Ship Size and Service Configuration in Container Shipping

This study analyzes the effect of ship size on the liner service configuration by establishing an economic model.The service configuration is characterized by the distance of service and the number of calling ports.A study case is presented for illustration.At last such a conclusion is drawn that given a fixed profit,the ship size will change with the extension of service in the same direction,while the change rate of ship size is a little higher than that of the extension of service.     

基于Web Service标准的开放式船舶软件开发框架

XML（Extensible Markup Language）和WebS ervice作为W3C（World Wide Consortium）组织提出的国际标准,对整个IT及其相关行业产生了巨大的影响．船舶行业正处在大发展的时代,但是使用的软件大部分都从国外引进．为了促进船舶行业软件的开发,认识到船舶行业的信息化现状以及应用软件的网络化发展趋势,提出了基于Web Service标准的开放式船舶软件开发框架．这个框架使用XML作为标准的数据格式,以Web Service作为底层的IT支持基础．可以有效地利用现有的互联网,组织广大的船舶行业软件开发人员,共同开发开放式的可在网络上互相调用的松散耦合的软件服务．分析了此框架的可行性,并通过开发部署一个服务的实例展示了其先进性和实现的简易性．     

基于元胞自动机的船舶过闸运输组织仿真

三峡水利枢纽船闸设计通行能力与船闸实际通过能力不足的矛盾日益突出,为解决这一尴尬现实,将三峡船闸入口船舶流特征与道路交通中三线轨道交通模型结合起来,运用船舶过闸调度原理和元胞自动机理论构建了水利枢纽区域过闸组织模型,并对双向船闸和升船机组成的过闸系统进行模拟。研究结论反映了船舶达到规律对船舶流聚集和疏散的影响。最后对仿真结果给出具体的分析。     

雅马哈摩托车的ABS装置(2)

介绍雅马哈ABS 摩托车电路工作原理、液压系统结构与工作原理、ABS 装置的维修方法及安全骑乘注意事项等。     

快速公交系统通行能力计算方法研究

快速公交系统的通行能力是由瓶颈车站决定的.首先分析了车站通行能力的基本原理和主要影响因素,并基于排队论构造了单一停靠位通行能力的计算模型.同时,根据北京、杭州和昆明三地快速公交系统(公交专用道)的实际运营状况对模型参数进行了详细地标定和说明,提出缩短公交车平均停靠时间和改善系统运营稳定性是提升通行能力的重要途径.在此基础上,以北京市南中轴路快速公交为例,说明了模型的应用方法,并定量分析了各种因素对通行能力的影响.最后,对多停靠位车站的周转效率变化规律进行了分析,提出了其通行能力的计算方法.     

试论基层党组织宣传思想政治工作新思路

我国经进入了经济建设的新时期,在这一阶段各项工作都面临着新的挑战,因此不能再固守传统观念,要积极做出创新,以此为我国的发展提供更有力的保障.基层党组织是我国发展过程中的基础,因此基层党组织在思想和行动上必须保持先进,这也就要求必须做好提升党组织的思想政治工作,并对思想政治工作的宣传进行创新.基于此,本文针对基层党组织宣...     

外白渡桥工作状态模拟与使用安全评估

在对桥梁档案进行详细调查基础上,初步建立了外白渡桥工作模型,进而与1991年、2000年的实测结果进行对比来校正工作模型,最终建立了反映实际受力性能的三维力学模型。在实桥工作状态模拟的基础上,联合应用传统疲劳分析和工程断裂力学计算该桥剩余寿命,并给出确保外白渡桥使用安全的检测间隔和维修策略。     

试论社会主义新农村的基础架构

社会主义新农村建设是一项系统工程,一个有机联动的架构。通过对架构的解析,论证经济发展是新农村建设整个架构的核心,生态环境架构、社会文化组织架构、制度环境架构是经济发展架构得以顺利实现的保障。社会主义新农村建设重点在于寻求以经济发展为核心的各架构搭配的黄金分割点。     

Rethinking bus punctuality by integrating Automatic Vehicle Location data and passenger patterns

This paper investigates punctuality at bus stops. Although it is typically evaluated from the point of view of bus operators, it must also account for users, as required in recent service quality norms. Therefore, evaluating punctuality at bus stops is highly important, but may also be a complex task, because data on both bus arrivals (or departures) and users must be taken into account and processed. Data on buses can be collected by Automatic Vehicle Location (AVL) systems, but several challenges must be addressed in order to use them effectively. Passengers data at bus stops cannot be derived from AVL, but they can be used to derive passenger patterns and need to be integrated into processed AVL data. This paper proposes a new punctuality measure defined as the fraction of passengers who will be served within an acceptably short interval after they arrive. A method is proposed to determine this measure: it provides (i) several rules to handle AVL collected data, (ii) a procedure integrating processed AVL data and potential passengers’ patterns and (iii) a hierarchical process to perform the punctuality measure on each bus route direction of a transit network, as well as for every bus stop and time period. The paper illustrates the experimentation of this method on more than 4,000,000 data of a real bus operator and represents outcomes by easy-to-read control dashboards.     

Air cargo operations: Literature review and comparison with practices

This study reviews the literature on air cargo operations and compares theoretical studies with the practical problems of airlines, freight forwarders, and terminal service providers. In particular, we review studies in which mathematical models were used to identify the essential characteristics of air cargo operations, such as the intrinsic differences from passenger operations, and to explore the service processes in air cargo operations. The typical models used in previous studies are summarized. We then highlight the insightful findings from an industrial interview and present the gaps between previous research and practical realities. We finally discuss the new research opportunities of air cargo operations according to the gaps.