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chebfun-svd
求解O-S方程特征值,可以适用于多种条件下的O-S方程特征值计算(To solving OS Equation characteristic value, can be applied to a variety of conditions OS equation eigenvalue calculation)
- 2013-03-12 00:27:14下载
- 积分:1
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codes
在图论中的floyed算法程序,可以算两点之间的最小距离(The floyed algorithm in graph theory)
- 2012-09-01 00:31:21下载
- 积分:1
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vgg_quat_from_rotation_matrix
从旋转矩阵到四元数的转换,matlab代码。(From the rotation matrix to quaternion conversion, matlab code.)
- 2008-12-12 00:33:56下载
- 积分:1
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nscat-3.tar
用以计算nscat地球物理模型函数的程序!(This is a program for calculating the nscat geophysical model.)
- 2020-11-07 17:19:49下载
- 积分:1
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04
说明: 龙格-库塔方法的使用,例子
求y’=y-2x/y,y(0)=0。
解:输入X0=0,X1=1,H=0.2,N=6。()
- 2007-09-08 08:47:57下载
- 积分:1
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基于结构网格二维Euler方程的Jameson求解方法
说明: 基于结构网格二维Euler方程的Jameson求解方法
自己写的程序,网格是现成的结构网格(Jameson solution method based on two-dimensional Euler equation of structural grid.
Write their own procedures, the grid is ready - made structural grid.)
- 2019-04-09 10:00:54下载
- 积分:1
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新编Marc有限元实例教程
编程教程,帮助入门学者学习建模,从初级开始,逐步深化,非常有帮助(Programming tutorials, help beginners learn modeling, from the beginning, gradually deepen, very helpful)
- 2019-01-14 19:19:06下载
- 积分:1
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Euler_DG_Quadrilateral_2D
自己写了一个二维Euler方程的间断有限元程序
上次发了一个三角形单元的程序 因为不是曲边单元 所以在圆柱后面容易形成涡
现在把程序改为曲边四边形单元了 没有涡出现
单元是8节点四边形单元 节点编号顺序是 1 5 2 6 3 7 4 8 也就是四个角点依次
是1 2 3 4 然后是边的中点编号 5 6 7 8.
时间推进采用 Runge-Kutta 方法
数值通量采用全局Lax-Friedrichs通量
仍然不能捕捉激波 因为没有做重构或者加人工粘性 等这个做出来了 再发一次。
程序没有进行优化 比如说内存的消耗没有优化 比如直边单元的边界积分仍然采
用了曲边的积分方法 增加了计算量 比如面积分、线积分都是采用的是Gauss-
Legendre-Lobatto积分 积分精度会比一般的Gauss-Legendre积分精度低一阶 等
等问题。 二维的 纯属交流性质 就没有考虑这些问题 ^_^
如果物面全部是直边 那么只要改变一个参数N 就可以获得不同的计算精度 且具
有谱精度 因为单元的节点是Gauss-Legendre-Lobatto积分点。 其实就是谱元法
(物面是曲边的情况我不清楚是不是也可以通过提高基函数的阶数 也就是增加N
来提高计算精度)(Wrote a two-dimensional Euler equations with discontinuous finite element program
Last made a triangular element of the program, not curved edge unit is so easy to form a vortex in the cylinder behind the
Program to curved edge quadrilateral element vortices appear
Unit is the order of 8-node quadrilateral element node number is 15,263,748 which is the four corners of the points in turn
Is 1234 and then the side of the midpoint of the number 5678.
Time promote the use of Runge-Kutta method
Numerical flux of the overall situation of Lax-Friedrichs, flux
Still can not capture the shock wave did not do the reconstruction or artificial viscosity do it Zaifayici.
The program is not optimized for example, memory consumption is not optimized such as straight-edge boundary integral of the unit is still mining
Integral method to increase the amount of computation such as surface integral with a curved edge, the line integral using the Gauss-
The Legendr)
- 2021-01-29 12:58:40下载
- 积分:1
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NearToFar
该程序用fortran90编写,时域有限差分(FDTD)中的近远场变换方法。解决了电磁波后向散射中的RCS计算(FORTRAN90 prepared with the program, finite difference time domain (FDTD) in the near field to far field transformation method. Resolved backscattering of electromagnetic waves in the RCS calculation)
- 2008-06-07 19:21:59下载
- 积分:1
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search
这是一个数组练习,程序的作用是查询一个一维数组(数值型数组)中每一个元素出现的次数,且元素出现的顺序不能改变(This is an array of exercises, the program' s role is to query a one-dimensional array (numeric array) in the number of occurrences of each element, and the element can not be changed in order of appearance)
- 2013-07-26 09:37:09下载
- 积分:1