open nurbs library for curve part

某石油公司计划建造一条由东向西的主输油管道。该管道要穿过一个有n 口油井的油田。从每口油井都要有一条输油管道沿最短路经(或南或北)与主管道相连。如果给定n 口油井的位置,即它们的x 坐标（东西向）和y 坐标（南北向）,应如何确定主管道的最优位置, 即使各油井到主管道之间的输油管道长度总和最小的位置?证明可在线性时间内确定主管道的最优位置。(An oil company plans to construct a east to west from the main pipeline. The pipeline to pass through an oil field n wells. Wells from each must have a pipeline along the shortest path (or South or North) connected with the competent Road. If given the location of oil wells in n, that is, their x coordinates (east-west) and y coordinates (north-south), should be how to determine the optimal position in charge of Road, even if the wells to the pipeline in charge of Road between the sum of the smallest length location? proved to be linear time to determine the optimal position in charge of Road.)

使用STC89C52单片机实现对PGA2311和CD4052的控制，进而实现对功放音量的控制。(The control of PGA2311 and CD4052 is realized by using STC89C52 single chip computer, and then the volume of power amplifier is controlled.)

. 采用 STM32 单片机基于 uCOS II 系统控制 VS1053B 语音芯片制作的 MP3 播放器   一看到 uCOS II ，就觉得是个高级货，绝对不是一般的小打小闹。该制作耗时半年能完成制 作，不得不佩服作者的坚持。这个使用了 V

基于AE，可显示shp文件，自行下载 市级行政单元 的shp文件，并添加数据至 mapControl 中，点击要素，即可显示 该市 天气，且有实时、今日、未来六日天气预报

说明：  手写VPN，模拟IP in IP的VPN路由，包括服务器端和客户端(VPN Server Writen by C++)

Rijndael加密算法的一个实现，可用来对文件及字段进行加解密，并利用mfc做了界面(An implementation of Rijndael encryption algorithm, can be used to encrypt and decrypt files and fields, and made use of the interface mfc)

nios学习资料，fpga调用外部sdram实例，值得初学者下载。(nios learning materials, fpga call external sdram instance, it is worth beginners to download.)

木马编程DIY第1篇之功能实现.zip doc文档资料(Trojan programming a function of the DIY realize zip doc documentation)

mtk绝密培训资料(MTK top-secret training materials)

具体实现原理详见 SkinHelp.cs类，实现了对原有控件的重绘，详见源码