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一个通过高斯正反算公式计算高斯投影后投影平面的二维坐标，也可通过坐标反算大地经纬度。提供54系，西安80系，WGS-84系和CGCS2000系四种椭球参数。(A positive and negative Gaussian Formulas to calculate the two-dimensional coordinates of the Gauss projection projection plane can also be computed from coordinates latitude and longitude of the earth. 54 Department of the the Xi' an 80 series, WGS-84 system and CGCS2000 Department of four oval ball parameters.)

清华大学《数值分析A》－第02章.插值 Lagrange Newton Hermite 三次样条(Tsinghua University, )

进行结构响应分析的Wilson法，是直接积分的基本算法之一，相信进行有限元动力分析编程的诸位都能用上(structural response analysis of Wilson, which is direct integration one of the basic algorithm, believe that the dynamic finite element analysis program you can use)

用于求解一维气体动力学的欧拉方程代码，采用戈东诺夫格式，显式推进，可仿真非定常激波管(For solving one-dimensional Euler equations of gas dynamics code, using Godunov format, explicit advance, can simulate unsteady shock tube)

湍流模型re计算流体力学软件udf 可以用于修改UDF文件(turbulence model FLUENT)

基于Biegler动态优化正交配置法（联立算法）的matlab 代码，由M.Cizniar，M. Fikar等编写(dynopt is a set of MATLAB functions for determination of optimal control trajectory by given description of the process, the cost to be minimised, subject to equality and inequality constraints, using orthogonal collocation on fi nite elements method.)

分支界限费用矩阵的说明文档，非常实用,建议下载哦(Branch line cost matrix documentation, very practical, it is recommended to download Oh)

采用凸优化的理论解决优化问题，使用python语言，采用pip安装即可(The convex optimization theory is used to solve the optimization problem. Python language is used and pip is installed)

几个使用的解线性方程组的程序，包括高斯消去法，高斯列主元法，高斯——赛德尔消去法。简明实用。(Gauss elimaination, Gauss_seidel ellimination)

说明：  应用fluent进行两相流的仿真，内容充实具体，简易使用，是进行两相流仿真的一个很好的算例。pdf文件。(Using fluent to simulate two-phase flow, the content is rich and specific, easy to use, is a good example of two-phase flow simulation)