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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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MATLAB
文具体介绍了有关投影法进行字符分割的程序源码(Text details for the projection of the program source code character segmentation)
- 2009-05-02 17:08:28下载
- 积分：1
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node-of-optimizatin-algorithm-for-cr
协作频谱感知虽然可提高系统的感知性能， 但随着感知节点数目的增加， 系统资源的占用越来越多，
系统传输效率下降． 分析了协作频谱感知方法的感知性能， 得到协作频谱感知的感知性能与感知节点数目和接
收信噪比之间的关系， 提出了一种新的次级用户节点的选择方法， 该方法有效保证了所选择节点的感知性能，
仿真验证了该算法的有效性和可靠性．(Although the cooperative spectrum sensing can improve the perceived performance of the system, but with the perception of the number of nodes increases, more and more system resources, the system transmission efficiency decreased. Cooperative spectrum sensing method of analysis of the perceived performance of collaborative spectrum sensing by the perception of performance and perception of the number of nodes and the relationship between the received SNR, a new secondary user node selection method, which effectively guarantee perceived performance of the selected node, the simulation proves the validity and reliability.)
- 2011-06-07 15:40:02下载
- 积分：1
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detect_video
本程序是matlab语言实现。实现了运动目标的检测，并可只要在5秒内有运动的目标，就可以无限的抓取运动帧(This program is matlab language. Achieve a moving object detection, and as long as there is movement within 5 seconds of the target, you can grab unlimited movement frame)
- 2011-11-29 17:11:30下载
- 积分：1
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solitonyu
此文档是介绍孤子在饱和介质中传输的matlab仿真过程，孤子仿真网上有很多文章，可是均不带源码，恰巧本人编了些就都传上了，希望对各位有用。(Introduction This document is at saturation soliton transmission medium matlab simulation process, there is a lot of soliton simulation online article, but not with source code, I made something happen on both a mass on the hope that useful to you.)
- 2009-04-04 12:57:58下载
- 积分：1
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Reg_courant_SVM
COntrole de courant avec Modulation Vectorielle
- 2012-04-04 02:04:49下载
- 积分：1
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wimax_ofdm
基于第三代通讯wimax核心编码ofdm编码的matlab性能仿真(based on the third generation telecommunications wimax core coding ofdm coding Matlab Performance Simulation)
- 2007-05-02 16:08:44下载
- 积分：1
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ddt2
模糊控制三相异步交流电动机的建模及其仿真(Fuzzy control modeling and simulation of three-phase asynchronous AC motor)
- 2012-06-05 13:34:41下载
- 积分：1
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area1
multi area with single ntegral
- 2011-09-04 14:46:06下载
- 积分：1
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Particle-swarm-optimization
粒子群算法是一种新的模仿鸟类群体行为的智能优化算法，描述了基本粒子群算法和改进粒子群算法的原理。(Particle swarm optimization (pso) algorithm is a kind of new imitate birds swarm behavior of intelligent optimization algorithm, describes the basic principle of particle swarm optimization (pso) algorithm and improved particle swarm algorithm
.)
- 2013-12-08 14:41:49下载
- 积分：1
