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matlab_FEM_dismesh
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)
- 2010-06-05 09:17:55下载
- 积分：1
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K_average
K均值聚类算法,matlab编写,很好用(K means clustering algorithm, matlab prepared very well with)
- 2020-11-07 20:09:49下载
- 积分：1
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autorun
一个使用控制台实现的关于设置开机自启动的小demo。(A realization about using the console to set boot the start of a small demo.)
- 2014-09-27 11:01:44下载
- 积分：1
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Orchard.Rules
补充orchard Release版本没有的Rule模块（已编译）(orchard rule modal)
- 2015-03-02 20:46:55下载
- 积分：1
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TADAKEL_2_2_2_2
CETTE docement c est l entree entre2
- 2013-05-05 07:08:57下载
- 积分：1
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pcm
本文基于MATLAB/SIMULINK动态仿真环境，以实例阐述了建立脉冲编码调制通信系统仿真模型的一般方法。根据该系统的基本原理将整个模型划分为抽样﹑量化﹑编码等几个子系统，并在传输线路上加入高斯白噪声以检验该系统的传输质量和抗干扰能力。(Title Design and Simulation for PCM communication system
Abstract
)
- 2012-04-27 08:24:53下载
- 积分：1
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srm-control-fuzzy
Control of SRM Motor using Fuzzy logic
- 2011-10-11 13:37:24下载
- 积分：1
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adaptdemos
Acoustic Echo Cancellation (AEC) This emonstration illustrates the application of adaptive filters to acoustic echo cancellation (AEC). in matlab and pdf
- 2011-10-20 05:33:47下载
- 积分：1
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GM
灰色模型在很多行业领域内得到广泛的应用，程序采用MATLAB编程，可实现GM(1,1)预测(Gray model has been widely used in many industries, the program using MATLAB programming, GM (1,1) prediction)
- 2013-05-20 14:53:03下载
- 积分：1
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TimeFrequenceMatlabCode
《Matlab时频分析及其应用》的详细代码，包括第3至15章的源码。( Matlab time-frequency analysis and its applications, the detailed code, including the first chapter 3-15 source.)
- 2008-04-22 19:51:14下载
- 积分：1
