naca4gen

潮流计算中的拉丁采样算法的源程序，可运用其进行概率潮流计算(Latin sampling flow calculation algorithm source, may, in its calculation of the probability trend)

该程序实现的是计算器功能，包含简单的加减乘除，以及取余、求倒等功能计算。(The program is a calculator function, contain simple addition and subtraction, multiplication and division, and modulo, seeking poured functions calculation.)

详细全面的蒙特卡洛PPT讲解以及MATLAB算例，帮助大家0基础快速掌握MC的精华所在。(Detailed and comprehensive Monte Carlo PPT to explain and MATLAB example, to help you basically grasp the essence of MC.)

三角模糊数随机模拟程序，基于模糊数与随机模拟理论，进行评价分析(Triangular fuzzy random simulation program...)

包括脚本文件和函数文件形式，用蒙特卡洛模拟的方法计算美式期权的价格以及基本描述,采用的是脉冲对消法。( Including script files and function files in the form, Monte Carlo simulation method of calculating the American option price and basic description, It uses a pulse of consumer law.)

波面的zernike多项式拟合，在光学测试领域应用相当广泛(Wave surface zernike polynomial fitting, in the field of application of a wide range of optical test)

自己写了一个二维Euler方程的间断有限元程序 上次发了一个三角形单元的程序 因为不是曲边单元 所以在圆柱后面容易形成涡 现在把程序改为曲边四边形单元了 没有涡出现 单元是8节点四边形单元 节点编号顺序是 1 5 2 6 3 7 4 8 也就是四个角点依次 是1 2 3 4 然后是边的中点编号 5 6 7 8. 时间推进采用 Runge-Kutta 方法 数值通量采用全局Lax-Friedrichs通量 仍然不能捕捉激波 因为没有做重构或者加人工粘性 等这个做出来了 再发一次。 程序没有进行优化 比如说内存的消耗没有优化 比如直边单元的边界积分仍然采 用了曲边的积分方法 增加了计算量 比如面积分、线积分都是采用的是Gauss- Legendre-Lobatto积分 积分精度会比一般的Gauss-Legendre积分精度低一阶 等 等问题。 二维的 纯属交流性质 就没有考虑这些问题 ^_^ 如果物面全部是直边 那么只要改变一个参数N 就可以获得不同的计算精度 且具 有谱精度 因为单元的节点是Gauss-Legendre-Lobatto积分点。 其实就是谱元法 （物面是曲边的情况我不清楚是不是也可以通过提高基函数的阶数 也就是增加N 来提高计算精度）(Wrote a two-dimensional Euler equations with discontinuous finite element program Last made ​ ​ a triangular element of the program, not curved edge unit is so easy to form a vortex in the cylinder behind the Program to curved edge quadrilateral element vortices appear Unit is the order of 8-node quadrilateral element node number is 15,263,748 which is the four corners of the points in turn Is 1234 and then the side of the midpoint of the number 5678. Time promote the use of Runge-Kutta method Numerical flux of the overall situation of Lax-Friedrichs, flux Still can not capture the shock wave did not do the reconstruction or artificial viscosity do it Zaifayici. The program is not optimized for example, memory consumption is not optimized such as straight-edge boundary integral of the unit is still mining Integral method to increase the amount of computation such as surface integral with a curved edge, the line integral using the Gauss- The Legendr)

三角形网格划分, 自由网格和结构网格划分，包括主要的matlab文件和函数，使用main.m 执行(mesh triangle grid using matlab, free mesh and structured mesh. The file include mfiles and functions. The program could be run through main.m)

是学习PCA特征提取的很好的学习资料，能量熵的计算，对于初学matlab的同学会有帮助。( Is a good learning materials to learn PCA feature extraction, Energy entropy calculation, Matlab for beginner students will help.)

矩阵的广义逆计算，共两种方法，其中迭代法有一阶收敛和二阶收敛(generalized inverse matrix calculation, a total of the two methods, which iteration is a second-order convergence and convergence)