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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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mnote-carlo
Matlab code for cell range calc using montecarlo
- 2009-05-31 19:00:44下载
- 积分：1
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ele
说明： 自动化测试工具，便于自动化测试的实现，忘下载(automation testing)
- 2011-04-06 11:27:13下载
- 积分：1
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ConeBeam_BackProjection_main
file for demonstrating tomography reconstruction according to cone beam geometry and also useful for
Generate set of projections around 360 degrees with a fan beam geometry.
- 2012-05-17 09:42:14下载
- 积分：1
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rsoft
rsoft教程，有关分支波导的仿真，希望对大家有用。(rsoft tutorial about branch waveguide simulation, and hope to be useful.)
- 2013-04-03 11:03:56下载
- 积分：1
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2013102242160953
人脑图像边缘提取,比较好用的人脑图像边缘提取matlab仿真程序。(The human brain image edge extraction, relatively easy to use the human brain image edge extraction matlab simulation program.)
- 2013-11-24 23:12:15下载
- 积分：1
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Chapter8
现代通信系统matlab第八章信道容量和编码源代码(Modern communications systems matlab Chapter VIII channel capacity and coding source code)
- 2014-01-11 16:18:41下载
- 积分：1
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MMSE_detection_2x2
评估2X2MIMO系统线性MMSE检测的硬判决和软判决性能，仿真了瑞利衰落信道。(Linear MMSE detection system to assess 2X2MIMO hard decision and soft-decision performance, simulated Rayleigh fading channels.)
- 2014-04-18 09:42:43下载
- 积分：1
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DTC
说明： 一个关于电机直接转矩控制的MATLAB仿真，欢迎提出修改意见QQ：404340669(A direct torque control of MATLAB simulation, welcomed the proposed amendments QQ: 404340669)
- 2010-04-15 13:52:41下载
- 积分：1
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Concha_CF
【转】协同过滤代码，用于推荐系统，包括基于项目和基于用户两种情况。实现基于用户和基于项目的协同过滤算法。 实验所用数据为MovieLens – a web-based movies recommender system with 43,000 users & over 3500 movies. 保存在ga.mat文件用，由于ga.test测试集过于庞大，全部用来计算的话耗时庞大，所以每次计算时随机选择部分，具体函数的使用请参照probar.m。我所得到的实验结果保存在results1-results8.mat里面。([Turn] collaborative filtering code for the recommended system, including project-based and user-based two cases. User-based and project-based collaborative filtering algorithm. Experimental data for MovieLens- a web-based movies recommender system with 43,000 users & over 3500 movies. Saved in ga.mat file with Because ga.test test set is too large, all used to calculate the time-consuming massive, so every time The calculated random selection portion, the use of the specific function, please refer to probar.m. I obtained experimental results are saved inside results1-results8.mat.)
- 2012-10-15 14:24:42下载
- 积分：1
