GA1

matlab基础中课后习题，一个非常简单的MATLAB小程序，用二分法求根(matlab based after-school exercise in a very simple little program MATLAB, with the dichotomy Roots)

说明：  一个图像旋转30度的matlab源代码，实现lena图像的旋转，可直接运行，思路清晰(Rotate an image 30 degrees, matlab code, to achieve lena image rotation, can be directly run, clear)

disizhangchegnxu程序集合是北京航空航天大学编写的(disizhangchegnxu collection procedure is to write the Beijing University of Aeronautics and Astronautics)

说明：  这个是一个介绍OFDM原理的资料，对于初学者来说很好用(This is an introduction to the principle of OFDM data is useful for beginners)

大津法计算图像阈值，先也可以处理遥感影像tif格式的，首先将遥感影像的灰度值导出为txt格式(ostu method to calculate the threshold image, you can deal with remote sensing image tif format)

全国研究生数学建模大赛，PM2.5问题。采用灰色理论GM(1，1)模型实现地区PM2.5的预测，内含真实数据文件。(The Graduate School of mathematical modeling contest, PM2.5 problem. By using the grey theory GM (1, 1) model to realize the prediction of area PM2.5, with real data file.)

Novel methos to calculate the fitness

说明：  该段程序是AM调制，其中包括调制信号，载波和已调信号的时频分析(The section of program is AM modulation, including modulation, carrier and modulated signals time-frequency analysis)

经典MATLAB算法，插值计算，拟合，绘图等(Classic MATLAB algorithms, interpolation, fitting, drawings, etc.)

Program that implements echo watermarking. The basic idea is to embed a watermark by adding an echo to the original sample.