滨海组团结构城市快速路布局与规模研究

城市空间格局、道路网络形态及交通需求特征等因素决定了城市快速路网布局和规模.大连市地处辽东半岛南端,呈明显的组团式城市格局且地势多山岭低丘,交通网络格局有别于内陆平原城市,交通方式多元化发展,此背景下城市快速交通地位凸显重要.综合一般性判定要素的同时,融入大连市特有的城市结构特征和多元化交通特点,提出“以形态定格局、以...     

浅谈客运专线客运管理信息系统工程设计

客运管理信息系统是高速及客运专线的重要组成部分，通过中心及车站两级组网，实现核心层数据采集、控制，并向各子系统提供服务。系统由通告显示类、安全监控类、时钟等系统组成。     

采用三维潮流模型分析人工岛对海湾污染物运动的影响

人工岛作为人工建造的海洋工程结构物,其嵌入必然对其附近水域的水动力特征造成影响。针对不同的人工岛建设预案,基于ECOMSED建立了大连湾海域的三维潮流模型,通过拉格朗日粒子追踪技术,采用单个粒子和粒子群模拟了大连湾水域污染物输运过程。对比分析了人工岛嵌入前后粒子运动的三维运动规律,最后从污染物扩散的角度为人工岛的规划以及排污口的布置给出推荐方案。     

Ship selection using a multiple-criteria synthesis approach

A method is presented for selecting a preferred ship from a group of candidates as a reference ship for a new design. The method is based on a recently developed approach for multiple-criteria decision analysis under uncertainty, the evidential reasoning approach. Using this method, both quantitative and qualitative attributes of a complicated nature can be considered in the selection process. The method consists of three phases: identifying suitable candidate ships, evaluating them in terms of both conventional techno-economical and qualitative attributes, and aggregating all the attributes using the evidential reasoning approach. This three-phase procedure is illustrated by means of an oil tanker selection example. The results of this study show that the evidential reasoning approach can support multiple-criteria ship selection processes when both qualitative and quantitative information with or without uncertainties have to be taken into account. The outcomes generated by the method include the ranking of the candidate ships and indications of their strengths and weaknesses in the format of performance distributions over different assessment grades. Such information is vital in helping decision makers to make an informed selection and be aware of any risk implication associated with the selection.     

CGCS2000及WGS84坐标系若干问题探讨及应对策略

详细介绍了CGCS2000和WGS84坐标系、1980年西安坐标系、1954年北京坐标系的定义、特点和用途以及相互之间的区别和联系,重点探讨了CGCS2000及WGS84坐标的获取方法、新旧坐标系统精确转换等问题,通过工程案例进行了进一步说明。     

p-CenterProblem的一个基于中心图合并操作的启发式算法

设计的启发式算法从图的合并操作出发, 降低了计算复杂度, 从应用效果看接近最优的程度也较以往算法好     

大连市快速轨道交通3号线调度集中系统实现方案

国产化的调度集中(CTC)系统,以其完善和可靠的性能在城市轨道交通领域得到广泛应用.针对大连市快速轨道交通3号线信号CTC系统工程实例,介绍了CTC系统的体系结构、设计原理、系统功能、系统特点等.在工程实施过程中,根据大连市城市轨道交通初期客流小的特点,CTC系统的设计尽量简约,既减少了投资,又提高了性能价格比;CTC系统设计采用模块化结构,便于中、远期系统扩容;核心部件采用冗余设计,以增加系统的可靠性;所有硬件均采用国产化设备,降低了用户的维修成本;软件设计可根据用户的需求,提供灵活的解决方案.     

发展中的铁路客户服务中心

对铁路客户服务中心的结构及最新关键技术进行介绍，从技术层面对应用中的客户服务中心的系统设计及功能进行论述，阐述了对客服系统如何进行运营管理，提高服务质量，并对铁路客户服务中心的前景进行了分析及建议。     

广西北部湾港口保税物流腹地经济圈构建研究

广西北部湾港口保税物流群的设立是我国为发展西部地带经济,推动中国-东盟自由贸易区而采取的重要举措。文章结合我国保税物流兴起的背景,介绍了广西北部湾港口保税物流业务分工内容及其对腹地经济区域的辐射作用,分析了广西北部湾港口保税物流腹地经济圈发展存在的问题,提出相应的发展思路和对策。     

Sailing into a dilemma: An economic and legal analysis of an EU trading scheme for maritime emissions

On the basis of a joint economic and legal analysis, we evaluate the effects of a “regional” (European) emission trading scheme aiming at reducing emissions of international shipping. The focus lies on the question which share of emissions from maritime transport activities to and from the EU can and should be included in such a system. Our findings suggest that the attempt to implement an EU maritime ETS runs into a dilemma. It is not possible to design a system that achieves emission reductions in a cost efficient manner and is compatible with international law.