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本文主要介绍了最新的WiMAX技术及特点,针对目前VTS系统中AIS系统采用VHF通信方式存在的问题进行分析,并提出采用WiMAX技术解决VHF通信方式带来的技术瓶颈,提高VTS系统的应用能力。 相似文献
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为减少船舶交管系统(VTS)操作员工作量,提高智能化与自动化程度,方便快捷地完成VHF语音通信,提出了一种自动甚高频数字选择性呼叫(VHF DSC)系统设计方案.该系统主要由VHF组件、数据处理器和DSC呼叫序列处理单元组成.通过对雷达目标船的录取,数据处理器对雷达和自动识别系统(AIS)的信息进行数据融合与关联,提取出被呼叫船的海上移动业务识别码,DSC呼叫序列处理单元自动编辑VHF DSC的呼叫序列,VHF组件发出呼叫信号建立无线通信链路,自动完成VHF语音通信前的沟通.实践验证了系统的正确性与可行性,增强了VTS对数据信息的处理能力,提高了VTS的智能处理水平. 相似文献
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天津港VTS区域VHF通信分区分频管理探讨 总被引:1,自引:0,他引:1
为解决由于天津港复式航运建成而带来的通信拥堵问题,文章从实际需要出发,全面分析天津VTS区域VHF通信现状,并借鉴国际、国内经验,提出了在VTS区域内进行通信分区分频管理的方案。 相似文献
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互联网技术和计算机技术的迅速发展,使大数据和云计算平台逐渐成熟,并应用于多种工业控制和通信领域中。舰船交通管理系统(VTS)可以有效提高船舶航行效率,改善航运交通,但传统的VTS存在精度低、数据处理能力差等缺点。本文针对舰船交通管理系统的信息融合系统进行研究,并基于云计算技术和AIS技术开发了一种新型的VTS信息融合系统。仿真试验表明,基于云计算的VTS信息融合系统不仅雷达信号处理能力强,而且可以进行多任务并行工作,有效改善了VTS的效率。 相似文献
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<正>0 引言船舶交通服务(Vessel Traffic Service,VTS)作为一种成熟、可靠的航海辅助手段,可以有效提高船舶航行安全和效率,保障海上人命安全以及减少溢油和船舶污染事故。VTS的服务对象主要是组成驾驶台团队的航海人员,包括船长、引航员、值班驾驶员以及参与船舶驾驶台值班的其他船员。VTS对航海人员提供的相关服务通过双方进行有效通信实现。通信的主要内容包括VTS向航海人员提供信息服务、交通组织服务、助航服务和支持联 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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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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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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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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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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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