用C++写的矩阵和矢量运算库

正整数x 的约数是能整除x 的正整数。正整数x 的约数个数记为div(x)。例如，1，2，5，10 都是正整数10 的约数，且div(10)=4。设a 和b 是2 个正整数，a≤b，找出a 和b之间约数个数最多的数x。 对于给定的2 个正整数a≤b，编程计算a 和b 之间约数个数最多的数。 数据输入 输入数据由文件名为input.txt的文本文件提供。文件的第1 行有2 个正整数a和b。 结果输出 程序运行结束时，若找到的a 和b 之间约数个数最多的数是x，将div(x)输出到文件output.txt中。 输入文件示例 输出文件示例 input.txt output.txt 1 36 9 -Positive integer x can be about a few of the positive integer x divisible. Positive integer x the approximate number recorded as the number of div (x). For example, 1,2,5,10 are about 10 positive integer number, and div (10) = 4. Set a and b are two positive integers, a ≤ b, to find a and b between about a few number of the largest number of x. For a given two positive integers a ≤ b, Programming calculated a and b between about a few number of the largest number. Data entry input data from the document text file named input.txt provide. File line 1 has two positive integers a and b. The results run the end of the output, if found between a and b of about a few number o

二维屏幕上表现三维点的绘制方法――适合图形编程的数字运算方法原理-2D screen performance 3D Rendering point-- suitable for graphical programming method of calculation principle

基于aforge.net的视频监控智能分析，目标跟踪、物体分类，用C#编写，是个很好的例子。

pdnMesh is an automatic mesh generator and solver for Finite Element problems. It will also do post-processing to generate contour plots and Postscript printouts. GUI support using GTK or MFC (Win32) is available. The problem definition can be done in any form and given to pdnMesh as an input data file. Drawing Exchange Format (DXF) files can be directly imported to pdnmesh. The quality and the coarseness of the mesh can be controlled by giving input parameters.

Matlab 的Numerical Computing，全书pdf＋全代码，英文版-Matlab Numerical Computing, the whole book pdf+ code, in English

Calculating roots of polynomial

单纯型法，主要用于规划-simplex method, used mainly for planning

选票程序-ballot procedures

统计一个txt文件中字符的个数和单词的个数 可以指定文本文件中搜索指定字符-a txt document the number of characters and words can specify the number of text files to search for the designated characters