MM1

gmres算法的一个特殊形式，用来求解大型稀疏矩阵方程(gmres algorithm a special form used to solve large sparse matrix equation)

说明：  这是一个基本的CDMA系统的调制与解调系统。包括随机信号的产生，调制还有相应的解调。(This is a basic CDMA coding and decoding system, it includes random signal generator and coding and decoding modules )

QR码作为一种可高速、全方位识别的二维条码,已经在各行各业中得到了应用,并具有很大发展潜力.本文针对QR码图像的识别过程中可能遇到的图像噪声干扰、QR码占实际拍摄图像的一部分、倾斜、几何失真等问题进行了研究,提出了通过改进型中值滤波去除噪声,使用QR码符号特性定位并对倾斜图像进行旋转,对失真不严重的图像采用控制点变换和双线性插值方法进行几何校正.实验证明, 本文的方法简单有效, 可以用于提高条码的正确识别率.(As a high-speed, full identification of the two-dimensional bar code, QR code has been applied in all walks of life, and also has great potential for development. In this paper, aiming at QR code image recognition process may be encountered in noise interference, QR code accounting for the actual captured image just a part, slant, geometric distortion, and other issues have been studied, put forward through improved median filter to remove noise, use QR code symbol characteristics to locate and rotate the tilted image, distortion which is not serious use control-point transform and spatial bilinear interpolation method for geometric correction. The results show that this method is simple and effective, can be used to improve the QR code correct recognition rate.)

说明：  here is the matlab code for sixty four qam modulation

modélisation gaussienne avec matlab

地球物理大地电磁测深的正演代码，包含了有限差分、有限元等(magnetotelluric 2D forward finite element program)

C-mex files for MATLAB encounter the following problem when compiling them with WATCOM 11.0: All access-functions to files (fprintf, fscanf) cannot handle double variables, only integer and strings are read or written correctly. The file convert.c contains two functions: You may read a double-variable as a string from the file and convert it to a double (function string2double) and you may convert a double to a string (function double2string) and write it to a file (see main() in convert.c). The file conditio.dat is an example of numbers read by convert.c. The conv.exe was compiled on a Windows95-system. The files were tested for MATLAB 5.2 and WATCOM 11.0a result of "ver" is: MATLAB Version 5.2.1.1420 on PCWIN (C-mex files for MATLAB encounter the following problem when compiling them with WATCOM 11.0: All access-functions to files (fprintf, fscanf) cannot handle double variables, only integer and strings are read or written correctly. The file convert.c contains two functions: You may read a double-variable as a string from the file and convert it to a double (function string2double) and you may convert a double to a string (function double2string) and write it to a file (see main () in convert.c). The file conditio.dat is an example of numbers read by convert.c. The conv.exe was compiled on a Windows95-system. The files were tested for MATLAB 5.2 and WATCOM 11.0a result of " ver" is : MATLAB Version 5.2.1.1420 on PCWIN)

在matlab下对图像进行census变换(Using this code to make census transform for image on matlab)

code about fdtd gooood

lms echo cancellation