客滚船集成进水探测自动化系统设计

针对需要满足安全返港(SRTP)的客滚船进水探测报警系统冗余性的问题,以某高端客滚船3 100 m车道进水探测系统为研究对象,首先以规范和规格书为最基本要求,构思了整个系统的功能;其次通过各系统的组成和接口建立设计了系统框架和原理;最后对设计中存在的问题进行了分析并提出解决方案。结果表明：通过进水探测报警系统与全船自动化(IAS)集成后,系统的冗余性、安全性、集成性大大提升,系统设备的费用大大降低,且满足了安全返港的规范要求。     

2800客邮轮型客滚船薄板分段工艺与应用

针对客滚船薄板分段制作过程中易变形,以及分段整体尺寸、甲板面平整度和壁板垂直度较难控问题,以2800客邮轮型客滚船居住舱室薄板分段为例,研究生产设计、材料订货及转运、施工工艺要点.实船建造表明:该工艺满足5～7 mm薄板立体分段的公差要求,提高了薄板分段质量,降低了建造成本.     

川江汽车滚装船建造质量堪忧

川江汽车滚装船是近年来万州水运市场的一个热点.在水运市场全面萧条的状况下,业内有识之士看准了进出川江汽车翻山越岭的艰辛,将半舱机驳船割除船首加装跳板装上汽车,千里川江一泻而下,陆路的天险顷刻转为水上通途.这种运输方式一出现,立即受到市场青睐.但在一哄而上的竞争中,大部分滚装船的建造质量令人堪忧.     

基于PIV的客滚船风阻流场研究

为准确分析客滚船在不同风向角下的流场分布,基于PIV技术研究了某型客滚船在25m/s风速下,5个不同风向角的风阻变化和流场分布;利用PIV技术得出某型客滚船纵向、横向以及水平方向的空气流场特性。结果表明:随着风向角的增加,纵向风轴阻力和横向侧向力呈"抛物线"规律变化,偏航力矩呈"正弦曲线"分布,并存在两个方向相反的阻力峰。利用PIV流场分布图与常规测力试验的风阻曲线对客滚船风阻流场进行分析研究,所得结果可为以后的CFD计算验证以及后期风阻优化提供参考依据。     

Marketing communications for seaports: a matter of survival and growth

Perhaps the most critical issue facing seaports is their survival and growth in today's highly competitive environment. Seaports are facing challenging times as the once monopolistic position of having captive markets diminishes. This situation is being replaced by growing sections of the hinterland now being considered by competing seaports as being contestable. In effect, for many business opportunities, captive and contestable hinterland regions are blurring resulting in attracting and retaining trade throughput becoming a major key to seaport survival and growth. One strategic tool that seaport management can utilize to both attract new customers and retain current customers is the use of marketing communications. An examination of the literature on marketing communication efforts by seaports tends to focus mainly on advertising and activities more suited to promoting physical products. Instead, this paper argues the need for a much broader approach to marketing communications that takes into account the challenges of seaports that are service-based businesses. That is, there tends to be a greater need for marketing communication efforts to be able to tangibilise the intangible service offered by seaports to reduce perceptions of increased risk and uncertainty on using another seaport. The purpose of this paper is to examine the benefits to seaports of managing marketing communications strategically and holistically for effective outcomes. More specifically, this paper explains the role of public relations, publicity, personnel selling, sales promotions, word-of-mouth communications, electronic communications, and the management of the seaport's servicescape and the sources of physical evidence provided by seaports in developing a broader and services-based approach to marketing communications. This includes thinking wider than attracting and retaining customers as being the purpose of marketing communications but to also include informing and educating other stakeholders such as employees and the local community about the benefits provided by the seaport. Also discussed is the necessity of a consistent message being provided by all marketing communication activities to customers and stakeholders that results in the development of a desired image of the seaport and appropriate positioning of the seaport in relation to competitors. To facilitate discussion, results from a recent empirical study of the Australian seaport sector are used.     

