基于JMS和Web Services的企业应用集成系统的设计与实现

自从企业应用系统被广泛使用以来,企业应用集成技术就随着应用技术的不断发展而产生变化。从最初的使用简单文件进行数据交换发展到RPCs、分布式对象、事务监视器,再到最近被广泛使用的消息系统和网络服务技术。从另一方面看,企业集成的角度也从单一向多层次的趋势发展。文中主要介绍如何基于JMS和Web Services技术设计和实现企业应用集成系统,通过这两种技术可以轻松解决其它EAI技术在使用中遇到的难题。     

谈PSC检查及避免船舶被滞留的措施和做法

介绍了PSC的由来、工作依据、程序和目的,分析中国船舶在国外PSC检查中的滞留状况、主要缺陷和主要原因,指出了避免被滞留应采取的措施和做法。     

驾驶过程中手机使用行为数据采集及分析

驾驶过程中使用手机的行为存在安全隐患,是当今导致交通安全事故的原因之一。文章借助于信息技术开发出采集使用手机行为数据的App,从真实数据出发,客观地分析驾驶员在开车过程中使用手机这一不良驾驶行为的覆盖程度及危险程度,并提出将手机使用行为作为驾驶风险评价因子。     

RFID技术在供应链中的应用

介绍了RFID的发展历程和关键技术,对电子标签的应用及工作原理、优点等进行了阐述.从信息与利润共享入手论述了电子标签对供应链产生的影响,对RFID技术在供应链中的应用做了分析和预测,并结合中国实际对如何发展RFID在物流供应链中的应用提出了一些建议.     

Analyzing urban bus service reliability at the stop, route, and network levels

Improving the reliability of bus service has the potential to increase the attractiveness of public transit to current and prospective riders. An understanding of service reliability is necessary to develop strategies that help transit agencies provide better services. However, few studies have been conducted analyzing bus reliability in the metropolis of China. This paper presents an in-depth analysis of service reliability based on bus operational characteristics in Beijing. Three performance parameters, punctuality index based on routes (PIR), deviation index based on stops (DIS), and evenness index based on stops (EIS), are proposed for the evaluation of bus service reliability. Reliability involves routes, stops, punctuality, deviation, and evenness. The relationship among the three parameters is discussed using a numerical example. Subsequently, through a sampling survey of bus lines in Beijing, service reliability at the stop, route, and network levels are estimated. The effects of route length, headway, the distance from the stop to the origin terminal, and the use of exclusive bus lanes are also analyzed. The results indicate low service reliability for buses in Beijing and a high correlation between service reliability and route length, headway, distance from the stop to the origin terminal, and the provision of exclusive bus lanes.     

鱼梁航运枢纽鱼道及鱼类增殖保护站设计浅述

航运枢纽的建设对鱼类生态环境及鱼类资源影响较大,为减缓工程对鱼类的不利影响,文章通过综合分析,提出采取修建过鱼设施和建立增殖保护站、开展人工增殖放流为主要鱼类保护措施,并结合鱼梁枢纽工程,对鱼道结构及布置、增殖保护站布置及生产方式等设计进行介绍。     

广西南梧公路苍梧县林水段通行能力研究

文章对南梧公路苍梧县林水段通行能力和服务水平进行了研究和比较,介绍了通行能力计算公式和参数选取过程,论证了该路段的通行能力可以满足2020年前的交通需求,并提出了提高现有公路通行能力的方法和建议。     

Mobile ICTs and physical mobility: Review and research agenda

The question of the relationship between the spread of communication tools and the physical mobility of individuals is not new and arose with the arrival of the fixed telephone and, more recently, the development of the Internet and especially e-commerce. The extraordinary spread of individual, especially portable, communication tools like the mobile phone, has recently generated new interest in this topic in the fields of transportation economics, geography and sociology. This article discusses the main topics that have been explored, from the debate between complementarity and substitution to analyses in terms of interactions with the spatiotemporal organization of daily activities, the size and maintenance of social networks, and, finally, perception of travel and spaces. We then identify several issues that we think merit further exploration.     

The effectiveness of a European speed limit versus an international bunker-levy to reduce CO2 emissions from container shipping

In the fight to reduce CO₂ emissions from international shipping, a bunker-levy is currently under consideration at the International Maritime Organization (IMO). Faced with the inability of the IMO to reach an agreement in the short term, the European Commission is now contemplating a unilateral measure of a speed limit for all ships entering European Union (EU) ports. This paper argues that this measure is counterproductive for two reasons. Firstly, because it may ultimately generate more emissions and incur a cost per ton of CO₂ which is more than society is willing to pay. Secondly, because it is sub-optimal compared to results obtained if an international bunker-levy was to be implemented. These elements are illustrated using two direct transatlantic services operated in 2010.     

An operational activity-based method to estimate CO2 emissions from container shipping considering empty container repositioning

This paper develops an operational activity-based method to estimate CO₂ emissions from container shipping in contrasts to the traditional aggregated activity-based method. Two case studies investigate the impacts of empty container repositioning policies and port handling capacity on CO₂ emission index. The results show that the aggregated method could well overestimate CO₂ emissions and the operational activity-based method is more appropriate. The paper also demonstrates that high port-handling capacity and efficient empty container repositioning could reduce CO₂ emissions in seaborne container transportation.