共查询到19条相似文献,搜索用时 140 毫秒
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文中采用国内外船舶定线制常用的研究方法,对湄洲湾湾口附近水域的船舶习惯航线、船舶交通流特点、海上交通事故的特点等内容进行调查与分析,结合IMO关于定线制的有关规定,研究和探讨了湄洲湾湾口船舶定线制的设计。 相似文献
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本文结合厦门湾的船舶交通流情况,研究在鼓浪屿西南附近水域航行条件及船舶航行特点,提出在该水域船舶航行安全的对策,以期对保障船舶在该水域的安全航行有所助益。 相似文献
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船舶定线制是海上(水上)交通繁忙、复杂区域的重要通航管理手段,代表着先进的海事管理理念及海上船舶航行秩序管理的发展方向。其效果已为世界所公认。我国已先后在成山头、长江口、珠江口、长江中下游、老铁山水道、琼州海峡等十余处重点水域推行了船舶定线制。产生了良好的社会效益和经济效益。2009年12月1日起在曹妃甸水域推行船舶定线制和报告制,将会对该水域通航环境的改善、水上安全形势的持续稳定、水域和航路使用效益的提升等起到积极的促进作用,对环渤海地区临港工业和沿海经济带的安全快速发展产生积极而深远的影响。 相似文献
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为加强罗源湾附近水域船舶的航行安全,通过IMO船舶定线制考虑的因素及罗源湾附近水域特点,确定了影响该水域船舶定线制通航安全的多种因素,从一致性、合理性、警戒区必要性以及自然条件4个方面建立该水域船舶定线制方案的评价体系,利用AHP的赋权方式确定指标权重,通过物元理论评价模型,对4组船舶定线制规划设计方案进行安全性评价,为完善船舶定线制,提高水域的综合利用提供建议和参考.研究表明:该方法能高效地处理评价船舶定线制多个定性、定量指标所引起的矛盾和不确定性的问题,使评判结果更加合理.同时,也可为其他水域的船舶定线制评价提供指导. 相似文献
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探讨了曹妃甸附近水域实施船舶定线制的必要性和可行性,认为在该水域实施船舶定线制对保障船舶航行安全和保护海洋环境是十分有利的,为海事部门对该水域的规划治理提供参考依据。 相似文献
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基于电子海图的船舶定线辅助系统软件的实现 总被引:4,自引:2,他引:2
以船舶定线研究为目的,开发基于电子海图的交通数据处理与分析的软件,实现海上交通调查数据的计算机处理、交通流模式分析及定线技术的应用。 相似文献
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This paper presents a novel forward dynamic programming method for weather routing to minimise ship fuel consumption during a voyage. Compared with traditional weather routing methods which only optimise the ship’s heading, while the engine power or propeller rotation speed is set as a constant throughout the voyage, this new method considers both the ship power settings and heading controls. A float state technique is used to reduce the iterations required during optimisation and thus save computation time. This new method could lead to quasi-global optimal routing in comparison with the traditional weather routing methods. 相似文献
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Intergraph Smart 3D软件的电缆敷设功能在化工电力行业应用较为广泛,考虑到邮轮电气生产设计中的电缆具有长度长(3 000 km~5 000 km)、种类多、通道网络复杂和分段敷设的特点,直接应用Smart 3D原生的电缆敷设功能进行电缆敷设存在较大的风险。从邮轮电缆敷设需求出发,对Smart 3D原生电缆敷设解决方案进行优化,充分考虑电气设计人员的使用习惯,基于贪心算法和单源最短路径算法(Dijkstra算法)优化算法解决断续托架的电缆敷设和电缆分区敷设最优路径选取的问题,提高电气设计人员的电缆敷设效率。 相似文献
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This contribution investigates the economic benefits of using weather ship routing on Short Sea Shipping (SSS) activities. The investigation is supported with the development of a ship routing system based on pathfinding algorithm, the parametrization of the wave effect on navigation, and the use of high-resolution meteo-oceanographic predictions. The optimal ship routing analysis is investigated in a European SSS system: the link between Spanish and Italian ports. The results show the economic benefits using ship routing in SSS during energetic wave episodes. The rate of cost savings may reach 18% of the total costs under particular bad weather conditions in the navigation area. The work establishes the basis of further developments in optimal route applied in relatively short distances and its systematic use in the SSS maritime industry. 相似文献
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船闸通过能力与日平均过闸次数、一次过闸吨位、年通航天数、船舶装载系数以及运量不均衡系数有关,在船闸运营过程中这些因素都存在一定的不确定性,对船闸通过能力的计算产生很大的影响。为消除不确定性因素的影响,采用基于MC法的计算机仿真研究船闸通过能力,并以新夏港河船闸年过闸货运量作为研究对象予以说明。运行结果表明,计算机仿真能够较好地应对不确定性问题,为船闸工程建设中船闸通过能力计算提供理论依据。 相似文献
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《船舶与海洋工程学报》2021,(3)
Water transportation today has become increasingly busy because of economic globalization.In order to solve the problem of inaccurate port traffic flow prediction,this paper proposes an algorithm based on gated recurrent units(GRUs) and Markov residual correction to pass a fixed cross-section.To analyze the traffic flow of ships,the statistical method of ship traffic flow based on the automatic identification system(AIS) is introduced.And a model is put forward for predicting the ship flow.According to the basic principle of cyclic neural networks,the law of ship traffic flow in the channel is explored in the time series.Experiments have been performed using a large number of AIS data in the waters near Xiazhimen in Zhoushan,Ningbo,and the results show that the accuracy of the GRU-Markov algorithm is higher than that of other algorithms,proving the practicability and effectiveness of this method in ship flow prediction. 相似文献