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   25077篇
  免费   415篇
  国内免费   16篇
教育   17794篇
科学研究   2341篇
各国文化   243篇
体育   2086篇
综合类   14篇
文化理论   201篇
信息传播   2829篇
  2022年   192篇
  2021年   284篇
  2020年   415篇
  2019年   678篇
  2018年   949篇
  2017年   892篇
  2016年   785篇
  2015年   470篇
  2014年   718篇
  2013年   4851篇
  2012年   672篇
  2011年   689篇
  2010年   514篇
  2009年   519篇
  2008年   588篇
  2007年   520篇
  2006年   462篇
  2005年   439篇
  2004年   393篇
  2003年   377篇
  2002年   360篇
  2001年   488篇
  2000年   413篇
  1999年   383篇
  1998年   228篇
  1997年   221篇
  1996年   255篇
  1995年   250篇
  1994年   198篇
  1993年   219篇
  1992年   341篇
  1991年   323篇
  1990年   320篇
  1989年   327篇
  1988年   276篇
  1987年   318篇
  1986年   286篇
  1985年   327篇
  1984年   273篇
  1983年   233篇
  1982年   214篇
  1981年   174篇
  1980年   171篇
  1979年   275篇
  1978年   197篇
  1977年   183篇
  1976年   170篇
  1975年   152篇
  1974年   159篇
  1971年   149篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
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   
72.
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   
73.
74.
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   
75.
76.
Knowing is an enacted, communicated process that is difficult to observe, let alone manage, in organizations. Communities of practice (CoPs) offer a productive solution for improving knowledge and knowledge management, but the communicative processes that enact CoPs have not been explored, leaving CoPs as an organizational black box. This research extends CoP theory as a means to determine the presence of a CoP and distinguish between various CoPs, and as a practical means to evaluate the communicative processes of organizational knowledge. CoPs enact the communicative nature of knowing through the elements of mutual engagement, negotiation of a joint enterprise, and shared repertoire. Specifically, two groups of volunteers are examined through a combination of participation, observation, and interviews in order to explore CoP theory as a dynamic system for examining and evaluating organizational knowledge.  相似文献   
77.
This paper discusses the evaluation of scientific activity with the help of some scientometric indices, in particular, a citation index. The information massif of the bibliographic database of citations to domestic publications of Kazakh authors is statistically described.  相似文献   
78.
The publication activity of Russian and Belarussian scientists, the degree of reflection of their papers in Scopus databases, and the data on the citation of Belarussian authors in the works of other researchers are discussed.  相似文献   
79.
80.
The web coverage of the research activities of the VINITI RAS is considered. The practicability of using various information retrieval systems for obtaining information relevant to the Institute’s functioning and results is analyzed.  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