通讯系统

This dissertation first introduces the hardware connection between the RS - 232 connection and the electric cable line in the numerical control workshop network communication, then it analyzes and compares syzygy type network topology and star topology based on serial port expansion card.

本文首先介绍了数控车间组网通讯中RS232C接口与电缆线的硬件连接，然后对点对点式网络拓扑结构和基于串口扩展卡的星型拓扑结构进行分析与比较，从而得出数控车间串行通信连接系统的最佳方案。

This system is a multi-functional modern communication products combined with Gigital Exchanger and Master Phone ,Multi-power output,Wire/wireless remote talk-back, General Alarm, Enterainment, Hand-phone ,Satellite-ground station.

本系统集数字程控交换、公共广播扩音机、通用报警为一体的多功能现代化通讯产品。使用方便

And that,teledata transfer are realized through Lines of Communication which is build-up by MODEM and Public Switched Telephone Network.

系统还利用由MODEM和公用电话交换网组成的通讯线路进行远程数据传输。

More and more practical data in sensor network、communication、Internet flow analysis and Web log etc, are transported from teledata sources. Therefore, we need to construct the middleware of distributed query processing for data streams to support above application.P2P technique is used to build a huge distributed network for the processing of large number of information by internet terminals.

现有的数据流的研究主要为集中式的流数据系统，而数据流的本质是分布式的，越来越多如传感器网络、数据通讯、Internet流量分析和Web日志等的大量数据都来自不同的远程数据源，因此，需要构建分布式数据流查询处理的中间件以支持上述各种应用。P2P技术利用互联网的终端机来建立一个庞大的分布式计算网络，并对迅速涌出的大量信息进行处理。

This paper is composed of the design of the public vehicle onboard information terminal unit and bus stop reporter"s hardware circuit, the system"s software and the wireless communication.

本文包括了随车控制器硬件电路的设计、软件程序的设计，语音报站系统硬件电路的设计以及软件的编制、无线通讯的设计以及控制调度中心软件的设计等。

After this , it discusses the computer control system of the toolkit.

本控制系统采用的是PC机与单片机串行通讯的方式，来实现对自动工具库的可视化控制，这也是本课题的主要研究内容。

Experiment show that the system has the advantage of higher transfer rate and better reliability.

实验表明该系统具有通讯速率高和可靠性强等优点，具有广泛的应用前景。

Chengdu Dragon Technology Limited was founded in 2001, is specialized in networking products, communications, system integration of high-tech enterprises, is UF's long-term partners.

成都市龙成科技有限公司成立于2001年，是专业从事网络产品、通讯、系统集成的高科技企业，是用友的长期合作伙伴。

South Korea 's antitrust watchdog on Wednesday ordered Microsoft to pay a Won33bn (US$31.9m) fine and unbundle its Messenger and Media Player from its Windows operating system, a move which might force the software giant to withdraw from the country.

星期三，韩国的反垄断机构命令微软公司支付三十三亿韩元（即3190万美元）的罚款，并且将其即时通讯软件和媒体播放器从 windows 系统中解除绑定，这可能迫使这个软件巨人从该国市场中撤出。

This thesis makes a detailed research into the Universal Serial Bus Mass Storage Class Specification and its relevant protocols, and builds up a set of protocol stack under the embedded Linux environment of the StrongARM processor development platform according to this specification, with which the hand-held device can communicate with the PC system easily.

本文详细分析了USB海量存储设备类规范(Universal Serial Bus Mass Storage Class Specification)及其相关协议，并在StrongARM处理器开发平台的嵌入式Linux环境下设计了一套基于此规范的嵌入式协议栈，使掌上设备可以很方便地通过USB与PC系统进行数据通讯。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。