Data_analysis

信息隐藏算法中的PQ算法，其中编码部分使用的是湿纸编码，该隐藏算法性能较好。(A PQ method (m-file) for steganography)

几何活动轮廓（GAC）算法的源代码，用upwind和eno数值方法， 在MATLAB下可直接执行(geometric active contour (GAC) algorithm source code, using upwind and eno numerical methods, MATLAB under the direct execution)

本文件主要是关于分支定界算法的MATLAB程序，采用分支定界法来求取线性规划与非线性规划等问题的全局最优解。(This document is a MATLAB program on the branch and bound algorithm using the branch and bound method to strike a global optimal solution of linear programming and nonlinear programming problems.)

说明：  matlab 实现最短路径的DIJKSTRA算法，关于图论的(matlab DIJKSTRA algorithm to achieve the shortest path on graph theory)

用matlab simulink仿真单摆的两种模型以及动画显示(Pendulum with matlab simulink simulation of two models and animation)

DWT transformation is used to describe the image compression

SGA（Simple Genetic Algorithm）是一种强大的智能多变量优化算法，它模仿种群繁殖规律来进行 优化。(SGA (Simple Genetic Algorithm) is a powerful, intelligent multi-variable optimization algorithm, which imitate the laws of population reproduction is optimized.)

说明：  MATLAB下生成hilbert矩阵,直接输入一个大于零的参数,就可以生成该矩阵(MATLAB generated hilbert matrix, directly into a parameter greater than zero, we can generate the matrix)

Sparse Representation or Collaborative Representation Which Helps Face Recognition

说明：  2019年第16届华为杯数学建模F题第二问的代码(Code for the second question of mathematical modeling F of the 16th Huawei cup in 2019)