PLS的交叉有效分析

很好的最小二乘求解工具，经典算法的c语言版本实现(A MINPACK-1 Least Squares Fitting Library in C)

若矩阵A中的某一元素A[i，j]是第i行中的最小值，而又是第j列中的最大值，则称A[i，j]为矩阵A中的一个鞍点。请写出一个可确定此鞍点位置的算法（如果这个鞍点存在）。(If the matrix A, an element A [i, j] is the minimum value in the i-th row, but is the maximum value of the j-th column, then A [i, j] for the matrix A is a saddle point. Please write a algorithm to determine the position of saddle point (saddle point exists).)

用matlab所编用传输矩阵法计算光子晶体的能带结构的程序(prepared by using Matlab using the transfer matrix method photonic crystals with the structure of procedures)

三次B样条最小二乘拟合，附文献，Approximation of data using cubic B′ ezier curve least square fi tting，Author: M Khan(Cubic B-spline least squares fitting and literature. Approximation of data using cubic B ezier curve least square fitting, Author: M Khan,)

电磁波走时层析成像图像重建正演反演程序设计(Electromagnetic wave travel tomography image reconstruction inversion inversion program design)

求解雷诺方程有有限元法、有限差分法、有限体积法，本程序就是采用有限体积法对雷诺方程进行求解。(Solving Reynolds equation has finite element method, finite difference method, finite volume method, the program is the use of finite volume method to solve the Reynolds equation.)

数值分析实验1.明确插值多项式和分段插值多项式各自的优缺点； 编程实现拉格朗日插值算法，分析实验结果体会高次插值产生的龙格现象；(Experiments of numerical analysis 1. Define the advantages and disadvantages of interpolation polynomials and piecewise interpolation polynomials. The Lagrange interpolation algorithm is programmed, and the Runge phenomenon produced by high-order interpolation is analyzed.)

数学最优问题中，拉格朗日乘数法（以数学家约瑟夫·路易斯·拉格朗日命名）是一种寻找变量受一个或多个条件所限制的多元函数的极值的方法。(In the mathematical optimization problem, the Lagrange multiplier method (named by the mathematician Joseph Luis Lagrange) is a method of finding the extremum of a multivariate function which is restricted by one or more conditions.)

说明：  数学建模 马尔科夫链的详细讲解 马尔科夫链的详细讲解 数学建模(A detailed explanation of markov chains for mathematical modeling)

单元刚度矩阵，用于计算三单元刚度矩阵，输出刚度矩阵(Element stiffness matrix is ​ ​ used to calculate the three-element stiffness matrix, the output stiffness matrix)