Empirical analysis of free-floating carsharing usage: The Munich and Berlin case

Carsharing has become an important addition to existing mobility services over the last years. Today, several different systems are operating in many big cities. For an efficient and economic operation of any carsharing system, the identification of customer demand is essential. This demand is investigated within the presented research by analyzing booking data of a German free-floating carsharing system.The objectives of this paper are to describe carsharing usage and to identify factors that have an influence on the demand for carsharing. Therefore, the booking data are analyzed for temporal aspects, showing recurring patterns of varying lengths. The spatial distribution of bookings is investigated using a geographic information system and indicates a relationship between city structure and areas with high demand for carsharing. The temporal and spatial facets are then combined by applying a cluster analysis to identify groups of days with similar spatial booking patterns and show asymmetries in the spatiotemporal distribution of vehicle supply and demand.Influences on demand can be either short-term or long-term. The paper shows that changes in the weather conditions are a short-term influence as users of free-floating carsharing react to those. Furthermore, the application of a linear regression analysis reveals that socio-demographic data are suitable for making long-term demand predictions since booking numbers show quite a strong correlation with socio-demography, even in a simple model.     

基于云服务的交通量计算系统的设计

为了提高交通量数据采集与计算能力,基于云服务设计了一个交通量计算系统,集中处理全市交通量数据.应用了Windows Mobile智能设备开发技术编写了手机端交通量计数器程序,通过3G网络实现了交通量原始数据的上传.在云服务中心,应用了Excel VBA二次开发技术生成了各种统计图表,调查员在工作中,随时可下载统计图,了解交叉口的实时交通流量、流向等数据.实践证明,该交通量计算系统扩展性良好,能应对大城市交通量计算需求,能够推进智慧交通、智慧城市的建设.     

A comparative analysis of transportation-based accessibility to mental health services

The demand for mental health services has been growing stronger over the last couple of decades. This indicates the need to study and assess the access to these mental health services especially with a focus on the vulnerable populations having the greatest need. As such, this paper presents a Geographical Information Systems (GIS)-based analysis in order to study and evaluate the accessibility of mental health facilities using the information on the spatial distributions of population and facilities, and regional traffic characteristics. For this purpose, different age group segments are utilized including the total population as well as those aged between 18 and 21, 22 and 49, 50 and 64, and those aged over 65 and 85. Focusing on the State of Florida, spatially detailed accessibility metrics are calculated with regard to healthcare facilities using travel times between population block groups and these critical mental health facilities. These estimates are used to calculate the weighted county accessibility scores for each county. Findings clearly delineate those counties that lack access to mental facilities, especially those in Northwest Florida, a demographically diverse and substantially rural region. This type of analysis can help planners and policy makers develop better strategies in order to provide adequate mental health care options needed in targeted locations.     

有反馈和N-策略多重休假的M^X／（G，Gm）／1排队模型

研究N-策略多重休假下，顾客是批量到达的M^x（G，Gm）／1排队模型。一旦系统空闲服务台就开始一个随机长度的休假，休假结束后，如果发现顾客数达到或超过N，就立即对顾客进行服务直到系统空闲，如果发现顾客数小于N，就进行下一阶段随机长度休假。服务台提供两阶段服务：第一阶段初步服务和第二阶段m种选择服务。在第一阶段初步服务结束后，顾客可以回到队列要求重新服务，也可以立即离开系统，或接受第二阶段m种选择服务中某一种服务。通过补充变量法得到了稳态下系统队长的概率母函数和其随机分解性质。进一步计算出系统稳态的队长及其他性能指标。     

高速公路路网精细化编码与定位研究

结合现有高速公路路政客户服务呼叫中心在应急事故和紧急救援时所面临的用户定位问题,分析了现行道路定位方式在行驶方向、立交匝道等处精确定位时所存在的不足,提出一种建立于国家统一路网命名和编号规则基础之上,包含道路编号、百米桩号、行进方向和传输校验4大要素的路网精细化定位编码标识,并给出了编码规则和标志制作安装方法,使得高速公路的管理人员和司乘人员能方便快捷的获取精确的道路定位,从而指引管理部门快速反应,为交通应急指挥和紧急救援赢得宝贵的时间。     

Development of location-based services for recommending departure stations to park and ride users

More and more commuters are beginning to favour public transportation. Fast and convenient park and ride (PnR) services provided by public transportation authorities are the result of changes of household demographics and household, increasing fuel prices and a focus on environmental sustainability. However, lack of parking spaces in PnR facilities creates a major bottleneck to this service. The aim of this research is to develop a location-based service (LBS) application to help PnR users choose the best train station to use to reach their destination using a multicriteria decision making model. A fuzzy logic method is used to estimate parking availability when a user is estimated to arrive at a PnR facility. Two surveys are conducted to collect traffic flow, travel behaviour and service quality data at four selected Perth Western Australia train stations. With the proposed approach and survey data, a prototype of LBS application, Station Finder, was developed using the Android SDK 4.0 and Google API 16. This application is a useful and practical tool to save travel cost and time of PnR users’.     

网络环境下高校图书馆服务模式的思考与探索

文章首先对网络环境下的图书馆给出了新的定义,分析了数字化图书馆服务模式的变化及网络环境下图书馆读者服务工作的必要性,最后给出了服务模式思考与探索的建议。     

新型城镇化与交通发展

城镇化是21世纪中国发展的重大趋势。首先指出中国城镇化呈现规模巨大、高速增长的态势,同时面临城市管理者赶超心理、公共服务发展滞后的挑战。探讨中国行政管理体制下城市发展模式导致的城市面积迅速扩大、城市成本增加、引发地方发展隐性债务危机等问题。重点从交通与区域发展、交通与服务业发展、交通与城市成本、交通与房地产、交通资源配置与市场、交通配置标准与城市发展、交通港站与城市发展七方面论述新型城镇化与交通发展的关系。     

城市化进程中农民工与公共文化服务体系构建研究

文章从农民工的文化困境及权益保障出发,探讨了公共文化服务体系建设对促进农民工城市融入的意义与作用,以期为进一步提高我国城市化水平提供理论基础。     

基于铁路智能运输系统架构的货运服务系统逻辑框架建设

基于发展先进货运服务系统的迫切要求,从系统科学的思维角度出发,采用面向过程的研究方法,通过分析整套货物运输作业流程,提出了基于铁路运输系统面向货主的货运服务系统需求分析表。在充分考虑货运服务需求和系统智能化发展需求的基础上,借鉴企业架构规划思想,运用模糊聚类分析方法,构建了基于铁路智能运输系统（RITS）货运服务系统的综合服务框架,并完成了货运服务系统顶层逻辑框架DFD图,实现了RITS货运服务系统的逻辑框架功能模块的划分。