Balloontips

：滤波 fs=400 采样频率,必须大于两倍基带信号最高频率 ts=1/fs 采样时间间隔 T=5 时间窗大小 t=0:ts:T (hf1=zeros(1,N) hf1(f<=B1&f>=-B1)=1 y1=hf1.*fftshift(y) figure subplot(211) plot(f,abs(fftshift(y))/N,f,hf1, r-- ) axis([-fs/2,fs/2,0,1.2]) title( 原信号频谱 ) xlabel( f /Hz ) subplot(212) plot(f,abs(y1)/N) title( 低通滤波，截止频率90Hz ) xlabel( f /Hz ))

说明：  this is a source for regression and decision

基于遗传算法的无功优化matlab实现方法软件包，调试基本通过，可直接下载应用，具体例子可以自己修改一下原代码(Based on Genetic Algorithm for Reactive Power Optimization method matlab package, debugging basic through direct download applications, specific examples can modify the original code)

在傅立叶变换光学中夫琅和费衍射场的强度分布就等于屏函数的功率谱。因此我们可以直接将光屏进行傅立叶变换，再处理得到衍射图样。(In the Fourier transform optics, Fraunhofer diffraction field intensity distribution is equivalent to the power spectrum display function. Therefore, we can directly Guangping Fourier transform, and then to handle any diffraction pattern.)

说明：  运用VC编写的如何在VC中调用MATLAB(use in the preparation of the VC Calling MATLAB)

SNMF 算法在MATLAB平台上的实现，包括源代码，说明等(SNMF experiment on MATLAB)

Bjarne Stroustrup的课后练习 1. Stroustrup, Chapter 17, Questions 11 and 13, Page 624–625. 2. Stroustrup, Chapter 19, Question 4, Page 709.(1. Stroustrup, Chapter 17, Questions 11 and 13, Page 624–625. 2. Stroustrup, Chapter 19, Question 4, Page 709.)

matlab源代码，可能对研究LDPC码的同仁是有很大帮助的(matlab source code, may be the study of Tongren LDPC code is of great help)

我已经上传了matlab的程序源代码，请求审核

说明：  光通信计算，利用公式计算折射率分布，特别为化学方法产生的器件(optical communication, the use of the refractive index distribution formula, particularly for the chemical device)