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   18954篇
  免费   189篇
  国内免费   15篇
教育   13379篇
科学研究   2059篇
各国文化   262篇
体育   1232篇
综合类   10篇
文化理论   188篇
信息传播   2028篇
  2021年   115篇
  2020年   193篇
  2019年   313篇
  2018年   382篇
  2017年   457篇
  2016年   415篇
  2015年   298篇
  2014年   419篇
  2013年   4065篇
  2012年   344篇
  2011年   364篇
  2010年   321篇
  2009年   311篇
  2008年   380篇
  2007年   386篇
  2006年   360篇
  2005年   334篇
  2004年   304篇
  2003年   279篇
  2002年   264篇
  2001年   257篇
  2000年   268篇
  1999年   264篇
  1998年   192篇
  1997年   192篇
  1996年   206篇
  1995年   223篇
  1994年   219篇
  1993年   219篇
  1992年   254篇
  1991年   252篇
  1990年   245篇
  1989年   261篇
  1988年   217篇
  1987年   228篇
  1986年   233篇
  1985年   254篇
  1984年   261篇
  1983年   250篇
  1982年   223篇
  1981年   210篇
  1980年   168篇
  1979年   221篇
  1978年   227篇
  1977年   189篇
  1976年   173篇
  1975年   150篇
  1974年   141篇
  1973年   156篇
  1971年   122篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
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   
62.
63.
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   
64.
This article discusses HIV infection in terms of the risk manager's information needs in the health care environment. The malpractice problem, increasing workman's compensation suits, the greater role of the ombudsman, implementation of the National Practitioner Data Bank, and the Joint Commission on Accreditation of Health Care Organizations' (JCAHO) emphasis on clinical excellence are conditions which have given greater importance to the risk manager's position. Included in this article are hedges to retrieve various components of risk management and a select bibliography from AIDSLINE.  相似文献   
65.
我们长期将数字图书馆作为一个独立的世界来构建,这个独立的世界中包括数字对象的创建、管理、发现、传递以及利用等。这种相对封闭的模式与高度发达的开放网络世界背道而驰。在网络世界中,用户可以通过大型的检索系统,如Google和Amazon来发现信息,还可以在管理这些信息资源的系统之外对其进行利用。当用户都涌向网络世界时,数字图书馆就面临着打破其固有封闭状态的挑战,以便适应开放的网络世界,否则将失去其实用性。当前,许多条件都给数字图书馆提供了改变现状、提高实用性的机遇。本文将讨论数字图书馆现存的典型模式以及该模式带来的后果,讨论数字图书馆工作改革的方式,并简要探讨数字图书馆建设中的成功技术实例。  相似文献   
66.
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   
67.
Web sites are increasingly used by academic libraries to promote key services and collections to teaching faculty. This study analyzes the content, location, language, and technological features of fifty-four academic library Web pages designed especially for faculty to expose patterns in the development of these pages.  相似文献   
68.
Our paper analyzes the conduct of German public performing arts institutions in terms of non-market decision making or public choice. Apart from consumers of performing arts managers of performing arts institutions and public donors are main agents. A manager of a performing arts institution will not assume that the number of visitors is independent of his institution's programme or the ticket prices. By the same reasoning he will regard the amount of public subsidies not as exogenous, but dependent on his own policy. If future grants depend on present and past success (however defined), this will feed back into managerial decisions, along with expectations about demand. Data for the Federal Republic of Germany serve to empirically support the theoretical argument.  相似文献   
69.
70.
In 1991, the Reference and Information Services staff of the Alfred Taubman Medical Library at the University of Michigan gathered data on the use of the reference desk, including the frequency and types of assistance requested by different user groups throughout the year. Recommendations based on the results of this study led to improved service as well as more efficient use of staff resources.  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