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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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Basickalmanhecheng
该程序是设计了一种基于卡尔曼函数的DMC控制，能有效的消除控制系统的稳态误差，得到理想的控制效果(The program is designed based on Kalman DMC control function, can effectively eliminate steady state error control system, are ideal control)
- 2010-09-15 10:21:13下载
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zhiliyouxi
智力游戏_十全十美_解法matlab源代码！需要的下！(intellectual game _ _ perfect solution Matlab source code! The next need!)
- 2007-05-07 19:54:58下载
- 积分：1
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average_mutual_information_main
平均互信息函数，计算两个时间序列的互信息量，修改(The average mutual information function to calculate the mutual information of two time series, modified)
- 2010-11-25 22:53:54下载
- 积分：1
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LZC
计算一维向量的LZC，已经设置为头文件，可以直接运用(One-dimensional vector of LZC, has been set for the header files, can be applied directly)
- 2011-01-07 10:48:40下载
- 积分：1
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bpsk
说明： BPSK仿真 仿真了在瑞利信道和加性高斯白噪声 下的调制和解调及误码率(The simulationof bpsk, input the signal in Rayleigh and awgn)
- 2011-03-23 21:15:53下载
- 积分：1
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inmin01
用积分最小值准则来求P,PI,PID的个参数，其中Gc是校正器的传递函数,kp为比例系数， Ti为积分时间常数，Td为微分时间常数，输入参量vars为带迟滞--惯性环节模型的[K T τ]，已知参数k=vars（1）；T=vars（2）；ι=vars（3）,iC=vars(4) (Minimum criteria of integral seeking P, PI, PID' s parameters, which Gc is the corrector transfer function, kp is proportional coefficient, Ti for the integral time constant, Td for the differential time constant, input parameters vars as with hysteresis- inertia model of [KT τ], known parameters k = vars (1) T = vars (2) ι = vars (3), iC = vars (4) )
- 2010-05-18 20:35:38下载
- 积分：1
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solving-of-linear-equations
采用MATLAB语言编译的线性方程组求解函数，希望对大家有用(resolving overdetermined linear equations)
- 2015-01-15 17:41:08下载
- 积分：1
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ASLtbx
是生物医学工程专业脑功能后处理软件，用于脑出血，脑梗死血流变化的相关研究领域。(Biomedical engineering is the brain function processing software for cerebral hemorrhage, cerebral blood flow changes in the relevant field of study.)
- 2014-01-18 22:55:54下载
- 积分：1
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ekranaBas
This script prints contents of a mat. type data file to the Matlab command window
- 2010-02-24 06:36:41下载
- 积分：1
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