You use the SQL aggregate functions to determine various statistical data sets....

这个程序可以计算给定点处的小区信号范围覆盖。-is program computes a map of visibility from a selected point on a topography. It has been written to help the search for radio relay best location. Because it considers only direct line of sight, it gives a good estimation for possible radio link for short distances only (less than 10 km), neglecting curvature of the Earth, Fresnel zone and atmospheric refraction on radio waves propagation. The program computes the relative elevation angle of the mask for each point (the angle is null or negative if the point is visible). The function needs a digital elevation model Z and associated (X,Y) vectors or matrices of coordinates (same unit as Z), position of the point (X0,Y0), the antenna height H0 (for instance 4 m), and the hypothetic antenna height Ha on each topography points (for instance 3 m). When no output argument is given, the function plots a map of the results (color map of mask angles, and blank for visible points, see example screenshot). The s

Dct of 4*4 matrix of an image

源码实现了一个较简单的3d台球游戏，源码精简易懂，易于学习。-Source to achieve a more simple 3d billiards games, streamlined source to understand, easy to learn.

留言版整站文件包。数据库管理。前台后台登录。-message boards entire station package. Database management. Prospects Sign background.

无线传感器网络数据采集，以及数据融合的论文。-Wireless sensor network data acquisition, and data integration thesis.

南京邮电大学数学实验作业答案...有一定的参考价值...通过mathlab实现-Experimental Mathematics, Nanjing University of Posts and Telecommunications operating the answer ... have a certain reference value mathlab realize through the ...

一个非常好的工程图库软件，做界面的时候，能用到。-A very good engineering library software, an interface, when be required.

本程序是一个质问识别系统，可以用来识别不同人的指纹，用于公安系统。-this procedure is a question recognition system can be used to identify different people"s fingerprints and for the public security system.

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几个用c语言写的网络协议实践的程序，包括arp，ip改变，ip路游等--Several network protocol programs which are writed in c language, and includes arp, ip changes, ip rootway etc.