On-the-n-wavelet-matlab-program

DistMesh giving a singular FEM matrix?(Hi Anyone here with some experience of using DistMesh in finite element code? I m solving the scalar Helmoltz equation in an annular region in 2D: rho_1 < rho < rho_2 where rho_1 is the radius of a Perfect Electric Conducting cylinder and rho_2 is where the mesh is truncated using an Absorbing Boundary condition. Now, I ve written code to mesh the region myself (by dividing the region into annular rings and picking a fixed number of points on each ring) and I ve written another program which uses DistMesh to mesh the region. I get a nice solution using my own meshing code but the FEM matrix becomes singular when I use DistMesh. This is the DistMesh Code I used: Circle with hole rABC=1.5 rCyl=0.5 fdstring=sprintf( ddiff(dcircle(p,0,0, f),dcircle(p,0,0, f)) ,rABC,rCyl) fd=inline(fdstring, p ) box=[-2,-2 2,2] [p,N]=distmesh2d(fd,@huniform,0.04,box,[]) I tried changing box and the 0.04 value (initial edge length). But every time, the matrix becomes sin)

通过用三角形网格来对经典悬臂梁问题进行静力学分析，得到位移场，应力和应变场，同时与精确值相比较。(Triangular grid by using the classical beam problems to static analysis, the displacement field, stress and strain fields, and compared with exact values.)

无线通信系统中,信道间的相关性随着天线数目的增加而减小,当趋于无穷时,可视为正交.此为这一观点的仿真程序.(In wireless communication system, the correlation between channel and decreased as the number of antennas, when becomes infinite, can be treated as orthogonal. This a simulation program for this view.)

南大赵其昌老师的文章，对于分析薄板振动的初学者有很好的指导作用(Nanda ZHAO Qi-chang teacher' s article, for the analysis of the vibration plate has a very good guide for beginners)

the attached all programs are based on error control coding for ex. LBC, Convolition, RS code etc. all programs are generalized means for any size input or any type of circuit respectively. the all programs are tested on matlab 2012

根据mallat算法编写的三层小波分解程序,没有使用matlab小波工具箱的函数，便于大家理解小波快速算法的实现原理(Mallat algorithm based on wavelet decomposition of the preparation of the three procedures, do not use the function matlab wavelet toolbox for us to understand the realization of fast algorithm for wavelet principle)

瑞利衰落仿真瑞利衰落仿真瑞利衰落仿真瑞利衰落仿真(Rayleigh fading Rayleigh fading simulation simulation Simulation of Rayleigh fading Rayleigh fading simulation)

LDPC code simulacation

基于扰动的极值搜索控制，很好的例子，目前本网站还没相关内容(Extremum seeking control based on disturbance, a good example, the Web site is not related content)

基于MATLAB GUI数字滤波器的设计 （1）要有人机交互界面。 （2）可实现IIR低通、IIR带通、FIR低通、FIR带通类型的数字滤波器。 （3）设计的滤波器可以显示幅频响应曲线等图形，便于对此滤波器进行性能分析。(MATLAB digital filter)