Accommodating preference heterogeneity in commuting mode choice: an empirical investigation in Shaoxing,China

A latent class model is developed to accommodate preference heterogeneity across commuters with respect to their mode choice between electric bike, private car, and public bus within the context of China. A three-segment solution – ‘electric bike individuals’, ‘private car addicts’, and ‘public bus enthusiasts’ – is identified, each characterized by heterogeneous preferences regarding specific mode attributes and unique socio-demographic profile. The choice model confirms the determinative effects of perceived alternative attributes on commuting mode choice, while the traditionally used objective attributes – travel time and cost – are found to have relatively small influences. The membership model provides solid explanations for these segment-specific preferences. This study provides a better understanding of the nature of mode choice behavior, which can be useful for strategies tailored to a specific segment in order to promote the use of sustainable transport modes.     

利用核爆炸双光峰特征时间的爆高测量方法研究

本文提出了利用特征时间测量爆高的新机理和测量模型,依据核爆炸双光峰的物理特性,巧妙地给出了近似解,得到良好的估测爆高结果,并作出图形显示。估算爆高的最大绝对误差为33m,对实际爆高相对误差小于6%。     

机车车辆故障与可靠性分析

论述了机车车辆故障的基本概念 ,包括故障的定义和国内外对机车车辆故障的规定以及故障严重程度的分类。介绍了故障模式、故障机理及故障分析方法 ,包括图示法、FMEA法及故障风险分析。     

对闭路电视监视系统在铁路中应用的思考

闭路电视监视系统构建按照统筹规划、总体考虑、优化设计、充分利用既有资源的原则。     

The relationship between land use and intrazonal trip making behaviors: Evidence and implications

This paper addresses the relationship between land use, destination selection, and travel mode choice. Specifically, it focuses on intrazonal trips, a sub-category of trip making where both trip origin and trip destination are contained in the same geographic unit of analysis, using data from the 1994 Household Activity and Travel Diary Survey conducted by Portland Metro. Using multinomial logit and binary logistic models to measure travel mode choice and decision to internalize trips, the evidence supports the conclusions that (1) intrazonal trips characteristics suggest mode choice for these trips might be influenced by urban form, which in turn affects regional trip distribution; (2) there is a threshold effect in the ability of economic diversity/mixed use to alter travel behavior; and (3) greater emphasis to destinations within the area where an individual’s home is located needs to be given in trip distribution models.     

德国不来梅物流集团公司汽车物流介绍

介绍德国不来梅物流集团公司的汽车物流公司在整车物流、物流增值服务、零部件和零配件全球配送,以及标准化和信息技术应用等方面的经验。     

人工神经网络在水平管道浆体输送浮游界限速度中的应用

通过分析影响临界流速的几个主要因素 ,应用BP人工神经网络的模型和算法 ,建立了水平管道浆体输送浮游界限速度的预测模型 ,克服了以往所建立的浮游界限速度模型受某些特定条件限制的局限性。与实测资料进行了比较分析 ,结果表明模型基本合理可靠。     

Travel mode choices in small cities of China: A case study of Changting

The existing literature on urban transportation planning in China focuses primarily on large cities and neglects small cities. This paper aims to fill part of the knowledge gap by examining travel mode choice in Changting, a small city that has been experiencing fast spatial expansion and growing transportation problems. Using survey data collected from 1470 respondents on weekdays and weekends, the study investigates the relationship between mode choice and individuals’ socio-economic characteristics, trip characteristics, attitudes, and home and workplace built environments. While more than 35 percent of survey respondents are car owners, walk, bicycle, e-bike, and motorcycle still account for over 85 percent of trips made during peak hours. E-bike and motorcycle are the dominant means of travel on weekdays, but many people shift to walking and cycling on weekends, making non-motorized and semi-motorized travel especially important for non-commuting trips. Results of multinomial logistic regression show that: (1) job-housing balance might exert different effects on mode choice in different types of urban areas; (2) negative attitude towards e-bike and motorcycle is associated with more walking and cycling; and (3) land use diversity of workplace is related to commuting mode choice on weekdays, while land use diversities of both residential and activity places do not significantly affect mode choice on weekends. Our findings imply that planning and design for small cities needs to differentiate land use and transportation strategies in various types of areas, and to launch outreach programs to shift people’s mode choice from motorized travel to walking and cycling.     

光明桥的病害检测和维修加固

梁桥经过拓宽改建,形成了新、老梁体拼接的组合桥。此类桥梁由于新、老梁体的刚度不同及基础沉降原因出现拼接处开裂、错位等病害。以南奉公路光明桥为例,介绍了此类桥梁的检测、分析、病害修复的过程,对桥梁维修后的运行效果进行了跟踪观测。     

Exploring the role of social capital influence variables on travel behaviour

This paper explores the potential role of individual trip characteristics and social capital network variables in the choice of transport mode. A sample of around 100 individuals living or working in one suburb of Madrid (i.e. Las Rosas district of Madrid) participated in a smartphone short panel survey, entering travel data for an entire working week. A Mixed Logit model was estimated with this data to analyze shifts to metro as a consequence of the opening of two new stations in the area. Apart from classical explanatory variables, such as travel time and cost, gender, license and car ownership, the model incorporated two “social capital network” variables: participation in voluntary activities and receiving help for various tasks (i.e. child care, housekeeping, etc.). Both variables improved the capacity of the model to explain transport mode shifts. Further, our results confirm that the shift towards metro was higher in the case of people “helped” and lower for those participating in some voluntary activities.