全文获取类型
收费全文 | 2758篇 |
免费 | 172篇 |
专业分类
公路运输 | 462篇 |
综合类 | 1138篇 |
水路运输 | 600篇 |
铁路运输 | 602篇 |
综合运输 | 128篇 |
出版年
2024年 | 2篇 |
2023年 | 19篇 |
2022年 | 45篇 |
2021年 | 72篇 |
2020年 | 54篇 |
2019年 | 47篇 |
2018年 | 59篇 |
2017年 | 53篇 |
2016年 | 73篇 |
2015年 | 90篇 |
2014年 | 165篇 |
2013年 | 140篇 |
2012年 | 222篇 |
2011年 | 238篇 |
2010年 | 202篇 |
2009年 | 190篇 |
2008年 | 165篇 |
2007年 | 243篇 |
2006年 | 274篇 |
2005年 | 168篇 |
2004年 | 121篇 |
2003年 | 75篇 |
2002年 | 63篇 |
2001年 | 57篇 |
2000年 | 25篇 |
1999年 | 8篇 |
1998年 | 11篇 |
1997年 | 8篇 |
1996年 | 5篇 |
1995年 | 6篇 |
1994年 | 8篇 |
1993年 | 5篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 8篇 |
1989年 | 2篇 |
排序方式: 共有2930条查询结果,搜索用时 0 毫秒
951.
This paper develops a comprehensive approach to the definition of transportation analysis zones (TAZ), and therein, presents
a new methodology and algorithm for the definition of TAZ embedded in geographic information systems software, improves the
base algorithm with several local algorithms, and comprehensively analyses the obtained results. The results obtained are
then compared to these presently used in the transportation analysis process of the Lisbon Metropolitan Area. The proposed
algorithm presents a new methodology for TAZ design based on a smoothed density surface of geocoded travel demand data. The
algorithm aims to minimise the loss of information when moving from a continuous representation of the origin and destination
of each trip to their discrete representations through zones, and focuses on the trade-off between the statistical precision,
geographical error, and the percentage of intra-zonal trips of the resulting OD matrix. The results for the Lisbon Metropolitan
Area case study suggest a significant improvement in OD matrix estimates compared to current transportation analysis practises
based on administrative units.
Luis M. Martínez is a Civil Engineer from the Instituto Superior Técnico, Technical University of Lisbon since 2004. After finishing his degree, he started his work as researcher in the CESUR (Civil Engineering & Architecture Department—Instituto Superior Técnico) where he has been working since. In 2006 he completed his Master Thesis at Instituto Superior Técnico on Traffic Analysis Zones modeling and started his PhD studies on the theme: Metropolitan Transportation Systems Financing Using the Value Capture Concept. José Manuel Viegas is Full Professor of Transportation at the Civil Engineering & Architecture Department of the Instituto Superior Técnico, Technical University of Lisbon. He has worked extensively in Modeling, Innovation and Policy in several types of Transport Systems. He was founder and first Director General of Transportnet, a group of eight leading European Universities with Advanced Studies in Transportation, and currently leads the Portuguese side of the Transportation Systems area in the MIT—Portugal program. Elisabete A. Silva is at the University of Cambridge (University Lecturer in Planning at the Department of Land Economy and a Fellow of Robinson College). With more than 100 contributions in peer review journals, books/books chapters, conference proceedings, and a research track record of approximately 16 years, (both at the public and private sector), her research interests are centred on the application of new technologies to spatial planning in particular city and metropolitan dynamic modelling through time. 相似文献
Elisabete A. SilvaEmail: |
Luis M. Martínez is a Civil Engineer from the Instituto Superior Técnico, Technical University of Lisbon since 2004. After finishing his degree, he started his work as researcher in the CESUR (Civil Engineering & Architecture Department—Instituto Superior Técnico) where he has been working since. In 2006 he completed his Master Thesis at Instituto Superior Técnico on Traffic Analysis Zones modeling and started his PhD studies on the theme: Metropolitan Transportation Systems Financing Using the Value Capture Concept. José Manuel Viegas is Full Professor of Transportation at the Civil Engineering & Architecture Department of the Instituto Superior Técnico, Technical University of Lisbon. He has worked extensively in Modeling, Innovation and Policy in several types of Transport Systems. He was founder and first Director General of Transportnet, a group of eight leading European Universities with Advanced Studies in Transportation, and currently leads the Portuguese side of the Transportation Systems area in the MIT—Portugal program. Elisabete A. Silva is at the University of Cambridge (University Lecturer in Planning at the Department of Land Economy and a Fellow of Robinson College). With more than 100 contributions in peer review journals, books/books chapters, conference proceedings, and a research track record of approximately 16 years, (both at the public and private sector), her research interests are centred on the application of new technologies to spatial planning in particular city and metropolitan dynamic modelling through time. 相似文献
952.
《运输规划与技术》2012,35(8):825-847
ABSTRACTIn recent years, public transport has been developing rapidly and producing large amounts of traffic data. Emerging big data-mining techniques enable the application of these data in a variety of ways. This study uses bus intelligent card (IC card) data and global positioning system (GPS) data to estimate passenger boarding and alighting stations. First, an estimation model for boarding stations is introduced to determine passenger boarding stations. Then, the authors propose an innovative uplink and downlink information identification model (UDI) to generate information for estimating alighting stations. Subsequently, the estimation model for the alighting stations is introduced. In addition, a transfer station identification model is also developed to determine transfer stations. These models are applied to Yinchuan, China to analyze passenger flow characteristics and bus operations. The authors obtain passenger flows based on stations (stops), bus lines, and traffic analysis zones (TAZ) during weekdays and weekends. Moreover, average bus operational speeds are obtained. These findings can be used in bus network planning and optimization as well as bus operation scheduling. 相似文献
953.
954.
朱强 《广东交通职业技术学院学报》2007,6(4):53-55
随着港航物流企业信息系统研究的不断深入,企业信息系统的建设也就显得越来越重要。在分析国内外港航物流企业信息系统基础上,提出港航物流企业信息系统设计目标,最后采用BPS的思想来构建港航物流企业管理信息系统的体系结构。 相似文献
955.
956.
957.
958.
959.
阐述了电子控制技术与信息技术在汽车中的应用,重点介绍了电子与信息技术在汽车信息化、智能化、网络控制化中的应用与发展趋势.指明信息技术与网络技术应用于汽车,是信息社会发展的必然,是信息社会与智能化社会生活的必然需求. 相似文献
960.
城市轨道交通事故故障应急处置相关问题研究 总被引:9,自引:5,他引:4
研究了城市轨道交通事故故障应急处置的机制及基本原则。应急反应机制和应急处理机制是应急处置机制的重要组成部分。在应急反应机制中,提出建立由高技术支持的轨道交通应急处置信息管理和发布系统,做好信息的采集、处理和发布,实现事故故障预警;在应急处理机制中,构建完整规范的事故故障预案体系,实现预案的及时更新、有效管理、方便学习和考核以及预案效果的评价和仿真。 相似文献