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   8513篇
  免费   92篇
  国内免费   6篇
教育   5889篇
科学研究   1108篇
各国文化   42篇
体育   471篇
综合类   15篇
文化理论   132篇
信息传播   954篇
  2023年   37篇
  2022年   61篇
  2021年   79篇
  2020年   129篇
  2019年   184篇
  2018年   323篇
  2017年   393篇
  2016年   426篇
  2015年   292篇
  2014年   273篇
  2013年   1002篇
  2012年   369篇
  2011年   379篇
  2010年   280篇
  2009年   168篇
  2008年   206篇
  2007年   226篇
  2006年   135篇
  2005年   779篇
  2004年   573篇
  2003年   384篇
  2002年   223篇
  2001年   163篇
  2000年   129篇
  1999年   102篇
  1998年   76篇
  1997年   58篇
  1996年   72篇
  1995年   39篇
  1994年   47篇
  1993年   31篇
  1992年   56篇
  1991年   58篇
  1990年   42篇
  1989年   49篇
  1988年   45篇
  1987年   38篇
  1986年   43篇
  1985年   42篇
  1984年   39篇
  1983年   22篇
  1982年   36篇
  1981年   26篇
  1980年   24篇
  1979年   38篇
  1978年   31篇
  1977年   22篇
  1974年   23篇
  1972年   26篇
  1971年   19篇
排序方式: 共有8611条查询结果,搜索用时 15 毫秒
31.
The necessity for publishing a separate abstract journal on spintronics, which is a new, rapidly developing branch of physics, is substantiated. The interest in spintronics, which is the study of fundamental processes involving the simultaneous transport of both electron charge and electron spins in solids, as well as the interaction of electrons with a magnetic grating, is determined not only by its fascinating prospects but also the results that have already achieved. The spin and charge “degrees of freedom” open possibilities for the creation of semiconducting devices with parameters that are much superior to the existing ones and also the construction of devices that do not have analogues at present. First of all, this will permit problems of information transmission and processing to be solved in a new way. A detailed rubrication on spintronics is given in order to discuss the possibility of publishing a separate edition of an abstract journal devoted to spintronics.  相似文献   
32.
An outreach project which juxtaposed technology (Grateful Med) and a human intermediary (a circuit librarian) to serve health professionals in a rural area of Illinois is described. The five goals of the project were: promote Grateful Med as a clinical tool; introduce circuit librarianship to Illinois; heighten the awareness of health professionals to the value of timely information services; increase the visibility of the resource library; and evaluate the impact of the two components, Grateful Med and circuit librarianship. While the project was well-received and enjoyed short-term success, sustaining the same level of information activity post-project has not been achieved. Insuring utilization of health information by remote health professionals may be characterized as a Sisyphean task.  相似文献   
33.
Book reviews     
Zwartjes, Otto, ed. La Sociedad andalusí y sus tradiciones literarias (Foro Hispánico, 7). Amsterdam: Rodopi, 1994.

Brincat, Joseph M. Malta 870–1054: Al‐Himyai's Account and its Linguistic Implications. Malta: Said International Ltd., 1995. 52pp.

Sells, Michael A. Mystical Languages of Unsaying. Chicago: The University of Chicago Press, 1994. 316 pp., US$18.95 (paperback), US$49.91 (cloth).

Diem, Werner, Arabische Geschäftsbriefe des 10. bis 14. Jahrhunderts aus der Österreichischen Nationalbibliothek in Wien (Documents Arabica Antiqua 1), 2 vols. Wiesbaden: Harrassowitz, 1995. Textband ix+518pp., Tafelband 76 plates.

Coope, Jessica A. The Martyrs of Cordoba: Community and Family Conflict in an Age of Mass Conversion. Lincoln: University of Nebraska Press, 1995. xvii+113 pp., US$ 25 (cloth).

Edwards, John. Religion and Society in Spain, c.1492 (Variorum Collected Studies Series: CS 520). Aldershot and Brookfield: Variorum, 1996. x+351 pp., US$ 97.00 (cloth).

Tolan, John Victor, ed. Medìeval Christian Perceptions of Islam. A Book of Essays (Garland Medieval Casebooks, Volume 10). New York and London: Garland Publishing, 1996. xxi+414 pp., US$60.00 (cloth).  相似文献   

34.
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   
35.
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   
36.
37.
38.
39.
A paper read at the first regular meeting of the Osler Society of McGill University, October 19, 1921.  相似文献   
40.
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