全球供应链视角的东亚港口物流服务绩效与趋势分析*

东亚港口基于旺盛的贸易运输需求而在全球供应链体系中崛起,同时也因为港口拥挤等问题而存在降低贸易成本的空间。首先从全球供应链视角解析港口物流服务格局,突出了东亚地区、特别是中国港口的地位,评价港口物流的综合绩效和竞争状态,然后对发展趋势做出预测。研究发现：东亚港口将通过持续投资实现供给需求的动态平衡;日本地震引致的全球供应链重组将使港口物流服务发生结构性变化,东亚将加强跨国港口物流合作以满足区域经济一体化的要求。     

港口物流与南通区域经济发展的实证研究*

为了更好地理解港口物流与南通区域经济的关系,制定出合适的协同发展战略,选取1990—2011年港口物流与南通区域经济的数据作为研究对象,对港口物流与南通区域经济的关系进行了实证分析。结合指标的合理性和数据的可得性选取了分析变量;在此基础上运用Granger因果检验的方法对港口物流和南通经济之间的关系进行了研究,研究结果表明:港口物流与南通区域经济存在着单向的因果关系,港口物流对区域经济的促进作用比区域经济对港口物流的促进作用要稍大一些。     

中小物流企业低碳之道

针对国内中小物流企业发展现状,从企业发展模式、业务拓展、发展策略、市场营销等方面,提出符合其实际状况、较为可行的低碳物流建设途径.     

Dynamic charging-while-driving systems for freight delivery services with electric vehicles: Traffic and energy modelling

This paper presents a research on traffic modelling developed for assessing traffic and energy performance of electric systems installed along roads for dynamic charging-while-driving (CWD) of fully electric vehicles (FEVs).The logic adopted by the developed traffic model is derived from a particular simulation scenario of electric charging: a freight distribution service operated using medium-sized vans. In this case, the CWD service is used to recover the state of charge of the FEV batteries to shortly start with further activities after arrival at the depot.The CWD system is assumed to be implemented in a multilane ring road with several intermediate on-ramp entrances, where the slowest lane is reserved for the dynamic charging of authorized electric vehicles. A specific traffic model is developed and implemented based on a mesoscopic approach, where energy requirements and charging opportunities affect driving and traffic behaviours. Overtaking manoeuvres as well as new entries in the CWD lane of vehicles that need to charge are modelled according to a cooperative driving system, which manages adequate time gaps between consecutive vehicles. Finally, a speed control strategy is simulated at a defined node to create an empty time-space slot in the CWD lane, by delaying the arriving vehicles. This simulated control, implemented to allow maintenance operations for CWD that may require clearing a charging zone for a short time slot, could also be applied to facilitate on-ramp merging manoeuvres.     

Are railways really that bad? An evaluation of rail systems performance in Europe with a focus on passenger rail

With a large number of railway development projects in Europe and worldwide, which once completed will be serving rail passengers of the future, this paper aims to take a step back and evaluate current railway systems performance. The objectives are to compare statistical data on various passenger-related parameters of the railway system in a number of selected European countries and draw conclusions on the level of their performance when compared to the European average.Analyses of publically available statistical data, extracted from the Eurostat service at a European level will allow for a comparison of various indicators which influence the performance of the railway systems from an infrastructure and operational perspectives. The analyses will also allow identifying key performance indicators for the accurate assessment of the rail systems.The paper will highlight case studies for various parameters which are important to stakeholders of the railways, including infrastructure managers, rail operators, policy makers and the end users. This knowledge will be to the benefit of today’s railway industry as well as the rail systems of the future, as it will show trends drew upon existing data which might continue in the future.     

A comparison of different container sorting systems in modern rail-rail transshipment yards

Rail-rail transshipment yards act as central hub nodes within a railway network and enable a rapid consolidation of containers between different freight trains. To avoid an excessive movement of gantry cranes when transferring a container from one train to another, modern yards apply sorting systems where shuttle cars move containers horizontally along the spread of the yard. This paper compares four elementary sorting systems. Specifically, we compare rubber-tired and rail-mounted shuttles and differentiate whether a pure shuttle system or a lift & shuttle system is applied. In pure shuttle systems, a shuttle receives a container from a crane and transports it towards the destination crane, where it serves as a storage device until being unloaded. A lift & shuttle system applies shuttles with an integrated lifting platform, so that they are able to autonomously store and receive containers from a separate storage rack. Both alternatives exist in rubber-tired and rail-mounted versions. As the shuttles are the main driver of the investment costs, we compare the required fleet size for timely supplying given gantry crane schedules within all four systems. For this purpose, we derive suited scheduling procedures. This way, decision support for yard managers having to identify a suited sorting system and to layout a new terminal is provided.     

一起电路问题引起转辙机动接点回退分析

结合一组Z Y J7+S H6型电液转辙机油缸反弹造成动接点回退问题,从电路和联锁方面进行分析与处理,通过对ZYJ7+SH6型电液转辙机续操电路和室外道岔动作机械特性分析和探讨,找到动接点回退的真实原因。     

辽宁临港经济区港口航运物流企业人员跨文化适应能力分析及对策研究

随着我国参与经济全球化的长足发展,省域内临港经济区内的跨文化交流日益频繁,同时跨文化适应问题也越发突显,并以前所未有的速度影响着港口航运物流企业人员的工作表现。通过采用SPSS软件和Microsoft Excel软件对调查数据进行的统计分析,发现相关企业人员的跨文化适应情况与工作表现呈现正相关关系。通过进一步分析发现影响这些人员的跨文化适应的社会文化和心理因素表现出共性特征。这为临港经济相关专业"专业英语"教学改革提供了依据。     

An RFID-based inventory management framework for emergency relief operations

In the aftermath of super storm Sandy, a large region from North Carolina to Maine endured food shortages, power outages, and long lines at gas stations forced to ration fuel due to low supply and high demand. These issues were largely the result of the affected transportation network’s inability to effectively cope with random and highly dynamic changes, and a lack of available resources and suppliers who were capable of enacting adequate emergency response measures. These problems experienced during super storm Sandy further underscored the need for a robust emergency inventory management system, where planning policies can be integrated with real-time on-line inventory management strategies to keep track of fluctuations of vital commodities such as food, water, medicine, fuel and power supplies. Motivated by this important problem, this paper investigates a comprehensive feedback-based emergency management framework for disasters such as super storm Sandy that provides integration with an emerging intelligent transportation systems technology, namely Radio Frequency Identification Devices (RFID). Within this framework, the offline-planning problem is solved by the stochastic humanitarian inventory management approach; and the online modeling strategy includes the application of a continuous time model predictive control technique. After introducing the mathematical background, the proposed framework is discussed using case studies built based on super storm Sandy in order to understand the efficiency and practicality of this RFID-based methodology. Results suggest that the methodology can properly account for and react to the rapidly changing needs for vital supplies that occur during the emergency relief operations. Based on this approach, planners and decision makers can be aware of the time delay that can happen due to disaster-related disruptions and thus maintain a safe level of buffer for vital supplies.