实验。内容有些残缺，但是可以当做练习题。里面有一些原理图，有模型搭建图。比较有学习价值。(Mainly on the power system simulation. Some content incomplete, but can be used as exercises. There are some schematics, there are models to build map. Compare with learning value.)

带三相故障的UPFC在双回路电力系统的应用(Application of UPFC with three phase faults in double circuit power system)