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   953篇
  免费   71篇
  2023年   7篇
  2022年   3篇
  2021年   6篇
  2020年   21篇
  2019年   42篇
  2018年   47篇
  2017年   57篇
  2016年   52篇
  2015年   37篇
  2014年   26篇
  2013年   212篇
  2012年   30篇
  2011年   38篇
  2010年   34篇
  2009年   29篇
  2008年   37篇
  2007年   25篇
  2006年   20篇
  2005年   15篇
  2004年   19篇
  2003年   17篇
  2002年   26篇
  2001年   19篇
  2000年   15篇
  1999年   11篇
  1998年   14篇
  1997年   15篇
  1996年   6篇
  1995年   7篇
  1994年   6篇
  1993年   11篇
  1992年   6篇
  1991年   5篇
  1990年   10篇
  1989年   4篇
  1988年   10篇
  1987年   9篇
  1986年   3篇
  1985年   10篇
  1984年   6篇
  1983年   8篇
  1982年   9篇
  1981年   4篇
  1980年   7篇
  1979年   5篇
  1978年   5篇
  1977年   5篇
  1975年   5篇
  1974年   2篇
  1970年   2篇
排序方式: 共有1024条查询结果,搜索用时 15 毫秒
81.
In 1817, Great Britain and the United States concluded the Rush–Bagot Agreement to prevent a naval arms race on the Great Lakes. Despite frequent transgressions to the agreement, by the 1920s, the agreement was heralded internationally as a model to emulate. The predominant scholarly focus on the agreement in the nineteenth century fails to explain why a broken agreement in one century was praiseworthy in the next. This article argues that the twentieth-century narrative of the agreement is of critical important to explaining the agreement’s impact on Canada–US relations. Through the lens of three stages of Canadian political leadership, this article demonstrates that the Rush-Bagot Agreement shifted from a rigid compact to a symbolic agreement that not only reflected but aided the transition toward one of the most unique security relationships. The article concludes that this extant agreement reinforces the prevalent notion of the “undefended border” in Canada–US relations.  相似文献   
82.
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   
83.
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   
84.
85.
86.
87.
88.
89.
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   
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