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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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matlab1
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- 2008-06-28 10:47:25下载
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IsInsideThePolygon
Given a point, it finds whether the point is inside or outside of the polygon, given polygon vertices.
- 2011-09-23 00:15:42下载
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- 2014-11-19 15:36:59下载
- 积分：1
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unsupervised-learing
详细介绍了机器学习中非监督学习的内容、分类和方法(This document introduces the unsupervised learing of Machine learning with details.)
- 2013-11-03 23:15:33下载
- 积分：1
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Lyapunov
说明： 计算李雅普诺夫指数，分析系统的发散性，对系统稳定性分析得到结论(The Lyapunov exponent is calculated, the divergence of the system is analyzed, and the stability of the system is analyzed)
- 2020-09-10 20:08:12下载
- 积分：1
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xingyouxian
Matlab的行优先算法，可以方便的判断对如机场、火车站、公交车的就座问题进行分析(Matlab line priority algorithm, it will be convenient for the judge, such as airports, railway stations, bus seat to undertake an analysis of)
- 2007-11-25 15:45:11下载
- 积分：1
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MR_thesis
master thesis in reflective environment
- 2011-07-24 15:59:43下载
- 积分：1
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linearfilter
空域数字图像线性滤波器和频域非递归滤波器（包括：频域变换法、频域抽样法和窗函数法）的Matlab实现。(Airspace linear digital image filters and frequency-domain non-recursive filter (including: frequency-domain transformation method, frequency-domain sampling method and window function method) of the Matlab implementation.)
- 2009-12-17 11:23:16下载
- 积分：1
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dtw
说明： DTW算法是孤立词语音识别中最简单有效的算法，是基于DP动态规划的思想。(DTW)
- 2010-03-19 10:59:25下载
- 积分：1
