Cruise port centrality and spatial patterns of cruise shipping in the Asian market

This paper investigates the centrality of cruise ports in the Asian cruise shipping market while proposing the hubs and authorities centrality (HACC) metric as a directional synthesis of the hubs centrality and authorities centrality to explore cyclical and directional features of centrality in the cruise shipping network. With the development of the cruise shipping industry, research has been actively conducted with a particular focus on identifying the characteristics of hub ports. This paper employs social network analysis to investigate the HACC which is originally developed for analyzing the cruise port centrality problem. Empirical study implies that Ho Chi Minh City, Hong Kong, Nagasaki, Penang, Phuket, Port Klang, Shanghai, and Singapore (in alphabetical order) reflects particulars of cruise hub ports. One of the exceptional results of this paper is Ho Chi Minh City, Penang, Phuket, and Port Klang have demonstrated high HACC (refers to hub ports) while limited degree and betweenness centrality. In contrast, Busan and Keelung are not classified as hub ports.     

乌鲁木齐市常规公交乘客满意度评价模型

由于市民出行主要还是依赖公交车,因此,公交系统是否完善不仅与乘客息息相关,而且直接影响城市的发展。采用模糊综合评价法对乌鲁木齐市沙依巴克区、天山区、新市区、头屯河区(含八钢居民聚居区)、水磨沟区、米东区(含原米泉市区)的公交乘客满意度进行综合评价,在问卷调查的基础上分析数据,结果显示,候车时间长度、换乘便捷度、服务态度、候车环境、车内卫生环境等对评价结果都有着不同程度的影响。通过乘客满意度评价体系的建立,在进一步提高服务水平的基础上,对城市公共交通运送能力的充分运用起到良好的导向作用。     

忠县长江公路大桥11号墩主梁牵索挂篮整体吊装设计施工

介绍忠县长江公路大桥11号墩主梁牵索挂篮采用的整体吊装施工方案。     

Stated preferences for investigating commuters' diversion propensity

A reasonable response to increasing traffic congestion may come from the rapidly developing traveler information systems. Such systems may be successful if they effectively influence drivers' enroute decisions; in this regard, a critical factor may be commuters' willingness to divert from their regular route in response to information about traffic congestion. This study evaluates the effects of real-time traffic information along with driver attributes, roadway characteristics and situational factors on drivers' willingness to divert.The empirical portion of this study is based on a survey of downtown Chicago automobile commuters. The stated preference approach was used to study commuters' diversion propensity. Drivers expressed a higher willingness to divert if expected delays on their usual route increased, if the congestion was incident-induced as opposed to recurring, if delay information was received from radio traffic reports compared with observing congestion, and if trip direction was home-to-work rather than work-to-home. Respondents were less willing to divert if their alternate route was unfamiliar, unsafe or had several traffic stops. Socioeconomic characteristics were also significant in predicting willingness to divert.     

Modeling cooperative and autonomous adaptive cruise control dynamic responses using experimental data

Vehicle longitudinal control systems such as (commercially available) autonomous Adaptive Cruise Control (ACC) and its more sophisticated variant Cooperative ACC (CACC) could potentially have significant impacts on traffic flow. Accurate models of the dynamic responses of both of these systems are needed to produce realistic predictions of their effects on highway capacity and traffic flow dynamics. This paper describes the development of models of both ACC and CACC control systems that are based on real experimental data. To this end, four production vehicles were equipped with a commercial ACC system and a newly developed CACC controller. The Intelligent Driver Model (IDM) that has been widely used for ACC car-following modeling was also implemented on the production vehicles. These controllers were tested in different traffic situations in order to measure the actual responses of the vehicles. Test results indicate that: (1) the IDM controller when implemented in our experimental test vehicles does not perceptibly follow the speed changes of the preceding vehicle; (2) strings of consecutive ACC vehicles are unstable, amplifying the speed variations of preceding vehicles; and (3) strings of consecutive CACC vehicles overcome these limitations, providing smooth and stable car following responses. Simple but accurate models of the ACC and CACC vehicle following dynamics were derived from the actual measured responses of the vehicles and applied to simulations of some simple multi-vehicle car following scenarios.     

漓江旅游客船回转性研究

文章借助船舶回航试验报告的有关数据和试验评价,分析了舵要素对漓江游船操纵性的影响,并提出了增强漓江旅游客船回转性的设想,为类似水域条件的船舶操纵性设计提供依据。     

影响中国留学生在美大学校园文化学习适应的相关因素研究

针对中美联合教育项目留学生在美国大学校园生活和学习的适应状况,本研究从多维的角度调查项目学生在学业方面遇到的主要问题及学生的性别、年龄、教育层次、在美时间等因素对学生文化学习适应的影响;调查项目留学生在美大学校园文化生活满意度与其对美国的态度、思乡、文化休克之间的关系,以期为国内大学发展与之相关的出国留学生适应辅助项目提供支持,为留学生出国前的语言培训、学业和心理准备提供帮助。     

客运专线乘客满意度模糊综合评价

利用模糊综合评价理论,研究客运专线乘客满意度的评价问题,从客运专线的运输特点和消费者的消费心理出发,构建客运专线乘客满意度评价体系,构建相应的多层次评价模型,并结合实例说明模型的有效性。     

成都地铁1号线乘客满意度评价体系的构建

顾客满意度模型可以定量地衡量产品或服务的质量,可以揭示顾客对产品或服务质量不满的原因,从而引导产品或服务提供方找到质量改进的方法和措施。以成都市地铁1号线运营为研究对象,从其运营的特殊性以及乘客满意度评价的主观心理特征入手,得出影响企业服务水平因素的满意度指标,利用层次分析法建立成都地铁1号线顾客满意度测评模型,对其服务水平和乘客满意度进行分析,旨在为成都地铁提高乘客服务水平的评价提供参考。     

广州市BRT满意度调查及运行效果分析

从广州中山大道BRT所服务人群的出行目的、优先选择的公共交通方式、乘车环境、乘车费用、乘车时间、换乘方式、BRT的优势以及BRT存在的问题等方面对BRT沿线车站的乘客进行问卷调查。经调查分析表明,乘客对BRT的满意度比较高,认为BRT的优势为班次密集、速度快,基本达到设计目的,但车上比较拥挤,还存在需要完善的地方。同时...