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   10169篇
  免费   503篇
  国内免费   5篇
教育   7792篇
科学研究   865篇
各国文化   155篇
体育   727篇
文化理论   41篇
信息传播   1097篇
  2022年   44篇
  2021年   120篇
  2020年   188篇
  2019年   306篇
  2018年   360篇
  2017年   392篇
  2016年   327篇
  2015年   291篇
  2014年   348篇
  2013年   2220篇
  2012年   301篇
  2011年   321篇
  2010年   307篇
  2009年   266篇
  2008年   314篇
  2007年   252篇
  2006年   210篇
  2005年   190篇
  2004年   166篇
  2003年   133篇
  2002年   134篇
  2001年   155篇
  2000年   181篇
  1999年   170篇
  1998年   85篇
  1997年   78篇
  1996年   100篇
  1995年   100篇
  1994年   87篇
  1993年   75篇
  1992年   143篇
  1991年   120篇
  1990年   118篇
  1989年   136篇
  1988年   102篇
  1987年   98篇
  1986年   92篇
  1985年   115篇
  1984年   93篇
  1983年   93篇
  1982年   94篇
  1981年   66篇
  1980年   77篇
  1979年   87篇
  1978年   87篇
  1977年   66篇
  1976年   61篇
  1974年   51篇
  1973年   45篇
  1969年   43篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
971.
972.
We investigate in the context of crowdsourcing how seekers can increase open innovation performance, measured as received solver attention, by making two strategic decisions: selecting innovation tasks that are well suited for crowdsourcing and choosing between the potentials of status signalling through identity disclosure versus enjoying the benefits of anonymity. Drawing on uncertainty reduction theory, we suggest that a well-articulated problem statement reduces uncertainties of potential solvers and increases their willingness to participate. We argue that the ability of seekers to draft high-quality problem statements depends on the distance between the problem domain and their current knowledge stock. An analysis of 637 crowdsourcing projects finds that problem-seeker knowledge distance and received solver attention are curvilinear related such that moderate levels of knowledge distance maximize solver participation. However, high-status seekers who engage in identity-based status signalling are able to benefit from crowdsourcing across all levels of problem-seeker knowledge distance.  相似文献   
973.
The shakeout period after the emergence of a dominant design is very important to technology followers and niche market producers, who need adjust to significant changes in the competitive landscape. We posit that such innovating firms use strategic signals that address technical-, market-, and standards-uncertainty associated with their innovations to communicate with market participants to reduce participants' perceived uncertainties associated with the innovative products. Studying technology followers and niche market producers in the personal computer industry during its 1982–1989 shakeout period, we found that technology followers and niche market producers differ in their use of technical-, market-, and standards-related signals. Additionally, using event study methodology, we find that technology followers' strategic signals have significant positive impacts on both their own and other followers' stock prices. Meanwhile, niche market producers' strategic signals have significant positive impacts on their own stock prices, but not significant impacts on other niche market producers and technology followers' stock prices.  相似文献   
974.
ABSTRACT

We introduce what user analytics can do in the first half of the paper and then illustrate how to do user analytics in the second half. In the current context, user analytics refers to a set of diverse communication research methods on uses and effects of social media. User analytics has evolved from TV ratings research to online user research. The history illustrates what data sources, measures, and analyses can be used for what types of research questions under user analytics. We discuss the similarities of and differences between user analytics and other methods of computational communication research (e.g. content mining and online experiments), and compare the strengths and weaknesses of user analytics with traditional quantitative methods (e.g. survey). Finally, we present an application study of Chinese bloggers to demonstrate how to employ user analytics methods to study the production, consumption, and effects of user-generated content.  相似文献   
975.
976.
977.
Abstract

Interventions aimed at increasing the participation of young people with disabilities in recreational sport have had mixed success. The authors draw on in-depth interviews with representatives from State Sporting Associations, local government officers and volunteers within community sports clubs in Victoria, Australia, to examine why some sports clubs are unable or unwilling to translate policy ambitions into practice. The findings indicate how by framing disability provision as ‘too difficult’, ‘not core business’ and antithetical to competitive success, community sports clubs are able to resist policy ambitions to modify existing structures and develop more inclusive practice. Greater priority needs to be given to transformational inclusion objectives and challenging ableism if clubs are to structurally progress the development of participation opportunities for young people with disabilities.  相似文献   
978.
979.
ABSTRACT

Against the impasse of despair in the public response to the refugee emergency, artistic interventions emerge to offer fleeting significant opportunities for restorative and reparative action. This article takes up conviviality as a conceptual tool to understand artistic interventions to the forced migration and asylum issues that variably aim for healing, empathy, and reflexivity. Drawing on comparative research consisting of interviews of artists in France, the United Kingdom, and the United States and textual analyses of their performances, we discuss specific motivations and diverse representational practices that aim to enact togetherness-in-difference. We discuss the potentials and risks of convivial artistic productions, which we argue produce a politics of endurance that, as Feldman has said, helps “people live better with circumstances they cannot change.”  相似文献   
980.
The present study examines links between civic engagement (voting, volunteering, and activism) during late adolescence and early adulthood, and socioeconomic status and mental and physical health in adulthood. Using nationally representative data from the National Longitudinal Study of Adolescent to Adult Health, a propensity score matching approach is used to rigorously estimate how civic engagement is associated with outcomes among 9,471 adolescents and young adults (baseline Mage = 15.9). All forms of civic engagement are positively associated with subsequent income and education level. Volunteering and voting are favorably associated with subsequent mental health and health behaviors, and activism is associated with more health-risk behaviors and not associated with mental health. Civic engagement is not associated with physical health.  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