本程序包括聊天室的客户端和服务器端，使用CSocket

虽然Windows下可视化开发工具如VC、Delphi、C＋＋ Builder等都有专用的定时器控件Timer，而且使用很方便，可以实现一定的定时功能，但最小计时精度仅为55ms，且定时器消息在多任务操作系统中的优先级很低，不能得到及时响应，往往不能满足实时控制环境下的应用。不过Microsoft公司在Win32 API函数库中已经为用户提供了一组用于高精度计时的底层函数，如果用户使用得当，计时精度可到1ms。这个计时精度、对于一般的实时系统控制完全可以满足要求。现将由C＋＋ Builder 4.0提供的重新封装后的一组与时间相关的主要接口函数（函数名、参数、功能与Win32 API基本相同）说明如下： -visual development tools such as Visual C++, Delphi, C++ Builder and others all have dedicated Timer timer control, but it is convenient. can achieve a timing function, but only the minimum time of 55 ms accuracy. Timer news and multi-task operating system in the low priority that is not to respond in a timely manner, often fail to meet the real-time control environment applications. However, Microsoft Corporation in the Win32 API function has been to provide the user with a group for high-precision the bottom was a time function, if the user is properly utilized, time accuracy can be a ms. Accuracy this time, and for most of the real-time control system can meet the requirements.

j3me java-j3me java

Simulation of Ad-Hoc routing protocols using OMNeT-Simulation of Ad-Hoc routing protocols using OMNeT++

PPP Deflate压缩协议（PPP Deflate Protocol） 摘要 点到点协议（PPP）[1]提供了一种在点到点链路上传输多协议数据报的标准方法。压缩控制协议（CCP）[2]提供了一种在PPP封装链路上协商和使用压缩协议的方法。本文档描述了如何使用PPP Deflate压缩协议压缩PPP封装报文。 -PPP Deflate compression protocol (PPP Deflate Protocol) Abstract point-to-point protocol (PPP) [1] provides a point-to-point link, the multi-protocol data transmission of standard methods. Compression Control Protocol (CCP) [2] provides a link in the PPP Packaging consultations on the agreement and the use of compression method. This document describes how to use the PPP Deflate compression compression PPP agreement Packaging paper reported.

串口控件编程，使用mscomm控件，串口控件有别于文件流方法，易学易懂，但是必须安装这个控件。-Serial control programming, using mscomm control, serial control is different from the file stream method, easy to learn and easy to understand, but must install the controls.

这是个经典的用api进行串口编程的例子- This is classical carries on the string mouth programming with api the example

板卡驱动，非常有效的。关于数字电视。没设么可说了-Board-driven, very effective. With regard to digital TV. The absence of what can be said that the

This program generates BPSK signal waveforms and plot the power spectrum of unfiltered BPSK.

这是XMODEM传输协议原代码,测试只能证明错误的存在，而不能表明程序中没有错误。 测试的两个作用是：确定程序中缺陷的存在；有助于判断该程序在实际上是否可用。 软件测试最困难的问题之一是知道何时停止测试(When to stop testing? ) 自己测试自己的程序是不可能的。 当一个软件被测出的缺陷数目增加时，更多的未被发现的缺陷存在的概率也随之增加。 -This XMODEM transfer protocol source code, the test can only be proved wrong there and not show anything wrong procedure. The two test role is : procedures for determining the existence of defects; Contribute to the judge whether the procedure can be used in practice. Software testing the most difficult one of the problems is to know when to stop testing (When to stop testing) testing their own procedures is not possible. When a software detected the increase in the number of defects, more undiscovered flaws in the probability has increased.

应用背景应用于通信系统信号的调制解调实例，通过systemview软件搭建通信系统仿真平台，给出了信号的调制解调过程及波形具体形式，为与通信实际环境相关，采用高斯噪声模拟通信信道。关键技术SystemView主要用于搭建通信系统平台，采用了软件中的相关器件实现信号的调制及发射。采用低通滤波等得到基带信号，然后采用单刀双掷开关等器件完成判决，实现解码。