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   1981篇
  免费   68篇
  国内免费   1篇
教育   1511篇
科学研究   52篇
各国文化   31篇
体育   118篇
综合类   1篇
文化理论   14篇
信息传播   323篇
  2023年   17篇
  2022年   27篇
  2021年   43篇
  2020年   71篇
  2019年   114篇
  2018年   132篇
  2017年   137篇
  2016年   107篇
  2015年   85篇
  2014年   79篇
  2013年   458篇
  2012年   67篇
  2011年   69篇
  2010年   67篇
  2009年   57篇
  2008年   76篇
  2007年   46篇
  2006年   47篇
  2005年   43篇
  2004年   37篇
  2003年   30篇
  2002年   25篇
  2001年   18篇
  2000年   20篇
  1999年   9篇
  1998年   16篇
  1997年   15篇
  1996年   10篇
  1995年   13篇
  1994年   14篇
  1993年   10篇
  1992年   9篇
  1991年   12篇
  1990年   8篇
  1989年   4篇
  1988年   7篇
  1987年   5篇
  1986年   7篇
  1985年   6篇
  1984年   9篇
  1983年   6篇
  1982年   3篇
  1981年   2篇
  1979年   2篇
  1973年   1篇
  1972年   1篇
  1970年   1篇
  1963年   1篇
  1943年   1篇
  1942年   1篇
排序方式: 共有2050条查询结果,搜索用时 15 毫秒
1.
2.
ABSTRACT

This article offers a textual analysis and semiotic reading of the Rich Kids of Tehran's (RKOT’s) Instagram page. Contributing to scholarship on Iranian youth media practices, this article interrogates how the RKOT navigate urban and rural space to engage in everyday processes of resistance against global and local systemic oppression. Grounding their visual representations on Instagram in historical and cultural context, the author questions how and when quotidian actions are transformed into political transgressions when posted on social media. This article emphasizes the RKOT's agency in shaping their brand by analyzing representations of gender performance, intertextuality, and national identity on Instagram.  相似文献   
3.
Children with spelling deficits demonstrate significant difficulty using inflectional morphology in their writing. This study investigated whether phonological deficits account for these pronounced difficulties or if they are more accurately explained by limitations in morphological or orthographic awareness. Twenty–six 11—13–year–old children with spelling deficits, 31 younger spelling–level–matched children, and 31 age–matched children were asked to spell a series of verbs with past tense and progressive markers in dictated sentences and in list form. Performance on spelling tasks was compared to performance on phonological, morphological, and orthographic awareness tasks. Results suggest that children with spelling deficits have significant difficulty including inflections as well as spelling inflections and base words. Difficulty was most pronounced in a sentence context. Ability to spell inflectional forms was related to variation in morphological awareness in children with spelling deficits and to variation in orthographic awareness in spelling–level–matched children.  相似文献   
4.
In the cultural heritage area, it is of fundamental importance to characterize and classify the conservation state of the materials constituting ancient monuments, in order to study and monitor their decay. Generally, the decay diagnosis is provided by “naked eye” analysis done by expert scientists “walking around” the artifact and recording the conservation state of each individual element they observe. In this paper, a color image segmentation approach, based on histogram threshold and edge detection techniques is presented, to extract degradation regions, characterized by holes or cavities, from color images of stone-materials. The goal is to provide an aid to the decay diagnosis by segmenting degraded regions from color images, computing quantitative data, such as the area and perimeter of the extracted zones, and processing qualitative information, such as various levels of depth detected into the same zones. Since color is a powerful tool in the distinction between objects, a segmentation technique based on color, instead of intensity only, has been used to provide a clearer discrimination between regions. The study case concerns the impressive remains of the Roman Theatre in the city of Aosta (Italy). In particular, we have processed and analyzed some color images of the theatre puddingstones, acquired by a camera.  相似文献   
5.
6.
7.
Book reviews     
Association of Research Libraries  相似文献   
8.
Information literacy involves the location and access of information through retrieval systems, and many information retrieval systems are designed with specific capabilities to support these very skills. In some cases, system enhancements go beyond simple support and alleviate some of the searcher's responsibilities by performing certain tasks for them. By comparing information retrieval functions to the Association of College and Research Libraries' information literacy standards, this article investigates the extent of support that these enhanced systems can offer, and gives librarians greater insight into how these design enhancements could have an impact on information literacy instruction.  相似文献   
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