chan

有限元求解柏松方程。本文采用FORTRAN语言编制程序。程序中大部分变量采用有名公共区存储方式存储，这样可以减少内存占用量。 IFG：生成有限元网格信息，即元素节点局部编码与总体编码对照表，节点实际坐标，边界节点编码与边界点上的已知值 GKD：生成总刚一维存储对角元的地址，计算总刚一维存储长度 FIXP：设置已知节点函数值 GK(NI,NJ,ADJ,AIJ)：单元刚度矩阵计算 GF(NI,N,M,LE,YI,FE)：单元列阵的计算 AK(I,J,AIJ)：总刚度矩阵元素迭加 QEB：总刚度矩阵和总列阵合成 BDE：边界条件处理 SOLGS：Gauss-Seidel迭代法求解方程组 UDIFF(NI,NFLAG,UDIF,LE,ADJ)：标准元素内形状函数导数计算 DIFF：节点上 ， 加权平均 (In this program, FEM was used to solve the possion equation. It is implemented through FORTRAN)

fft变换后求出主频，FFT transform to calculate frequency

一个简单的傅立叶带亮度描绘子提取图像的形状特征程序(A simple Fourier descriptor with the brightness of the image shape feature extraction procedures)

采用分段逐步计算，结合快速傅立叶变化，计算群速色散和自相位调制在光纤中对所传输的飞秒脉冲的影响。(Using split-step computation, combined with Fast Fourier Transform Algorithm, calculated the influence to transmission of the femtosecond pulse about the group velocity dispersion and the phase modulation in the fiber.)

A finite element fortran code for 2-D truss

matlab in ga solving travel saleman problem.

说明：  有限元分析视频学习，可用于有限元分析视频学习(Finite element analysis video learning, used for finite element analysis video learning)

地统计学中的克里格插值法，Matlab编写，内有详细的说明。(failed to translate)

this document contains an explanation of mathematical functions

to judge points in a polygon