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   3593篇
  免费   75篇
  国内免费   3篇
教育   2602篇
科学研究   202篇
各国文化   75篇
体育   309篇
综合类   3篇
文化理论   43篇
信息传播   437篇
  2023年   18篇
  2022年   27篇
  2021年   60篇
  2020年   84篇
  2019年   128篇
  2018年   202篇
  2017年   209篇
  2016年   172篇
  2015年   122篇
  2014年   151篇
  2013年   802篇
  2012年   124篇
  2011年   127篇
  2010年   100篇
  2009年   108篇
  2008年   103篇
  2007年   93篇
  2006年   71篇
  2005年   68篇
  2004年   76篇
  2003年   59篇
  2002年   62篇
  2001年   38篇
  2000年   56篇
  1999年   33篇
  1998年   38篇
  1997年   35篇
  1996年   33篇
  1995年   37篇
  1994年   35篇
  1993年   37篇
  1992年   19篇
  1991年   17篇
  1990年   31篇
  1989年   17篇
  1988年   20篇
  1987年   21篇
  1986年   15篇
  1985年   17篇
  1984年   22篇
  1983年   14篇
  1982年   13篇
  1981年   17篇
  1980年   15篇
  1979年   11篇
  1978年   11篇
  1977年   8篇
  1974年   9篇
  1973年   7篇
  1972年   7篇
排序方式: 共有3671条查询结果,搜索用时 187 毫秒
101.
102.
Conclusion In this paper we briefly described the current status of research in the field of digital libraries interoperability, mainly with respect to federated data processing such as permitted within the Open Archive Initiative framework. We then presented the CERN Document Server Software suite that is a free software package main-tained by CERN providing an online digital library solution for mid- to large-sized document repositories. The set of CDSware modules was described and the differ-ences with other existing tools briefly mentioned. Finally we have mentioned a typical usage statistics illustrating the scope of grey literature and networked con-ditions of the CERN Document Server. We pointed out that the current trend in grey literature management goes toward institutional repositories build upon the distributed and federated model. Further research is going on within the CDS collaboration in this area, focused particularly on (i) semantic interoperability using ontologies in distributed and federated data processing and (ii) ranking technologies when searching grey literature in OAI compliant repositories.  相似文献   
103.
104.
105.
The coronal and sagittal plane leg movements of 24 experienced male cyclists were assessed using video analysis while cycling on a Kingcycle windload simulator. The cyclists were grouped into those with a history of injury and an asymptomatic group on the basis of self-reported injury status. The ages, cycling experience, competition distances and competition speeds of the two groups were compared using Student's t-test. No significant differences (P < 0.05) were found for any of these variables. The maximum and minimum shank adduction, shank adduction velocities, knee flexion and ankle dorsiflexion values were also compared using Student's t-test. Significant differences were found at the point of maximum adduction (1.9 degrees; P = 0.019) and minimum dorsiflexion (4.9 degrees; P = 0.014). These differences indicated more dorsiflexion and greater abduction on the part of the symptomatic cyclists, supporting previous research that found that cyclists with a history of injury differ from those without a history of injury in the coronal plane leg movement patterns they adopt. Also, the most extreme medial position of the knee relative to the ankle occurred during knee extension. This supports the potential injury mechanism proposed by Francis (1986), which had previously only been examined using coronal plane kinematics.  相似文献   
106.
107.
In today's fast-paced environment, traditional medical reference services alone are not adequate to meet users' information needs. Efforts to find new ways to provide comprehensive service to users, where and when needed, have often included the use of new and developing technologies. This paper describes the experience of an academic health science library in developing and providing an online, real-time reference service. Issues discussed include selecting software, training librarians, staffing the service, and considering the future of the service. Use statistics, question type analysis, and feedback from users of the service and librarians who staff the service, are also presented.  相似文献   
108.
109.
Ten inclusive middle school social studies classes, including 133 general education students, and 24 students with mild disabilities (21 with learning disabilities and 3 with emotional disabilities), were assigned at random to a traditional instruction condition, or an experimental condition involving classwide peer tutoring with specialized materials and parent training. After 18 weeks of instruction, posttest data revealed that students in the experimental condition gained significantly more than students in the traditional instruction condition. These effects were observed on content included in the tutoring intervention, as well as on related content that was taught but not included in the tutoring intervention. Results are discussed within the context of recent research on inclusive secondary content area instruction.  相似文献   
110.
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