全文获取类型
收费全文 | 14257篇 |
免费 | 227篇 |
国内免费 | 13篇 |
专业分类
教育 | 9904篇 |
科学研究 | 1711篇 |
各国文化 | 127篇 |
体育 | 1053篇 |
综合类 | 17篇 |
文化理论 | 167篇 |
信息传播 | 1518篇 |
出版年
2022年 | 93篇 |
2021年 | 143篇 |
2020年 | 213篇 |
2019年 | 295篇 |
2018年 | 422篇 |
2017年 | 446篇 |
2016年 | 396篇 |
2015年 | 279篇 |
2014年 | 385篇 |
2013年 | 2383篇 |
2012年 | 349篇 |
2011年 | 333篇 |
2010年 | 322篇 |
2009年 | 290篇 |
2008年 | 303篇 |
2007年 | 303篇 |
2006年 | 291篇 |
2005年 | 245篇 |
2004年 | 273篇 |
2003年 | 241篇 |
2002年 | 252篇 |
2001年 | 326篇 |
2000年 | 342篇 |
1999年 | 261篇 |
1998年 | 167篇 |
1997年 | 189篇 |
1996年 | 186篇 |
1995年 | 126篇 |
1994年 | 141篇 |
1993年 | 138篇 |
1992年 | 208篇 |
1991年 | 194篇 |
1990年 | 224篇 |
1989年 | 219篇 |
1988年 | 191篇 |
1987年 | 199篇 |
1986年 | 181篇 |
1985年 | 225篇 |
1984年 | 159篇 |
1983年 | 141篇 |
1982年 | 139篇 |
1981年 | 125篇 |
1980年 | 120篇 |
1979年 | 187篇 |
1978年 | 134篇 |
1977年 | 120篇 |
1976年 | 94篇 |
1975年 | 97篇 |
1974年 | 99篇 |
1973年 | 96篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
S. Donnachie 《Al-Masaq: Islam & the Medieval Mediterranean》2015,27(3):280-282
82.
83.
84.
85.
86.
87.
Based on the studies of Mauss (1935) and Bourdieu (1980) on the determination of body techniques by culture and social background, this study seeks to describe the rules, dispositions and habits specific to different forms of athletic running. It is based on a sample of 732 athletes, all of them are the members of French athletics clubs, comprising 220 sprinters, 213 half-distance runners and 299 long-distance runners. Sports practices are different depending on sub-culture affiliation, sociological characteristics and forms of commitment. This being said, simple links between variables should not be transformed into causal connections. Before drawing such conclusions, it is important to identify the nature of the sport studied. This shows that middle-distance and long-distance enthusiasts, traditionally classified in the same family, have less, in common, than those practising sprint and middle distance. These results potentially question the methodological groups and sociological interpretations made by researchers and sports science. 相似文献
88.
K. S. Yakovlev D. A. Makarov E. S. Baskin 《Scientific and Technical Information Processing》2015,42(5):347-358
In the article we solve path planning task for an agent being multirotor unmanned aerial vehicle (multicopter). We propose an approach of estimating path geometry constraints based on UAV flight dynamics model and control constraints. Than we introduce a new path finding method which takes into consideration those geometry constraints and study this method both theoretically and empirically. 相似文献
89.
90.
Leonardo S. Fortes Dalton De Lima-Junior Lenamar Fiorese José R. A. Nascimento-Júnior Arnaldo L. Mortatti Maria E. C. Ferreira 《Journal of sports sciences》2020,38(5):552-558
ABSTRACTThe objective of this study was to analyse the effect of the use of social networks in smartphones or playing video games on the passing decision-making performance in professional soccer athletes. Participants were 25 male professional soccer athletes (mean ± SD: age 23.4 ± 2.8 years). The participants performed three randomised conditions divided into three groups: control (CON), smartphone (SMA), and video game (VID). Before and after each experimental condition, the Stroop Task assessed the level of induced mental fatigue. Then, the athletes performed a simulated soccer match. A CANON® camera recorded the matches for further analysis on passing decision-making performance. A group effect was identified (p < .01) with impairment on passing decision-making performance for the SMA (p = .01, ES = 0.5) and VID (p = .01, ES = 0.5) conditions. We concluded that the use of social networks on smartphones and/or playing video games right before official soccer matches might impair the passing decision-making performance in professional soccer athletes. 相似文献