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   920篇
  免费   16篇
教育   737篇
科学研究   17篇
各国文化   8篇
体育   59篇
综合类   1篇
文化理论   4篇
信息传播   110篇
  2023年   5篇
  2022年   6篇
  2021年   13篇
  2020年   16篇
  2019年   27篇
  2018年   35篇
  2017年   39篇
  2016年   31篇
  2015年   18篇
  2014年   23篇
  2013年   218篇
  2012年   26篇
  2011年   31篇
  2010年   22篇
  2009年   23篇
  2008年   23篇
  2007年   19篇
  2006年   26篇
  2005年   36篇
  2004年   22篇
  2003年   15篇
  2002年   20篇
  2001年   15篇
  2000年   16篇
  1999年   11篇
  1998年   17篇
  1997年   17篇
  1996年   16篇
  1995年   12篇
  1994年   9篇
  1993年   8篇
  1992年   8篇
  1991年   8篇
  1990年   8篇
  1989年   5篇
  1988年   10篇
  1986年   6篇
  1985年   4篇
  1984年   5篇
  1983年   5篇
  1982年   13篇
  1981年   7篇
  1980年   7篇
  1979年   7篇
  1978年   5篇
  1977年   3篇
  1976年   3篇
  1975年   3篇
  1974年   4篇
  1968年   2篇
排序方式: 共有936条查询结果,搜索用时 15 毫秒
861.
862.
863.
This project provides an interpretation of how one cooperative support organization, the Nebraska Cooperative Council, discursively functions to help its constituent cooperatives consolidate resources in order to better intersect with organizations in a larger bureaucratic system. In analyzing qualitative data collected through in-depth interviews, surveys, and organizational documents, we found the paradox of stability and change a revealing prism through which to make sense of participants' experiences. We work toward locating and describing how the Council, through its boundary-spanning activities, helps cooperatives manage the paradox of stability and change while protecting their core participatory ideologies. By providing networks of learning, promoting the legitimacy of cooperative forms of organizing, and protecting cooperatives' interests, the Council is an entity helping cooperatives to reconcile their internal requirements for democracy with the external demands of the marketplace.  相似文献   
864.
The authors of this paper examine the relationship between level of schooling and literacy attainment in four rural communities in Guatemala. They first identify the grade at which most children become literate. Secondly, they estimate the net contribution of schooling to literacy. Finally, they ask whether literacy skills acquired under poor or restricted school conditions are likely to be lost over time after the pupil has left school.  相似文献   
865.
866.
This paper discusses the database design developed by the authors' company for its new range of database systems as an example of a design of database which allows a wider range of capabilities than does the conventional IR database. The paper discusses the range of searching options which are now possible. It describes how searches may be prestructured to pinpoint the desired target items, which are then selected from a browsable display. It describes the navigation capability which allows the user to move from record to record within the database, thus facilitating the extraction of “related” information. The design is discussed from the user viewpoint, and emphasis is placed on the facilities and how they complement existing Boolean/key access facilities.  相似文献   
867.
This essay presents analyses of two of the ten site visits of computer classrooms (CCRs) conducted between 1998 and 2003. The two sites are located institutionally within departments of English of two U.S. university campuses. The two CCRs examined here were: (1) observed on site by the author in 2000 and 2001; (2) analyzed according to a set of criteria established before the on-site analyses; and (3) photographed. In addition, a digital writing-rhetoric and/or technical writing faculty member was interviewed in person during each site visit. The analysis, part of a book-length project, provides partial data for determining some kinds of physical and architectural/design issues that existed in selected CCRs in the early 2000s and in a number of similar digital environments today  相似文献   
868.
869.
A wealth of information can be extracted from clients’ dream narratives. Few counsellors, however, recognize the significance of monitoring their own dreams. In this clinically-informed position paper, counsellors are urged to consider their own dream content. Self-awareness is vital to the therapeutic relationship, but also instrumental to the safety and well-being of counsellors themselves. Dreaming about one’s client can reflect troubled therapeutic rapport and highlight emotional or countertransference issues. Dreams can be harbingers of vicarious traumatization. Thus, counsellors are encouraged to reflect on their own dreams as a deliberate self-care initiative in order to promote a safe and effective practice.  相似文献   
870.
Background: People search medline for trials of healthcare interventions for clinical decisions, or to produce systematic reviews, practice guidelines, or technology assessments. Finding all relevant randomized controlled trials (RCTs) with little extraneous material is challenging. Objective: To provide comparative data on the operating characteristics of search filters designed to retrieve RCTs from medline . Methods: We identified 38 filters. The testing database comprises handsearching data from 161 clinical journals indexed in medline . Sensitivity, specificity and precision were calculated. Results: The number of terms and operating characteristics varied considerably. Comparing the retrieval against the single term ‘randomized controlled trials.pt.’ (sensitivity for retrieving RCTs, 93.7%), 24 of 38 filters had statistically higher sensitivity; 6 had a sensitivity of at least 99.0%. Four other filters had specificities (non retrieval of non‐RCTs) that were statistically not different or better than the single term (97.6%). Precision was poor: only two filters had precision (proportion of retrieved articles that were RCTs) statistically similar to that of the single term (56.4%)—all others were lower. Filters with more search terms often had lower specificity, especially at high sensitivities. Conclusion: Many RCT filters exist (n = 38). These comparative data can direct the choice of an RCT filter.  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