扭曲舵空泡观测实船试验研究

为验证扭曲舵的抗空化效果,在前期完成扭曲舵设计及实船换装工作的基础上,首次在国内开展了扭曲舵和普通舵的空化实船观测对比试验,对两种舵在设计航速和最大航速下固定舵角工况和直航自动舵工况的空泡进行了比较.结果表明:在相同航速工况下,扭曲舵的舵面空化起始舵角可提高10°左右,可以消除舰船常用航行状态下舵面的空化问题;在高航速大舵角工况时,扭曲舵的空化面积远小于常规舵;在扭曲舵优化的基础上,防腐蚀电极新型安装结构和舵下端导流罩可以有效解决防腐蚀电极和舵下端面的空化问题.通过扭曲舵空泡观测实船试验,证明了扭曲舵具有良好的抗空化性能,为抑制水面舰船舵空化剥蚀、降低船尾振动噪声提供了有效途径,具有优良的应用前景.     

实船舵空化现象试验观察

空化是高航速下水面舰船螺旋桨及舵等附体上常见的现象,空化的产生会带来振动、噪声和空蚀等一系列问题,直接影响舰船的舒适性和局部结构的安全性.而由于国内有关实尺度舵空化数据的缺乏,导致人们对于实船舵空化的状况仍知之甚少.本文通过试验方法观察了某一实船舵在一定航速、一定舵角下的空化状况,获得了实船舵空化出现的位置及程度,为实尺度舵空化问题的认识和优化提供了一定参考.     

Econometric estimation of scale and scope economies within the Port Sector: a review

Seaports provide multiple services to ships, cargo and passengers. The size of the port and type of service they offer are two key elements when deciding whether competition is feasible and how to promote it or, conversely, regulation is needed. Analysing this requires a profound knowledge of the cost structure of the activity involved. This means not only knowing total costs for different volumes of aggregated traffic, but also the behaviour of costs when part of the bundle is produced, i.e. when the mix changes. The optimal organization of the industry can be studied by means of cost and production functions. This paper offers a review of the relatively scarce literature about econometric ports' cost structure, and highlights the role of the multioutput approach as the correct one because it allows the calculation of key cost indicators (economies of scale, scope and so forth) to determine the optimal port industrial structure for a given forecast of demand (traffic mix and volume).     

The emergence of Vladivostok as a commercial port: US versus Japanese development

The Russian port of Vladivostok, closed to foreigners since before the Second World War, hsa been opened to foreign commerce by the government of the newly-created Russian Rupublic. Although the port faces many difficulties in establishing itself, many nations, Japn and the United States included, believe that Vladivostok will become a major centre to commerce between Russian and other Pacific nations. This article examine; (1) problems facing Vladivostok and the Russian Far Eatern Ports, (2) recent cargo throughputs and potential for growth, (3) investements by Japanese and United States corporations, (4) recent policy of the Japanese and United States governments regarding economic aid and cooperation with Russia. By analysing these data, it is possible to test the hypothesis that because of Japn' geographic advantage, its reliance on imports of raw materials that could easily be supplied by Russia,and its pre-eminence as an economic power in the region, Japnese corporation will become the major economic force in the development of the Russian Far East and the Port of Vladivostok in particular.     

交通部徐祖远副部长希望CCS抓机遇谋发展上台阶

2005年2月21日—23日，中国船级社2005年工作会议在广东省南海市召开，交通部徐祖远副部长在百忙之中亲临大会并发表重要讲话。在讲话中，徐副部长对CCS在过去一年里取得的成绩给予了充分肯定，并希望CCS在2005年再接再厉，争取更好的成绩，在实现争创国际一流船级社的目标上迈出实质性的一步。     

Measurements of a small scale eddy at a tidal inlet using an unmanned automated boat

