fftanalysis

fft spectrum audio file

说明：  用MATLAB求解遗传算法的旅行商问题，这一类问题在大学生以及研究生的数模竞赛以及日常生活当中尤为重要的，为我们所重视。、近年来，学术界对旅行商问题也逐渐重视起来。(Using MATLAB genetic algorithm for solving the traveling salesman problem, this kind of problem students and graduate students in Mathematical Modeling Contest, and daily life is particularly important for our attention. In recent years, the academic community on the traveling salesman problem is gradually pay attention to it.)

用matlab对通信信号进行调制simulink仿真,它包括am,pm,fm,ask,psk,fsk,qpsk等调制方式(matlab simulink simulation ，contain：am,pm,fm,ask,psk,fsk,qpsk)

QC-LDPC码生成矩阵编程，围长为12，无4环(The program searches for a girth 12 QC-LDPC code given size of sub-matrix, row and column weights. The configuration of sub-matrices could also be changed. The program offers flexibility in constructing girth-12 QC-LDPC codes compared to other algorithms. The program builds a Tanner graph by connecting groups of rows and columns. A connection is made if it does not form less than twelve-cycles. The program may fail to find a code given particular parameters. It also does not find the smallest codes compared to other algorithms. )

cofdm simulation graphs(1) 摘自９４年名家论文(cofdm simulation graphs (1) from the famous 94 theses)

algorithm to calculate the MMSE algorithm inlab mat

一般情况下，我们都是在MATLAB命令行或DOS命令行下编译MEX程序。 所用的命令就是：mex filename.c 这有很多不方便的地方： a. 虽然mex也可以编译C++的mex程序，但是它的主框架仍是C的 a. 当程序有多个模块时，需要多次使用mex命令，操作很麻烦 b. 不能利用VC特有的ClassWizard自动创建和维护类 c. 不能用MFC类库编写应用程序 d. 不能方便地进行类似VC的项目管理 本文详细解说如何在IDE中编译MEX程序(Under normal circumstances, we are all in the MATLAB command line or DOS command line program to compile MEX. Command is used by: mex filename.c This has a lot of inconvenient places: a. Although the mex can also compile C++ The mex program, but it is still the main frame C of a. When the procedure has a number of modules the need to repeatedly use the mex command, the operation is cumbersome b. Can not use VC-specific ClassWizard automatically create and maintain the category c. can not use MFC class library to write applications easily d. should not conduct a similar project management VC a detailed explanation of how this article IDE compiling MEX procedures)

采用高诗法来计算积分，此算法提高了精度。(we computer intergration by the gauss method ,which improve the precision compared with others.)

spiht image compression

隐马尔科夫树模型，这是一个自包含的程序包，包括2维离散小波变换和逆小波变换 例程。在每个子带中每个刻度的所有小波系数都绑在一起，避免了模型的过度拟合。(This is a self-contained package including the 2-D DWT and inverse DWT routines. All wavelet coefficients at each scale within each subband are tied together to avoid overfitting of the model. )