通信的

German technology, professional spirit and innovative attitude are perfectly extended and embodied in the research, development and marketing of sbcs's communication products and services.nsbcs was established in 1993 and is part of siemens information and communication networks.

n150年的发展历史，已经见证德国西门子公司始终是世界电子工程领域的全球领导者。同样，在中国，西门子数字程控通信系统有限公司，在经历了十五多年的成功发展后，为中国企业提供了具有革新意义的商务通信解决方案。

The scarceness of wireless spectrum hampers the sustainable development of wireless communication services. Recently, the wireless communication community has realized that the static spectrum allocation method is the main cause of the shortage of wireless spectrum.

中文摘要无线频谱的紧缺是限制无线通信与服务应用持续发展的瓶颈，近年来，无线通信业界普遍认识到，静态的频谱分配方式是造成当前频谱资源日趋缺乏的一个主要原因。

The system based on PLC is designed to meet the need of stability, which PLC is used as a main station to control producing and communicating, while HMI as slave station to display, record, manage and modify the data.

针对烟机生产要求高可靠的特点，作者采取了基于可编程逻辑控制器的解决方案，利用可编程逻辑控制器的运行稳定和可靠的优点，由可编程控制器作为现场控制器和通信主站，负责生产控制和通信，由计算机操作站作为从站，负责数据的显示、记录、管理及参数调整。

This paper studies some communicative problems necessary for accommodating-err mechanism between management station and management agent, as well as necessary for synchronism mechanism to lead in.

研究了管理站点和管理代理通信中存在的一些需要容错的问题以及管理代理和监控模块间通信引入同步机制的必要性，论述了4种被动容错机制和1种主动容错机制以及信号灯机制的设计和实现过程。

Leading Corporate Communications, enjoy the new communication; to planning, easy management, communication networks, dynamic, efficient and readily available; to lodge a complaint of Group Tel: no need to purchase expensive PBX without bidding trunk, with no full-time switchboard operator ...

引领企业通信，尽享全新沟通；可规划、易管理的通信网络，动态、高效、随时可用；零投诉的集团电话：无需购买昂贵的程控交换机，无需申办中继线，无需配备专职的总机话务员。。。

First, this thesis describes the non-ideal effect of frequency synthesizer on the performance of wireless communication system.

首先，本文系统研究了频率综合器中的非理想因素对无线通信系统的影响，并通过理论计算得出多模通信系统对频率综合器的指标要求，进而探讨了多模频率综合器的实现方案。

We deeply research the radio communication networks, give two fast algorithm for computing the ST reliability of RCN, which are very simple and effective to the networks that its topological structure isn't complex, The thesis having been published to the reliability for RCN only have factor algorithm, so we can say the algorithms are the achievements of innovation, we solve the rapid computing the ST reliability for RCN problem.

对于无线通信网络可靠性计算的研究目前只有因子分解算法，因此可以说这两个算法的给出是开拓性的，解决了无线通信网络可靠性的快速计算问题。

The results are the information transmission capacity of communications essentially lies on information carrier and information transmission mode,and on nowadays communication modes the information carries only by use of the space degree of freedom of signals and the information transmits only by use of the undulatory property of signals.

研究结果表明，通信系统的信息传输能力由信号承载和传输信息的方式决定；现有电子通信系统中信号处于低速宏观态，仅利用空间自由度承载信息和波动性传输信息，香农公式定量描述了该状态中信号的信息输运能力；高速态、微观态或介观态信号的信息输运能力有可能突破香农公式限制。

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FIFO可以说是管道的推广，克服了管道无名字的限制，使得无亲缘关系的进程同样可以采用先进先出的通信机制进行通信。

The article introduces the kinds of multi-function Watt-hour meter used at home,the corresponding interface of communication,and protocol of communication.

介绍了当前国内使用的三相多功能电能表的类别及其对应的通信接口、通信规约；描述了通用自动抄表模块的原理、硬件组成、软件构成及其在抄表系统中的应用。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。