Does European high-speed rail affect the current level of air services? An EU-wide analysis

This paper analyses whether the current provision of air services in Europe is impacted by high-speed rail (HSR). An ex-post analysis is carried out considering 161 routes EU-wide using transnational data. We use censored regressions with special attention paid to the presence of outliers in the sample and to the potential problem of non-normality of error terms. It is found that shorter HSR travel times involve less air services, with similar impact on both airline seats and flights. This impact quickly drops between 2.0- and 2.5-h HSR travel time. The impact of HSR frequencies is much more limited. Hubbing strategies led by the airlines have the opposite effect from HSR, as hubs involve more air services. Airline/HSR integration at the airport and cities being served by both central and peripheral stations have no significant impact. Metropolitan and national spatial patterns may help to better understand intermodal effects.     

公路货物运输装载安全标准体系研究

公路运输中,车辆由于行驶状态的改变,会产生各种不同的作用力于货物上,装载安全的目的就是为了抵抗这些作用力,防止货物滑动、掉落或滚动.通过对目前公路运输货物种类划分的研究,确定了我国公路运输货物的种类,通过对货运过程的分析,剖析货物装载环节中影响货运安全的因素,依据重点突出公路运输货物的种类的原则,确定道路货物运输装载安全标准体系框架,编制道路货物运输装载安全标准体系表,并提出标准体系的实施措施.     

汽车空调结霜研究

本文根据汽车空调系统的工作原理分析了空调结霜的机理,根据系统原理对影响空调结霜的几种因素进行了阐述,介绍了空调系统结霜的评价方法.     

2000t级化学品运输船液货装卸速率计算分析

为了确定化学品运输船的装卸货速率,在确定液货舱透气系统的高速透气阀空气透气能力后,通过计算货品蒸发气生成率及对液货蒸发气和空气混合物的容积流量的密度修正,得出化学品船舶的最大装卸货速率.     

固体散货运输船舶自沉事故分析与对策

针对中国沿海固体散货运输船舶自沉事故高发的现状,应用事故数据统计和案例分析的方法,对中国沿海发生的固体散货运输船舶自沉事故进行了深入分析,并提出相应的对策。     

Impact of the container security initiative on Taiwan's shipping industry

This paper evaluates the impact of risk factors from the container security initiative on Taiwan's shipping industry by employing a risk management matrix to identify the severity and frequency of CSI risk factors, and discovers some appropriate risk management alternatives. This paper's findings are as follows: (1) The majority of risk factors have a moderate-risk level, and possible alternative risk management measures include risk prevention, self-retention and insurance. (2) Ensuring a balance between the efficiency of maritime logistics and supply chain security is of vital importance to any trading countries dealing with security risk issues. (3) The government should encourage the private sector to design and market security hardware and software, which will promote the growth of the domestic security industry and generate employment opportunities.     

Factoring a real value of cargo in port investment and funding decisions

Ports are marine gateways to economic activities. Ports’ ability to perform services depends on their facilities, harbor conditions, and other factors. Generally, ports have control over their facilities but must compete for funding to improve them. As for waterways, in the U.S., a Harbor Maintenance Trust Fund was established to fund dredging, which levies a 0.125% cargo value tax on most shippers using U.S. coastal and Great Lakes harbors. Yet, commonly, a gross tonnage metric is used to allocate the fund’s resources, resulting in under-maintenance of some harbors. This, reportedly, deters additional port funding and hinders valuable commerce. Supplemental economic metrics, such as value of commerce or cargo, can improve port financing decisions, but such data is not readily available. Container ports collect cargo value data in nominal terms, but bulk ports do not. When making economic decisions, however, real values must be used. Further, when allocating resources, decision-makers must be able to assess ports over time and relative to each other. Conforming to these criteria, this paper develops three port financing indicators based on a real value of cargo and illustrates their calculations using the U.S. Port of Duluth-Superior as a case study.     

船载货物监控传感网络的设计与实现

针对传统船载货物监控成本高、数据可信度低、系统不易拓展的现状,设计了船载货物的海事监控传感网络系统.系统由基于无线传感器网络的船载监控网络、基于通用分组无线业务技术(GPRS)的公共移动通信网络和基于浏览器/服务器(B/S)模式的上位机监控平台组成.船载监控网络采用分层的网络拓扑结构、自适应成簇算法、统一的通信协议,终端节点采用休眠/激活机制,提高了网络的健壮性和寿命.GPRS网络能将紫蜂(ZigBee)网络采集的传感信息及时投递至远程服务器,监控中心人员通过浏览器即可查询货物各方面的状况.本系统在实验测试中表现出性能稳定、实时性强、数据可靠性高等特点,可为类似研究提供一定参考.     

基于博弈论的货主船队发展风险及合作研究

干散货船队业务经营范围遍及全球,其波动周期和变化规律与全球贸易及世界经济紧密相关.为了探讨干散货货主船队快速发展引发的航运市场风险及货主企业与专业船队合作共赢的途径,在理论分析的基础上,运用博弈论相关理论知识建立了货主企业与航运企业的动态博弈模型,并提出货主企业与专业船队应将共同组建船队及签订长期运输合同作为主要的合作模式.该研究对于促进干散货航运市场的稳定及货主企业和专业船队发展具有现实意义.     

核援救舰船救生通道的防核污染方法研究

随着涉核舰船的大量使用,核援救成为舰船必须考虑的问题。本文分析防护区、救生通道的现状、存在的问题,估算3种方法在人通过通道时所附加的新风需求量,分析了3种方法的防护能力,可供涉核人员参考