-
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
-
henond
该程序为matlab环境下程序，主要演示法国尼斯天文台埃农教授在研究天体力学过程中提出了许多二维映射，通常说的是埃农映射H。(The program for the matlab environment procedures, the main demonstration of the Observatory in Nice, France, Egypt and a professor of agricultural research celestial mechanics in the process put forward a number of two-dimensional mapping, is usually said that the Egyptian agricultural mapping H.)
- 2008-03-26 11:23:37下载
- 积分：1
-
Gyro_dynamics_simulation_MATLAB
说明： 陀螺运动的仿真程序，动力学仿真和动画同时表示 陀螺在重力下以适当的初始速度落地的仿真结果(Gyro movement simulation program, dynamic simulation and animation at the same time that the top of the gravity of the initial velocity to the appropriate landing simulation results)
- 2009-07-28 16:12:43下载
- 积分：1
-
uca
说明： 均匀线阵的方向图和均匀圆阵的二维方向图matlab程序(direction of arrival in ula and uca)
- 2021-03-19 19:59:18下载
- 积分：1
-
lagrangematlab
拉个朗日插值公式是把Pn（X）的构造问题转化为n+1插值基函数问题的构造！此软件就是拉哥郎日插值的原程序matlab版(Rafah Colon day interpolation formula is Pn (X) issue of the structure into an n-interpolation function of the structure. This software is Barayagwiza few days interpolation procedures for the original version of Matlab)
- 2007-05-20 07:27:52下载
- 积分：1
-
Matlab
本上传资料为maatlab教程，可通过此教程学习matlab，涉及面广。(The upload information to maatlab tutorials, available through this tutorial to learn matlab, involving a wide range.)
- 2013-11-01 14:30:26下载
- 积分：1
-
MATLABCode
雷达系统建模仿真书上所有例子的源程序，十分详细，备有注释(Radar system modeling and simulation all the examples of the source book is very detailed, with notes)
- 2009-12-23 19:41:40下载
- 积分：1
-
98
说明： 对近代概率论的知识体系作了详细的介绍。包括了许多基本的知识。(Modern knowledge of probability theory were described in detail. Includes a number of basic knowledge.)
- 2010-12-21 20:25:22下载
- 积分：1
-
Motor-controller
This material is about motor control algorithms implemented with matlab source codes.
- 2014-01-27 21:08:59下载
- 积分：1
-
algo-copy-move-image-forgery
DWT-PCA (EVD) Based Copy-move Image Forgery Detection
- 2014-04-23 14:50:41下载
- 积分：1
