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   35121篇
  免费   410篇
  国内免费   16篇
教育   25559篇
科学研究   3405篇
各国文化   242篇
体育   2385篇
综合类   14篇
文化理论   568篇
信息传播   3374篇
  2022年   164篇
  2021年   280篇
  2020年   414篇
  2019年   676篇
  2018年   2953篇
  2017年   2816篇
  2016年   2258篇
  2015年   573篇
  2014年   827篇
  2013年   4898篇
  2012年   880篇
  2011年   1323篇
  2010年   1296篇
  2009年   913篇
  2008年   1184篇
  2007年   1599篇
  2006年   518篇
  2005年   811篇
  2004年   815篇
  2003年   716篇
  2002年   484篇
  2001年   491篇
  2000年   431篇
  1999年   381篇
  1998年   227篇
  1997年   217篇
  1996年   218篇
  1995年   232篇
  1994年   179篇
  1993年   198篇
  1992年   314篇
  1991年   297篇
  1990年   306篇
  1989年   303篇
  1988年   259篇
  1987年   301篇
  1986年   271篇
  1985年   312篇
  1984年   257篇
  1983年   213篇
  1982年   193篇
  1981年   165篇
  1980年   146篇
  1979年   256篇
  1978年   187篇
  1977年   166篇
  1976年   154篇
  1975年   136篇
  1974年   144篇
  1971年   128篇
排序方式: 共有10000条查询结果,搜索用时 156 毫秒
1.
In this paper, the authors discuss their grounded research carried out with teachers about the wellbeing of teachers. They explore the importance of making the concept of wellbeing more intimate and consider hedonic and eudaimonic ways of looking at wellbeing. They present a model of layered reflection which illuminates key factors that have an impact on the wellbeing of teachers.  相似文献   
2.
Research in Higher Education - Given the significant need to increase and diversify graduate enrollments within computing fields, it is vital to understand what shapes students’ pathways to...  相似文献   
3.
ABSTRACT

The aims of this study were to identify profiles of sedentary behaviour (SB) patterns, based on leisure-time self-reported SB modalities (screen, educative, social, and relaxing) and to evaluate changes in these profiles over 2 years among Spanish youth aged 8–18 years. Latent profile analysis (LPA), a data-driven analytic approach, was used to identify groups of boys and girls (n = 1553; 48% girls; mean±SD age: 12.56 ± 2.49 y) with distinct SB profiles using the SB modalities (time/d) as input variables. Latent transition analysis, an extension of LPA that uses longitudinal data, was used to analyse 2-year changes in these profiles. At baseline, four and three SB profiles were found among boys (labelled: screen, educative, social, and relaxing) and girls (labelled: screen/social, educative, and relaxing), respectively. Overall, more girls (range: 48%-67%) had the same profile over time, than boys (40%-52%). Participants with a screen or relaxing SB profile at baseline were more likely to have an educative profile after 2 years. Youth with a social and an educative SB profile at baseline were more likely to transition to profiles characterized by higher screen and social SB, respectively. Using a novel and person-centered approach, this study identified gender-specific SB profiles that were moderately stable over time.  相似文献   
4.
Research in Higher Education - State financial aid grant programs are commonly categorized as either need-based, merit-based, or both, but their initial eligibility requirements include many more...  相似文献   
5.
David Kaldewey 《Minerva》2018,56(2):161-182
This article analyzes the concept of “grand challenges” as part of a shift in how scientists and policymakers frame and communicate their respective agendas. The history of the grand challenges discourse helps to understand how identity work in science and science policy has been transformed in recent decades. Furthermore, the question is raised whether this discourse is only an indicator, or also a factor in this transformation. Building on conceptual history and historical semantics, the two parts of the article reconstruct two discursive shifts. First, the observation that in scientific communication references to “problems” are increasingly substituted by references to “challenges” indicates a broader cultural trend of how attitudes towards what is problematic have shifted in the last decades. Second, as the grand challenges discourse is rooted in the sphere of sports and competition, it introduces a specific new set of societal values and practices into the spheres of science and technology. The article concludes that this process can be characterized as the sportification of science, which contributes to self-mobilization and, ultimately, to self-optimization of the participating scientists, engineers, and policymakers.  相似文献   
6.
7.
Letters     
  相似文献   
8.
9.
10.
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