全文获取类型
收费全文 | 10169篇 |
免费 | 503篇 |
国内免费 | 5篇 |
专业分类
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 |
出版年
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.
Viet T. Dao 《The Journal of High Technology Management Research》2019,30(1):70-81
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.
ABSTRACTWe 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.
Ruth Jeanes Ramón Spaaij Jonathan Magee Karen Farquharson Sean Gorman Dean Lusher 《Sport in Society》2019,22(6):986-1004
AbstractInterventions 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.
ABSTRACTAgainst 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