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Nnnrrfxxfce
牛顿法计算方程,能计算非线性方程/方程程组,有需要的能试试,主要是数学方法的实现
(Newton method to calculate the equation to calculate the nonlinear equation/equation of equations, needs to try, mainly the implementation of the mathematical methods)
- 2012-08-20 07:22:55下载
- 积分:1
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QR-decomposition
QR分解法是目前求一般矩阵全部特征值的最有效并广泛应用的方法,一般矩阵先经过正交相似变化成为Hessenberg矩阵,然后再应用QR方法求特征值和特征向量。它是将矩阵分解成一个正规正交矩阵Q与上三角形矩阵R,所以称为QR分解法,(QR decomposition
)
- 2020-08-31 01:08:10下载
- 积分:1
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20036127002
反密法在数值计算中的地位就不用我来一一列举了,此程序就可以轻易的使其实现。(anti-secret numerical calculation method in the position I would not have to list them one by one, this procedure can easily achieve it.)
- 2006-11-24 18:26:46下载
- 积分:1
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Gearerroranalysisprogam
用vc++编写的具有计算齿轮误差的软件,并能判断是否合格(Prepared using vc++ error with computing gear software, and to determine eligibility)
- 2020-09-09 10:48:02下载
- 积分:1
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PRequation
工程领域,PR方程代码.用于计算混合工质性质。(PR equation code)
- 2020-09-04 16:58:09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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CG_DESCENT-C-2.0.tar
共轭梯度法求解凸二次规划,代码由C语言开发,老外编写的程序,很值得一读。(Conjugate gradient method for solving convex quadratic programming, code generated by C language development, foreigners prepared program, it is worth reading.)
- 2020-06-28 20:00:01下载
- 积分:1
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emd
c语言程序编写在经验模态分解,包含三次样条(c language programming in the empirical mode decomposition, contains the cubic spline)
- 2021-02-03 01:10:00下载
- 积分:1
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co2
fluent中关于co2的真实气体模型的自定义程序(fluent in about co2 real gas model custom program)
- 2020-12-13 21:59:15下载
- 积分:1
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KrigingContour
说明: 克里金、反距离插值算法_栅格图等值线填充等(Kriging, inverse distance interpolation algorithm _ isogram filled grid map, etc.)
- 2008-11-19 10:41:37下载
- 积分:1