查询词典 wireless compass

The main products: Internet telephony, wireless access Desk, to wireless, public wireless, wireless internet, chargers, power adapters.

主要产品：网络电话、无线接入台、无线商话，无线公话，无线上网卡，充电器，电源适配器。

The designing idea and realization method of a wireless tachometer of the engine with the wireless transmission technique were discussed.The design of the hardware and software of the wireless tachometer system was provided,based on TX100/RX100 ASK wireless receiving and transmitting radio module, real time clock chip PCF8563,AT89C2051 microcomputer and four-bit serial segmentary LCD of EDM1190A.

提出了一种应用无线传输技术的发动机无线转速表的设计思路及实现方法，给出了基于TX100/RX100ASK无线射频收发模块组、实时时钟芯片PCF8563、AT89C2051单片机和4位串行段式液晶显示器EDM1190A的无线转速表系统的硬件和软件设计。

In this dissertation, the characteristics of the OFDM wireless channel are modeled and simulated, the work as follow has been completed.(1) Based on studying the theory of the spread of wireless channel, the characteristics of wireless channel are analyzed, the models of a variety of fading channel are established, and the model of the wireless channel with tap delay line and Jakes channel model are designed.

本文主要是对OFDM系统无线信道特性进行建模与仿真，完成了以下工作：(1)在研究了无线信道传播理论基础上，分析了无线信道传播特性，建立了各种衰落信道的结构模型，设计了无线信道抽头延迟线模型和Jakes仿真模型。

This instrument combines wireless RF module with singlechip. It can realize measurement, preservation and distant wireless communication all-in-one. It not only can measure and show snap cap's resistance quantity intuitively, but also can transmit data to monitoring center's PC by wireless in time. It makes data vision and data recognition. It can deal with the resistance's data the is measured in blasting scene by wireless. It provides more safety control and convenience for the employees in scene operation.

该设备将射频无线模块与单片机系统相结合，实现了数据测试、保存、远距离传送一体化，不仅能够快速直观的测试并显示出雷管的阻值，而且能及时地将测试数据以无线的方式传送给监控中心的PC机，由PC机进行数据的显示和识别，成功地实现了爆破现场雷管电阻测试数据的无线处理，为现场作业提供了更为可靠的安全保障，并极大地便利了工作人员的现场作业。

RF modules covering GSM, CDMA, TD-SCDMA, WCDMA, WLAN and Wimax wireless communications systems, active modules include power and frequency of the linear power amplifier, transceiver components, modules and integration of selected frequency modules, Passive radio frequency modules, including various types of filters, diplexers, a road, splitters and couplers; wireless network optimization campaign整机including PHS, GSM, CDMA, TD-SCDMA and WCDMA straight-machine, RF Rafah Yuan and indoor distribution systems, digital television, including digital TV mobile wireless transceiver modules, wireless transponders, digital mobile TV repeater, and so on.

射频模块涵盖了GSM、CDMA、TD-SCDMA、WCDMA、WLAN和Wimax等无线通信系统，有源模块包括各种功率和频率的线性功率放大器、收发组件、选频模块和一体化模块等，无源射频模块包括各类滤波器、双工器、合路器、功分器和耦合器等；无线网络优化系列整机包括PHS、GSM、CDMA、TD-SCDMA和WCDMA直放机、射频拉远和室内分布系统等；数字移动电视包括数字电视无线收发模块、无线转发器、数字移动电视直放站等。

Firstly, the thesis introduced the development of VOD, the background and meaning of the program, then the author introduced the associated technology, mainly including the feature of multimedia, video compression technology and the protocols SCTP and RTP. Considering the ambulant of host , fluctuation of bandwidth,high error rate data in wireless networks ,the author proposed some QoS strategy in the wireless networks such as RTP/SCTP protocol stack , connection control of the server, two buffers in the client end point.,TFC congestion control algorithms ,etc. Based these strategies, the team members gives the software and hardware solution of the wireless video-on-demand system and gives the main modules design of the software system. The system adopted the C/S structure including two parts: server and client ,using the Mpeg-2 which is apporiate for networks as the supported format. The thesis emphatically researches on the video-serving module of the server and the sink module, player module of client.

本文首先介绍了视频点播系统的发展现状、课题的研究背景和意义；接着对课题的相关技术进行概述主要包括了多媒体特点，压缩技术，传输协议SCTP以及RTP；针对无线环境的节点移动性，带宽波动性，数据错误率高等三大特点，作者研究设计了无线环境下的QoS策略：RTP/SCTP协议栈，服务器准入控制机制，客户端双缓冲区，TFRC拥塞控制机制等；在这些策略的基础上设计了系统的软硬件解决方案，并对软件体系结构的主要模块进行了设计，整个视频点播系统采用C/S结构，由服务器，客户端2个部分组成，使用适合网络传输的流媒体格式Mpeg-2作为系统支持的格式，文中重点研究了服务器的视频服务模块以及客户端的接收模块和播放器模块，并利用线程池技术对系统进行实现。

A wireless system for use in a low power data communications in a sub-millimeter wave zone includes at least one wireless communications device including a directional antenna whose cross-polarization discrimination is not less than 24 dB, wherein the wireless system uses a plurality of planes of polarization selectively.

一种用于亚毫米波带中的低功率数据通信的无线系统包括至少一个无线通信装置，该无线通信装置包括交叉极化鉴别率不小于24dB的定向天线，其中，该无线系统有选择性地使用多个极化面。

The combination of wireless communication and computer network brings out the wireless network, which has the advantages of instantaneousness, convenience and high data rate. It is suitable for short-range and high data rate wireless communications.

无线通信技术和计算机网络技术的结合，产生了无线网络技术，它具有即时、便捷、高速的优点，适用于短距离无线高速通信环境。

The wireless interphone is an important branch in mobile communication,it is very extensive to use,and as a wireless interphone to receive part of the wireless interphone is a very important component.

无线对讲机是移动通信中一个重要的分支，应用非常广泛，而做为对讲机接收部分更是整个对讲机非常重要的组成部分。

The main products include wired / wireless optical mouse, wired / wireless mini mouse, wired / wireless into the oil mouse, mechanical / wheel mouse, series gift mouse, keyboard, hub, U disk and the computer tool kits, etc..

主要产品包括有线/无线光电鼠标、有线/无线迷你鼠标、有线/无线入油鼠标、机械/滑轮鼠标、系列礼品鼠标、键盘、集线器，U盘和电脑工具包等。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。