全文获取类型
收费全文 | 4775篇 |
免费 | 43篇 |
国内免费 | 10篇 |
专业分类
教育 | 3302篇 |
科学研究 | 382篇 |
各国文化 | 86篇 |
体育 | 479篇 |
综合类 | 12篇 |
文化理论 | 78篇 |
信息传播 | 489篇 |
出版年
2023年 | 19篇 |
2022年 | 31篇 |
2021年 | 79篇 |
2020年 | 117篇 |
2019年 | 184篇 |
2018年 | 254篇 |
2017年 | 231篇 |
2016年 | 204篇 |
2015年 | 125篇 |
2014年 | 166篇 |
2013年 | 1045篇 |
2012年 | 173篇 |
2011年 | 136篇 |
2010年 | 104篇 |
2009年 | 103篇 |
2008年 | 99篇 |
2007年 | 87篇 |
2006年 | 106篇 |
2005年 | 96篇 |
2004年 | 79篇 |
2003年 | 75篇 |
2002年 | 58篇 |
2001年 | 51篇 |
2000年 | 62篇 |
1999年 | 54篇 |
1998年 | 59篇 |
1997年 | 46篇 |
1996年 | 42篇 |
1995年 | 36篇 |
1994年 | 35篇 |
1993年 | 43篇 |
1992年 | 35篇 |
1991年 | 39篇 |
1990年 | 44篇 |
1989年 | 41篇 |
1988年 | 44篇 |
1987年 | 38篇 |
1986年 | 32篇 |
1985年 | 26篇 |
1984年 | 35篇 |
1983年 | 34篇 |
1982年 | 30篇 |
1981年 | 21篇 |
1980年 | 25篇 |
1979年 | 37篇 |
1978年 | 29篇 |
1977年 | 27篇 |
1976年 | 25篇 |
1974年 | 20篇 |
1973年 | 21篇 |
排序方式: 共有4828条查询结果,搜索用时 15 毫秒
21.
This study investigates the convergence of two bibliometric approaches to the measurement of interdisciplinary research: one based on analyzing disciplinary diversity in the reference list of publications, the other based on the disciplinary diversity of authors of publications. In particular we measure the variety, balance, disparity and integrated diversity index of, respectively, single-author, multi-author single-field, and multi-author multi-field publications. We find that, in general, the diversity of the reference list grows with the number of fields reflected in a paper’s authors’ list and, to a lesser extent, with the number of authors being equal the number of fields. Further, we find that when fields belonging to different disciplines are reflected in the authors’ list, the disparity in the reference list is higher than in the case of fields belonging to the same discipline. However, this general tendency varies across disciplines, and noticeable exceptions are found at individual paper level. 相似文献
22.
23.
24.
25.
Bahar Köymen Cathal O’Madagain Andreas Domberg Michael Tomasello 《Child development》2020,91(3):685-693
In collaborative problem solving, children produce and evaluate arguments for proposals. We investigated whether 3- and 5-year-olds (N = 192) can produce and evaluate arguments against those arguments (i.e., counter-arguments). In Study 1, each child within a peer dyad was privately given a reason to prefer one over another solution to a task. One child, however, was given further information that would refute the reasoning of their partner. Five-year-olds, but not 3-year-olds, identified and produced valid and relevant counter-arguments. In Study 2, 3-year-olds were given discourse training (discourse that contrasted valid and invalid counter-arguments) and then given the same problem-solving tasks. After training, 3-year-olds could also identify and produce valid and relevant counter-arguments. Thus, participating in discourse about reasons facilitates children’s counter-argumentation. 相似文献
26.
27.
Emer Van Ryswyk Richard Weeks Laura Bandick Michaela O’Keefe Andrew Vakulin Peter Catcheside 《European Journal of Sport Science》2017,17(2):144-151
Objectives: To improve well-being and performance indicators in a group of Australian Football League (AFL) players via a six-week sleep optimisation programme. Design: Prospective intervention study following observations suggestive of reduced sleep and excessive daytime sleepiness in an AFL group. Methods: Athletes from the Adelaide Football Club were invited to participate if they had played AFL senior-level football for 1–5 years, or if they had excessive daytime sleepiness (Epworth Sleepiness Scale [ESS] >10), measured via ESS. An initial education session explained normal sleep needs, and how to achieve increased sleep duration and quality. Participants (n?=?25) received ongoing feedback on their sleep, and a mid-programme education and feedback session. Sleep duration, quality and related outcomes were measured during week one and at the conclusion of the six-week intervention period using sleep diaries, actigraphy, ESS, Pittsburgh Sleep Quality Index, Profile of Mood States, Training Distress Scale, Perceived Stress Scale and the Psychomotor Vigilance Task. Results: Sleep diaries demonstrated an increase in total sleep time of approximately 20?min (498.8?±?53.8 to 518.7?±?34.3; p?<?.05) and a 2% increase in sleep efficiency (p?<?0.05). There was a corresponding increase in vigour (p?<?0.001) and decrease in fatigue (p?<?0.05). Conclusions: Improvements in measures of sleep efficiency, fatigue and vigour indicate that a sleep optimisation programme may improve athletes’ well-being. More research is required into the effects of sleep optimisation on athletic performance. 相似文献
28.
Thomas A. C. Reydon 《Metascience》2015,24(2):259-264
29.
Paulo Ricardo Pereira Dos Santos Bruno Remígio Cavalcante Andreya Karolyne Dos Santos Vieira Marcos Duarte Guimarães Antônio Marconi Leandro Da Silva Anderson Da Costa Armstrong 《Journal of sports sciences》2020,38(17):1936-1942
ABSTRACT We performed a randomized, controlled trial to analyse the effects of resistance training (RT) on cognitive and physical function among older adults. Fifty participants (mean age 67 years, ~60% woman) were randomly assigned to an RT program or a control group. Participants allocated to RT performed three sets of 10-15RM in nine exercises, three times per week, for 12-weeks. Control group did not perform any exercise. Variables included cognitive (global and executive function) and physical function (gait, mobility and strength) outcomes. At completion of the intervention, RT was shown to have significantly mitigated the drop in selective attention and conflict resolution performance (Stroop test: -494.6; 95%CI: -883.1; ?106.1) and promoted a significant improvement in working memory (digit span forward: -0.6; 95%CI: ?1.0; ?0.1 and forward minus backward: -0.9; 95% CI: ?1.6; ?0.2) and verbal fluency (animal naming: +1.4, 95%CI 0.3, 2.5). No significant between-group differences were observed for other cognitive outcomes. Regarding physical function, at completion of the intervention, the RT group demonstrated improved fast-pace gait performance (?0.3; 95% CI: ?0.6; ?0.0) and 1-RM (+21.4 kg; 95%CI: 16.6; 26.2). No significant between-group differences were observed for other mobility-related outcomes. In conclusion, RT improves cognitive and physical function of older adults. 相似文献
30.