首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   149篇
  免费   0篇
公路运输   32篇
综合类   6篇
水路运输   44篇
铁路运输   3篇
综合运输   64篇
  2018年   8篇
  2017年   4篇
  2016年   5篇
  2015年   2篇
  2014年   7篇
  2013年   24篇
  2012年   5篇
  2011年   8篇
  2010年   7篇
  2009年   7篇
  2008年   9篇
  2007年   9篇
  2006年   5篇
  2005年   2篇
  2003年   6篇
  2002年   3篇
  2000年   1篇
  1999年   3篇
  1998年   7篇
  1997年   3篇
  1996年   2篇
  1995年   1篇
  1993年   3篇
  1991年   2篇
  1988年   1篇
  1987年   1篇
  1985年   1篇
  1984年   1篇
  1981年   1篇
  1980年   2篇
  1977年   3篇
  1976年   1篇
  1975年   3篇
  1974年   1篇
  1972年   1篇
排序方式: 共有149条查询结果,搜索用时 0 毫秒
91.
    
Abstract

Nationwide Transport Surveys and Time‐Use Surveys both reflect the daily agendas and schedules of the reporting individuals and should therefore yield comparable indicators of travel behaviour; for instance: immobility rate (share of persons not leaving the home on any one day), daily travel time, and number of trips per day. These two surveys exist in three countries from the same time period: Belgium, France, Great Britain. The comparisons demonstrate that they tell parallel stories, but that the levels of the variables are significantly different with lower immobility rates and longer travel times reported in the Time‐Use Surveys. These surveys should therefore be integrated in the analysis of travel behaviour analysis as a crucial yardstick. In Europe, where Nationwide Travel Surveys are intermittent and not harmonized, the harmonised Time‐Use Surveys allow for crucial European‐wide comparisions across time and space.  相似文献   
92.
    
Abstract

To date, most empirical studies have applied cross-sectional designs to investigate the relationship between the built environment (BE) and travel behaviour (TB). Since these studies cannot identify causal influence, the use of designs that provide data on multiple moments in time seems necessary. This article classifies these designs and describes how they can be applied to identify causality in this relationship. We recommend the use of natural experiments to assess the impact of changes in land use/infrastructure and prospective longitudinal designs to assess the impact of residential or job moves. In addition, the role of the BE can be explored by assessing the impact of (1) deliberate TB change experiments and (2) changes in household circumstances across different spatial contexts over time. The use of randomised experimental designs is recommended for the former and prospective longitudinal designs for the latter. The article concludes with an outlook on future research.  相似文献   
93.
Governments in their port reform efforts have experimented with liberalization and commercialization to improve port operations. Because of their failure to meet expectations or because of changing competitive environments, these options have generally been discarded in favour of privatization. In mature large-volume port systems, privatization was a relatively obvious solution, because interport or interterminal competition would be achieved to the extent that the monopolistic tendencies characteristic of their predecessor organizations would cease to exist. In countries with a limited number of ports having relatively small cargo volumes, however, the case is quite different. These countries would have to pursue strategies that would still induce competition in spite of their limited cargo volumes if they hoped to achieve the same privatization benefits and market disciplines enjoyed in other countries. This article examines the port reform approaches used in three distinct competitive settings;the experiences in these countries offer some guidance on how to assure that ports will feel competitive pressures even under conditions of limited cargo volumes.  相似文献   
94.
2010美国市场新车技术预览(下)   总被引:1,自引:0,他引:1  
本文译自美国《MOTOR》杂志。上期介绍了美国国内汽车制造厂2010年推出的新款车型,本期将介绍国外汽车厂家2010年推向美国市场的主要新款车。  相似文献   
95.
The notion of operating and maintenance manuals being validated as fit for purpose is based largely on conjecture, as causal factors contributing to rule-based (procedure-based) human error at sea are under-theorised and under-researched. Human factors theories offer little in terms of framework as to the constitution of a bad rule. In this study, an original equipment manufacturer (OEM) operating and maintenance manual was assessed against two rule-based error-provoking markers identified through literature review. The contribution of the original and subsequently modified OEM operating and maintenance manuals towards both behaviour modification and rule-based error was assessed through a workshop-based study. Randomly selected seafaring participants were tasked with the responsibility of executing a typical shipboard operational procedure by referring to an original or modified version of the manual. The study supported the following hypotheses: (1) the hierarchical access structure of headings in an operating and maintenance manual supports the primary function of selection, and (2) the efficacy of inference in a procedure-based task is dependent upon the spatial contiguity of corresponding text and illustrations in an operating and maintenance manual. The findings of this study suggest that a nexus exists between the structure of operating and maintenance manuals, behaviour modification and human error. Furthermore, this study demonstrates a need for further research into specific causal factors contributing towards rule-based error in shipboard operating and maintenance tasks.  相似文献   
96.
本文介绍美国汽车市场上的从欧洲、亚洲进口的最新车型,以便我们了解美国汽车市场的最新动态。 基于轿车基础上的越野车型的市场(指美国市场)已经形成,汽车厂商们便纷纷对原有车型进行改进并不断推出新车型以满足市场的需求。因此,2008年出现了很多全新的此类进口车型。  相似文献   
97.
Editorial     
  相似文献   
98.
A model of driver's route choice behavior under advanced traveler information system (ATIS) is developed based on data collected from learning experiments using interactive computer simulation. The experiment subjected drivers to 32 simulated days in which they were to choose between the freeway or a side road. A neural network model is used as a convenient modeling technique in this initial phase of the analysis. The results indicated that most subjects made route choices based mainly on their recent experiences. It was also demonstrated that route choice behaviors are related to the personal characteristics as well as the characteristics of the respective routes. Travel experiences have less effect on the choice of the side road compared to the freeway and the results indicate that the prediction accuracy of the model, the acceptance rate of advice, and the quality of advice are closely correlated. The model developed here was for advice consistently provided at a level of 75 percent accuracy. The paper concludes with a discussion of experimental limitations and suggestions for future research.  相似文献   
99.
Editorial     
  相似文献   
100.
BRT appears to be less expensive to build and operate than tram systems but can it really approach the performance level of a tram system and what is the environmental performance of comparable systems?  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号