全文获取类型
收费全文 | 524篇 |
免费 | 9篇 |
国内免费 | 8篇 |
专业分类
教育 | 372篇 |
科学研究 | 31篇 |
体育 | 75篇 |
综合类 | 50篇 |
文化理论 | 1篇 |
信息传播 | 12篇 |
出版年
2022年 | 3篇 |
2021年 | 4篇 |
2020年 | 4篇 |
2019年 | 8篇 |
2018年 | 2篇 |
2017年 | 2篇 |
2016年 | 8篇 |
2015年 | 8篇 |
2014年 | 33篇 |
2013年 | 34篇 |
2012年 | 38篇 |
2011年 | 37篇 |
2010年 | 22篇 |
2009年 | 23篇 |
2008年 | 35篇 |
2007年 | 37篇 |
2006年 | 48篇 |
2005年 | 35篇 |
2004年 | 37篇 |
2003年 | 28篇 |
2002年 | 26篇 |
2001年 | 23篇 |
2000年 | 21篇 |
1999年 | 7篇 |
1998年 | 3篇 |
1997年 | 3篇 |
1996年 | 6篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1992年 | 2篇 |
排序方式: 共有541条查询结果,搜索用时 15 毫秒
21.
25MW汽轮机组冷态滑参数启动在热电公司尚属首次。通过本次试验摸索出冷态滑参数启动的经验,可有效地指导今后机组的滑启。本文详尽地概述了滑参数启动的必要性、滑启应具备的条件和临时监控措施以及滑启中的具侉操作,分析总结了滑启中存在的问题和影响因素。 相似文献
22.
Trevor N. Simper Cecile Morris Anthony Lynn Ciara O'Hagan Karen Kilner 《运动与健康科学(英文)》2020,9(6):645-650
BackgroundOne-hour postprandial hyperglycemia is associated with increased risk of type 2 diabetes and cardiovascular disease. Physical activity (PA) has short-term beneficial effects on post-meal glucose response. This study compared the oral glucose tolerance test results of 3 groups of people with habitually different levels of PA.MethodsThirty-one adults without diabetes (age 25.9 ± 6.6 years; body mass index 23.8 ± 3.8 kg/m2; mean ± SD) were recruited and divided into 3 groups based on self-reported PA volume and intensity: low activity < 30 min/day of moderate-intensity activity (n = 11), moderately active ≥ 30 min/day of moderate-intensity PA (n = 10), and very active ≥ 60 min/day of PA at high intensity (n = 10). Participants completed an oral glucose tolerance test (50 g glucose) with capillary blood samples obtained at baseline, 15 min, 30 min, 45 min, 60 min, 90 min, and 120 min post-ingestion.ResultsThere were no significant differences between groups for age or body fat percentage or glycated hemoglobin (p > 0.05). The groups were significantly different in terms of baseline glucose level (p = 0.003) and, marginally, for gender (p = 0.053) and BMI (p = 0.050). There was a statistically significant effect of PA on the 1-h postprandial glucose results (p = 0.029), with differences between very active and low activity groups (p = 0.008) but not between the moderately active and low activity groups (p = 0.360), even when baseline glucose level and gender differences were accounted for. For incremental area under the curve there was no significant effect of activity group once gender and body fat percentage had been accounted for (p = 0.401). Those in the low activity group took 15 min longer to reach peak glucose level than those in the very active group (p = 0.012).ConclusionThe results suggest that high levels of PA have a beneficial effect on postprandial blood glucose profiles when compared to low and moderate levels of activity. 相似文献
23.
24.
Pauliina Husu Jaana Suni Kari Tokola Henri Vähä-Ypyä Heli Valkeinen Tomi Mäki-Opas 《Journal of sports sciences》2019,37(16):1840-1848
This cross-sectional study analysed the association of sedentary behaviour (SB) and standing with waist circumference. Finnish adults aged 30-75 years from a sub-sample of population-based Health 2011 Study used a hip-worn tri-axial accelerometer (Hookie AM20, Traxmeet, Ltd, Espoo, Finland) for seven days. Those 1405 participants (57% women) who used accelerometer at least four days, minimum of 10 hours/day, were included. SB and standing were analysed in 6s epochs using validated algorithm. Daily total time, daily number and accumulated time from bouts (30s–5min,30s–10min,30s–15min,30s 30min,>5min,>10min,>15min, >30min) as well as daily number of sit-to-stand transitions were determined. Waist circumference (cm) was measured in standardized way. Participants’ mean age was 52 years (SD 12.2). Mean waist circumference was 97cm (SD 12.3) in men and 87cm (SD 12.7) in women. According to multivariable stepwise linear regression analysis, sit-to-stand transitions [standardised regression coefficient (β)= -0.14, 95%CI -0.20 to -0.09], standing bouts of 30s–5min (β= -0.21, 95%CI -0.26 to -0.15) and number of 30s-30min SB bouts (β=0.12, 95%CI 0.06 to 0.17) were most strongly associated with waist circumference. Besides assessing total SB time, future studies should assess also different bout lengths of SB and sit-to-stand transitions and standing times should be assessed separately. 相似文献
25.
