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   28266篇
  免费   375篇
  国内免费   24篇
教育   19292篇
科学研究   3570篇
各国文化   281篇
体育   2022篇
综合类   22篇
文化理论   278篇
信息传播   3200篇
  2021年   237篇
  2020年   385篇
  2019年   544篇
  2018年   710篇
  2017年   773篇
  2016年   703篇
  2015年   464篇
  2014年   668篇
  2013年   5050篇
  2012年   605篇
  2011年   587篇
  2010年   526篇
  2009年   508篇
  2008年   581篇
  2007年   572篇
  2006年   522篇
  2005年   452篇
  2004年   456篇
  2003年   411篇
  2002年   419篇
  2001年   519篇
  2000年   567篇
  1999年   462篇
  1998年   264篇
  1997年   299篇
  1996年   313篇
  1995年   249篇
  1994年   273篇
  1993年   266篇
  1992年   421篇
  1991年   394篇
  1990年   418篇
  1989年   447篇
  1988年   345篇
  1987年   366篇
  1986年   367篇
  1985年   429篇
  1984年   360篇
  1983年   337篇
  1982年   304篇
  1981年   274篇
  1980年   267篇
  1979年   360篇
  1978年   345篇
  1977年   260篇
  1976年   246篇
  1975年   206篇
  1974年   214篇
  1973年   226篇
  1971年   184篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
EPIC is a service that provides keyword or subject access to the OCLC Online Union Catalog (OLUC). This capability increases the success rate for title location as well as the potential uses of the OLUC. The features of the EPIC system, application of these features to the OLUC, and specific uses in health sciences libraries are described in this article.  相似文献   
102.
103.
Serials, one of the more complicated areas of library technical endeavors, has lacked the benefit of standards for a long time. Even now, with standards beginning to be available, the majority of institutions are not working within standard serials formats. A survey to determine the use of serials standards in libraries was conducted in 1988 by the American Library Association, Resources and Technical Services Division, Serials Section, Committee to Study Serials Standards. In the spring of 1988 a survey was sent to a group encompassing the Association of Research Libraries members, CONSER participants, United States Newspaper Program participants, Microform Project libraries, and some vendors and librarians who attended the Committee meetings on a regular basis. The survey questionnaire assessed the current level of serials standards awareness of librarians and vendors. Topics included the type of serials systems used, standards relevant to serials control and union listing and whether or not they are implemented, types and levels of training staff received in the application of standards, benefits of the standards, and areas where standards are most needed.  相似文献   
104.
105.
As a gatekeeper to medical literature and a critical link in the delivery of information to physicians, the librarian's role raises the issue of the librarian's professional liability. The paper suggests several ways in which liability may attach to the librarian or the librarian's employers. Although the librarian's personal risk is negligible, the physician's exposure due to ineffective library work is substantial since the courts have held that a physician must keep abreast of progress in his field. Librarians can also become associated with professional liability actions as part of a case against a physician or hospital through the legal doctrine of vicarious liability. The paper concludes by suggesting several proactive steps for health sciences librarians to pursue to insulate themselves from professional liability and to insulate physicians and institutions from vicarious liability.  相似文献   
106.
107.
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   
108.
Governments worldwide are increasingly using Web-based business models to enhance their service delivery. Yet the concept of the business model is unexplored within the context of e-government. Drawing upon the literature on e-commerce, we develop a taxonomy for analyzing Web-based business models for e-government. Based on a systematic survey of 59 e-government Web sites in the Netherlands, our findings indicate that most of the Web sites use the content provider or direct-to-customer business models, while only a few are using novel business models. Overall, the concept of business model is appealing and useful in the public sector. Specifically it compliments research on Web site quality by analyzing and describing Web sites using atomic e-government business models and suggesting improvements by using combinations of business models.  相似文献   
109.
110.
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