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   10953篇
  免费   116篇
  国内免费   9篇
教育   7417篇
科学研究   1383篇
各国文化   135篇
体育   762篇
综合类   6篇
文化理论   101篇
信息传播   1274篇
  2020年   135篇
  2019年   187篇
  2018年   223篇
  2017年   258篇
  2016年   231篇
  2015年   153篇
  2014年   224篇
  2013年   2203篇
  2012年   191篇
  2011年   189篇
  2010年   154篇
  2009年   173篇
  2008年   205篇
  2007年   196篇
  2006年   181篇
  2005年   150篇
  2004年   134篇
  2003年   131篇
  2002年   125篇
  2001年   139篇
  2000年   156篇
  1999年   132篇
  1998年   94篇
  1997年   87篇
  1996年   100篇
  1995年   84篇
  1994年   104篇
  1993年   112篇
  1992年   146篇
  1991年   151篇
  1990年   148篇
  1989年   161篇
  1988年   129篇
  1987年   140篇
  1986年   151篇
  1985年   163篇
  1984年   156篇
  1983年   156篇
  1982年   122篇
  1981年   132篇
  1980年   111篇
  1979年   150篇
  1978年   155篇
  1977年   109篇
  1976年   111篇
  1975年   101篇
  1974年   86篇
  1973年   101篇
  1972年   86篇
  1971年   81篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
A brief commentary from the Museum Association of New York (MANY) on the unprecedented gap posed by baby-boomer retirement. Based, in part, on MANY's white paper, “Who's Next? Questioning the Future of Museum Leadership in New York State,” this essay deals with questions of succession, leadership and general differences in New York's museum community.  相似文献   
62.
Editorial     
This issue of the Journal contains three interesting articlesabout central aspects of public opinion research, as well asan equal number of research notes that reflect the range oftopics that interest all public opinion researchers. Toshio Takeshita takes a turn at reconceptualizing agenda-settingstudies, using a taxonomy  相似文献   
63.
In this essay, we respond to the narratives and essays in this issue by examining organizational power issues related to researchers and institutional research boards (IRBs). Rather than taking a singular perspective on power, we use multiple perspectives and suggest that the cumulative analyses provide the best understanding of IRBs and organizational power.  相似文献   
64.
Analysis of Statistical Question Classification for Fact-Based Questions   总被引:1,自引:0,他引:1  
Question classification systems play an important role in question answering systems and can be used in a wide range of other domains. The goal of question classification is to accurately assign labels to questions based on expected answer type. Most approaches in the past have relied on matching questions against hand-crafted rules. However, rules require laborious effort to create and often suffer from being too specific. Statistical question classification methods overcome these issues by employing machine learning techniques. We empirically show that a statistical approach is robust and achieves good performance on three diverse data sets with little or no hand tuning. Furthermore, we examine the role different syntactic and semantic features have on performance. We find that semantic features tend to increase performance more than purely syntactic features. Finally, we analyze common causes of misclassification error and provide insight into ways they may be overcome.  相似文献   
65.
66.
This Australian study establishes a model that provides a foundation for communication channels and tools selection by agencies in the post-warning response phase of a disaster. The model, developed from disaster and information seeking literature, attempts to predict information source and channel selection by people after their community has received a warning for a disaster. It provides the coding framework for analysis of 51 semi-structured interviews with disaster-affected Australians. The interviews tested the model for accommodation of channels and sources that people chose, found most useful, and used most in bushfire, slow flood, flash flood, and cyclone situations. The order of initial sources was investigated and preliminary information seeking pathways established across disaster types. The disaster information seeking model supports this investigation of information seeking behaviour, though improvements are suggested. The resulting model could guide agency response communication for different disaster types.  相似文献   
67.
Increased genetic testing in personalized medicine presents unique challenges for couples, including managing disease risk and potential discrimination as a couple. This study investigated couples’ conflicts and support gaps as they coped with perceived genetic discrimination. We also explored the degree to which communal coping was beneficial in reducing support gaps and ultimately stress. Dyadic analysis of married adults (N?=?266, 133 couples), in which one person had the genetic risk for serious illness, showed that perceived discrimination predicted more frequent conflicts about alpha-1 antitrypsin deficiency-related treatment, privacy boundaries, and finances, which, in turn, predicted wider gaps in emotion and esteem support, and greater stress for both spouses. Communal coping predicted lower support gaps for both partners and marginally lower stress.  相似文献   
68.
69.
What If?     
  相似文献   
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