共查询到20条相似文献,搜索用时 64 毫秒
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针对船舶管路系统中性化学清洗过程中管内返锈问题,讨论了管内返锈的机理及影响因素.通过试验研究,得出了温度、湿度、氧及大气环境污染等因素对管内返锈的影响规律. 相似文献
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燃油系统是船舶生命力的保障,因此,对它的检验十分重要.1991年<内河钢船建造规范>和1999年<内河船舶法定检验技术规则>对船舶燃油系统都进行了明确规定.笔者结合验船实践,浅谈内河货船燃油管路系统检验的注意事项. 相似文献
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根据渤船重工有限公司建造的320 000 tVLCC超大型原油船的生产实际经验,从节省能源、节约材料角度阐述了超大型船舶管路综合布置的优化设计内容. 相似文献
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采用液压传动具有许多优点 ,因此液压传动在船舶上的应用越来越广泛。但是液压管路在船舶上使用时往往有爆裂、噪声、漏油及阀件损坏等现象产生 ,从而影响船舶的正常运行。本文从理论上分析产生这些故障的原因 ,通过实践找出防止和解决的方法。 相似文献
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CNG船舶运输新技术应用研究 总被引:1,自引:1,他引:1
针对当前国际能源市场的发展态势,本文对呼声最高的石油替代产品-天然气的最新运输技术进行了深入分析.通过与液化天然气(LNG)等运输方式的比较,指出由于压缩天然气(CNG)运输成本低、安全便捷的突出特点,CNG船舶运输必将成为天然气中、小储量运输和短距离海上运输的最佳运输方式。 相似文献
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Tiago A. Santos 《Maritime Policy and Management》2017,44(7):859-881
A novel methodology is developed for determining the characteristics of a cargo roll-on/roll-off (ro-ro) ship and the fleet size required for a given short sea shipping route. The ship and required fleet size to satisfy the transportation demand (for each pair of speed and freight rate) are determined using a database of existing cargo ro-ro ships to obtain the main technical characteristics of the most suitable ship. The time charter, voyage costs and revenue are then calculated considering the technical characteristics of each ship. Fuel costs are corrected for the actual ship speed and loading condition. A number of restrictions in the transportation problem are considered leading to the exclusion of unfeasible solutions. The maximum profit over the period of a year is identified among the feasible pairs of speed and freight rate. This general methodology is applied in a case study that considers the route between Leixões (Portugal) and Rotterdam (Netherlands). The study allows the identification of the most suitable ship and fleet sizes for different market penetration levels and quantifies the impact on shipping company profit of changes in parameters such as fuel costs, time charter costs, emission control area, installed propulsion power and stacking factor. 相似文献
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随着世界经济的稳步发展,对石油的需求也在不断增加,而大部分的石油都是通过海上运输的,因此,国际油运市场备受关注。介绍了国际油运市场的现状,提出了影响国际油运市场的主要因素,其中包括国际经济形势、国际石油消费需求和运力,并阐述了三者与国际油运市场走势的关系,在此基础之上,展望了未来的国际油运市场发展趋势,并着重对未来市场的运力发展趋势进行了分析。 相似文献
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论文根据作业成本法的特点,对其在远洋集装箱运输企业应用的适用性作出探讨,并列出了远洋集装箱运输企业作业成本的计算过程。 相似文献
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加强航运公司安全管理体系运行的现场管理 总被引:1,自引:0,他引:1
文中从建立制度、加强执法人员培训、加强主管机关联系、克服习惯做法、加强现场监督、开展大检查等几个方面阐述加强航运公司安全管理体系运行的现场监督管理工作。 相似文献
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ABSTRACTThis study uses a meta-frontier function approach to estimate operational efficiency and technology gaps for shipping companies. Researchers have evaluated the relative efficiency of shipping firms with the assumption that shipping firms operate under one frontier technology. However, the assumption of one frontier technology is being argued by efficiency literature. Therefore, this study estimates relative efficiency of shipping firms in different market segments (dry bulk, liquid bulk, and containerized cargo), possibly operating with different technologies and, hence, under different frontiers. This study uses a meta-frontier function approach that allows us to distinguish separate frontiers for different groups and decompose efficiency scores relative to the meta-frontier. Data used in this study is collected from Thomson One Banker from 2001-2013 in the form of unbalanced panel data. Empirical results suggest that dry bulk firms’ production technology is more advanced than others and the production frontier is the closest to that of the meta-frontier. In addition, efficiency scores are all low, but containerized cargo firms achieve higher technological efficiency than the other two groups. It is also suggested that containerized cargo and liquid bulk firms should prioritize improvements in their production technology and dry bulk firms should prioritize improving group efficiency. 相似文献
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分析中小型航运企业信息化现状,介绍SaaS(即软件及服务)技术,说明了其高实时性、高适用性以及低成本性等特点,进而提出“基于SaaS模式的物流信息平台”解决方案.在物流平台中应用SaaS技术,能够实现为中小型企业提供物流应用服务的安全性、适用性和按需提供服务的匹配性,通过同构实例的应用搭建了物流信息公共平台,实现中小型航运企业的高效信息化管理. 相似文献
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Lu Xinying Wu Yue 《中国水运》2006,(10)
随着中国加入WTO,市场的不断开放,外资航运巨头加速了在中国的扩张,这给中国的航运企业很大压力和挑战,本文剖析了外资航运巨头进入中国航运市场的现状,从而提出我国航运企业的应对之策。 相似文献
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分析人民币升值对航运市场及国际航运企业财务状况、经营竞争力的影响,认为人民币升值使国际航运企业航运收入减少,航运成本增加,经营竞争力下降,并提出相应对策。 相似文献