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   3794篇
  免费   52篇
  国内免费   10篇
教育   2730篇
科学研究   310篇
各国文化   68篇
体育   274篇
综合类   2篇
文化理论   27篇
信息传播   445篇
  2023年   13篇
  2022年   31篇
  2021年   57篇
  2020年   113篇
  2019年   141篇
  2018年   173篇
  2017年   181篇
  2016年   160篇
  2015年   114篇
  2014年   152篇
  2013年   939篇
  2012年   123篇
  2011年   113篇
  2010年   116篇
  2009年   107篇
  2008年   110篇
  2007年   98篇
  2006年   99篇
  2005年   62篇
  2004年   59篇
  2003年   64篇
  2002年   62篇
  2001年   60篇
  2000年   47篇
  1999年   43篇
  1998年   29篇
  1997年   30篇
  1996年   38篇
  1995年   32篇
  1994年   35篇
  1993年   37篇
  1992年   37篇
  1991年   38篇
  1990年   20篇
  1989年   34篇
  1988年   23篇
  1987年   22篇
  1986年   15篇
  1985年   27篇
  1984年   20篇
  1983年   14篇
  1982年   26篇
  1981年   13篇
  1980年   11篇
  1979年   17篇
  1978年   14篇
  1977年   13篇
  1976年   9篇
  1974年   10篇
  1973年   11篇
排序方式: 共有3856条查询结果,搜索用时 484 毫秒
1.
2.
In Korean information retrieval, compound nouns play an important role in improving precision in search experiments. There are two major approaches to compound noun indexing in Korean: statistical and linguistic. Each method, however, has its own shortcomings, such as limitations when indexing diverse types of compound nouns, over-generation of compound nouns, and data sparseness in training. In this paper, we propose a corpus-based learning method, which can index diverse types of compound nouns using rules automatically extracted from a large corpus. The automatic learning method is more portable and requires less human effort, although it exhibits a performance level similar to the manual-linguistic approach. We also present a new filtering method to solve the problems of compound noun over-generation and data sparseness.  相似文献   
3.
4.
5.
As a part of efforts to evaluate and monitor the increasing public investment in early childhood education, teachers are being asked to assess children's school readiness. In this study, preschool teachers and kindergarten teachers rated children's skills in three areas (kindergarten readiness, academic skills, and communication skills), and these ratings were compared with direct assessments of the children's skills. Ratings by both groups of teachers tended to be more highly related to basic skills, such as counting and number naming, than to abilities such as solving applied problems and using expressive and receptive vocabulary. Preschool teachers' ratings had a lower association with children's observed skills and abilities than kindergarten teachers' ratings. Ratings of children attending Head Start were systematically inflated, but this relationship was mediated to a significant extent by the teachers' levels of education. More educated teachers rated children in a manner consistent with the children's directly assessed skills. Implications of these findings for informing future efforts to assess school readiness by using teacher ratings are discussed.  相似文献   
6.
7.
8.
Research on psychometric methods is heavily dependent on software. The quality, availability, and documentation of such software are critical to the advancement of the field. In 2000, an ad hoc committee of NCME recommended that NCME adopt policies that promote greater availability and better documentation of software. This article follows the ad hoc committee's report by examining the use of software in four top-tiered journals in recent years. The results indicated that the most frequently cited programs were those written by the articles' authors. The documentation and availability for these programs are often not clear, particularly for software used for simulations. The use of proprietary software was not widespread in the four journals, but there is still room for concern in the future. This article recommends that NCME form a permanent committee to address software issues.  相似文献   
9.
10.
Information access is central to library and information science, yet explorations of its conceptual nature have been limited. Given the importance of information access to the discipline, there is a need for research to create a better understanding of the concept and its many roles in all activities and behaviors related to information. Drawing on the theoretical work of Elfreda Chatman, this article proposes that the study of information access can be facilitated through the recognition and examination of the physical, intellectual, and social aspects of information access. These types of access are examined through three case studies in terms of different information behaviors and contexts, with a particular focus on the importance of social access. The article also discusses the future roles that considerations of social access can play in research and theory.  相似文献   
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