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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)

Matlab7.x图像处理源代码，主要包括： 1 第二章到第十章源代码 2 程序详细说明(Matlab7.x image processing source code, including: Chapter 1 to Chapter 2 program source code details)

ldpc码编译码程序 仿真调试 加高斯噪声下的误码率(ldpc)

一种传统搜索优化算法 不需要对目标函数求导 得到很好的优化效果(A traditional search algorithm does not need to differentiate the objective function ,also gets well optimized results)

基于马尔科夫链的连续语音识别的源代码Matlab源码--Speechh Recognition Matlab source code -- (Based on Markov chains, continuous speech recognition source code Matlab source- Speechh Recognition of Matlab the source code-)

用于大矩阵，采用矩阵运算优先速度的dtw算法实现。 dtw:Dynamic time warping 动态时间弯曲算法(dtw:Dynamic time warping )

说明：  车间调度，适用于刚开始学习调度的朋友使用，看看啊(Shop scheduling, applied to the scheduling of friends just started learning to use, take a look at ah)

code to simulate the fiber laser mode

three phase Bridge Rectifier Circuit with different type of RLE with Simulation in matlab.

matlab神经网络算法优化实现，可自己调节各项参数(matlab neural network algorithm optimization to achieve, you can adjust the parameters of their own)