-
particleFilter_resampling
说明: 粒子滤波重采样算法对比与分析,matlab实现。(Particle filter resampling algorithm comparison and analysis, matlab achieve.)
- 2008-09-18 09:15:41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
-
Monta-carlo
计算机模拟和蒙特卡洛方法,文件格式为pdg,主要介绍随机模拟方法(Computer Simulation and the Monte Carlo method, file format pdg, stochastic simulation method introduced)
- 2011-04-28 10:27:56下载
- 积分:1
-
Calculator
PB开发的计算器程序,适合初学者,比较简单,开发程序版本PB9.0(PB calculator program developed for beginners, is relatively simple, the development program version PB9.0)
- 2012-12-26 17:55:50下载
- 积分:1
-
lxcad-stress-umat12
利用abaqus二次开发平台,利用for语言编写的混凝土弹性本构(Use abaqus secondary development platform, the use of language for concrete elastic constitutive)
- 2020-11-23 20:09:34下载
- 积分:1
-
mie
该函数程序用于计算大气米散射中吸收、散射、衰减、后向散射。(Computation of Mie Efficiencies extinction (qext), scattering (qsca), absorption (qabs), backscattering (qb), asymmetry parameter (asy=<costeta>) and (qratio=qb/qsca).)
- 2013-06-09 10:57:31下载
- 积分:1
-
PM
说明: 彭曼公式主要是计算蒸散发量,在水文和气象中有广泛的应用(Penman formula to calculate evapotranspiration primarily, widely used in hydrology and meteorology)
- 2014-10-27 17:38:05下载
- 积分:1
-
FractalDim
盒维数计算和豪斯多夫维数的计算与应用研究程序(box counting)
- 2013-07-27 17:50:31下载
- 积分:1
-
matrix-computation
本书由美国数学大师大师编写的数学计算这本书,很经典。国内的书编写残次不齐(This book is authored by American mathematician Mathematical calculation ,It is a good book)
- 2020-10-30 19:59:56下载
- 积分:1
-
P-value
calcule de la p-value en c#
- 2011-11-10 03:17:06下载
- 积分:1