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   13482篇
  免费   172篇
  国内免费   12篇
教育   9443篇
科学研究   1335篇
各国文化   403篇
体育   1007篇
综合类   5篇
文化理论   121篇
信息传播   1352篇
  2021年   111篇
  2020年   169篇
  2019年   254篇
  2018年   310篇
  2017年   360篇
  2016年   312篇
  2015年   232篇
  2014年   275篇
  2013年   2707篇
  2012年   255篇
  2011年   284篇
  2010年   240篇
  2009年   268篇
  2008年   332篇
  2007年   310篇
  2006年   272篇
  2005年   255篇
  2004年   261篇
  2003年   217篇
  2002年   188篇
  2001年   221篇
  2000年   251篇
  1999年   226篇
  1998年   147篇
  1997年   148篇
  1996年   138篇
  1995年   126篇
  1994年   118篇
  1993年   128篇
  1992年   184篇
  1991年   196篇
  1990年   192篇
  1989年   211篇
  1988年   164篇
  1987年   153篇
  1986年   161篇
  1985年   211篇
  1984年   157篇
  1983年   159篇
  1982年   139篇
  1981年   117篇
  1980年   122篇
  1979年   202篇
  1978年   118篇
  1977年   135篇
  1976年   110篇
  1975年   107篇
  1974年   125篇
  1973年   104篇
  1971年   95篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
With the rise of microfluidics for the past decade, there has come an ever more pressing need for a low-cost and rapid prototyping technology, especially for research and education purposes. In this article, we report a rapid prototyping process of chromed masks for various microfluidic applications. The process takes place out of a clean room, uses a commercially available video-projector, and can be completed in less than half an hour. We quantify the ranges of fields of view and of resolutions accessible through this video-projection system and report the fabrication of critical microfluidic components (junctions, straight channels, and curved channels). To exemplify the process, three common devices are produced using this method: a droplet generation device, a gradient generation device, and a neuro-engineering oriented device. The neuro-engineering oriented device is a compartmentalized microfluidic chip, and therefore, required the production and the precise alignment of two different masks.  相似文献   
82.
Editorial     
B. Sury 《Resonance》2017,22(5):431-432
  相似文献   
83.
84.
85.
This article describes a study that aimed to answer the following question: ‘Will a programme of professional development in the area of special and inclusive education be effective in achieving attitudinal shift in teachers?’ Forty‐eight teachers who were enrolled on a Master's programme in Special and Inclusive Education were surveyed via a questionnaire at the beginning and end of a ten‐week introductory module. The results indicated overall attitudinal shift and attitudinal shift for four categories of inclusion to suggest more positive attitudes at the end of the module, compared with at the beginning. The implications for providers of pre‐ and in‐service education and training courses for teachers are discussed.  相似文献   
86.
ABSTRACT

The aim of the present study was to investigate the existence of a relative age effect (RAE) on physical fitness of preschoolers. Anthropometry and physical fitness were assessed in 3147 children (3–5 years old) using the PREFIT battery. Based on the birth year, participants were divided into 3year groups (3-, 4- and 5-years). Within each year group, 4quarter groups were created: quarter 1, preschoolers born from January to March; quarter 2, from April to June; quarter 3, from July to September; quarter 4, from October to December. The MANCOVA analysis revealed a main effect of year group (Wilks’ λ = 0.383; F10,5996 = 369.64; p < 0.001, ηp 2 = 0.381) and of quarter (Wilks’ λ = 0.874; F15,8276.6 = 27.67; p < 0.001; ηp 2 = 0.044) over the whole battery of tests. To the best of our knowledge, this is the first study to report the existence of RAE at the preschool stage. In general, performance improved as the relative age increased (i.e., those born in quarter 1 performed better than those in the other quarters). Individualization strategies should be addressed within the same academic year not only in elementary or secondary years but also in preschoolers.  相似文献   
87.
88.
This paper considers the changing role of universities in the UK as they respond to an engagement agenda that stipulates a more immersive and visible interaction between academics and the public. It constitutes a survey of attitudes to public engagement in a selection of UK universities drawing on interviews with senior academics with managerial responsibility at the end of 2009. The results of this study reflect a mood of indecision and anxiety among respondents towards a public engagement agenda seen to influence the contours of their professional identities and working lives. The study situates academic accounts that contest the legitimacy of public engagement as a core academic activity and the role of academics in communicating with public groups. Moreover, it reveals a lack of agreement and consistency in the conceptualisation and application of public engagement in higher education contexts, certainly beyond an emergent discourse of research impact.  相似文献   
89.
90.
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