全文获取类型
收费全文 | 48816篇 |
免费 | 2770篇 |
国内免费 | 4028篇 |
专业分类
教育 | 31493篇 |
科学研究 | 7713篇 |
各国文化 | 395篇 |
体育 | 5139篇 |
综合类 | 1783篇 |
文化理论 | 335篇 |
信息传播 | 8756篇 |
出版年
2021年 | 322篇 |
2020年 | 726篇 |
2019年 | 1314篇 |
2018年 | 1755篇 |
2017年 | 1917篇 |
2016年 | 1865篇 |
2015年 | 1641篇 |
2014年 | 1708篇 |
2013年 | 7945篇 |
2012年 | 1986篇 |
2011年 | 2293篇 |
2010年 | 2124篇 |
2009年 | 1835篇 |
2008年 | 2292篇 |
2007年 | 1942篇 |
2006年 | 1234篇 |
2005年 | 1107篇 |
2004年 | 1517篇 |
2003年 | 1214篇 |
2002年 | 1266篇 |
2001年 | 974篇 |
2000年 | 932篇 |
1999年 | 777篇 |
1998年 | 535篇 |
1997年 | 604篇 |
1996年 | 594篇 |
1995年 | 545篇 |
1994年 | 473篇 |
1993年 | 451篇 |
1992年 | 580篇 |
1991年 | 524篇 |
1990年 | 509篇 |
1989年 | 566篇 |
1988年 | 534篇 |
1987年 | 485篇 |
1986年 | 459篇 |
1985年 | 528篇 |
1984年 | 445篇 |
1983年 | 472篇 |
1982年 | 382篇 |
1981年 | 354篇 |
1980年 | 334篇 |
1979年 | 458篇 |
1978年 | 363篇 |
1977年 | 307篇 |
1976年 | 332篇 |
1975年 | 271篇 |
1974年 | 276篇 |
1973年 | 250篇 |
1971年 | 231篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
David Sánchez-Oliva Rebecca M. Leech Alberto Grao-Cruces Irene Esteban-Cornejo Carmen Padilla-Moledo Oscar L. Veiga 《Journal of sports sciences》2020,38(9):1062-1069
ABSTRACTThe aims of this study were to identify profiles of sedentary behaviour (SB) patterns, based on leisure-time self-reported SB modalities (screen, educative, social, and relaxing) and to evaluate changes in these profiles over 2 years among Spanish youth aged 8–18 years. Latent profile analysis (LPA), a data-driven analytic approach, was used to identify groups of boys and girls (n = 1553; 48% girls; mean±SD age: 12.56 ± 2.49 y) with distinct SB profiles using the SB modalities (time/d) as input variables. Latent transition analysis, an extension of LPA that uses longitudinal data, was used to analyse 2-year changes in these profiles. At baseline, four and three SB profiles were found among boys (labelled: screen, educative, social, and relaxing) and girls (labelled: screen/social, educative, and relaxing), respectively. Overall, more girls (range: 48%-67%) had the same profile over time, than boys (40%-52%). Participants with a screen or relaxing SB profile at baseline were more likely to have an educative profile after 2 years. Youth with a social and an educative SB profile at baseline were more likely to transition to profiles characterized by higher screen and social SB, respectively. Using a novel and person-centered approach, this study identified gender-specific SB profiles that were moderately stable over time. 相似文献
2.
Research in Higher Education - State financial aid grant programs are commonly categorized as either need-based, merit-based, or both, but their initial eligibility requirements include many more... 相似文献
3.
4.
Supercomplexity and the university: Ronald Barnett and the social philosophy of Higher Education 下载免费PDF全文
Søren S. E. Bengtsen 《Higher Education Quarterly》2018,72(1):65-74
Ronald Barnett's modern classic Realizing the University in an Age of Supercomplexity (published December 1999), has had a crucial impact internationally on the field of Higher Education research and development since the book was published now nearly 20 years ago. Bridging an academic oeuvre across almost 30 years with close to 30 published volumes, Realizing the University in an Age of Supercomplexity plays an important role in the development and transformation of Barnett's social theory of Higher Education into a social philosophy of Higher Education. In the book Barnett performs an important move from a focus on knowledge and epistemology to a focus on being and ontology in relation to Higher Education practices. Barnett shifts his fundamental perspective and view on the relation between universities and the wider society from one of caution and worry to a perspective of hope and vision that fully embraces the future of Higher Education. This way, Realizing the University in an Age of Supercomplexity has not only paved the way for Barnett's own development of a social philosophy of Higher Education, but also contributed invaluably to the rise and maturing of philosophy of Higher Education as a research field in its own right. 相似文献
5.
6.
Young children show social preferences for resource-rich individuals, although few studies have explored the causes underlying such preferences. We evaluate the viability of one candidate cause: Children believe that resource wealth relates to behavior, such that they expect the resource rich to be more likely to materially benefit others (including themselves) than the resource poor. In Studies 1 and 2 (ages 4–10), American children from predominantly middle-income families (n = 94) and Indian children from lower income families (n = 30) predicted that the resource rich would be likelier to share with others than the resource poor. In Study 3, American children (n = 66) made similar predictions in an incentivized decision-making task. The possibility that children's expectations regarding giving contribute to prowealth preferences is discussed. 相似文献
7.
Megan K. Schraedley Hamilton Bean Sarah E. Dempsey Mohan J. Dutta Kathleen P. Hunt Sonia R. Ivancic 《Journal of Applied Communication Research》2020,48(2):166-185
ABSTRACTThis forum brings together food, (in)security, and communication. The authors participating in this forum center communication as both process and tool for understanding, mitigating, and making meaning of food (in)security. The nine authors together discuss the role of communication in food (in)security, the central challenges for scholars and practitioners working on food (in)security, and the creative possibilities and impacts influencing the future of food (in)security. The forum produces a call for applied scholars to re-imagine communication frameworks in order to make meaningful differences in their communities. 相似文献
8.
Javier Horcajo David Santos Joshua J. Guyer Rafael Mateos 《Journal of sports sciences》2020,38(19):2242-2252
ABSTRACT To better understand doping-related attitude change, it is important to consider not only the amount of thinking (i.e., elaboration) done by message recipients, but also the favourability of their thoughts in response to the proposal, as well as the perceived validity in their thoughts. The main goal of the present study was to analyse the effects of a meta-cognitive process (i.e., thought validation) on attitudes related to doping. Thus, we randomly assigned participants to read a message either against or in favour of legalising several doping behaviours. Participants listed their thoughts regarding the proposal and indicated the perceived validity in their thoughts, then reported their attitudes. As hypothesised, the message against legalisation elicited more unfavourable thoughts and attitudes than the message in favour of legalisation. Most relevantly, the effects of the message direction on attitudes were greater for participants with higher (vs. lower) levels of thought validity. Furthermore, consistent with the thought validation process, results revealed that thought favourability was a better predictor of attitudes for participants with higher (vs. lower) perceived thought validity, indicating that perceiving one’s thoughts as valid plays an important role in persuasion. These findings provide novel insights for research and interventions regarding doping in sports. 相似文献
9.
10.
中国竞技体育人力资源相关问题探讨 总被引:5,自引:0,他引:5
对竞技体育人力资源的概念、特点等问题进行了探讨:研究表明,竞技体育人力资源是指竞技体育发展所需人员的现实及潜在禀赋的总和。处于不同层次、不同领域的众多人员组成了竞技体育人力资源系统:竞技人力资源具有稀缺性、目标性、整体性及调控性等特点. 相似文献