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国际海上人命安全公约(SOLAS)1988年修正案,对船舶无线电通信提出新的要求,船舶无线电通信要采用全球海上遇险安全系统(CMDSS),从而开始厂海上无线电通信新的一章。 相似文献
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在海上高频(HF)波段使用数据无线电通信技术已经成为全球航运界关注的热点。论文阐述了海上HF数据和电子邮件无线电通信业务;同时对调制解调(MODEM)协议使用的关键技术进行了分析和研究,这将有助于我国有关部门和机构跟踪和研究这一新技术,并提出应对措施。 相似文献
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海上无线电通信计划(MRCP)是协助电子导航和全球海上遇险与安全系统(GMDSS)所需的无线电通信系统,并为支持电子导航、GMDSS和海洋自治系统的发展做出预测。本文以此为背景,介绍了目前海上无线电通信情况和存在的问题,同时,提供了关于其未来发展的一些思考和建议。 相似文献
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胡映玉 《船舶设计技术交流》1994,(4):28-34
本文根据《海船法定检验技术规则》修改通报(1994)对无线电通信设备的配备要求,简述了全球海上遇险与安全系统(GMDSS)以及它的配备、选型和功能。 相似文献
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传统的海上船舶通信方式以GPS通信、无线电通信、短波通信等为主,随着互联网技术和计算机技术的迅速发展,海上船舶通信方式有了长足进步。本文主要研究移动Ad Hoc的网络通信的原理与发展历程,重点介绍该网络通信协议和硬件组成,并基于移动Ad Hoc通信网络,开发了船舶的通信与导航终端显示模块。 相似文献
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价值观是指人们对价值的性质标准、构成和评价的基本看法和态度,是指导人的行为的一系列基本准则和信条。构建海事核心价值观是时代发展的要求,更是海事自身发展的需要。 相似文献
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This chapter presents a summary of the findings of the workshop on ‘Analytical and Institutional Methods and Frameworks’. The paper discusses the nature of the analytical methods used in the papers presented and the purposes for which they were employed, which were generally to either assist in the planning and operation of public transport or to monitor the efficiency and effectiveness of transport services. Subsequent sections examine issues related to data collection and management, and the more general issue of institutional arrangements. Policy and research agendas needed to support further consideration of the subject are then identified. 相似文献
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介绍青藏高原多年冻土的冻融特性,并结合我局在青藏铁路十二标段的具体施工,分析了冻土的冻融特性及具体防止措施. 相似文献
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Geoffrey Wood 《Maritime Policy and Management》2004,31(2):157-171
This paper explores the current state of coastal and inland shipping in Tanzania. It provides an overview of the state of ports and shipping in Tanzania, and the reasons underlying the present crisis of competitiveness in terms of both global pressures and national and regional dynamics. Problems of competitiveness are at least partially due to under-investment, management failures, skills shortfalls and difficulties in interfacing with the railway network. Less easy to resolve structural problems include the great imbalance between imports and exports, heightened regional competition and ongoing political instability in the Great Lakes region. 相似文献
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风量与风压的简易测量及应用 总被引:2,自引:0,他引:2
锅炉正常燃烧必须有充足的风量,当锅炉鼓风或引风不足将导致锅炉效果恶化,锅炉出力、热效应率明显下降。结合工程实例,介绍结托管简揭测试鼓、引风系统各部分风压、风量,帮助判断分析工程实际问题的简便方法。 相似文献
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Elizabeth A. Wilman 《Coastal management》2013,41(3):211-230
As the controversy over Outer Continental Shelf (OCS) oil and gas leasing continues, with environmentalists and fishermen seeking to block or delay leasing decisions that they think will adversely affect their interests, the need for better estimates of the environmental costs associated with OCS development becomes increasingly apparent. Although high degrees of precision in such estimates may never be economic, let alone feasible, better knowledge would reduce the uncertainty surrounding the magnitude of such costs, and would make it easier to come to grips with the problem and reduce, if not resolve, the controversy. 相似文献