对装运金属重货船舶的管理和思考

对装运金属块锭及板材的船舶发生事故进行原因分析,并提出物流业的发展给海事部门和港航单位带来了许多新课题。海事部门正在积极会同其它港航部门认真分析相关事故原因并积极采取措施,并力争通过加强现场管理将船舶在此类货物运输中的风险减小到最低程度。     

Sybase数据库性能调优与客票系统

调优客票系统数据库的性能很重要.在SQL Server级的调优,有管理内存、锁、多引擎、设备、临时库和事务方面的内容;在数据库设计级,可以适当创建索引,必要时采用降范式设计;对于应用级,要充分利用索引,书写高效查询语句.     

Throughput estimation based port development and management policies analysis

With the rapid growth of seaborne commodity trades, port development and management has become a challenging issue to the government, enterprise and academia. To alleviate pressures on spatial demand and the environment, sustainable development and scientific management of a port is of crucial importance for its investment, construction and operation. In this article, a research path based on throughput estimation is proposed. The container port of Tianjin could expect to face immense, increasing pressure in the future several years. To meet future increasing capacity requirement, constructing new waterway and berths in a bigger contiguous area or new locations becomes a crucial strategy. Moreover, the strategy of accommodating peak seasonal traffic means existing container terminals have to attain higher output by redesigning their high-precision schedule, reconfiguring terminal topology, improving worker efficiency and employing more modern container-handling facilities.     

不稳定散件货物的系固研究

在船舶运输中，解决不稳定散件货物系固的计算验证问题，对于船舶、人员、货物及环境的安全具有重要的现实意义．通过分析散件货物对支撑构件的作用情况，获得散件对支撑构件的作用力和弯矩，比较支撑构件受到的最大弯矩和许用弯矩，运用计算方法和面向对象的C#语言编程验证不稳定散件货物系固方案的合理性和安全性．     

Assessment of carbon emission costs for air cargo transportation

This study presents a set of models that calculate carbon emissions in individual phases of flight during air cargo transportation, investigates resultant carbon footprints by aircraft type and flight route, and estimates increases in transportation costs for airlines due to carbon taxes imposed by the EU ETS. The estimated results provide useful references for airlines in aircraft assignment on different routes and in aircraft selection for new purchases. Validation of the model is conducted by simulating the potential impact of the implementation of the EU ETS on costs of air cargo transportation for six routes and six types of aircraft. Results show that the impact may be subject to various factors including unit carbon emissions per aircraft, aviation emission allowances per airline, and carbon trading prices; and that increases in costs of air cargo transportation range from 0% to 5.27% per aircraft per route. Therefore, the implementation of the EU ETS may encourage airlines to cut down their operating costs by reducing their carbon emissions, thereby ameliorating greenhouse gas pollution caused by air cargo transportation.     

欧盟港口接收设施收费制度研究

船舶在正常的营运过程中会产生废弃物和货物残余物,这些大部分又是污染物。为了防止船舶造成海洋污染,MARPOL在对船舶结构、设备以及操作提出要求的同时,对港口提出了提供接收设施的要求。但由于多种原因,港口提供接收设施的履约存在许多问题,其中收费制度是影响港口提供充分适用的接收设施的主要问题之一。为了成员国履行MARPOL以及保护海洋环境,欧盟制定了接收设施指令（Directive2000／59／EC）。在该指令的框架下,欧盟内成员国建立了不同的港口接收设施收费制度。本文初步探讨了欧盟成员国港口接收设施主要的收费制度,为我国主管机关对港口接收设施管理制度的完善提供参考。     

Transportation of dangerous goods by road: the Brazilian case for selection of carriers based on a risk management methodology

Abstract

This article applies a methodology for selecting carriers for the transportation of dangerous goods by road, with a special focus on risk management aspects. The methodology makes use of Stated Preference techniques and verifies the most critical risk-related variables influencing decision-making from the shippers' point of view. It embraces the planning and execution stages, an evaluation of the contracted company and a feedback process. The methodology was effectively applied to the case of liquid fuel shippers in the Brazilian middle-west region where it proved possible to identify which dangerous goods road transport company to contract in accordance with the risk management factors selected by the decision makers.     

广州港货物吞吐量和引航船舶总数预测--基于协整检验与 ARMA 模型

利用广州港货物吞吐量和引航船舶总数的历史统计数据,基于时间序列计量分析技术构建和选择ARMA预测模型,对2010—2020年广州港货物吞吐量和引航船舶总数进行预测,探索广州港未来货物吞吐量和引航船舶总数发展变化的规律与特征。     

基于货物配装优先级的散货配装模型和算法

充分考虑配送距离、送货时间要求、货物价值以及客户重要性等因素,构建了货物配装优先级函数,并在满足货物配装优先级前提条件下,提出了单辆货车的载重和容积两者利用率最大的双目标散货配装模型.模型求解方法选取蚁群算法,将配装优先级引用到信息素以及能见度函数中,同时优化算法策略,加大求解速度和准确度.最后利用类似文献中的算例进行算法验证和结果比较,表明所提出的模型和算法法在实际运用中是可行的.     

混合算法在港口吞吐量预测中的应用

文章利用主成分分析方法,提取出影响宿迁港口吞吐量的关键因子,在此基础上,提出了一种新的运量混合预测方法,即联合时间序列法和因果分析法;最后通过回归分析,给出了宿迁港口吞吐量与国内生产总值的关系,为宿迁港的发展和港口总体布置规划提供了一定的依据。