终端区空域结构调整对进场交通流的影响

根据终端区空域运行规则, 采用网络理论建立了终端区空域网络模型, 基于终端区航空器微观行为建立了空中交通流跟驰模型和等待模型, 基于NetLogo仿真平台进行了仿真试验, 分析了不同入度分布的空域结构对交通流的影响。仿真结果表明: 当密度小于等于0.075架次·km^-1, 速度大于等于0.04 km·s^-1时, 交通流处于自由相; 当密度为0.075~0.200架次·km-1且速度大于等于0.04 km·s^-1时, 交通流处于畅行相; 当密度大于0.200架次·km^-1, 小于最大密度时, 交通流处于拥塞相; 随着航班波作用的减弱, 交通流进入反向畅行相, 之后进入反向自由相; 当进场交通流分布一定, 入度值依次为2、3、1时, 交通流速度小, 密度大, 拥塞消散最慢, 入度值依次为3、2、1时, 交通流速度大, 密度小, 拥塞消散最快。可知, 增大空域网络上游关键节点的入度, 使进场交通流提前完成汇聚, 有利于交通流快速运行, 增大交通流量; 减小空域网络下游关键节点的入度, 有利于交通流在达到拥塞相后快速完成消散。     

大型集装箱码头陆域布局优化

为解决宁波大榭招商国际集装箱码头现有陆域布局散乱、 土地利用不充分、 堆场容量不足的问题,对码头陆域布局进行优化研究,以期集约化利用土地,增强码头的竞争力和发展潜力.基于调研和分析,梳理当前陆域布局中存在的主要问题;对泊位通过能力和堆场容量的计算分析,合理确定码头总体的运量规模,并以此指导陆域布局调整和优化工作.从土地...     

基于供应链的现代集装箱码头管理

在全球供应链下,作为国际物流重要节点的集装箱码头也面临着激烈的竞争和挑战。在此情形下,以集装箱码头为中心,整合国际海运物流渠道,构建集成化的集装箱码头供应链,将现代供应链管理的思想应用到集装箱码头生产营销中,无疑是集装箱码头走出当前困境、提升自身竞争力的关键。     

集装箱码头规划设计的计算机模拟

在改扩建集装箱码头工程规划设计过程中, 建立了计算机动画模拟模型, 并进行了一系列的模型试验。结果发现, 码头极限年通过能力为1 5×10⁶TEU, 制约因素是堆场容量, 适当增加拖挂车数量有助于提高船舶装卸作业效率, 以临海路集装箱堆场为进口箱补充堆场, 码头和补充堆场统一协调运作, 年通过能力可以因此提高到2 0×10⁶TEU。应用结果表明该模型是可行的。     

天津港典型LNG码头海洋环境风险研究

文章针对天津港特殊的地理位置,周边敏感资源的特点,对天津港典型LNG码头的运输货种及燃料油的污染危害性进行了分析,对码头及船舶存在的风险进行了研究。运用Oilmap溢油轨迹和归宿模型,采用情景分析法假定溢油事故场景,对燃料油泄漏事故进行了模拟。根据研究结果,对天津LNG码头提出了风险的防范措施以及建议。     

Competitiveness of container terminal operating companies in South Korea and the industry–university–government network

Burgeoning container port facilities have fostered intensified competition among container terminal operating companies (CTOCs). However, despite research into their survival strategies which identified antecedents of competitiveness including hard factors such as facilities, available cargo and cargo processing ability, softer factors spanning human resource management, networks and strategic alliances with universities and government agencies in industry–university–government (I–U–G) networks have been overlooked. This study aims to examine both hard and softer antecedents of competitiveness as perceived by 152 professionals in South Korean CTOCs; empirical relationships among these antecedents, I–U–G networks, and competitiveness itself; and the significance of the I–U–G network in establishing and improving competitiveness. Posited antecedents of competitiveness included human resources, facilities, service quality, customer orientation, reputation, and government support policy as independent variables; the I–U–G network as a moderating variable; and competitiveness as a dependent variable. Empirical structural relationships revealed that excepting government support policy, each variable significantly affected CTOC competitiveness. Further, the I–U–G network moderated the relationships between the antecedents of competitiveness and competitiveness. Because an effective I–U–G network was pivotal in controlling CTOC competitiveness, improved competitiveness requires not only differentiation of human resources, facilities, service quality, customer orientation, and reputation factors but also I–U–G network developments.     

Effects of passenger characteristics and terminal layout on airport retail revenue: an agent-based simulation approach

This paper examines the effect of passenger characteristics and terminal layout on airport retail revenue using an agent-based simulation approach. Simulation results show that passenger mix (that is, the mix of shopper types according to a typology of airport shoppers) has a profound effect on airport retail revenue; the larger the number of ‘shopping lovers’ there are among passengers, the higher the airport retail revenue. Results also reveal that group travel can lead to negative effects on retail in certain terminal layouts, and that the amount of free dwell time that a passenger has can affect spending due to less retail engagement. This paper shows a combined effect of passenger characteristics and terminal layout on airport retail revenue, and discusses the implications of these results for future airport terminal design that aims to maximise retail potential.     

铁路枢纽小运转列车径路优化

以枢纽小运转列车运营成本和货运站装卸费用最小为目标,考虑载重量、列车数和运行时间约束,建立了枢纽小运转列车路径优化模型.并以某铁路枢纽地区为例,运用ILOG CPLEX优化软件仿真求解,得出枢纽小运转列车的最优路径方案.实例证明模型是有效可行的,与实际运行比较,优化后的费用降低近5%,运输距离缩短近8.31%.     

埃及塞得东港超深T形地下连续墙施工关键技术

基于埃及塞得东港集装箱码头二期工程,研究分析超过60 m深T形地下连续墙在上软下硬且软弱土层深厚、临海水位高的复杂地层情况下的关键施工技术,包括地下连续墙成槽技术、防止槽壁坍塌技术、垂直度控制技术、钢筋笼的＂抬架垂直转体法＂吊装技术、热带沙漠高温下C50水下混凝土配制与灌注等关键技术。实践证明该施工技术适用于临海地区复杂土质的超深异形地下连续墙施工,施工工期相对较短,成本低,能够保证工程质量和施工安全。     

卸船作业模式下自动化码头AGV路径仿真优化

AGV作为自动化码头水平运输的设备,主要负责运输集装箱。受岸桥和场桥装卸能力、水平运输距离和集装箱作业量增加等因素影响,水平运输环节是制约自动化码头发展的瓶颈。结合港口码头作业实际,采用"模型+实例+仿真"的方法对自动化码头AGV路径优化问题进行研究。结合道路交通流理论,提出交通虚拟环岛策略以避免多AGV在码头行驶时产生冲突和拥堵。在卸船作业流程下,采用e M-Plant仿真软件,对提出的交通控制策略从不同角度进行仿真模拟。结果表明,AGV不同路径的选择影响着码头的作业效率。试验结果进一步提高码头作业效率,为自动化码头AGV路径优化提供参考依据。