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   27480篇
  免费   401篇
  国内免费   26篇
教育   19680篇
科学研究   2418篇
各国文化   313篇
体育   2239篇
综合类   13篇
文化理论   220篇
信息传播   3024篇
  2022年   196篇
  2021年   290篇
  2020年   430篇
  2019年   697篇
  2018年   945篇
  2017年   921篇
  2016年   839篇
  2015年   504篇
  2014年   756篇
  2013年   5538篇
  2012年   710篇
  2011年   747篇
  2010年   563篇
  2009年   579篇
  2008年   649篇
  2007年   563篇
  2006年   500篇
  2005年   497篇
  2004年   455篇
  2003年   426篇
  2002年   429篇
  2001年   544篇
  2000年   457篇
  1999年   434篇
  1998年   239篇
  1997年   263篇
  1996年   290篇
  1995年   286篇
  1994年   231篇
  1993年   244篇
  1992年   370篇
  1991年   364篇
  1990年   353篇
  1989年   349篇
  1988年   292篇
  1987年   356篇
  1986年   311篇
  1985年   362篇
  1984年   301篇
  1983年   268篇
  1982年   232篇
  1981年   211篇
  1980年   187篇
  1979年   311篇
  1978年   239篇
  1977年   211篇
  1976年   185篇
  1975年   179篇
  1974年   174篇
  1971年   165篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
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   
42.
43.
彻底简化IT     
如何实现"简化IT"的战略,这是困扰很多企业,尤其是CIO的一个重要问题。本文以日本新生银行的例子来诠释如何彻底简化IT。中世纪哲人William of Ock- ham说过,理论应该尽可能的简单。同样的原则适用于企业IT系统:它们按照尽可能少的标准  相似文献   
44.
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   
45.
The purpose of the study was to identify the pattern of publication about women and AIDS in scientific journals. Bradford zones were identified in each of six databases. The study determined that journal scatter for this subset of AIDS literature differed from the scatter in the general literature; further, the information indexed in the six electronic sources demonstrated little overlap. Consequently, key journal and newsletter titles identified by this study should form the core of any collection focusing on women and AIDS. The assurance of quality patient care management demands that librarians consult multiple resources for information retrieval that can assist health care providers, patients, and caregivers to enhance quality of life as well as to provide optimum care.  相似文献   
46.
47.
48.
Among the huge maze of resources available on the Internet, UnCoverWeb stands out as a valuable tool for medical libraries. This up-to-date, free-access, multidisciplinary database of periodical references is searched through an easy-to-learn graphical user interface that is a welcome improvement over the telnet version. This article reviews the basic and advanced search techniques for UnCoverWeb, as well as providing information on the document delivery functions and table of contents alerting service called Reveal. UnCover's currency is evaluated and compared with other current awareness resources. System deficiencies are discussed, with the conclusion that although UnCoverWeb lacks the sophisticated features of many commercial database search services, it is nonetheless a useful addition to the repertoire of information sources available in a library.  相似文献   
49.
50.
Burgen M 《Ebony》1978,33(6):127-30, 132, 134 passim
  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