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   1218篇
  免费   52篇
  2023年   14篇
  2021年   6篇
  2020年   20篇
  2019年   41篇
  2018年   38篇
  2017年   63篇
  2016年   65篇
  2015年   25篇
  2014年   36篇
  2013年   330篇
  2012年   46篇
  2011年   40篇
  2010年   37篇
  2009年   40篇
  2008年   35篇
  2007年   30篇
  2006年   18篇
  2005年   12篇
  2004年   25篇
  2003年   14篇
  2002年   19篇
  2001年   17篇
  2000年   15篇
  1999年   21篇
  1998年   11篇
  1997年   11篇
  1996年   10篇
  1995年   15篇
  1994年   9篇
  1993年   9篇
  1992年   8篇
  1991年   9篇
  1990年   5篇
  1988年   6篇
  1987年   6篇
  1986年   5篇
  1985年   12篇
  1984年   12篇
  1983年   17篇
  1982年   14篇
  1981年   7篇
  1980年   7篇
  1979年   10篇
  1978年   13篇
  1977年   5篇
  1976年   9篇
  1975年   10篇
  1973年   7篇
  1972年   10篇
  1970年   5篇
排序方式: 共有1270条查询结果,搜索用时 171 毫秒
61.
62.
There is much evidence for the parliamentary organisation of the whig junto in Queen Anne's reign, but little for its extra‐parliamentary organisation. This note gives evidence for such extra‐parliamentary organisation late in the reign of William III from letters by both James Vernon and Robert Harley, which describe meetings of the junto and some of its supporters in the country houses of followers in the summers of 1698, 1699 and 1700.  相似文献   
63.
64.
65.
66.
67.
In this paper, we argue that beyond understanding nations as imagined communities, the metaphor of an ‘imagined family’ or ‘filial community’ is a more useful concept towards understanding links between gender and nationhood as family relations in four ways: (1) providing a clear, hierarchical structure; (2) prescribing social roles and responsibilities; (3) being linked to positive affective connotations; and (4) reifying social phenomena as biologically determined. In order to empirically substantiate our claim, we will explore the prevalence and use of family metaphors in a key symbol of nationhood discourses. Through a qualitative analysis of national anthems as ‘mnemonics of national identity’, we demonstrate the widespread presence of family metaphors, discussing how they reproduce ideas of family and gender. Finally, we discuss how the ‘imagined family’ as present in anthems and other forms of national representation could inform future studies of nationalism and national politics.  相似文献   
68.
The Hui-style residence is an important architectural heritage of China. The hollow wall structures are widely used to build its exterior wall system. However, the thermal performance of the hollow wall is no longer able to meet the new energy-saving and environmental requirement. This article describes a laboratory study of the development of foamed mortar (FM), with the potential for use in thermal upgrading of the Hui-style hollow wall system without dramatically changing its traditional structure. The key early age, physical, mechanical and thermal properties were systematically measured. Two extended models were respectively developed to calculate compressive strength and thermal conductivity, as a function of porosity. Environment chamber test was also employed to investigate the effectiveness of this novel thermal upgrading approach and the results show that filling the voids with FM can effectively improve the overall thermal resistance of the hollow wall system by 44%, which is almost equal to the overall thermal resistance when using the more expensive commercial inorganic stucco system. In addition, the combination of these two methods yielded an overall thermal resistance of 0.701 m2·K/W, which is even higher than 0.67 m2·K/W for the code required in the hot summer/cold winter climate zone.  相似文献   
69.
70.
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