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   2410篇
  免费   20篇
  国内免费   2篇
教育   1418篇
科学研究   628篇
各国文化   31篇
体育   109篇
文化理论   21篇
信息传播   225篇
  2021年   15篇
  2020年   23篇
  2019年   52篇
  2018年   57篇
  2017年   55篇
  2016年   36篇
  2015年   34篇
  2014年   58篇
  2013年   506篇
  2012年   44篇
  2011年   47篇
  2010年   32篇
  2009年   41篇
  2008年   40篇
  2007年   32篇
  2006年   37篇
  2005年   39篇
  2004年   49篇
  2003年   39篇
  2002年   32篇
  2001年   30篇
  2000年   28篇
  1999年   24篇
  1998年   17篇
  1997年   18篇
  1996年   25篇
  1995年   18篇
  1994年   16篇
  1993年   27篇
  1991年   18篇
  1990年   23篇
  1989年   22篇
  1988年   31篇
  1987年   21篇
  1986年   20篇
  1985年   18篇
  1982年   17篇
  1981年   20篇
  1978年   21篇
  1977年   16篇
  1930年   20篇
  1929年   28篇
  1928年   33篇
  1927年   32篇
  1926年   31篇
  1925年   53篇
  1924年   33篇
  1923年   35篇
  1920年   28篇
  1868年   15篇
排序方式: 共有2432条查询结果,搜索用时 15 毫秒
51.
In Pavlovian fear conditioning, context-mediated decrements in conditioned responding (e.g., the US preexposure effect) can counteract competition between cues trained together (e.g., overshadowing). Two experiments were conducted using rats in a conditioned lick suppression preparation to determine whether context-mediated competition also counteracts competition between cues trained separately (retroactive interference, or RI). In Experiment 1, a combination of degraded contingency and RI treatments produced less of a decrement in conditioned responding than did either of those treatments alone. Experiment 2 showed that RI treatment attenuates the normally deleterious effect of trial massing. The results suggest that empirical similarities are shared by interference between cues trained apart and competition between cues trained together.  相似文献   
52.
In an effort to provide high-quality preschool education, policymakers are increasingly requiring public preschool teachers to have at least a Bachelor's degree, preferably in early childhood education. Seven major studies of early care and education were used to predict classroom quality and children's academic outcomes from the educational attainment and major of teachers of 4-year-olds. The findings indicate largely null or contradictory associations, indicating that policies focused solely on increasing teachers' education will not suffice for improving classroom quality or maximizing children's academic gains. Instead, raising the effectiveness of early childhood education likely will require a broad range of professional development activities and supports targeted toward teachers' interactions with children.  相似文献   
53.
论证是一个用理由支持观点以及回应其所受攻击的过程.在过去的几十年里,论证已经成为哲学和人工智能研究领域中的一个重要主题.在哲学方面,十九世纪50年代和60年代图尔敏和佩雷尔曼对形式逻辑的批判,促进了非形式逻辑这一学科的产生,它研究推理和论证的非形式模型.在人工智能方面,论证的形式模型也发展成为常识推理和多主体冲突解决的基本模型.本文将讨论后一领域中所研究发展的形式模型如何能够用以澄清一些哲学领域、以及非形式逻辑领域中的理论问题和争议.本文的一个重要观点是,图尔敏和佩雷尔曼时代的形式逻辑只关注数学化的推理,但那些非数学化的推理形式其实同样也能够被形式化.  相似文献   
54.
The purpose of this paper is to compare and contrast characteristics of use and adoption of mobile learning in higher education in developed and developing countries. A comparative case study based on a survey questionnaire was conducted with 189 students (undergraduate and postgraduate) from Makerere University in Uganda and the University of Adelaide in Australia. The Unified Theory of Acceptance and Use of Technology (UTAUT) was employed as the theoretical framework. The results indicated that higher education students in developed and developing countries use a range of technologies for learning, with major differences between Uganda and Australia. The study concludes that mobile learning in higher education in developed and developing country contexts is still at an experimental stage with students using mobile devices in pedagogically limited ways.  相似文献   
55.
This paper describes our efforts to systematically generate knowledge from ethnographic and other qualitative scholarship as a way of bridging intellectual gaps found in quantitative research. We ground this scholarly endeavor in the study of gangs, which has a lengthy history in the field of criminology, yet lacks a coherent, coordinated, and comparative understanding of gang dynamics, behavior, and impacts. We discuss the importance of acknowledging the multiple and mixed methodologies used in gang scholarship and detail the inductive, deductive, and iterative process that helped us (1) develop a comprehensive coding instrument for coding a range of qualitative works, (2) establish the instrument’s inter-rater reliability, and (3) remain cognizant and reflexive about the strengths of both quantitative and qualitative research. Finally, we share the critical yet informative challenges we faced throughout the project and conclude with reflections on why the project was unsuccessful in the way we originally envisioned.  相似文献   
56.
57.
58.
59.
60.
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