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his little function rounds a number (or the elements of a vector ot matrix) towards the nearest number with N significant digits. Examples: roundsd(0.012345,3) returns 0.0123 roundsd(12345,2) returns 12000 This is a useful complement to Matlab s ROUND, ROUND10 and ROUNDN (Mapping toolbox), especially when dealing with data with a large variety of order of magnitudes. I was about to upload this file when I found "sd_round.m" by Edward Zechmann (see aknowledgment), which has similar feature (and more). But, because my script is very different in coding (much much shorter), I decided to share it anyway.

vc++下的坦克游戏，代码结构清晰，是游戏开发初学者不可多得的好材料-vc the tanks games, code structure and is the game developers beginners very good material

粒子群优化(Particle Swarm Optimization - PSO) 算法是一种新兴的有潜力的进化算法( Evolutionary Algorithm - EA) .PSO 算法,和遗传算法相似,它也是从随机解出发,通过迭代寻找最优解,它也是通过适应度来评价解的品质. 但是它比遗传算法规则更为简单,它没有遗传算法的“交叉”(Crossover) 和“变异”(Mutation) 操作. 它通过追随当前搜索到的最优值来寻找全局最优。-pso

幻方即1至n*n自然数排成的每行、每列、每条对角线数字之和均相等的方阵。这是一个流行的解法。 含源文件及说明-that is a magic square to n* n natural numbers line up every trip, every out, and each diagonal figures and have the same matrix. This is a popular method. Sources with papers and notes

购物系统时尚版.强大的后台文章编辑器的功能，可方便地用拖动的方式进行图文混排、图片远程上传、上传图片显示效果处理等操作.-Fashion Shopping System version. Strong background articles editor function, can be easily used way drag Mixed Map and Text, pictures, remote upload, upload pictures show the effect of processing operations.

各种PID控制算法的MATLAB源程序，可以结合相应的指导书学习-various PID control algorithm MATLAB source, combining the corresponding study guide book

网站膜版多个,PS文件PSD文档格式,并且有矢量原文件多个.-Film version of a number of websites, PS files PSD file format, and has more than the original document vector.

一个小的lindo，做数学建模的同志们应该知道吧，不知道你们用得上不。以后有好东西再给大家送来-A small lindo, make mathematical modeling comrades should know, I do not know you is not useful. After the U.S. has brought good things to give

AD7746,我做过,已经成功,欢迎下载!-AD7746, I have done has been successful, welcome to download!

vc++皮肤控件，使你的vc界面漂亮。你可以自己设计想要的皮肤。-vc++ skin controls, so that your beautiful vc interface. You may want to design their own skin.