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UMAT beginning
begining of UMAT in abaqus
- 2017-09-11 20:50:56下载
- 积分:1
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GRKT10
通过C语言,实现龙格库塔法,用四阶龙格库塔法求解一阶微分方程组。(Through the C language, the realization of Runge-Kutta method with fourth-order Runge-Kutta method for solving first-order differential equations.)
- 2021-03-17 22:19:21下载
- 积分:1
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cplex
使用java语言调用cplex求解简单案例(use java language with cplex solver to solve some simple cases)
- 2018-06-19 15:48:25下载
- 积分:1
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adi
说明: matlab的adi方法求解偏微分方程,精确度较高(ADI method of MATLAB for solving partial differential equations)
- 2021-04-17 17:38:52下载
- 积分:1
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最速下降法
最优化课程中的最速下降法matlab程序,利用了wolfe搜索和armijo线搜索(Matlab program of steepest descent method in optimization course, using Wolfe search and Armijo line search)
- 2021-03-26 18:19:13下载
- 积分:1
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isaacsrc.4_2.tar
ISAAC采用多块网格技术求解二维或三维的Euler或者NS方程,并且提供了大量的湍流模型供使用,为相关研究人员提供了很好的参考。(ISAAC solves 2D or 3D Euler or NS equatioon based on a multiblock grid technique, also lots of turbulence models is included in the code. ISAAC provides a good reference for relative researches.)
- 2009-11-17 10:05:26下载
- 积分:1
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PCA算法程序 pca
PCA算法程序设计步骤:
1、去均值
2、计算协方差矩阵及其特征值和特征向量
3、计算协方差矩阵的特征值大于阈值的个数
4、降序排列特征值
5、去掉较小的特征值
6、去掉较大的特征值(一般没有这一步)
7、合并选择的特征值
8、选择相应的特征值和特征向量
9、计算白化矩阵
10、提取主分量
(PCA algorithm programming steps: 1 to mean 2, calculation of covariance matrix and its eigenvalues and eigenvectors 3, the calculation of covariance matrix eigenvalues greater than the threshold number of 4, in descending order of eigenvalue 5, remove the smaller eigenvalue 6, remove the larger eigenvalue (usually not this step) 7, the combined choice of eigenvalues 8, select the appropriate eigenvalues and eigenvectors 9, computing whitening matrix 10, principal component extraction)
- 2021-03-09 13:09:27下载
- 积分:1
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数值积分
说明: 1. 常用的数值积分方法(特别是梯形法、Simpson方法、
Cotes公式、Romberg算法以及Gauss 求积公式)的原理;
2. 复合梯形公式,复合Simpson公式,Romberg算法的程序(1. Commonly used numerical integration methods (especially trapezoid method, Simpson method
Cotes formula, Romberg algorithm and Gauss quadrature formula);
2. Program of compound trapezoid formula, compound Simpson formula and Romberg algorithm)
- 2020-07-13 11:58:53下载
- 积分:1
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chirp-Z变换 MATLAB代码.txt
说明: 一个简单的CZT chirp-Z变换例程(a simple example of CZT)
- 2019-04-26 10:39:33下载
- 积分:1
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czn_fmow
基于P-Q分解法的快速潮流计算,可用于实际系统(The fast power flow calculation based on P-Q decomposition method can be used in practical system.)
- 2018-11-19 11:14:24下载
- 积分:1