-
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
-
chafen
SPN的差分密码分析,建议选取的明密文对数量为8000+,太小可能结果有偏差(SPN Differential cryptanalysis, ciphertext clear recommendations for selected number of 8000+, too small deviations may result)
- 2015-11-02 21:56:38下载
- 积分:1
-
simgear_2.4.0.orig.tar
SimGear是飞行模拟项目FlightGear的引擎,是一套开源库。(SimGear is FlightGear flight simulator project engine, is a set of open source libraries.)
- 2014-11-15 05:18:32下载
- 积分:1
-
粒子群优化算法(PSO)应用于神经网络优化程序
粒子群算法优化BP神经网络,使用matlab平台实现,解决了BP神经网络速度较慢的问题(Particle swarm optimization (PSO) optimization of BP neural network)
- 2020-07-04 10:40:02下载
- 积分:1
-
LMS
说明: 辨识参数,进行迭代计算,可以辨识各种经典模型的是参数,经典最小二乘法a(Parameter identification, iterative calculation, can identify all kinds of classical models is the parameter, classical least square method a)
- 2019-12-30 20:52:00下载
- 积分:1
-
code-2
This is a code for AODV Routing. It works with matlab. Enjoy it.
- 2013-04-23 07:12:17下载
- 积分:1
-
DBSCAN
DBSCAN Designed by Dr. Michal aszykowski Department of Chemometrics Institute of Chemistry, The University of Silesia. It s the basic one.
- 2005-06-29 07:15:08下载
- 积分:1
-
ide86
ide86.rar单位脉冲,单位阶跃,正弦函数等连续信号的MATLAB表达式。.. (ide86.rar pulse units, unit step, Sine function as a continuous signal MATLAB expression. ..)
- 2006-05-23 13:38:48下载
- 积分:1
-
2011-4-1
基于matlab开发环境,编写了边缘检测的图形识别小程序。用于圆形标点。要求标点为白底黑圆。适合初学者理解图形识别的原理。(Based on the matlab platform,we compile the short program to realize the detection of edge detection algorithm 。For the laymen,it maybe useful。)
- 2011-06-01 19:49:03下载
- 积分:1
-
2.Using-SA-as-an-Optimization-for-IMRT
Using SA as an Optimization for IMRT.doc
- 2013-05-17 01:08:27下载
- 积分:1