冰盖下两层流体水波与可渗透起伏海床的作用(英文)

The scattering problem involving water waves by small undulation on the porous ocean-bed in a two-layer fluid,is investigated within the framework of the two-dimensional linear water wave theory where the upper layer is covered by a thin uniform sheet of ice modeled as a thin elastic plate.In such a two-layer fluid there exist waves with two different modes,one with a lower wave number propagate along the ice-cover whilst those with a higher wave number propagate along the interface.An incident wave of a particular wave number gets reflected and transmitted over the bottom undulation into waves of both modes.Perturbation analysis in conjunction with the Fourier transform technique is used to derive the first-order corrections of reflection and transmission coefficients for both the modes due to incident waves of two different modes.One special type of bottom topography is considered as an example to evaluate the related coefficients in detail.These coefficients are depicted in graphical forms to demonstrate the transformation of wave energy between the two modes and also to illustrate the effects of the ice sheet and the porosity of the undulating bed.     

厦门港叫板高雄港

近年来，受各种因素的影响，海峡东岸高雄港的国际集装箱中转港和世界大港地位受到挑战，尤其是来自西岸厦门港的威胁。本文从高雄和厦门两港的地理位置出发，对两港的港航条件、外部环境和吞吐量格局进行了比较分析。     

海一鸥游艇公司携日本洋马公司共拓中国市场

海一鸥游艇有限公司是代理销售国外知名船艇并提供相关服务及设施的专营公司.海一鸥游艇有限公司注册于上海,分别在北京、大连、青岛、深圳设有分公司,在广州设有分销商.     

2007IEEE机电一体化与自动化国际会议开幕

由国家自然科学基金、王宽诚基金、美国电气电子工程师学会(IEEE)和日本香川大学等资助,哈尔滨工程大学承办的"2007IEEE机电一体化及自动化国际会议"8月6日在哈尔滨市香格里拉饭店开幕.来自中、美、日、韩、加等27个国家和地区的500余名代表出席会议,其中有近200名国外代表,国防科工委副主任金壮龙,黑龙江省委常委、省科技厅厅长孙尧出席大会并致辞.会议共收到来自33个国家和地区的投稿论文1861篇.经过国内外专家的严格审阅和定稿,最终录用701篇,采用率不到37%.     

以科学发展观为指导打造长江黄金水道

学习贯彻十七大精神，对于动员拿党全国各族人民，存以胡锦涛同忠为总书记的党中央坚强领导下，高举中国特色社会主义伟大旗帜，奋力夺取全面建没小埭社会新胜利、圩创中国特色礼会主义事业新局而，具有重大现实意义和深远历史意义。长汀航道各级党组织要把组织学习和贯彻落实十七大精神作为当前和今后一个时期的首要政治任务，迅速把干部职工的思想和行动统一到全会精神上来，     

散货集装箱化的成因及发展趋势

0引言近年来全球集装箱运量的年增长率基本维持在10%以上,据初步统计2007年全球集装箱运量达1.3亿TEU,港口吞吐量达4.7亿TEU。随着集装箱制造、装卸工艺的改进,适箱货物的范围也在不断扩大。20世纪90年代,美国就开始采用集装箱运     

打造民族知名品牌的三一港口机械——访三一港口机械公司彭国成总经理

<正>众所周知,三一重工股份有限公司是一家享有盛誉的上市公司,曾连续4年上榜中国最具价值品牌,是工程机械行业内的标志性企业之一。作为中国最具科研实力的工程机械制造商,三一重工拥有国家级技术中心、博士后工作站,并承接有国家863课题,取得专利400多项。三一重     

关于美国水域对船舶驱逐和控制的探讨

美国海岸警备队港口长官(COTP)或口岸当局(OCMI)对存在缺陷的船舶,根据缺陷的严重性,决定对这些船舶采取控制行动来保证船舶、港口和环境的安全,至于控制的程度、范围以及当局的执行力则和这些缺陷的本性一致.     

FPSO global strength and hull optimization

Global strength is a significant item for floatingproduction storage and offloading （FPSO） design, and steel weightplays an important role in the building costs of FPSO. It is the maintask to consider and combine these two aspects by optimizing hulldimensions. There are many optional methods for the globalstrength analysis. A common method is to use the ABS FPSOEagle software to analyze the global strength including the rulecheck and direct strength analysis. And the same method can beadopted for the FPSO hull optimization by changing the depth.After calculation and optimization, the results are compared andanalyzed. The results can be used as a reference for the futuredesign or quotation purpose.     

深水起重铺管船横摇运动性能分析(英文)

For a large floating vessel in waves,radiation damping is not an accurate prediction of the degree of roll unlike other degrees of freedom motion.Therefore,to get the knowledge of roll motion performance of deepwater pipelay crane vessels and to keep the vessel working safety,the paper presents the relationship between a series of dimensionless roll damping coefficients and the roll response amplitude operator(RAO).By using two kinds of empirical data,the roll damping is estimated in the calculation flow.After getting the roll damping coefficient from the model test,a prediction of roll motion in regular waves is evaluated.According to the wave condition in the working region,short term statistics of roll motion are presented under different wave parameters.Moreover,the relationship between the maximal roll response level to peak spectral wave period and the roll damping coefficient is investigated.Results may provide some reference to design and improve this kind of vessel.     

