fortran

序列二次规划(SQP)方法被认为是解决非线性约束优化最有效的方法之一，传统的SQP算法每一步迭代都要求解QP子问题。 　　(Sequential two times programming (SQP) is considered to be one of the most effective ways to solve nonlinear constrained optimization. The traditional SQP algorithm requires QP iteration for every iteration.)

多物理场耦合软件采用有限元方法模拟表面等离子体激元，适合入门学习者(Multi-physics coupling software using the finite element method to simulate the surface plasmon, suitable for entry-learners)

comsol仿真的学习教程，有助于初学者深度掌握comsol的 基本使用(Comsol simulation course is helpful for beginners to master the basic usage of COMSOL)

★问题描述: 给出平面上的N 个二维点，求出距离最小的2 个点对。本题中距离定义为他们的直 线距离。例如(0,0) (3,4)的距离为5. ★数据输入： 有多组数据，对于每组数据，第一行是一个数字N 表示点的个数。N=0 的时候说明 输入结束。之后N 行，每行有2 个浮点数x_i,y_i 表示第i 个点的坐标。(1<=N<=10000 0,0<=|x_i|,|y_i|<=10^9) ★结果输出: 输出一个浮点数，表示最近点对的距离除以2，保留2 位小数(四舍五入)。

多孔介质污染物迁移动力学地下水一维渗流的数学模型 差分求解(Contaminant migration in porous media groundwater dynamics differential one-dimensional mathematical model for solving seepage)

对轨道不平顺采用耿贝尔分布进行拟合优度检验(On track irregularity using Gumbel distribution goodness of fit test)

sph溃坝模拟，非常经典的sph计算，采用matlab编写(sph dam break simulation, very classic sph calculated, hahahahahahahahahah)

crackprop_modeI_lefm_xfem_cpe4，ABAQUS基于线弹性断裂力学的扩展有限元法实例。(crackprop_modeI_lefm_xfem_cpe4 ABAQUS based on linear elastic fracture mechanics extended finite element method instance.)

分别采用Roe格式和AUSM格式求解一维黎曼问题，并将计算结果与解析解进行比较，发现这两种计算格式都能获得高的计算精度。(Roe scheme were used in this procedure and AUSM format to solve a 1-D RIEMANN problem, and numerical results were compared with the analytical solution, the results can be seen from these two formats have a solution with high accuracy.)

最小二乘法拟合曲线C++代码，任意的M个数据，任意的次数N(N不易太高)。输出拟合曲线的表达式(Least Squre For ...)