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   23406篇
  免费   351篇
  国内免费   126篇
教育   16522篇
科学研究   2505篇
各国文化   266篇
体育   1956篇
综合类   14篇
文化理论   247篇
信息传播   2373篇
  2021年   177篇
  2020年   349篇
  2019年   504篇
  2018年   698篇
  2017年   666篇
  2016年   663篇
  2015年   450篇
  2014年   548篇
  2013年   4386篇
  2012年   518篇
  2011年   552篇
  2010年   437篇
  2009年   418篇
  2008年   523篇
  2007年   488篇
  2006年   470篇
  2005年   454篇
  2004年   399篇
  2003年   422篇
  2002年   394篇
  2001年   383篇
  2000年   382篇
  1999年   384篇
  1998年   244篇
  1997年   250篇
  1996年   297篇
  1995年   290篇
  1994年   240篇
  1993年   225篇
  1992年   319篇
  1991年   329篇
  1990年   324篇
  1989年   339篇
  1988年   286篇
  1987年   290篇
  1986年   281篇
  1985年   319篇
  1984年   277篇
  1983年   283篇
  1982年   237篇
  1981年   238篇
  1980年   232篇
  1979年   314篇
  1978年   243篇
  1977年   222篇
  1976年   198篇
  1975年   173篇
  1974年   183篇
  1973年   158篇
  1971年   147篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
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   
32.
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   
33.
This article focuses on several conceptual and structural issues that are central to copyright compliance in the electronic age. It presumes the development of a national electronic network for storing, organizing, accessing, managing, and charging for information. The article first discusses the implications of constructing a comprehensive electronic “highway,” or Digital Library System (DLS), which would link information to the widespread community of users. It then presents the ramifications of a highly decentralized set of subsystems serving rights holders and users, linked by protocols established by the DLS. A discussion of the implications of digital interchangeability for copyright follows. The article ends with an analysis of alternatives to existing intellectual property rights conveyance systems, and concludes that current ownership structures, and systems for conveying rights and royalties, will remain the foundation for copyright in the electronic world. This article appeared in a slightly different form in theProceedings of the Twelfth National Online Meeting—1991, and is published here with the permission of Learned Information, Inc., Medford, N.J.  相似文献   
34.
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   
35.
Through the employment of a hybrid research model blending concept mapping and stimulated recall methodologies, this study explored the nature of a Pastoral Care Teacher's theory of action; the relationship between those beliefs and ideals and interactive thinking; and specific actions in effectively teaching a Pastoral Care issue. In undertaking the research a group of Year Eight boys at the Anglican Church Grammar School (Churchie) provided the context. The study shows that: (i) the teacher possessed a broad knowledge and understanding of the nature of Pastoral Care at Churchie; and (ii) the lessons undertaken, the pedagogy employed, and the knowledge elicited closely resembled the teacher's philosophies and thinking.  相似文献   
36.
The introduction to this article discusses a dilemma facing many Third World countries: should they place computers in their schools and, if so, for what purposes? The author outlines four common rationales—the Social, Vocational, Pedagogical and Catalytic—and refers to two less common ones—the Information Technology Industry and Cost-effectiveness Rationales. The main text describes policy in China at national level, and analyses policy and practice in Beijing City and Zhejiang Province. The paper is based on an international co-operative study of computers in African, Asian and Arabic- speaking schools, funded by the Harold Macmillan Trust.  相似文献   
37.
38.
39.
40.
Co-production occurs when two or more institutions contribute funds and labour to the processes of making course components for distance teaching. The author summarises reasons for international co-production of multimedia distance-teaching courses and provides a checklist of questions that should be considered before entering upon such co-production.
The second half of the article consists of a composite case study based on the UK's Open University experience of international co-production. The paper ends with three questions: Is international co-production of this kind worth trying? Can the chances of success be made high enough by careful planning to justify risking capital in such ventures? Are other forms of collaboration more likely to be cost-effective?  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