Decentralized Coastal Zone Management in Malaysia and Indonesia: A Comparative Perspective 1

Transferring decision-making process from central to local government and enhancing the role of local communities in managing coastal zones is an increasing commitment by governments in Southeast Asia. This article analyzes decentralized coastal zone management in two neighboring countries, Malaysia and Indonesia. The Federal system in Malaysia is argued to be able to influence more decentralized coastal zone management and to promote community-based management approaches. Meanwhile, the large diversity of coastal resources and communities combined with a still as yet tested decentralization policy in Indonesia is argued to bring more challenges in implementing the decentralization and community-based approaches in coastal zones. The lessons learned in this study provide insight in how far decentralized coastal zone management has taken place in Malaysia and Indonesia. The significant differences in the pattern of coastal zone management in these two countries are discussed in detail. This study recognizes that co-management and community-based approaches can be appropriate in dealing with coastal zone management. This comparative perspective is important to the development of a bigger picture of sustainable coastal zone management processes and cross-regional knowledge-sharing in Southeast Asia.     

An analysis of trends in passenger and freight transport energy consumption in India

This primary objective of this paper is to examine the causes for the change in energy consumption in the transport sector in India. The pattern of energy consumption and their causes for change are benchmarked against select countries. A mathematical model that decomposes changes in energy consumption to various factors has been used. The changes in the energy consumption are attributed to growth in transport volume, structural change or modal shift, and energy intensity. The analysis is conducted for passenger and freight transport separately. Results indicate that the growth in transport volume has been the main cause for increase in energy consumption for both passenger and freight transport in India despite the decline in energy intensity of various transport modes. Though not surprising for a growing economy like India, this poses a challenge for the future. Currently, India is a low carbon economy.     

风浪中螺旋桨水动力变化的实用计算方法

风浪中螺旋桨水动力变化规律是研究舰船在风浪中速航性能的重要方面。本文参照有关文献,提出了一种计算风浪中螺旋桨推力、转矩损失的实用定量计算方法,既可用于较精确地估算舰船在风浪中的增阻和失速,还可供提高舰船在风浪中速航性的研究和螺旋桨设计参考。     

土工合成材料在堤坝工程中的应用

通过分析近年来土工合成材料在长江口深水航道、洋山港、太仓港、吕四港、宁波港、曹妃甸等具有代表性的堤坝工程中的应用情况,系统总结了土工合成材料在堤坝工程中的应用经验,可对同类工程有所借鉴.     

东亚港口集装箱运输发展前景

东亚地区正在建设或规划建设大量的集装箱码头,这是否适应本地区未来港口集装箱运输发展形势值得关注.介绍英国海运咨询有限公司的相关研究成果.     

港口集装箱起重机钢丝绳使用情况调查与分析

24个码头的 5 0 0多台集装箱起重机的钢丝绳使用情况表明 ,国内港口所用钢丝绳的品牌规格较多 ,其中日本产品和国内产品的市场占有率较高 ,国内产品的消耗量最大 ;进口产品的性能普遍较好 ,而国内产品则性能质量差异较大 ,除少数品牌外 ,使用寿命较短 ;各国内部品牌之间的价格接近 ,欧洲产品价格最高 ,国产品牌价格低廉     

ADCP在黄骅港水文测量中的应用

主要介绍了目前世界上先进的水文实时测量仪器ADCP在黄骅港水文系统的应用。概述在外业和内业方面的操作,测量精度的影响因素。     

航道护岸工程中基槽边坡稳定研究

航道护岸工程中经常发生基槽边坡滑坡失稳事故，从而造成经济和安全问题。因此，就滑坡发生机理进行研究对保障航道护岸工程顺利建设有重大意义。从极限平衡原理出发，分别运用Fellenius法和Bishop法验算了苏北某航道护岸工程开挖边坡的设计稳定性，并分析比较两种方法的差异，得出了在多层土的计算中有时会出现Fellenius法比Bishop法的安全系数略大的结论。结合工程实际中可能出现的渗流和超载等因素，计算得到边坡安全系数的变化规律和极限平衡状态时的临界负荷，从而提出了相应的预防渗流、控制超载等措施，可以为航道护岸建设提供参考。     

Exploring the effects of passenger rail franchising in Britain: Evidence from the first two rounds of franchising (1997-2008)

This paper provides an up-to-date review of the previous literature concerning the impact of passenger rail franchising on productivity and costs in Britain, and also presents important new evidence. In particular, the extension in time of previously-used datasets offers the first opportunity to study the impacts of re-franchising. The previous literature emphasised the failure of franchising to produce sustained productivity gains, with a sharp deterioration in productivity after 2000. The new evidence presented offers a somewhat more positive view of the British experience. It suggests that part of what was previously considered to be falling productivity may in fact be due to exogenous changes in diesel prices. Further, new data suggests that the recent increases in costs have resulted in higher quality of service. Finally, competitive re-franchising, and the associated unwinding of short-term management and re-negotiated contracts, seems to have led to improvements in productivity between 2006 and 2008. Nevertheless, it remains the case that passenger rail franchising in Britain has failed to reduce costs in the way experienced in many other industries and in rail in other European countries. The evidence is that somewhat larger franchises, avoiding overlapping and optimising train density and length, should reduce costs. We also speculate that the major increase in wages and conditions of staff might be moderated by longer franchises, although that remains to be proved. This re-appraisal of the British case is important in the context of the wider international interest in the use of franchising in passenger rail, and its relevance to the current review of ways of introducing competition into the domestic rail passenger market in Europe.     

危险货物集装箱水上运输风险与管理对策

随着海上运输方式的不断发展,集装箱运输以其安全、高效、便利、快捷的优点,赢得市场青睐。近年来,海运危险货物不断呈现出集装化和散装化趋势,集装箱运输的危险货物量越来越多,事故发生率在逐年增加。文中以现有的法律、法规和规范为依据,结合实际工作经验,阐述了危险货物集装箱水上运输的安全监管对策。