stance_dff

converts a binary undirected adjacency graph into a hypergraph. The output is a non symmetric matrix where the columns are the vertices and the rows are the hyper edges.

计算电磁学基础教材， 包括MOM FEM FDTD(fundmental materail for beginner include MOM FEM FDtd)

能够非线性函数的曲线拟合，包括一个Matlab的m文件和存有实验数据的txt文件。(Nonlinear function to the curve fitting, including a Matlab m-files and there are experimental data txt file.)

罚函数法 它将有约束最优化问题转化为求解无约束最优化问题: 其中M为足够大的正数, 起"惩罚"作用, 称之为罚因子, F(x, M )称为罚函数.(hunhefahanshufa)

说明：  多维随机数的生成方法，一维随机数生成方法，高维随机数的生成方法(Generation methods of multidimensional random number, one-dimensional random number and high-dimensional random number)

Galileo单频定位程序，能基于rinex文件实现高精度定位，供编写时参考(Galileo single-frequency positioning program can achieve high-precision positioning based on RINEX file for reference when writing.)

共轭梯度法（Conjugate Gradient）是介于最速下降法与牛顿法之间的一个方法，它仅需利用一阶导数信息，但克服了最速下降法收敛慢的缺点，又避免了牛顿法需要存储和计算Hesse矩阵并求逆的缺点，共轭梯度法不仅是解决大型线性方程组最有用的方法之一，也是解大型非线性最优化最有效的算法之一(Conjugate gradient method (Conjugate Gradient) is between the steepest descent method and Newton' s method between a method that takes only a first derivative information, but to overcome the slow convergence of the steepest descent method shortcomings, but also avoid the need to store Newton and computing the inverse Hesse matrix and disadvantages, conjugate gradient method is not only to solve large linear equations of the most useful methods, large-scale nonlinear optimization solution is the most efficient algorithms)

fortran编写的读取dxf程序，可读取圆，多线段，直线，点，块参照，文字的坐标高程信息(write by fortran ，it can read dxf program， can read a round, multi line, linear, point, block reference, the coordinates of elevation information text)

有关FFT的应用仿真,包括：FFT处理仿真、FFT加窗、FFT分辨率、频谱泄露 (Simulation on the application of FFT )

内有图像协方差的计算，协方差间黎曼距离的计算等等(Within the calculation of the image covariance, the covariance between Riemannian distance calculation, and so on)