An unmanned automated boat equipped with an acoustic Doppler current profiler was used in field surveys at a tidal inlet, the Southwest Pass of Vermillion Bay, Louisiana on Sept 6 and Oct 6, 2007. During the first survey, under calm weather conditions, a small scale eddy with a diameter of 300 m was discovered with strong upwelling and downwelling zones. A detailed analysis of this small eddy shows that the eddy's velocity field is relatively uniform in the vertical and the eddy is formed by a flow convergence, tidal velocity shear induced relative vorticity, and the interaction between the horizontal flows and bathymetry. The major upwelling area is where an uphill flow occurs while the major downwelling area is where a downhill flow occurs. The vorticity of this eddy is on the order of 0.013 s^? 1, which is two orders-of-magnitude larger than the planetary vorticity, and one-order-of magnitude larger than that in a typical tidal inlet without eddies. The Coriolis effect is thus insignificant and the generation of the eddy cannot be affected by the earth rotation. The maximum upwelling and downwelling velocities exceed 0.3 m/s. This high vertical velocity in a tidal inlet does not appear to have been reported before. The second survey, conducted under a thunder storm condition, did not reveal a similar eddy at the same location during roughly the same tidal phase. Though the measurements of 3-D flow structure under a thunder storm condition in a tidal channel does not appear to have been reported before, the second survey is of important value in providing support of the mechanism of the eddy formation during the first survey: the wind tends to produce downwind flow in shallow water than in deep water, producing a velocity shear counterproductive to the formation of the eddy. Therefore, the second survey under a thunder storm condition did not show an eddy. A scaling analysis of the non-hydrostatic flow shows that the uphill and downhill flows introduce a non-hydrostatic flow component proportional to the square of the bottom slope which leads to the conclusion that the non-hydrostatic flow component affects less than 10% of the vertical momentum balance.     

某型舰大范围割焊对轴系影响的探讨与应对措施

某型舰修理中,包括轴系在内的大型设备要全部出舱修理,为了修前及修后的出、回舱,舰体将进行大范围的切割及焊接,舰体不可避免地产生应力变形,并引起轴系相应变化。文章探讨的是舰体变形对轴系的影响与应对措施。     

鲸豚表皮微尺度柔性变形的减阻原理研究

鲸豚类海洋高速动物具有突出的低阻高效游动能力,一直是仿生学的重要研究对象.为了探索柔性表皮减阻的可行性,在参考国外关于活体齿鲸类海洋动物表皮观测结果的基础上,本文采用RANS方法和动网格技术建立了仿生表皮微尺度柔性变形的数值模拟方法.文中对不同柔性变形的仿生表皮,以及刚性波面、刚性平板开展了对比数值计算,详细对比了流场和阻力成分,并重点分析了减阻原理.研究表明,随行波柔性表皮在波速高到一定程度时可实现明显减阻.     

Coal-fixed turbines versus diesel: an Australian context

This paper considers the economics of the diesel engine as against that of coal-fired turbines for ship propulsion in the context of the world energy debate. After formulating a generalized model of propulsive plant choice the model is applied to a particular Australian export trade.     

1:2000比例尺地形图数字化缩编的实现

在实际工作中,常常需要把大比例尺AutoCAD数据格式的数字化地形图缩编为小比例尺地形图。本文通过对地形图符号的分析,结合天津港1:500比例尺地形图缩编为1:2 000比例尺地形图的实例及地形图图示说明缩编的主要原则和缩编过程。     

关于物流地理学的研究

物流地理学是一门新兴的学科,它是随着物流业的发展而产生和完善的,它是现代物流学的一个重要组成部分,也是经济地理学的一个重要组成部分.物流地理学的研究成果将为国家或地区物流体系构建提供理论和规划的依据.     

修船企业建造大型坞门的工艺探讨

文章阐述了修船企业如何利用修船设施和合理的建造方案,抓住建造中的工艺关键点,解决大型坞门制造过程中的工艺难题,用创新的方法和认真严谨的工作思维来确保各个工序的精度控制和大型坞门高质量的建造完成。     

保障海员权益不容忽视

21世纪是海洋的世纪,蓝色文明的世纪。作为海洋活动的重要参与者——海员,为全球经济的繁荣发展作出了重要贡献。然而,由于海员这个职业具有一定的风险性,其合法权益具有一定的职业特殊性,需要有特定的法律保护,保护海员的合法权益已成为推动海洋事业发展的关键环节。《2006海事劳工公约》的出台,为全世界海员提供了体面工作的人权法案,也为我国海员体制改革提供了法律保障。我国政府一贯重视海员合法权益的保障工作, 相继开展了海员相关立法,突出“以人为本”的理念,作了大量卓有成效的工作。     

芒稻船闸扩容改建工程规模研究

根据统计资料,分析了芒稻船闸的通航能力,预测了航道运量,并研究了船闸的建设规模,为决策提供依据.