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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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ANSYS)
本文章中介绍了行业软件ansys的基础知识，基本操作以及一些高级的应用，对于刚接触ansys的人是很好的入门材料(This article describes the basics of the industry software ansys, the basic operation and some advanced applications, for people new to ansys is a good introductory material)
- 2011-01-18 10:09:20下载
- 积分：1
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convbi
convolution of a signal
- 2012-03-28 08:11:14下载
- 积分：1
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testFilter
系统传输函数测试，使用扫频法测试已知系统的频响特性并绘制相关的频响图(System transfer function test, frequency sweep method is used to test the frequency response characteristics of the known system, and to draw the relevant frequency response diagram)
- 2017-09-07 16:57:09下载
- 积分：1
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Face_test_luminance
这是一个关于人脸识别的MATLAB程序。。。。。。。(face detection)
- 2009-05-07 14:30:34下载
- 积分：1
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HarrisCornerDetector
这是Harris角点算法的一个非常好的参考代码，使用的是Matlab语言，实现了非最大抑制功能。(The code calculates the Harris Feature Points. )
- 2009-12-01 14:24:15下载
- 积分：1
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PCM_Testing
说明： PCM（脉冲编码调制）在MATLAB中仿真调试的程序(PCM (pulse code modulation) in MATLAB simulation testing procedures)
- 2006-03-13 15:32:46下载
- 积分：1
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nueralNetwork
It is demonstrated that neural networks can be used effectively for the identification and control of nonlinear dynamical systems. The emphasis is on models for both identification and control. Static and dynamic backpropagation methods for the adjustment of parameters are discussed. In the models that are introduced, multilayer and recurrent networks are interconnected in novel configurations, and hence there is a real need to study them in a unified fashion. Simulation results reveal that the identification and adaptive control schemes suggested are practically feasible. Basic concepts and definitions are introduced throughout, and theoretical questions that have to be addressed are also described
- 2013-08-07 18:58:45下载
- 积分：1
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knot
用于创建三叶结的matlab源代码。对于了解三叶结基本知识很有用。(used to create the clover Guitar Matlab source code. Clover Guitar for understanding the basic knowledge useful.)
- 2006-12-04 20:57:55下载
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HSDCTcode
心音信号的DCT域变换压缩编码，LLoyld最佳量化与霍夫曼编码，利用心电R波进行分帧，在不到1 左右失真度的情况下达到了6.0以上的压缩比(Heart sound signals on DCT transform coding, LLoyld optimal quantization and Huffman coding, the use of ECG R wave sub-frame, less than about 1 in the case of distortion to achieve a compression ratio of more than 6.0)
- 2013-07-27 10:20:40下载
- 积分：1
