HS

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)

可以求解雷洛方程的膜厚和载荷方程，读者可以稍微修改相关参数就可以应用到自己的公式和相关数学模型中(Reynolds model to develop the film-thickness and hydrodynamic load. )

采用遗传算法对风力机叶片气动外形进行优化设计，快速有效(Genetic algorithm to optimize the design of wind turbine blades aerodynamic shape, quickly and efficiently.)

ABAQUSYONG UMAT 描述热力耦合子程序(ABAQUSYONG UMAT subroutine describe thermal coupling)

有限元法计算平板受集中载荷的程序，二维四边形网格(finite element method concentrated load plate by the procedure, two-dimensional rectangular grid)

说明：  扩展有限元的Fortran代码，用于扩展有限元的数值仿真计算。(Extended finite element of the Fortran code for the extended finite element numerical simulation.)

本书介绍了XFEm在结构件的断裂分析中的应用(this book introduces the application of XFEM in the field of fracture analysis)

求解无约束优化问题 wolfe线性搜索代码(Wolfe line search for unconstrained optimization)

说明：  lu分解矩阵求逆... =========== 紫薯紫薯...(Matrix LU decomposition inversion)

一篇论文，对研究转子动力学初学者有参考价值，题目为叶片振动影响下双盘转子-轴承系统的稳定性与分岔。(Paper, the study of rotor dynamics beginners reference value, titled double-disc rotor blade vibration under the influence- bearing system stability and bifurcation.)