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   460篇
  免费   16篇
公路运输   112篇
综合类   140篇
水路运输   112篇
铁路运输   86篇
综合运输   26篇
  2024年   2篇
  2022年   2篇
  2021年   7篇
  2020年   7篇
  2019年   4篇
  2018年   3篇
  2017年   8篇
  2016年   3篇
  2015年   6篇
  2014年   14篇
  2013年   18篇
  2012年   29篇
  2011年   50篇
  2010年   31篇
  2009年   35篇
  2008年   37篇
  2007年   55篇
  2006年   63篇
  2005年   31篇
  2004年   20篇
  2003年   16篇
  2002年   16篇
  2001年   9篇
  2000年   2篇
  1999年   3篇
  1998年   2篇
  1996年   1篇
  1988年   2篇
排序方式: 共有476条查询结果,搜索用时 15 毫秒
221.
从分析影响财务报告的环境因素入手,对财务报告的未来发展趋势进行了探讨。  相似文献   
222.
This study analyzes the performances of updating techniques in transferability of mode choice models in developing countries. A model specification, estimated in Ho Chi Minh City, was transferred to Phnom Penh. Naïve transfer and four updating methods associated with small sized samples were used in the transfer process and were evaluated based on statistical perspective and predictive ability. The study also illustrates the problems faced in model transferability development, due to the lack of available and suitable data in Phnom Penh. This lack is strongly related to different methods and structures applied in collecting the data. Simplified approaches to the difficulties are proposed in the study. The results show that updating ASCs, updating both ASCs and scale parameter, and use of combined transfer estimators all produce significant improvement, both statistically and in predictability, in updating the model. The last two methods have proven to be superior to the first method, owing to the inclusion of transfer bias considerations in the estimations. However, small data samples should not have large transfer bias when using combined transfer estimators. It is also concluded that naïvely transferring a model is not recommended, and Bayesian updating should be avoided when transfer bias exists. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   
223.
景彪 《铁道车辆》2011,49(4):40-42,48
针对动车组轮对压装出现的不合格F-S曲线,分析了EN标准动车组轮对压装F-S曲线的正确判定方法,并提出了建议。  相似文献   
224.
农村公路养护体制不健全、责任不落实等管理滞后的问题已影响到农村公路的正常使用、行车安全和长远发展,明显不能适应现代农村经济和公路快速发展的需要。为此为了适应市场运行规律的管理机制,明确责任和权利,文章根据农村公路养护工作的实际情况,介绍了养护体制改革前后的变化。  相似文献   
225.
简要的介绍了近代一种先进的无线通讯技术-蓝牙技术,分析和总结了铁路上众多专业领域对"蓝牙"的需求及应用"蓝牙"的优点,并例证了具体应用的可行性,提出了对铁路应用这一技术的建议.  相似文献   
226.
AutoCAD环境下表面粗糙度标注的方法研究   总被引:3,自引:0,他引:3  
介绍了几种充分利用AutoCAD二次开发的工具,自动、快速标注零件图中表面粗糙度的方法与技巧.  相似文献   
227.
228.
Activity-based modelling approaches require a typical survey instrument which can collect the finer details of activities of each individual over both time and space. This paper focuses on the design of a new survey instrument called an activity-travel diary; examines its method of administration; and analyses activity-travel behaviour in the context of developing countries. The Mumbai Metropolitan Region in India is selected as the study area. With the aim of understanding the activities of each individual over a period of time, a pilot survey was conducted in a continuous time frame for a period of 15 days, followed by a main survey. The analysis of data collected by the instrument reveals some interesting facts regarding the relationships between socioeconomic attributes, activities and trip making behaviour. Identification of interactions among households and other members were also facilitated by the newly designed diary, which is not a well-versed topic for research in the context of a developing economy like Mumbai's.  相似文献   
229.
考虑到三沙市特殊的战略位置,提出在三沙市规划建设集维权、开发和保护等为一体的人工岛的建议。阐述该项目规划建设的必要性和紧迫性。从建设物流补给综合交通枢纽等 4 个方面,提出人工岛的功能布局设想。提出科学统筹规划、循序分期实施的策略,并提出若干建议,可供参考。  相似文献   
230.
Abstract

Despite the proliferation of bus rapid transit (BRT) systems over the past few decades across developed and developing world cities, the impacts across these systems on the urban spatial development and property markets have not been comprehensively studied. The current paper attempts to fill this gap in the literature by reviewing the methodologies, underlying theories, and findings presented in the individual academic studies on BRT land-use and price impacts, mostly drawing on those that have focused on Latin American and Asian systems. The review shows that the land-use and value impacts have been less uniform across systems compared to such operational performance metrics as speed and travel time improvements. While predominantly relying on cross-sectional modeling techniques, the approaches used to evaluate land-use changes induced by the transit systems are not uniform either, with only some studies explicitly measuring changes in types of land use as opposed to simply land or rental price. The study also concludes that more rigorous evaluation is needed as to whether the BRT systems have improved accessibility for the populations that inhabited the corridors previously or whether, instead, the desired land value increases have in fact resulted in significant population displacement.  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