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1.
Transportation provides vital support to the economic and social development of Latin America cities, but current growth patterns and trends are not sustainable. While non-motorized and public transport modes have the largest shares in passenger transport, there is a strong increase in ownership and use of cars and motorcycles. In Latin America in 2010 there were 2.5 new motor vehicle registrations for every new child being born.  相似文献   

2.
根据海上巡逻搜救任务对巡逻救助飞机在安全系数、操作性能、搜救能力、适应程度等方面的要求,论证了采用专业飞机执行海上巡逻救助任务的必要性;通过巡逻搜救飞机和船舶在应急反应时间、搜寻范围、救助能力以及成本费用对比,提出了巡逻搜救飞机的适用条件和船机配合执行任务的模式;通过对巡逻搜救飞机和机场自建-自用、建设-托管、租赁-使用三种模式的优缺点和费用的分析,提出了巡逻搜救飞机的机场建设的管理模式。  相似文献   

3.
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.  相似文献   

4.
通过大量的调查统计,量化分析了长江水运物流相对其他运输方式在节能、节地、环保、安全、成本等方面的比较优势,以及吸引产业聚集、与区域和城市的联动作用;在计算长江水运物流直接、间接经济和就业贡献等投入产出指标的基础上,分析了地区、部门和各项指标间的经济关系。  相似文献   

5.
李彩其 《中国水运》2007,7(6):218-219
收益管理作为一项先进的管理技术,在国际货运代理业尚未得到充分应用。现以国际货运代理业中最重要的业务之一——国际集装箱运输代理业务为例,探讨国际货运代理业可否实行收益管理,并从可行性、必要性和紧迫性等三个方面,进行较为详细的分析和论述,得出国际货运代理业开展收益管理不仅是可行的,而且是十分必要的,同时也是急待实施的结论,从而为国际货运代理业实施收益管理提供理论支持。  相似文献   

6.
The problem of wave scattering by undulating bed topography in a two-layer ocean is investigated on the basis of linear theory. In a two-layer fluid with the upper layer having a free surface, there exist two modes of waves propagating at both the free surface of the upper layer and the interface between the two layers. Due to a wave train of a particular mode incident on an obstacle which is bottom-standing on the lower layer, reflected and transmitted waves of both modes are created by the obstacle. For small undulations on the bottom of the lower layer, a perturbation method is employed to obtain first-order reflection and transmission coefficients of both modes for incident wave trains of again both modes in terms of integrals involving the bed-shape function. For sinusoidal undulations, numerical results are presented graphically to illustrate the energy transfer between the waves of different modes by the undulating bed. U. BASU was born in 1949. She is a professor in the Department Applied Mathematics, Calcutta University, India. Her current research interests include water wave problems, continuum mechanics, etc.  相似文献   

7.
张洪达 《船舶》2013,24(2):1-6
多体船与同吨位单体船相比,前者可获得单位面积排水量时更大的甲板面积、良好的横稳性、优良的抗沉性和适航性。高速水运相对于其他运输方式而言,具有装载量大、营运成本低、初始投资少等显著优势。文中以某型具有特定滚装功能(可携带冷藏集装箱、汽车等)的三体客货运输船为例,详细介绍其主要技术参数、设计方案、材料和动力装置的选取情况,总结了三体船的受力特点,对同类型船设计中危险工况确定的强度分析和结构优化具有一定的指导意义。  相似文献   

8.
为了应对快速城镇化发展中的城市交通问题,城市新型交通工具发展迅速。文中综述了国内外11种新型交通工具的关键技术和特性,包括城市轨道交通、地面交通及航空交通,考察新型交通工具在公路、铁路、航空等不同模式下的具体应用,并从资源环境约束、技术经济性能、系统服务性能、产业发展潜力等方面讨论新型交通工具的发展态势。提出多模式一体化综合交通系统发展的关键特征在于共享、畅达、绿色、公平。  相似文献   

9.
Considering the present trends of urbanization and motorization in India, there is an urgent need for integration, revitalization and renewal of the smaller towns and cities to make urban areas in India more sustainable. Unless our regional space is reorganized to upgrade development of towns and cities and integrate them with each other and the larger cities, the urbanization process in India will become unsustainable. It is argued that High Speed Rail (HSR) can play a role in achieving this more balanced and sustainable development of towns and cities, opening up opportunities for growth across a wider, inter-connected, region, with the benefit of taking the pressure of the larger cities to absorb additional burgeoning populations. This paper will make the case that in the current Indian context, current patterns of mega-city growth are unsustainable, and that HSR can play an important role in providing opportunities for medium and smaller size cities through their interconnections. It begins by highlighting the role that railways have played in India and other countries, noting that merely economic analysis of their costs and benefits generally underestimated their contributions to development. It then provides an introduction to HSR and its potential impact in general, before applying this to the example of the State of Karnataka in South India.  相似文献   

