本文从信号量、管程和消息传递三个方面讨论了进程间的同步问题，并分别给出了关于生产者/消费者问题的解决算法，最终还分析了以上三种方法的优缺点。...

此文章先从理论上说明了OFDM系统的实质，然后构造了OFDM系统的MATLAB仿真-This article first describes the OFDM system in theory, in real terms, and then construct a MATLAB simulation of OFDM systems

五层电梯控制系统，实现电梯的运转，并且按照自己的指示实现电梯的升降。加一些外围电路等控制芯片组成了电梯控制系统的硬件配置-five-story elevator control system, the functioning of the lift, according to his own instructions to achieve lift-off and landing. Plus some external control circuit chip components on the elevator control system hardware configuration

网络组建 校园网的组建 与安全维护 为2008年全国职业院校技能大赛复习资料-Network formed

QPSK的详细设计流程，及仿真图像，是做设计的重要参考。-QPSK the detailed design process, and the simulation images, are doing an important reference for the design.

这是介绍在VC++6。0下如何编写GPIB程序。有一定的参考价值-This is a presentation at the VC 6. 0 GPIB preparation procedures. A certain reference value

BI,商业智能，杨大川的教程，从基础到高及，很有用哦.还是一样，办内资料比较少，这是比较好的中文资料啦-BI, business intelligence, Yang Dachuan curricula, from elementary to high and, oh useful. Still, the Office of the data is relatively small, this is a good Chinese data--

Ward wireless call system，无线病房呼叫系统设计-Ward wireless call system, wireless system design wards Call

关于ADSL的系统协议结构以及VOIP语音通话的处理线路.-Agreement on the structure of ADSL systems and VOIP voice processing lines.

GPS方案模块框图，如有兴趣可以参考框图设计GPS,很有参考价值-GPS module diagram of the program, who are interested can refer to diagram design GPS, a good reference

根据设定好的密码，采用二个按键实现密码的输入功能，当密码输入正确之后，锁就打开，如果输入的三次的密码不正确，就锁定按键3秒钟，同时发现报警声，直到没有按键按下3种后，才打开按键锁定功能；否则在3秒钟内仍有按键按下，就重新锁定按键3秒时间并报警。-err