Modelling emission control taxes in port areas and port privatization levels in port competition and co-operation sub-games

Using a game theory approach, this paper analyses a situation in which the government imposes a certain emission tax on vessels and port operations for emission control in port areas. Two ports are considered: a purely private port and a landlord (partial public) port. These two ports are in Cournot or Bertrand competition or cooperation with differentiated service. Our model outcomes lead to the following conclusions. First, the optimal private level of port 2 under Cournot and Bertrand competitions varies between fully private and highly public concerned port, while government will prefer a highly public concerned or close to highly public concerned port in the cooperation scenario. Second, government will have to make more and stricter efforts to enhance environmental protection in the situation of port cooperation (monopoly) than in the case of inter-port competition, and all the optimal emission tax should be always lower than the marginal emission damage. Third, port privatization has a non-monotonous effect on ports’ environmental damage in the inter-port competition scenarios and a monotonous decreasing effect in the cooperation scenario. Fourth, the total emission tax revenue is always higher than the overall environmental damage in the cooperative scenario, and it may or may not be able to cover the whole environment damage in Cournot and Bertrand competitions. Finally, the government may face a trade-off among environmental protection, maximizing social welfare, satisfying individual motivation, when considering port cooperation (monopoly).     

A study of economic efficiency in port security inspection

The purpose of this paper is to study an economic efficiency for the prediction of additional truck turnaround time and for determining the number of the port security inspection equipment required at a terminal inspection station. The economic efficiency with six base models was developed to assist terminal operators' decision‐making. In addition, this study developed an optimal procedure that terminal operators could use to optimally run in terms of various statistics processes including exponential, deterministic, and others, seeking a solution that was beneficial for both terminal operators and truckers. As a result of this research of the additional cargo turnaround time for port security delay, the following conclusion can be drawn and made. The average additional delay time in the inspection station is very dependent on the inspection rate of the lower stage. The higher weighted inspection time based on raising security level allows less number of trucks to be inspected, which will derive high delay in the inspection station. Increase of rate of Green Lane usage will allow a decrease in the arrival rate, which may derive improvement of inspection equipment efficiency and average delay time at the inspection station. In multiple stage model, total number of trucks and delay time very closely follow those of low inspection stage rate and number of inspection units. Free Lane is to be followed by Customs‐Trade Partnership Against Terrorism and standardization of customs, packing, loading and unloading, documents, procedure, and exchange working in each country. Copyright © 2012 John Wiley & Sons, Ltd.     

柴油机气道试验中缸内涡流转速的测量方法

本文在稳流模拟试验台上，利用三种涡流计测量了不同横截面高度的缸内涡流，分析了涡流计型式及测速位置对缸内涡流转速测量结果的影响，阐述了缸内速度分布对涡流测量影响的变化规律。     

港口物流服务中的关系营销之探讨

首先分析港口物流服务中关系营销的层次，随后阐述了港口物流服务中关系营销的主要内容，最后给出了关系营销的策略建议，供我国港口企业开展物流服务营销参考。     

滨州港海域泥沙运动遥感图像分析

通过滨州港所在海域的卫星遥感图像分析,揭示了在不同条件下海域的含沙量分布特征和泥沙的运动规律,并对其形成的原因进行了初步的分析。结果表明,滨州港海域的含沙量总体是比较高的,近岸区比邻近的黄骅港海域含沙量还要高。海域含沙量受风浪影响较大,涨落潮时在东北风作用下海域含沙量比较大。从泥沙运动的角度而言,受已建导堤影响,落潮水流和风吹流、波生流等叠加可能形成较复杂的向外水流和环流,携带泥沙向外输运,使高含沙水体运动更远的距离,一般情况下可达-6 m等深线以远。     

港区海损事故浅析

通过对港区管理现状及进出港区船舶的分析,提出防范措施。     

洋山港疏浚土资源化利用探讨

位于杭州湾湾口北侧、上海市东南方的崎岖列岛,由数十个小岛组成,是离上海市最近的拥有深水岸线的岛屿群。依托于崎岖列岛建设的洋山港,是一个通过（东海）大桥连接于大陆的典型离岸海港,由于毗邻多水多沙的长江口且当地潮汐强度大,港内水体以含沙量高、流速大为主要特点,因而预期营运后港口存在大量维护性疏浚土需处理的问题。文章结合港口平面形态、疏浚部位与强度和可持续发展的要求,拟从适宜的维护疏浚方式、泥土处理的环保要求以及港内适宜布置泥土处理的条件等方面,提出洋山港疏浚土资源化利用方案。     

青岛港铁矿石物流发展研究

随着世界经济区域化、国际化、一体化的发展,以港口为中心的现代物流日益成为区域经济发展的"动脉",进而成为区域经济发展的"龙头"。2001年以来,青岛港提出建设区域性航运中心、发展港口物流的发展战略,本文正是以此为背景而进行的。青岛港已经具备了发展港口物流的各种良好优势和条件,建设铁矿石物流中心的前景看好。     

宁波港向“第四代港口”跨越式发展的战略思考

阐述了第四代港口的内涵.针对宁波港面临的机遇和挑战,分析了其向第四代港口跨越式发展的条件;并从集装箱运力、基础设施、服务功能、海陆一体化、经济腹地等5方面论述了其存在差距及努力方向.     

天津港重大工程建设中水动力泥沙问题研究

基于天津港近些年来重大工程项目的建设,利用物理模型、数学模型及现场实测资料分析等科研手段,对天津港深水航道的建设、南疆港区的扩建、南北防波堤的延伸及东疆港区海岸一期工程的建设,进行了一系列的试验研究。(1)天津港海域开挖建设深水航道从自然条件方面是可行的;(2)海河口北治导线南移,使两治导线间距由1900 m缩为1200 m。既能满足泄洪要求,又能扩大南疆的用地面积;(3)防波堤延伸至16+0,港内的流态及泊稳均能满足设计要求,可使天津港减少60%的淤积量;(4)试验结果对东疆港区东海岸一期工程人工沙滩的冲淤稳定性、港内的水体交换等,提出了优化措施。