10.
曾艳  宗蓓华 《中国航海》2006,(4):92-95,104
集装箱多式联运系统是一个由多种运输方式构成,每种运输方式又自成体系的复杂系统。采用系统科学的方法,分析了集装箱多式联运系统的结构和协同学特征,并运用协同学理论,构建了以系统综合运输能力为序参量的国际集装箱多式联运协同发展方程。研究表明,随着控制变量逐渐变化,系统的定常态从稳定点变为不稳定点,系统发生结构变化。  相似文献   

11.
航运业作为物流过程中的中心环节,顺应国际环境乃是大势所趋。我国航运企业发展综合物流服务,也属必然。通过对我国航运企业的现状分析,研究了其开展综合物流的必要性和可行性,提出了相应的总体战略和具体措施,为企业加快发展综合物流、增强市场竞争力提供了一个切实可行的操作方案。对我国航运企业发展综合物流有一定的指导和借鉴意义。  相似文献   

12.
建设合肥集装箱码头发展内河多式联运   总被引:1,自引:0,他引:1  
通过对合肥港腹地经济、集装箱运输现状、集装箱生成量、合肥-上海航线价格竞争力的分析,论述了合肥港开展集装箱运输的总体条件、集装箱码头建设的必要性和可行性,为合肥港开展集装箱内支线多式联运和集装箱码头的建设提供依据。  相似文献   

13.
常琳 《港口科技》2011,(9):38-41
天津港集团要建成世界一流企业,必须加强科技人员自主创新的培训。强调了要牢固树立"科技人员是天津港集团第一资源"意识。阐述了开展科技人员自主创新能力培训的必要性。提出了建设和完善天津港集团科技人员培训体系的一些做法。  相似文献   

14.
加强检测设备计量检定 确保水运工程建设质量   总被引:1,自引:0,他引:1  
通过介绍中国当前水运工程检测设备计量检定的现状,指出检测设备计量检定的必要性及重要性;通过两年多的专项研究工作,科研人员得出需编写检测设备的计量检定规程和组建计量检定中心来保证水运工程建设质量的结论。  相似文献   

15.
潘永良  朱泓 《港口科技》2010,(11):36-40
分析了宁波-舟山港南航道弯曲复杂、狭窄难行的安全风险。阐述了对超大型船舶实施护航拖轮监护的必要性和可行性。得出结论:采用护航拖轮对超大型船舶实施监护是一种安全高效的减少航行风险的措施。最后提出了对超大型船舶实施护航拖轮监护的初步方案。  相似文献   

16.
精准测量航标灯节奏光的有效光强,是航标灯技术管理的重要内容.概述了航标灯闪光有效光强检测的现状及其存在的问题,论述了航标灯在闪光状态下检测其有效光强的必要性,提出了在闪光状态下直接对航标灯闪光光强进行测量的方法,分析了所涉及的关键技术问题,逐一进行研究,并给出技术结论.这一方法对于提高我国航标灯闪光有效光强检测能力具有...  相似文献   

17.
湄洲湾具有丰富的深水岸线资源,具备建设煤炭储运基地的优良条件。文章阐述在莆田湄洲湾建设煤炭储运基地的重要意义和建设的必要性及可行性。  相似文献   

18.
陈明辉 《港口科技》2010,(11):25-29
简要介绍了吉林省水运基本情况。分析了吉林省港航管理中存在的主要问题。阐述了港航管理所面临的新形势和新机遇。最后提出了促进内河水运事业发展的相应对策。  相似文献   

19.
对外承包工程企业本土化经营策略   总被引:1,自引:0,他引:1  
对外工程承包对于促进我国国民经济的发展有着重要作用。文章针对对外承包工程企业本土化经营的发展背景(动因、必要性)、理论前提以及如何展开本土化经营等问题进行了分析,指出在经济全球化背景下,对外承包工程企业在国际化经营过程中,只有采取适应当地的本土化经营策略,才能发挥自身的优势和积累技术能力,获得持续发展,立于不败之地。  相似文献   

20.
ABSTRACT

In this paper, the research concentrates on the intermodal land transportation systems which link Antwerp and Rotterdam with a shared hinterland in the long and medium distance range. It uses a choice-based experiment which has been calibrated on the basis of real case studies to understand shipper’s choices between end-to-end chains. The stated choices reveal shippers’ preferences when needing to choose between two logistic pathways, which employ a similar multimodal composition of transport modes to bring the container from door-to-door, but which route the container differently through alternative maritime gateways. The study therefore touches upon the topic of port competition applying a value-driven supply chain approach. Despite narrow differences on the main performance criteria of the door-to-door chains, the empirical analysis proves that shippers are not loyal to one of the ports, but give preference to the lowest cost solution. Enhancing the frequency levels of the inland transportation solution is only at the benefit of the more costly chain. The findings reiterate the importance of intermodal land transport systems in the competition between load centres.  相似文献   

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