首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1830篇
  免费   38篇
  国内免费   31篇
教育   1299篇
科学研究   203篇
各国文化   16篇
体育   97篇
综合类   47篇
文化理论   23篇
信息传播   214篇
  2023年   12篇
  2022年   38篇
  2021年   63篇
  2020年   66篇
  2019年   80篇
  2018年   123篇
  2017年   95篇
  2016年   96篇
  2015年   78篇
  2014年   92篇
  2013年   285篇
  2012年   93篇
  2011年   102篇
  2010年   81篇
  2009年   96篇
  2008年   85篇
  2007年   84篇
  2006年   64篇
  2005年   52篇
  2004年   37篇
  2003年   22篇
  2002年   26篇
  2001年   27篇
  2000年   15篇
  1999年   4篇
  1998年   10篇
  1997年   4篇
  1996年   3篇
  1995年   4篇
  1994年   6篇
  1993年   5篇
  1992年   7篇
  1991年   7篇
  1990年   6篇
  1989年   3篇
  1988年   3篇
  1987年   3篇
  1977年   1篇
  1976年   2篇
  1972年   2篇
  1971年   2篇
  1970年   1篇
  1969年   1篇
  1966年   1篇
  1964年   2篇
  1962年   1篇
  1961年   1篇
  1960年   1篇
  1957年   1篇
  1933年   2篇
排序方式: 共有1899条查询结果,搜索用时 31 毫秒
1.
2.
ABSTRACT

The aim of this study was to compare the effects of 20 min neuromuscular training with a programme of 10 min in youth football players. 342 (15.4 ± 1.7 years) male football players from 18 teams were included, and cluster-randomized by team into two intervention groups. Both groups performed an injury prevention programme twice a week over five months using the same exercises but a different duration. The first intervention group (INT10, n = 175) performed the programme for 10 min, the second intervention group (INT20, n = 167) for 20 min. Primary outcomes were lower extremity (LE) injuries. Secondary outcomes were injury type, severity, mechanism and compliance to the intervention. 13 teams with 185 players were included for final analysis. No significant group difference was found between INT10 (6.37 per 1000 h) and INT20 (7.20 per 1000 h) for the incidence rate ratio of the lower extremities (IRR = 1.03, 95% confidence interval 0.59, 1.79), nor for the distribution of injury location, type, severity or mechanism. The results show that performing preventive exercises for 10 min is no less effective than 20 min in youth football players. Shorter training sessions can, therefore, be effectively used for injury prevention.  相似文献   
3.
International Review of Education - In 2000, the government of the Philippines launched its National Service Training Program (NSTP), a compulsory 2-semester course component for all the...  相似文献   
4.
5.
6.
教育信息化浪潮中,高等教育改革蓬勃发展,国家出台了各种利好政策;在这种大背景下,涌现出一批教育改革"冲浪人",他们在教学一线,亲身实践最新的智慧教学、混合式教学.在本篇学术访谈中,几位教育专家以各自在智慧教学领域中的出色成果为抓手,探讨时下高等教育信息化的热点问题:如何打造国家级精品慕课?如何建设线上线下混合式一流课程?如何将人工智能应用在教学之中?智慧教学环境中教师身份如何转变?每位专家结合实际教学案例分析问题并给出具体策略建议,希望对正在进行教育改革探索的老师们更多启发.  相似文献   
7.
唐诗知识图谱的构建及其智能知识服务设计   总被引:2,自引:0,他引:2  
[目的/意义]立足于当前大数据环境下的唐诗知识服务需求,以大规模唐诗数据为基础构建唐诗知识图谱并提供智能知识服务,推动人工智能环境下唐诗知识管理和知识服务方式的创新。[方法/过程]本文在对领域知识服务需求调研的基础上,设计领域知识服务驱动的唐诗本体模型,然后利用从Web上爬取的多源异构数据,采用知识抽取、知识融合、知识推理等技术自动构建唐诗知识图谱,统一表示和组织唐诗领域数据,实现对大规模唐诗数据的语义化处理。[结果/结论]本文设计基于唐诗知识图谱的智能知识服务平台KnowPoetry,提供唐诗领域的知识探索、时空轨迹、语义查询等智能化知识服务,推动人工智能环境下唐诗数字人文研究方法的创新转型。  相似文献   
8.
ABSTRACT

The recruitment of athletes with limited resources is a global problem in professional sports. In US Major League Baseball, the experience of the Oakland Athletics’ general manager in the last decade turned his “Moneyball” model into a synonym of quantitative analysis in the transfer market of baseball players. His strategy focused on hiring players with outstanding technical skills but relatively low market value. This study adapted this model to the framework of a multiple criteria decision aid (MCDA), by selecting undervalued players who have complementary abilities. The novelty here refers to the joint use of four algorithms explored by the composition of probabilistic preferences (CPP) (i.e., ranking, classification, dynamic evaluation and regularity analysis) and their application to soccer player performance evaluation. The new model analysed the recent transfer of a left-back soccer player to Europe. The results indicated 12 opportunities for better investment, among 32 left and right-back players considered. Two years later, the value of the same player was considerably lower. He played only five matches in the 2018–2019 season, without scoring or providing any assists. On the other hand, the players better classified by the CPP-MB model presented higher performances and market values.  相似文献   
9.
Seventy-nine 3-year olds and their mothers participated in a laboratory-based task to assess maternal hostility. Mothers also reported their behavioral regulation of their child. Seven years later, functional magnetic resonance imaging data were acquired while viewing emotional faces and completing a reward processing task. Maternal hostility predicted more negative amygdala connectivity during exposure to sad relative to neutral faces with frontal and parietal regions as well as more negative left ventral striatal connectivity during monetary gain relative to loss feedback with the right posterior orbital frontal cortex and right inferior frontal gyrus. In contrast, maternal regulation predicted enhanced cingulo-frontal connectivity during monetary gain relative to loss feedback. Results suggest parenting is associated with alterations in emotion and reward processing circuitry 7–8 years later.  相似文献   
10.
Reading and Writing - The original publication of the article contained errors in the tables.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号