城市垃圾渗滤液处理方法探讨

本文介绍了垃圾渗滤液的来源和特点,结合近些年的工程实际和实验研究,主要综述了垃圾渗滤液的处理方法和技术。列举了国内垃圾渗滤液处理方面的典范。总结了一些处理技术的优劣,并提出了建议和展望。     

大数据在高速公路物流中的应用

本文主要探讨了大数据在高速公路物流中的应用。首先介绍了高速公路物流的背景和重要性,并指出了该领域存在的问题和挑战。随后对大数据技术进行了概述,包括其定义和特点,以及在其他领域的应用情况。接着详细讨论了大数据在高速公路物流中的应用,同时分析了大数据对高速公路物流的影响和优势,探讨了大数据应用所面临的挑战和限制。最后总结了大数据在高速公路物流中的潜力和前景,并提出了未来研究的建议。     

试论中国港口及上海港的物流业发展

介绍了中国物流业的发展和趋势,着重分析了上海港物流发展的优势和劣势,机遇和挑战,提出了相应对策。并探讨了我国港口与物流如何谋求共同发展。     

场桥确保安全控制装置改造方案

为了提高场桥操作和检查维修的安全性,建立了一个可移动式手柄控制系统。介绍了技术改造的方案。阐述了可移动式手柄控制系统的原理。介绍了操作方法和注意事项。这项目取得了良好效果。     

基于GPRS技术的远程船舶机舱监控系统的设计

本文提出了一种基于无线网络的远程船舶机舱监控及故障诊断系统的设计方法和思路。详细介绍了船舶机舱监控系统的总体结构以及软硬件组成,给出了基于粗糙集的逻辑故障树诊断方法和流程。本系统实现了对船舶运行状态的远程监控和故障诊断,大大提高了船舶航行的安全性和自动化水平,降低了系统成本,提高资源的利用率。     

基于OpenGL的雷达显示器仿真

雷达显示器仿真是雷达系统仿真的重点和难点。在简要介绍OpenGL技术和雷达显示器的基础上,提出了利用OpenGL对P型雷达显示器进行仿真的思想,详细介绍了余辉扫描和目标点迹的仿真方法。对于余辉扫描,通过数学建模提出了实现途径,并得出了时间衰减常数和扫描周期的计算公式。对于目标点迹,提出了角度换算和目标位置的计算公式,并实现了点迹的余辉效果。结果表明,该方法达到了很好的仿真效果。     

印度尼西亚ADIPALA海岸水文与泥沙条件分析

印度尼西亚南岸水文泥沙条件恶劣复杂。结合现场测量和资料收集,分析了ADIPALA工程海区的潮汐和潮流特征。运用一年的波浪实测资料和长期的气象资料,分析计算了波浪的年分布和不同重现期的波浪要素。结合周边河流、工程环境,分析了泥沙来源与运动特征。为工程研究、设计和建设提供了依据。     

港口危险化学品现场安全管理

港口危险化学品现场安全管理是港口安全管理工作的重点。分析了港口危险品管理现状和事故发生的原因,提出了相应的对策和办法。详细阐述了完善安全生产准入制度和强化管理、强化控制的具体做法。完成了由传统安全管理向现代安全管理的跨越。     

万寨港块煤装船新工艺的应用

为了提高万寨港块煤装卸质量和工作效率,提出了新的块煤装船工艺。分析了港口块煤装船的现状及存在的问题,介绍了块煤装船新工艺方案和具体操作办法。并介绍了解决难点和使用效果,可供借鉴。     

FPGA技术在能谱探头测试系统中的应用

介绍了一种基于自然伽玛能谱电路和地面计算机系统部分功能的、用来检测能谱探头的辅助性检测系统。系统采用了FPGA芯片和集成USB功能的单片机来设计和实现。文中详细叙述了系统原理和FPGA内部逻辑。     

Impact of container chassis management practices in the United States on terminal operational efficiency: An operations and mitigation policy analysis

Existing policies designed to mitigate the environmental and social impacts of truck queuing at maritime terminals often focus on congestion problems outside of the terminal gate, targeting a reduction in the waiting and turn time of trucks as the measure of success. This paper evaluates the impact that intra-terminal truck and equipment movements have on the terminal’s overall performance and the implications that these movements have on the effectiveness of current mitigation policies. Through a simulation of terminal processes occurring at Southern California ports it is shown that measures driving reductions in truck turn times impose greater operational loads on terminal equipment, essentially transferring savings in truck turn time rather than eliminating it in terms of the overall system. Consequently, the paper finds that total truck and cargo handling equipment movement and operational time constitutes a more accurate measure of the effectiveness of policies seeking to mitigate the impacts of truck operations at marine terminals.     

