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   576篇
  免费   52篇
  2023年   3篇
  2020年   19篇
  2019年   16篇
  2018年   31篇
  2017年   41篇
  2016年   41篇
  2015年   20篇
  2014年   26篇
  2013年   150篇
  2012年   17篇
  2011年   24篇
  2010年   25篇
  2009年   18篇
  2008年   13篇
  2007年   16篇
  2006年   12篇
  2005年   10篇
  2004年   10篇
  2003年   16篇
  2002年   10篇
  2001年   11篇
  2000年   8篇
  1999年   10篇
  1998年   8篇
  1997年   11篇
  1996年   4篇
  1995年   5篇
  1994年   1篇
  1993年   4篇
  1992年   2篇
  1991年   3篇
  1990年   3篇
  1989年   3篇
  1988年   2篇
  1986年   4篇
  1985年   2篇
  1984年   1篇
  1983年   1篇
  1982年   4篇
  1981年   2篇
  1980年   2篇
  1979年   3篇
  1978年   2篇
  1977年   2篇
  1976年   2篇
  1975年   1篇
  1972年   1篇
  1970年   1篇
  1967年   3篇
  1966年   2篇
排序方式: 共有628条查询结果,搜索用时 15 毫秒
11.
Traditional infrastructure evaluation focuses primarily on technical criteria, such as the completion of a designated, interconnected system of facilities or a particular project's capacity to reduce costs borne by suppliers or end users. In the contemporary policymaking environment, however, nontechnical criteria are often of great importance in determining the success or failure of a particular infrastructure enterprise. Institutional considerations, for example, can often delay the implementation of a project or undermine its effectiveness. This paper examines the importance of non-technical criteria in infrastructure evaluation through a case study of the implementation of a major highway investment program in advanced communication and control technologies, known as intelligent vehicle -highway systems (IVHS). The case study focuses on the role of institutional issues as well as environmental issues, in the implementation of IVHS in the US. surface transportation system. The case emphasizes, first, the significance of institutional and environmental issues, and second, mechanisms for evaluating these issues in the context of a major infrastructure investment program.  相似文献   
12.
13.
14.
15.
REVIEW     
The Marquesan Journal of Edward Robarts. 17971824. Pacific History Series No. 6. Edited by Greg. Dening. Australian National University Press, Canberra, 1974. Pp. xvi + 361. Price: $A9.95. To the Pacific and Arctic with Beechey. The Journal of Lieutenant George Peard of H.M.S. ‘Blossom’. 18251828. Hakluyt Society Second Series Volume 143. Edited by Barry M. Gough. At the University Press, Cambridge, 1973. Pp. x + 272, £Stg.11.00.  相似文献   
16.
17.
Secularisation, or the reducing social significance of religion in the twentieth century, has been widely researched in terms of “demand” factors, but less so on the “supply‐side,” considering the contributory effects of the strategies and actions of religious organisations themselves. This article explores these strategies in a group of Anglican churches in South Buckinghamshire in the period leading up to the Second World War, as industrial and population development shifted proportionally to the southeast. This rapid growth and accompanying demographic change posed major challenges to the Church of England, subjecting the parish system to severe pressure. The availability, allocation, and suitability of clergy were a constant concern. The very basis of the Church of England's “offer” to the average citizen — of being the established, national church, there for everyone — seemed under threat: in some places, there was simply no church to “belong” to. Money was in short supply — perhaps both a cause and a symptom of other problems. A general issue was how to reach young people, but a specific concern was the funding of church schools. More widely, the church seemed to be losing touch with the changing cultural and moral landscape in which it operated.  相似文献   
18.
19.
We describe the formulation and application of an integrated general regional seismic loss assessment (RSLA) method for buildings in seismic regions. An efficient method for RSLA is valuable for engineers involved in city planning, risk management, and insurance dealings. In contrast to previously reported methods, the framework presented herein is hazard-based and utilizes a regional rapid seismic hazard deaggregation tool that allows regional assessment to be conducted more efficiently. The proposed technique is implemented as an example to assess general regional seismic loss in Los Angeles County for a ground motion hazard with 10% probability of exceedance in 50 years.  相似文献   
20.
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