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   11568篇
  免费   182篇
  国内免费   12篇
教育   8439篇
科学研究   826篇
各国文化   198篇
体育   909篇
综合类   4篇
文化理论   185篇
信息传播   1201篇
  2022年   61篇
  2021年   106篇
  2020年   197篇
  2019年   283篇
  2018年   384篇
  2017年   396篇
  2016年   385篇
  2015年   272篇
  2014年   305篇
  2013年   2699篇
  2012年   304篇
  2011年   308篇
  2010年   263篇
  2009年   228篇
  2008年   352篇
  2007年   272篇
  2006年   271篇
  2005年   256篇
  2004年   215篇
  2003年   238篇
  2002年   222篇
  2001年   166篇
  2000年   161篇
  1999年   154篇
  1998年   134篇
  1997年   150篇
  1996年   153篇
  1995年   155篇
  1994年   145篇
  1993年   135篇
  1992年   141篇
  1991年   153篇
  1990年   125篇
  1989年   121篇
  1988年   117篇
  1987年   111篇
  1986年   91篇
  1985年   98篇
  1984年   87篇
  1983年   102篇
  1982年   98篇
  1981年   97篇
  1980年   103篇
  1979年   93篇
  1978年   73篇
  1977年   59篇
  1976年   71篇
  1975年   50篇
  1974年   51篇
  1972年   38篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
Metaphor and Totem: Exploring and evaluating prior experiential learning   总被引:3,自引:3,他引:0  
The evaluation and recognition of prior experiential learning is now well established. A significant issue in such evaluations has been the centrality of the learner and his/her empowerment in the educational process. However, most models of evaluation require equivalency between the unique experiences of the subject and existing course analogues. In these models evaluation is based on metaphor, on finding varying degrees of similarity between the experience being assessed and currently existing academic structures. The present paper calls for a richer perspective to be taken in assessing prior experiential learning with particular interest being seen in the notion of totemism as characterised by anthropologist Claude Levi-Strauss. A replacement of metaphor by totemism may restore power, ownership and centrality of the experience to the candidate for assessment, while allowing evaluators an opportunity to engage in a novel but authentic articulation of the underlying academic equivalency of the experience.  相似文献   
14.
15.
Objective: To determine whether information retrieval might be enhanced by making each component of a structured abstract a separately searchable field. Design: Parallel searches on records arranged so that each abstract could either be searched in its entirety or as a collection of structured fields. Subjects: Records about cardiovascular disease downloaded from MEDLINE and tested against clinical questions derived from a concurrent survey of CD-ROM use in three health science libraries. Intervention: The investigators identified terms used to structure abstracts on MEDLINE and imported the abstracts into an Idealist database prior to searching using keywords from clinical questions. Measurements and main results: recall and precision rates are given for each question in the ‘structured’ and the ‘unstructured’ set of records. Conclusions: Use of structured, rather than unstructured, abstracts improves precision at the ex-pense of recall and places heavier demands upon the searcher’s skill in choosing the correct fields within the abstract to search. Further investigation requires more accurate simulation of MEDLINE software that utilizes features such as MeSH terms, explode, facilities and delimiters.  相似文献   
16.
17.
18.
This study examined the cost and performance of six commercial document suppliers accessible via OCLC, and comapared their service to that of traditional interlibrary loan (ILL). Results indicated that, while commercial firms cannot be recommended as a wholesale replacement for ILL, they can add much-needed flexibility to a library's overall plan for document delivery.  相似文献   
19.
The authors report on a self‐completed questionnaire study from a North Yorkshire based general practice regarding the information needs of its clinicians. The work was carried out with a particular focus on the practice library, and the findings identified that a new approach to maintaining and developing the library was needed. The literature regarding the information needs of primary care clinicians and the role of practice libraries is considered, and compared to those of the clinicians at the practice. Discussion follows on how a collaborative project was set up between the practice and a librarian based at the local NHS Trust library in order to improve the existing practice library. Difficulties encountered and issues unique to the project are explored, including training implications presented by the implementation of electronic resources. Marketing activities implemented are discussed, how the library will operate in its new capacity, and how ongoing support and maintenance of the library will be carried out. It is concluded that although scepticism still exists regarding librarian involvement in practice libraries, collaboration between clinicians and librarians is an effective approach to the successful development and maintenance of a practice library, and recommendations are therefore made for similar collaborative work.  相似文献   
20.
Collaboration in research activity is now the rule not the exception. It is encouraged by government, funding bodies and research councils. However, the concept of collaboration is difficult to define. It occurs at many different levels, driven by a complex research system-policy dynamic. Three different models of collaboration – inter-personal, team and corporate – are identified, each with their own rationale, structure, benefits and costs. The paper examines the institutional implications of these models. It argues that institutions and individual researchers conceptualise and operationalise research collaboration in different ways. Although vital to institutional mission, collaborative research is rarely mapped by senior managers with any precision. In general, institutional approaches to the management of collaborative research lag behind the policy rhetoric. The paper concludes with an overview of the key dilemmas for institutional strategists and policy makers posed by the shift towards more collaborative approaches to research.  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