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   25554篇
  免费   443篇
  国内免费   36篇
教育   18544篇
科学研究   2163篇
各国文化   278篇
体育   1950篇
综合类   35篇
文化理论   244篇
信息传播   2819篇
  2022年   129篇
  2021年   251篇
  2020年   404篇
  2019年   568篇
  2018年   783篇
  2017年   879篇
  2016年   799篇
  2015年   506篇
  2014年   661篇
  2013年   5176篇
  2012年   622篇
  2011年   713篇
  2010年   548篇
  2009年   542篇
  2008年   614篇
  2007年   584篇
  2006年   531篇
  2005年   467篇
  2004年   440篇
  2003年   413篇
  2002年   448篇
  2001年   486篇
  2000年   460篇
  1999年   459篇
  1998年   262篇
  1997年   285篇
  1996年   312篇
  1995年   269篇
  1994年   256篇
  1993年   241篇
  1992年   345篇
  1991年   335篇
  1990年   354篇
  1989年   332篇
  1988年   305篇
  1987年   253篇
  1986年   274篇
  1985年   337篇
  1984年   262篇
  1983年   247篇
  1982年   193篇
  1981年   204篇
  1980年   171篇
  1979年   260篇
  1978年   204篇
  1977年   207篇
  1976年   170篇
  1975年   143篇
  1974年   136篇
  1973年   155篇
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
111.
Benchmarking is a quality improvement tool that is increasingly being applied to the health care field and to the libraries within that field. Using mostly resources assessible at no charge through the Internet, a collection of information was compiled on benchmarking and its applications. Sources could be identified in several formats including books, journals and articles, multi-media materials, and organizations.  相似文献   
112.
Before planning for provision of Consumer Health Information Services, the librarian and administration must anticipate the problems encountered in sharing funds, personnel, space, and materials with an existing medical or patient education library. Establishing new space within or outside the hospital, or participating in community projects which meet consumer health information needs, are important considerations for planners. This article sets forth the place of some CHI services in the hospital setting, and how they relate to other library services. Differences between hospital library support for Patient Education and for Consumer Health Information services are discussed.  相似文献   
113.
Journal searching in non-MEDLINE resources on Internet Web sites   总被引:1,自引:0,他引:1  
Internet access to the medical journal literature is absorbing the attention of all relevant parties, i.e., publishers, journal vendors, librarians, commercial providers, government agencies, and end users. Journal content on the Web sites spans the range from advertising and ordering information for the print version, to table of contents and abstracts, to downloadable full text and graphics of articles. The searching parameters for systems other than MEDLINE also differ extensively with a wide variety of features and resulting retrieval. This discussion reviews a selection of providers of medical information (particularly the journal literature) on the Internet, making a comparison of what is available on Web sites and how it can be searched.  相似文献   
114.
115.
In order to assess the current status of MEDLINE training provided by schools of library science, a survey was conducted of those schools having an educational identification code issued by the National Library of Medicine. Information was gathered on such variables as the instructors' background and preparation, the course objectives and content, and the amount of on-line experience provided to students in each of eleven programs. An evaluation of these measures indicates that more opportunities to gain experience in using MEDLINE should be initiated by library schools and that current efforts should be continued and expanded. Specific recommendations for accomplishing these goals are outlined; they are addressed to health sciences librarians, library school educators, the Medical Library Association, and the National Library of Medicine.  相似文献   
116.
117.
118.
119.
120.
Indexing consistency in MEDLINE   总被引:3,自引:0,他引:3  
The quality of indexing of periodicals in a bibliographic data base cannot be measured directly, as there is no one "correct" way to index an item. However, consistency can be used to measure the reliability of indexing. To measure consistency in MEDLINE, 760 twice-indexed articles from 42 periodical issues were identified in the data base, and their indexing compared. Consistency, expressed as a percentage, was measured using Hooper's equation. Overall, checktags had the highest consistency. Medical Subject Headings (MeSH) and subheadings were applied more consistently to central concepts than to peripheral points. When subheadings were added to a main heading, consistency was lowered. "Floating" subheadings were more consistent than were attached subheadings. Indexing consistency was not affected by journal indexing priority, language, or length of the article. Terms from MeSH Tree Structure categories A, B, and D appeared more often than expected in the high-consistency articles; whereas terms from categories E, F, H, and N appeared more often than expected in the low-consistency articles. MEDLINE, with its excellent controlled vocabulary, exemplary quality control, and highly trained indexers, probably represents the state of the art in manually indexed data bases.  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