通过主成分分析研究比较港口物流发展趋势——以广州港为例

通过主成分分析法可以评价一个港口的综合物流发展水平和潜力。以广州港为例,建立了展示其综合发展的数学模型,同时选择邻近的深圳港进行对比分析。结果表明广州港的货物吞吐量短期内难以与深圳港匹敌,但其广阔的腹地物流支持和经济发展潜力使其整体竞争力快速上升。对广州港集装箱以及运输系统的直接货源腹地--珠江三角洲地区也作了详细分析,并且用最新的竞争情报分析阐述了其在发展过程中所遇到的问题和挑战。最后探讨了通过加强广州港集装箱运输系统的建设,配合公路、铁路以及内陆水系的配套设施以发展整体的第3方港口物流,从港口物流规划的高度综合展望了广州港未来的发展策略。     

基于Petri网的虚拟维修手部动素建模

针对虚拟维修仿真中手部动作仿真难度大、不容易控制的问题,提出基于Petri网手部维修动素模型,将虚拟维修手部动作根据维修操作封装为若干动素单元的组合,降低了仿真计算的难度,从而提高手部动作控制的精确性,以螺栓拆卸的手部动作建模过程为例进行验证。     

Investigations of vehicle securing without lashings for Ro-Ro ships

To reduce the area on deck occupied by each car and the labour and time required for lashing and unlashing cars, it has been proposed by the author that in some conditions, cars on decks could be transported without lashing. To evaluate cargo securing based on this “lashing-free” concept, computational code was developed to calculate the vehicle–deck interactions for various ship motions. The code was structured by incorporating a vehicle model into a piece of ship motion calculation code. A series of time-domain simulations were conducted to evaluate vehicle securing. It was found that for a target ship consisting of a 6000-unit Ro-Ro vessel, vehicle securing is mainly influenced by the ship's rolling motions and is highly dependent on the wave height and loading conditions. It was suggested from the analysis that vehicles could be secured without being lashed in a large area of the ship in specific weather conditions and on some routes with less adverse sea states. However, it is still suggested that conventional lashing holes should be constructed on the deck because in severe sea states the cars will still need to be lashed. The limitations of the current investigations are also presented. The relevant research work was carried out at the Division of Ship Design and Engineering, Department of Shipping and Marine Technology, Chalmers University of Technology.     

我国粮食物流园区运作研究

随着粮食物流业的发展,粮食物流园区的地位和作用也日益受到重视。如何做好具有现代物流和供应链管理理念的粮食物流园区运作,已成为关注的焦点。本文分析了我国粮食物流园区建设的必要性和可行性、发展现状及存在的问题,并在此基础上提出了我国粮食物流园区运作的几点建议。     

海岸河口多功能数学模型软件包TK-2D研究与应用

海岸河口多功能数学模型软件包TK-2D是交通部天津水运工程科学研究所在近30年海岸河口数学模型研究技术和经验积累的基础上,通过对海岸河口数学模型进行判断的改进完善推出的海岸河口多功能“五场”品牌化数学模型软件,是国内水运工程行业第一个拥有自主知识产权的国产行业品牌软件。文中主要对TK-2D进行了简介,包括TK-2D主模块、辅助模块、网格处理技术、重要系数和参数及重要工程应用。     

The place of the ISPS Code in the legal international regime

The adoption of the International Ship and Port Facility Security Code (ISPS Code) is the latest response of the international shipping community to the increasing threat posed by acts of terrorism at sea. The ACHILLE LAURO incident of 1985 showed that the traditional law against piracy was not adequate to deal with new types of unlawful acts against international shipping, especially those involving acts of terrorism. The 1988 Convention for the Suppression of Unlawful Acts against the Safety of Maritime Navigation (SUA Convention) and the technical and administrative measures adopted by the Maritime Safety Committee of IMO in 1986 and 1996 attempted to develop a broader regime to deal with unlawful acts against international shipping.However, the events of September 11, 2001 showed that additional measures were still needed to prevent terrorist attacks against ships.     

From privilege to peril

This article addresses the growing concern over the diminishing legal rights and increasing responsibilities of those in command of ships today. A number of high-profile maritime accidents have focussed on the dilemma faced by shipmasters who appear to be held responsible for actions over which they have little or no control. This seems to indicate that the traditional privilege and honour associated with command appears to have become a risky burden. The article discusses the legal rights and responsibilities that shipmasters have today in terms of international maritime law and policy. Four case studies are utilized to illustrate the problem.     

船舶登记审查形式的探讨

船舶登记就是对船舶享有某种权利的人，向国家授权的船舶登记机关提出申请并提交相应的文件，经船舶登记机关审查，对符合法定条件的予以注册，并以国家的名义签发相应证书的法律事实。     

核电站应急发电用16V240ZDA型柴油机结构及特殊性能试验

１６Ｖ２４０ＺＤＡ型柴油机是为我国秦山核电站设计的应急发电用柴油机。该型柴油机是在２４０／２７５Ｚ系列柴油机的基础上加装改造研制而成的。本文介绍了１６Ｖ２４０ＺＤＡ型应急发电用柴油机的技术参数，特殊性能参数，设计结构特点和该柴油机用作核电站应急发电而在台架上所进行的扭振测量，机油耗量测量，调速器的非直线度和不灵敏度，转速波动率，单双脉冲突加载荷，无燃油输送泵的快速启动，冷机启动，增压器旁通线路，热     

Fault Diagnosing System of Steam Generator for Nuclear Power Plant Based on Fuzzy Neural Networks

All kinds of reasons are analysed in theory and a fault repository combined with local expert experiences is establishedaccording to the structure and the operation characteristic of steam generator in this paper. At the same time, Kohonen algo-rithm is used for fault diagnoses system based on fuzzy neural networks. Fuzzy arithmetic is inducted into neural networks tosolve uncertain diagnosis induced by uncertain knowledge. According to its self-association in the course of default diagnosis. thesystem is provided with non-supervise, self-organizing, self-learning, and has strong cluster ability and fast cluster velocity.