getECRFeature

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)

主成分分析matlab程序，里面包含子程序，运用时直接调用主程序即可，可用于无监督模式学习(Principal component analysis matlab program, which contains a subroutine, the main program can be called directly when applying, can be used for unsupervised learning mode)

用MATLAB程序演示灰度调整，对比度增强，直方图均衡，局部平滑，中值滤波，频率域平滑与锐化，用MATLAB编写有关程序(failed to translate)

AWGN信道设计与仿真熟悉加性高斯白噪声(AWGN)信道，学习Matlab相关编程知识及AWGN信道的设计与仿真实现。(AWGN channel)

《MATLAB 7.X程序设计》-王建卫-源代码及习题答案，用以初学者(" MATLAB 7.X programming" - Wang Wei- the source code and problem sets for beginners)

求解语音信号的RASTA-PLP和PLP特征(Solving speech signal characteristics of RASTA-PLP and the PLP)

说明：  matlab 功能工具 matlab 功能工具(matlab functions matlab function tool tool)

中英文翻译,对此专业的学生的外文翻译很有必要。(In English translation, foreign language students in this professional translation is necessary.)

针对机械优化设计的matlab优化M文件集,非常有用(For optimization of mechanical optimization design matlab M-file set, very useful)

函数实现对InSAR复相位信号的基于局部频率估计的“斜坡自适应滤波” 此滤波方法特别适用于InSAR相位图滤波，能在滤除噪声的同时最大限度地保留有用信息(This matlab function is for InSAR phase filtering,usually called "slope adapt filter".It is based on local frequency estimation.)