高速公路路面结构脱空病害养护技术探讨

高速公路路面结构脱空是一种常见的病害。针对高速公路水泥砼路面结构存在的脱空等病害问题，提出了相应的防护性处理措施，认为加强高速公路维修有助于以提高整个高速公路的质量，延长高速公路的使用寿命。     

Commuters’ behavior towards upgraded bus services in Greater Beirut: Implications for greenhouse gas emissions,social welfare and transport policy

Climate change is one of the most critical environmental challenges faced in the world today. The transportation sector alone contributes to 22% of carbon emissions, of which 80% are contributed by road transportation. In this paper we investigate the potential private car greenhouse gas (GHG) emissions reduction and social welfare gains resulting from upgrading the bus service in the Greater Beirut Area. To this end, a stated preference (SP) survey on mode switching from private car to bus was conducted in this area and analyzed by means of a mixed logit model. We then used the model outputs to simulate aggregate switching behavior in the study area and the attendant welfare and environmental gains and private car GHG emissions reductions under various alternative scenarios of bus service upgrade. We recommend a bundle of realistic bus service improvements in the short term that will result in a reasonable shift to buses and measurable reduction in private car emissions. We argue that such improvements will need to be comprehensive in scope and include both improvements in bus level of service attributes (access/egress time, headway, in-vehicle travel time, and number of transfers) and the provision of amenities, including air-conditioning and Wi-Fi. Moreover, such a service needs to be cheaply priced to achieve reasonably high levels of switching behavior. With a comprehensively overhauled bus service, one would expect that bus ridership would increase for commuting purposes at first, and once the habit for it is formed, for travel purposes other than commuting, hence dramatically broadening the scope of private car GHG emissions reduction. This said, this study demonstrates the limits of focused sectorial policies in targeting and reducing private car GHG emissions, and highlights the need for combining behavioral interventions with other measures, most notably technological innovations, in order for the contribution of this sector to GHG emissions mitigation to be sizable.     

Flexible feeder transit route design to enhance service accessibility in urban area

To improve the accessibility of transit system in urban areas, this paper presents a flexible feeder transit routing model that can serve irregular‐shaped networks. By integrating the cost efficiency of fixed‐route transit system and the flexibility of demand responsive transit system, the proposed model is capable of letting operating feeder busses temporarily deviate from their current route so as to serve the reported demand locations. With an objective of minimizing total bus travel time, a new operational mode is then proposed to allow busses to serve passengers on both street sides. In addition, when multiple feeder busses are operating in the target service area, the proposed model can provide an optimal plan to locate the nearest one to response to the demands. A three‐stage solution algorithm is also developed to yield meta‐optimal solutions to the problem in a reasonable amount of time by transforming the problem into a traveling salesman problem. Numerical studies have demonstrated the effectiveness of the proposed model as well as the heuristic solution approach. Copyright © 2015 John Wiley & Sons, Ltd.     

以数据为中心的舰载分布式系统

在分析传统的以处理为中心的舰载分布式系统存在的诸多瓶颈的基础上,研究了以数据为中心的设计方法。采用实时发布-订阅协议的数据分发服务,提供了1种以数据为中心的通信规范,定义了1个可扩展、与平台无关、与位置无关的基础服务模型。该模型在空间、时间、传输、功能方面都是松散耦合的。实时数据发布者和订阅者,通过设置和调整服务质量参数,可以实现不同的数据需求和传输方式。系统内的各种数据能轻松发送和接收,有利于系统灵活动态的扩展和升级,易于组建更大范围的应用系统。     

JJK14-6/550型交流窄轨架线式电机车

文章介绍了一种交流窄轨矿用机车的直—交逆变传动原理、总体布置、主要部件、机车性能、特点以及该机车的运用考核情况,指出该车是适用于冶金、矿山等地面或井下长距离水平巷道运输比较理想的牵引动力。     

构建服务型海事执法督察工作的思考

文中列举和分析了海事执法督察工作的现状和存在的问题，阐述了海事执法督察工作的内涵，并提出了建立服务型海事执法督察工作的设想。     

医疗服务质量管理综述

以病人为中心,提高医疗服务质量,是医院管理的重点问题。现阶段医疗服务存在的主要问题之一是重视技术质量,忽视服务质量;在服务质量方面目前主要考虑改善服务态度,而对改进服务流程、方便病人就医等重视不够。     

船舶安全评价探讨

长江港口通过多年大规模的建设,已成为沿江综合运输体系的重要枢纽,承担了沿江能源、外贸物资、石油、集装箱、煤、矿石等货物的运输任务。近十几年来是长江港口基础设施投入资金最多,基础设施建设最快,港口结构调整成效显著,港口吞吐量增长迅速,科技含量、管理水平和人员素质迅速提升的时期,港口建设取得了巨大的成就,港口综合竞争力明显提高。如何综合考核港口发展状况是当前的一项重要课题。