共查询到20条相似文献,搜索用时 46 毫秒
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乐义文;和敬涵 《电子技术与软件工程》2016,(18):48-49
电力网络主要是为满足供电需求而设计,具有单向电力传输和供给、故障手动恢复等特点,导致电网管理复杂、维护代价高。随着信息技术的飞速发展,集成有先进通信系统的智能电网已成为未来电力网络发展的主流。本文对智能电网通信系统的应用场景进行了详细构建和描述,并对其所面临的挑战进行了深入剖析,对研究用于保障关键信息交互的智能电网高可靠通信系统提出了有效的方向性建议。 相似文献
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文章介绍了抗单粒子翻转容错处理器NBHARK的结构与实现.采用了改进的优化奇权重列编码方法纠检寄存器文件的瞬时错误。提出了多种有效方法提高整个处理器可靠性,如三模冗余内部临时寄存器,三模冗余时钟,片上EDAC,奇偶校验,强制cache缺失等。该芯片在smic0.18μmCMOS工艺投片。辐射试验表明,粒子注入(〉50,000)引起的单粒子翻转错误均成功纠正。试验采用^252Cf辐射源,3.5uCi,以及43MeV.cm^2/mg平均LET进行。 相似文献
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提出采用UDP协议,在C语言编程环境下设计和实现基于UDP协议的Jabber系统,从而达到最大限度发挥无线网络传输协议本身功能的目的.并在Jabber系统模块中,实现无线网络中的可靠传输和连接保持等功能. 相似文献
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主要介绍了典型电台录制机房从设计到建设完成的整个过程,从土建声学、工艺设计、操作台设计、设备配置选型几个方面逐一说明了录制机房建设过程中的经验,以及需要重点考虑和注意的问题。 相似文献
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列举了影响户外柜式通讯电源系统的自然环境因素,并论述了各个因素对产品可靠性的影响机理,提出了产品设计时需要考虑的要点。为该类产品的环境适应性设计和可靠性设计提供了必要的参考,对其它户外电子设备也有借鉴意义。 相似文献
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为了提高电磁型欠压脱扣器的可靠性,在评估现有设计方案不足的基础上,通过优化主回路结构,提出了一种新的高可靠性电磁型欠压脱扣器设计方案。结合这种新方案,对主回路、单片机电路与电源电路等关键问题进行具体分析与设计。实验表明,本方案具备整体电路自身功耗仅为毫瓦级水平,动作点准确度达±2 V,并兼顾到成本低廉。方案成功通过了1.3倍电网电压老化与4 kV脉冲群考核试验。 相似文献
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Seongwon Han ;Youngtae Noh ;Richard Liang ;Roy Chen ;Yung-Ju Cheng ;Mario Gerla 《中国通信》2014,(5):49-59
The deployment of underwater networks allows researchers to collect explorative and monitoring data on underwater ecosystems.The acoustic medium has been widely adopted in current research and commercial uses,while the optical medium remains experimental only.According to our survey onthe properties of acoustic and optical communicationsand preliminary simulation results have shown significant trade-offs between bandwidth,propagation delay,power consumption,and effective communication range.We propose a hybrid solution that combines the use of acoustic and optical communication in order to overcome the bandwidth limitation of the acoustic channel by enabling optical communicationwith the help of acoustic-assisted alignment between optical transmitters and receivers. 相似文献
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Peter King Ramachandran Venkatesan Cheng Li 《Wireless Communications and Mobile Computing》2010,10(11):1521-1532
Development of communication channels for underwater sensor networks holds many unique challenges. Communication near the bottom of the ocean is no exception as the effects of reflection and refraction greatly affect how acoustic waves travel between a source and an intended receiver. Deployment and testing in the ocean are difficult and expensive; thus there is a strong reliance on models to aid in design and development of a potential network. Since each ocean region can present very unique challenges, it is of great value to model an environment based on real environmental parameters whenever available. A well prepared channel model will provide the ability to show channel capacity as it relates to node positions, as well as showing the performance of modulation techniques to an environment with propagation characteristics and path arrivals. This channel model will also be implementable into a simulation package to allow for high quality simulation of higher level protocols. The proposed method has proved to be a useful tool in modeling a particular environment and provides insight into underwater sensor node placement and modulation. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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The deployment of underwater networks allows researchers to collect explorative and monitoring data on underwater ecosystems.The acoustic medium has been widely adopted in current research and commercial uses,while the optical medium remains experimental only.According to our survey onthe properties of acoustic and optical communicationsand preliminary simulation results have shown significant trade-offs between bandwidth,propagation delay,power consumption,and effective communication range.We propose a hybrid solution that combines the use of acoustic and optical communication in order to overcome the bandwidth limitation of the acoustic channel by enabling optical communicationwith the help of acoustic-assisted alignment between optical transmitters and receivers. 相似文献
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跳频通信系统与常规定频通信系统相比具有较强的抗干扰能力。在介绍水声跳频通信基本原理的基础上,分析了在部分频带干扰下的跳频通信系统的抗干扰性能,并提出利用信号分集技术解决部分频带干扰问题。借助MATLAB仿真工具,得到不同情况下的误码率.信噪比曲线,从而验证了理论分析的结果。 相似文献
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随着现代"网络中心战"理论的完善,现代立体化信息战争已从传统的空天地战场延伸至海面以下战场。水声通信技术是构建水下通信网络的有效手段,是构建立体化战争、立体化作战平台的必要技术。首先分析了水下通信与水声网络的特点和发展现状。其次,结合美国海军在水声通信网络的实验研究成果,以及国内在该领域内取得的研究进展情况,展望了水声通信网络在现代海军建设中的应用前景。 相似文献