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   961篇
  免费   66篇
  2023年   6篇
  2022年   3篇
  2021年   4篇
  2020年   21篇
  2019年   38篇
  2018年   41篇
  2017年   60篇
  2016年   59篇
  2015年   39篇
  2014年   27篇
  2013年   221篇
  2012年   29篇
  2011年   38篇
  2010年   34篇
  2009年   31篇
  2008年   36篇
  2007年   24篇
  2006年   17篇
  2005年   16篇
  2004年   19篇
  2003年   19篇
  2002年   26篇
  2001年   19篇
  2000年   14篇
  1999年   10篇
  1998年   13篇
  1997年   16篇
  1996年   4篇
  1995年   6篇
  1994年   8篇
  1993年   10篇
  1992年   8篇
  1991年   4篇
  1990年   10篇
  1989年   5篇
  1988年   10篇
  1987年   9篇
  1985年   9篇
  1984年   6篇
  1983年   8篇
  1982年   8篇
  1981年   3篇
  1980年   7篇
  1979年   5篇
  1978年   5篇
  1977年   5篇
  1975年   4篇
  1974年   2篇
  1972年   2篇
  1970年   2篇
排序方式: 共有1027条查询结果,搜索用时 15 毫秒
81.
From AD 1274 Chinese emperor Kublai Khan dispatched fleets of ships in a series of attempts to expand the empire's hegemony and extend his rule into East Asia (Japan) and Southeast Asia (Vietnam, Champa and Java). Archaeological remains associated with the fleets and battles have been found at Takashima Island, Japan and on the B?ch Ð?ng River, Vietnam. This paper develops a thematic approach to these sites within a framework of naval battlefield archaeology. It compares the similarities and differences in environmental conditions and archaeological contexts of the two sites in Japan and Vietnam. It also outlines recent archaeological research conducted between 2008 and 2010 on the physical remains at the B?ch Ð?ng River battlefield site.  相似文献   
82.
The dynamic interaction of pile foundations, embedded in a horizontally stratified soil profile, with superstructures under low to moderate earthquake excitation can be handled in different ways. In this article, the soil-pile-superstructure dynamic interaction problem has been investigated using the coupled finite element-boundary element method. Comparison with shaking table experiments of a small scale model pile shows a good correlation with the proposed method in terms of the kinematic response of pile foundations and the structural response. A parametric study of the proposed model has yielded important results essentially concerning the amplification factors of the pile foundation and the superstructure.  相似文献   
83.
84.
85.
86.
87.
88.
This paper explores the usefulness of employing the concept of social capital within a research project investigating the best ways of meeting the health and well‐being needs of young people living in rural Wales. The first part of the paper provides an overview of some of the current research exploring the relationship between social capital, health and young people. The second part provides an overview of findings from an action research project to illustrate how social capital is conceived and applied in this context. It concludes by stating that children and young people do actively generate, draw upon and negotiate their own social capital, and that this is an under‐utilised resource in terms of promoting health and well‐being.  相似文献   
89.
If negotiations produce an end to the Israeli–Palestinian conflict then a sovereign, independent Palestine may emerge. But what is required for it to succeed? Nothing is more important than the security of a Palestinian state–for itself, for Israel, and for the region: security trumps all else. In addition to the problem of dealing effectively with opposition to a peace agreement within Palestine or directed against it from outside, the nature and magnitude of the security challenge will depend in large part on three issues: the drawing of borders between Israel and Palestine–and whether they are porous or marked by a rigid line of barriers; whether Israeli settlements are withdrawn, or in part incorporated into Israel, perhaps through land swaps with Palestine; and what arrangements are made for Jerusalem. One answer is the creation of effective Palestinian military forces (in addition to police), but this course could be divisive; a second is the development of a series of Israeli–Palestinian confidence‐building and share–security measures, including intelligence cooperation; a third is progress towards reducing external threats to Israel–Palestine, including success in Iraq and in defusing other Middle East problems. Most useful, however, would be the creation of an American‐led peace enabling force, ideally modelled on NATO. This force would need to be agreed by both Israel and Palestine; it must be adequately staffed, trained and equipped; its duties and rules of engagement must make sense to all parties; and it must be part of a network of dispute‐resolution and confidence‐building measures in full partnership with Israeli and Palestinian authorities.  相似文献   
90.
Collaborative Watershed Management: A View from the Grassroots   总被引:1,自引:0,他引:1  
To date, research on collaborative watershed management has paid scant attention to the role of grassroots stakeholders, who are the people that actually use natural resources. This article argues cooperation from grassroots stakeholders is necessary for the success of collaborative management, and outlines three theoretical perspectives to explain cooperation. The validity of these theoretical perspectives is tested using a survey of farmer participation in the Suwannee River Partnership in Florida. The findings suggest farmers' perceptions of policy effectiveness are largely driven by economic considerations, whereas participation in collaborative management is linked to social capital.  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