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c_and_f

于 2007-05-31 发布 文件大小:5KB
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  c/C++跟fortran语言之间的一些转换(c/C fortran language with the conversion between)

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  • srfft
    FFT DIF 分裂基的C语言代码,比较好的说明了整个流程(FFT DIF split the base of the C language code, better explains the entire process)
    2010-06-02 17:10:36下载
    积分:1
  • 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
  • tochnog-Masin
    TOCHNOG PROFESSIONAL,有限元开源源程序。c++语言(TOCHNOG PROFESSIONAL, finite element open source. c++ language)
    2021-04-03 09:59:06下载
    积分:1
  • static_jiecheng
    几种计算阶乘、阶乘之和的算法,由于计算机存储问题,一般阶乘不可能算得太大,只是一种方法。(Several computing factorial, factorial, and the algorithm, due to computer storage problems, the general factorial can not be considered too great, is only a way.)
    2008-04-23 12:18:40下载
    积分:1
  • 7
    说明:  相变UDF,包括质量传递和热量传递,能够进行气液相变的模拟(Phase transition UDF, including mass transfer and heat transfer, gas-liquid phase transition can be simulated)
    2013-09-23 15:06:01下载
    积分:1
  • UKF
    无迹卡尔曼滤波算法的c语言。网上找到的,貌似是老外编的,蛮不错的。(unscented kalman filter code of visual c.)
    2021-01-05 15:08:54下载
    积分:1
  • OOPFEM
    面向对象的有限元程序设计 ——空间8结点等参元的分析计算(Object-oriented finite element program design- space 8 node isoparametric element analysis calculation)
    2009-03-02 18:47:05下载
    积分:1
  • LZYGSXY
    数值分析课程必备的算法:列主元高斯消去法算法。有需要的同学下载(Numerical analysis courses required algorithms: PCA out Gaussian elimination algorithm. Those students in need to download)
    2009-01-05 22:38:00下载
    积分:1
  • df
    说明:  经过个人修改的matlab科学计算程序,供初学者使用(MATLAB scientific computing and visualization simulation literature amended program can achieve numerical conversion between)
    2012-08-06 19:12:57下载
    积分:1
  • jx
    说明:  矩形件排样的模拟退火算法求解 适用于矩形件的排样(Rectangular pieces of nesting of simulated annealing algorithm for nesting of rectangular parts)
    2008-08-20 18:15:39下载
    积分:1
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