Hui-Ya Chen Hsiao-Yun Chang Yan-Ying Ju Hung-Ting Tsao 《Journal of sports sciences》2017,35(12):1197-1203
Rhythmic gymnasts specialise in dynamic balance under sensory conditions of numerous somatosensory, visual, and vestibular stimulations. This study investigated whether adolescent rhythmic gymnasts are superior to peers in Sensory Organisation test (SOT) performance, which quantifies the ability to maintain standing balance in six sensory conditions, and explored whether they plateaued faster during familiarisation with the SOT. Three and six sessions of SOTs were administered to 15 female rhythmic gymnasts (15.0 ± 1.8 years) and matched peers (15.1 ± 2.1 years), respectively. The gymnasts were superior to their peers in terms of fitness measures, and their performance was better in the SOT equilibrium score when visual information was unreliable. The SOT learning effects were shown in more challenging sensory conditions between Sessions 1 and 2 and were equivalent in both groups; however, over time, the gymnasts gained marginally significant better visual ability and relied less on visual sense when unreliable. In conclusion, adolescent rhythmic gymnasts have generally the same sensory organisation ability and learning rates as their peers. However, when visual information is unreliable, they have superior sensory organisation ability and learn faster to rely less on visual sense. 相似文献
26.
赵勇戈 《体育成人教育学刊》2002,18(2):8-10
在制度和机制创新方面需要采取 5种措施 :即建立依法管理的制度 ,形成校方与教师之间的互动约束力 ;建立竞赛聘任机制 ,增强教师队伍建设的活力 ;建立激励优秀拔尖人才脱颖而出的分配机制 ,形成发挥自身潜能的动力 ;构建教师继续教育制度 ,形成一种提升力 ;建立师德教育和奖励制度 ,形成一种凝聚力 相似文献
27.
本文以大学生足球运动员为实验对象。分试验组和对照组进行了两阶段60天的60米跑“加阻力牵引训练”,经统计分析,可知这种训练法对提高奔跑能力有积极意义。 相似文献
28.
实占姿势是跆拳道(竞技跆拳道以下同)基本技术之一,是跆拳道一切攻防技能的基础,通过对跆拳道实战姿势兀种不同的站立门法进行分类对比,以指导今后的跆拳道的教学和训练。通过分析对比,表明不同的站立方法对跆拳道运动员在比赛中采用何种技、战术有直接影响。 相似文献
29.
30.
Martin K. Klämpfl Philipp B. Philippen Babett H. Lobinger 《Journal of sports sciences》2015,33(7):655-664
The yips is considered a task-specific movement disorder. Its estimated prevalence, however, is high compared to similar neurological movement disorders, possibly resulting from previous studies’ restriction of samples based on skill level, and self-report bias. Alternatively, this high prevalence might be an indication of additional aetiologies, for example the influence of previously played racket sports. We estimated the prevalence of the putting yips across the skill range, using self-reports in one study and a screening test in a second study. We explored if previously played sports matter for the development of the yips. In study 1, yips prevalence (N = 1,306) and golfers’ sports biographies (n = 264) were examined via two online surveys, in which golfers indicated if they were yips-affected. In study 2, golfers (N = 186) putted in a standardised putting test while kinematic and performance measures were recorded. Prevalence was estimated via a kinematic threshold. Sports biographies (n = 119) were obtained via an online survey. Prevalence of currently yips-affected golfers was 22.4% in study 1 and 16.7% in study 2. In both studies, more yips-affected than unaffected golfers had experience in playing racket sports. Yips prevalence remained higher than previously estimated prevalence of other movement disorders but decreased when the whole skill range including professionals and novices was considered. Future studies should use the kinematic screening test instead of self-reports to detect the yips and further investigate the influence of previously played racket sports. 相似文献