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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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D2Q9
晶格波尔兹曼方法，D2Q9的Matlab程序.(Lattice Boltzmann method, D2Q9 procedures)
- 2009-03-13 16:41:38下载
- 积分：1
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EedffazipD
EDFA的掺铒光纤长度模拟计算，附3篇相关论文，330mw的980nm泵泵浦，3db的泵浦吸收，12m最佳长度已经的到验证，可作为EDFA设计参考
(EDFA erbium-doped fiber length simulation of three related papers, 330mw of 980nm pump pump pump 3db absorption 12m optimum length has been to verify, can be used as the EDFA design reference)
- 2012-08-05 18:09:17下载
- 积分：1
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MAIN
Vortex flow around a square cylinder function method of numerical simulation
- 2012-11-28 10:55:39下载
- 积分：1
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7-DOF-RIDE-MODEL-test1
汽车七自由度动力学模型的动力学分析和计算。并对其进行计算(The car seven degrees of freedom dynamic model
)
- 2021-03-16 20:29:21下载
- 积分：1
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SPHForPoiseuilleFlow
SPH计算泊肃叶流动,利用周期边界条件和虚拟粒子固壁条件(SPH Code for poiseuille Flow by peoriodic boundary condtion)
- 2020-10-26 20:19:59下载
- 积分：1
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igafem-nguyen
等几何分析MATLAB程序包,有着丰富的例子,其中fem包内为传统的拉格朗日插值有限元,
iga包内为nurbs插值的等几何有限元(This is the README file for the Isogeometric Analysis (IGA) Matlab code.
The code supports one, two and three dimensional linear elasticity problems.
Extended IGA for hole, inclusion and crack modelling is also implemented.)
- 2020-10-04 15:17:40下载
- 积分：1
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1616
把十六进制数转换为十进制数，简单方便！能用于串口通信数据处理中(The hexadecimal number is converted to a decimal number, is simple and convenient! Can be used for serial communication data processing)
- 2008-03-09 14:37:30下载
- 积分：1
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diagnosis
计算几个复杂的天气诊断指数，最大对流稳定度指数，下沉对流有效位能，风暴强度指数等(The complexity of calculating the number of diagnosis index of the weather, the largest index of convective stability, subsidence CAPE, storm intensity index)
- 2009-04-28 18:45:00下载
- 积分：1
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fluent-UDF
说明： 常用的fluent边界条件的控制UDF，包括动网格UDF(Commonly used control UDF of fluent boundary conditions, including moving grid UDF)
- 2020-12-16 19:21:13下载
- 积分：1