双垂直线路桥大型箱梁运输施工技术

为满足施工需要,根据现场实际情况对两种施工方案进行比对分析,选择了小半径大角度转弯运输箱梁的方案。通过对传统轮胎式运梁小车改进,特制出五轴轮胎式运梁小车。采用该运梁小车成功解决了大吨位大跨度大型箱梁在小转弯半径上实现大角度转弯的技术难题。结果表明,特制五轴轮胎式运梁小车是解决狭小施工场地内大角度运梁的有效方法。     

码头集卡运输线路的模型研究及设计

集装箱码头的集卡调度优化问题已经应用到生产领域，但其中有一个重要的问题就是集卡运输线路的选择还相对研究较少。运用了线性规划的RVP模型设计了一个算法，并在模拟程序中进行实现，效果较好。计划在新的集装箱码头管理系统中将该模型融合进去。     

基于PB语言的自动称量管理系统

电子汽车衡是目前港口普遍使用的一种称重仪器,讲述了基于PB语言的汽车衡自动称量管理系统。介绍了新系统硬件组成、软件方案和系统功能。该系统增强了汽车衡管理的自动化程度,提高了称重的可靠性和准确性。     

Application of El Farol model for managing marine terminal gate congestion

Truck queuing at marine terminal gates has long been recognized as a source of emissions problem due to the large number of trucks idling. For this reason, there is a great deal of interest among the different stakeholders to lessen the severity of the problem. An approach being experimented by some terminals to reduce truck queuing at the terminal is to provide live views of their gates via webcams. An assumption made by the terminals in this method is that truck dispatchers and drivers will make rational decisions regarding their departure times such that there will be less fluctuations in truck arrivals at the terminal based on the live information. However, it is clear that if dispatchers send trucks to the terminal whenever the truck queues are short and not send trucks when the truck queues are long, it could lead to a perpetual whip lash effect. This study explores the predictive strategies that need to be made by the various dispatchers to achieve the desired effects (i.e. steady arrival of trucks and hence less queuing at the seaport terminal gates). This problem is studied with the use of an agent-based simulation model and the solution to the well known El Farol Bar problem. Results demonstrate that truck depots can manage (without any collaboration with one another) to minimize congestion at seaport terminal gates by using the provided real-time gate congestion information and some simple logics for estimating the expected truck wait time.     

Implementing the street-turn strategy by an optimization model

The street-turn option represents a major strategy for the profitability of shipping companies supplying container-based transportation. This option consists in the distribution of trucks delivering loaded containers to import customers, the subsequent allocation of empty containers to export customers and the final dispatch of loaded containers to departure ports. However, the determination of truck routes is a time-consuming activity for shipping companies, because available information can suddenly change while they are making their decisions. In this paper we aim to propose a decision support tool to quickly determine truck routes and implement the street-turn strategy. This tool is based on an optimization model determining the allocation of empty containers between customers and defining truck routes in a post-optimization phase. We compare routes resulting from the proposed model to the decisions of a real shipping company. Early results indicate that this approach represents a promising support for shipping companies in dealing with street-turns. It can significantly reduce distances travelled by trucks and times requested to determine routes.     

重型汽车下河斜坡码头合理纵坡研究

从车、船两方面因素对重型汽车下河斜坡码头合理坡度进行研究。以常见重型自卸汽车及一般内河船型为研究对象,重点分析汽车爬坡能力、下坡能力及码头前沿设计水深对坡度的约束。结果表明,码头斜坡道合理的坡度范围约在5.5%～9%,且汽车总质量越大,船舶吃水越深,下河斜坡道坡度可选择的范围就越小,甚至趋于一个定值;同时斜坡坡长不宜超过150 m,且车速宜控制在10 km/h以内。     

集卡调度方式对集装箱港区碳排放的影响

集卡已成为集装箱港区内的主要碳排放源,尤其两艘大型集装箱船舶同时作业时,港区内集卡碳排放问题严重。针对该情况下集卡调度模式的特征,基于智能体仿真技术构建集装箱码头生产作业微观仿真模型,定量分析传统先卸后装、双船一装一卸、同贝同步装卸工艺下集卡调度方式与集卡配置数量对船舶在港时间、集卡碳排放量的影响。实例表明,采用同贝同步装卸作业方案可保证装卸效率,并有效减少集卡碳排放,而集卡配置数量只对集卡怠速行驶产生的碳排产生影响。     

移动大型钢结构物的模块平板运输车对码头强夯地基的影响

近几年,在国内大型海洋工程结构物建造过程中,已逐步利用模块平板运输车来移动大型钢结构物.该技术具有操作简单、工作效率高、移动速度快和环境要求低等优点,但在大型结构物的移动过程中,模块平板运输车可能导致地基沉陷甚至破坏.结合国际镍矿项目大型结构物的移位过程,重点分析码头强夯地基的特性、模块平板运输车的结构及液压控制系统的...     

治超、计重收费对车辆载荷影响探讨

探讨了超载带来的严重后果,分析了治超和计重收费对车型的影响,得出治超和计重收费能明显减少车辆超载的结论。