variable

书籍C++ Primer第五版的相关源码，若打不开后缀为.cc的文件，请将后缀改为.c或.cpp(source code of C++ Primer fifth edition , if you can t open the file suffix .cc, please change the suffix to .c or .cpp)

沿直线最小化优化学习率的梯度下降法matlab版本的一个实例源代码，带轨迹收敛图。(a source code of steepest descent with learning rate to minimize along the line by matlab)

控制系统的matlab程序六个。含有波特图，根轨迹图等等matlab函数的使用方法(Matlab process control system 6. Porter contain maps, root locus diagram and so on to use the matlab function)

图像置乱加密。 主要思想：从两幅图像中选取信息，然后置乱成一幅图像。(Image scrambling encryption. The main idea: to select information from two images, and then scrambling into an image.)

椭圆拟合程序，最小二乘法拟合椭圆的算法，matlab实现。可直接运行。(ellipsedraw for ellipse fit which used in image)

this is frequency hopping mfsk in matlab

非线性求解的二分法程序，还有非线性方程简单迭代。含误差分析，最大迭代次数。(The dichotomy procedure for nonlinear solutions and the simple iteration of nonlinear equations. The error analysis, the maximum number of iterations.)

说明：  三维电磁场FDTD程序（3D-FDTD matlab）PEC边界(（3D-FDTD matlab）PEC)

抖动量化隐写术(PQ),供信息隐藏研究者研究(PQ )

transformed sec2time in matlab