suanfa

实现了chirp信号的分数阶傅立叶变换，表现出了其能量聚集效果，另外对单频、多频、高斯信号进行了分数阶傅立叶变换(The chirp signal Fractional Fourier Transform, showing the effect of its energy gathered addition of single-frequency, multi-frequency Gaussian signal Fractional Fourier Transform)

一个用matlab编写的时钟程序，包含了数字钟和传统显示的圆形中，背景是可爱图片。运行时和电脑同步。(a program on a clock which contains a traditional clock and a numerical one，with a lovely background picture。when the program runs ，the clock will keep the pace with the correct time of the computer。)

rotate any digital image to 3 different degrees with gui in matlab.

sepic converter module simulink/matlab

这是我们参加2011年全国大学生数学建模大赛，做A题的论文和matlab程序，当年获得国奖。 利用此程序可以进行污染源位置反演计算，以及其他类似服从高斯扩散模型的源项反演。 计算量小，简单易懂。(Detect of Pollution source in city.2011 China Undergraduate Mathematical Contest in modeling Q_A.)

W1光子晶体 平面波展开法 慢光波导 空气柱 线缺陷(W1 photonic crystal waveguide plane wave expansion method slow air column line defect)

说明：  实现协作频谱感知，采用压缩感知方法，并对不同虚警率下的正确判决概率进行对比仿真。(To achieve cooperative spectrum sensing, compressed sensing method is adopted, and the correct decision probability under different false alarm rates is compared and simulated.)

做EOF分解的程序！非常实用，简单 ，有需要 的 同学可以 下载！！(EOF program，very simple and useful)

稀疏分数阶傅里叶变换例子，线性调频信号的例子，分数阶傅里叶变换检测(Sparse fractional Fourier transform examples, linear frequency modulation signal example, fractional Fourier transform detection)

加入白噪声的音频水印程序，采用3级小波分解，将随机序列嵌入到低频系数中(Adding white noise of the audio watermarking procedure for the three wavelet decomposition, the random sequence is embedded into the low frequency coefficient)