全文获取类型
收费全文 | 2123篇 |
免费 | 70篇 |
国内免费 | 1篇 |
专业分类
教育 | 1612篇 |
科学研究 | 118篇 |
各国文化 | 34篇 |
体育 | 141篇 |
综合类 | 1篇 |
文化理论 | 16篇 |
信息传播 | 272篇 |
出版年
2023年 | 14篇 |
2022年 | 21篇 |
2021年 | 42篇 |
2020年 | 68篇 |
2019年 | 101篇 |
2018年 | 121篇 |
2017年 | 124篇 |
2016年 | 96篇 |
2015年 | 56篇 |
2014年 | 91篇 |
2013年 | 491篇 |
2012年 | 61篇 |
2011年 | 60篇 |
2010年 | 53篇 |
2009年 | 54篇 |
2008年 | 49篇 |
2007年 | 54篇 |
2006年 | 36篇 |
2005年 | 43篇 |
2004年 | 40篇 |
2003年 | 15篇 |
2002年 | 42篇 |
2001年 | 21篇 |
2000年 | 17篇 |
1999年 | 16篇 |
1998年 | 21篇 |
1997年 | 15篇 |
1996年 | 16篇 |
1995年 | 11篇 |
1994年 | 13篇 |
1993年 | 12篇 |
1992年 | 17篇 |
1991年 | 16篇 |
1990年 | 16篇 |
1989年 | 10篇 |
1988年 | 13篇 |
1987年 | 7篇 |
1986年 | 8篇 |
1985年 | 8篇 |
1984年 | 8篇 |
1983年 | 8篇 |
1982年 | 11篇 |
1981年 | 8篇 |
1980年 | 7篇 |
1979年 | 10篇 |
1978年 | 15篇 |
1977年 | 11篇 |
1976年 | 11篇 |
1974年 | 7篇 |
1970年 | 7篇 |
排序方式: 共有2194条查询结果,搜索用时 15 毫秒
91.
Christian Swann Lee Crust Patricia Jackman Stewart A. Vella Mark S. Allen Richard Keegan 《Journal of sports sciences》2017,35(23):2272-2280
Clutch performance is improved performance under pressure. However, little research has examined the psychological state experienced by athletes in these situations. Therefore, this study qualitatively examined the subjective experience underlying clutch performance across a range of sports (e.g., team, individual) and standards (Olympic to recreational athletes). Sixteen athletes (Mage = 27.08 years; SD = 6.48) took part in in-depth, semi-structured interviews primarily after an exceptional performance (M = 4.38 days later; SD = 3.14). Data were analysed inductively and thematically. Clutch states involved 12 characteristics, including heightened and deliberate concentration, intense effort, and heightened awareness, which distinguished the experience of clutch from other optimal psychological states such as flow. Other characteristics, such as perceptions of control, were also reported and supported previous experimental research on clutch. These findings present in-depth qualitative insights into the psychological state underlying clutch performance, and are discussed in relation to the existing literature on optimal psychological states in sport. 相似文献
92.
93.
R M Allen 《Exceptional children》1969,35(9):748-749
95.
96.
97.
Kerr R Ness K 《Sports biomechanics / International Society of Biomechanics in Sports》2006,5(1):47-61
The aims of the study were to determine those variables that significantly affect push-in execution and thereby formulate coaching recommendations specific to the push-in. Two 50 Hz video cameras recorded transverse and longitudinal views of push-in trials performed by eight experienced and nine inexperienced male push-in performers. Video footage was digitized for data analysis of ball speed, stance width, drag distance, drag time, drag speed, centre of massy displacement and segment and stick displacements and velocities. Experienced push-in performers demonstrated a significantly greater (p < 0.05) stance width, a significantly greater distance between the ball and the front foot at the start of the push-in and a significantly faster ball speed than inexperienced performers. In addition, the experienced performers showed a significant positive correlation between ball speed and playing experience and tended to adopt a combination of simultaneous and sequential segment rotation to achieve accuracy and fast ball speed. The study yielded the following coaching recommendations for enhanced push-in performance: maximize drag distance by maximizing front foot-ball distance at the start of the push-in; use a combination of simultaneous and sequential segment rotations to optimise both accuracy and ball speed and maximize drag speed. 相似文献
98.
99.
100.