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   15503篇
  免费   293篇
  国内免费   12篇
教育   10747篇
科学研究   1793篇
各国文化   182篇
体育   1270篇
综合类   18篇
文化理论   188篇
信息传播   1610篇
  2022年   110篇
  2021年   165篇
  2020年   277篇
  2019年   376篇
  2018年   525篇
  2017年   526篇
  2016年   524篇
  2015年   340篇
  2014年   465篇
  2013年   2658篇
  2012年   397篇
  2011年   378篇
  2010年   350篇
  2009年   313篇
  2008年   346篇
  2007年   334篇
  2006年   314篇
  2005年   263篇
  2004年   288篇
  2003年   269篇
  2002年   256篇
  2001年   339篇
  2000年   349篇
  1999年   273篇
  1998年   158篇
  1997年   195篇
  1996年   192篇
  1995年   137篇
  1994年   150篇
  1993年   130篇
  1992年   215篇
  1991年   203篇
  1990年   226篇
  1989年   222篇
  1988年   199篇
  1987年   204篇
  1986年   183篇
  1985年   220篇
  1984年   163篇
  1983年   138篇
  1982年   130篇
  1981年   125篇
  1980年   114篇
  1979年   184篇
  1978年   145篇
  1977年   120篇
  1975年   97篇
  1974年   103篇
  1973年   92篇
  1971年   91篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
This case study presents the development and implementation of a personal librarian program for a cohort-based, executive-style higher education administration doctoral program. Librarians and the program director collaborated to create a student-centered program based on individual research needs. The personal librarian program was designed to build a close relationship between the librarian and individual students; to help identify their research knowledge gaps; and to identify resources to meet each individual students' research needs.  相似文献   
82.
ABSTRACT

Latent Dirichlet allocation (LDA) topic models are increasingly being used in communication research. Yet, questions regarding reliability and validity of the approach have received little attention thus far. In applying LDA to textual data, researchers need to tackle at least four major challenges that affect these criteria: (a) appropriate pre-processing of the text collection; (b) adequate selection of model parameters, including the number of topics to be generated; (c) evaluation of the model’s reliability; and (d) the process of validly interpreting the resulting topics. We review the research literature dealing with these questions and propose a methodology that approaches these challenges. Our overall goal is to make LDA topic modeling more accessible to communication researchers and to ensure compliance with disciplinary standards. Consequently, we develop a brief hands-on user guide for applying LDA topic modeling. We demonstrate the value of our approach with empirical data from an ongoing research project.  相似文献   
83.
Courses: This unit activity is intended for public relations (PR), crisis communication, or journalism courses.

Objectives: The purpose is to equip future PR professionals with critical thinking skills and experience to manage crises. Students demonstrate mastery in two ways: by crafting clear crisis response messages and materials in a narrow time frame, and by applying a crisis communication heuristic to manage a simulated crisis event.  相似文献   

84.
This study explores science communication on Twitter by investigating a sample of tweets referring to academic papers in five different scientific fields. The specifications of science communicators on Twitter, the characteristics of those who initiate actions (by tweeting), the extent and quality of reactions (retweeting), individual and group interactions, and the distribution of tweets across types of engagement in the process of science communication (i.e., dissemination, consultation, and evaluation) were explored. A broad array of actors is involved in the communication of science on Twitter, with individual citizens and individual researchers playing an important role. In principle, this is promising for creating direct interaction, which can be difficult through more traditional mass media. The vast majority of communication activities regarding academic papers is undigested dissemination with almost no sign of debate, contestation, or collective reflection. Another general finding of this study is that bot accounts play a major role in the science communication landscape on Twitter.  相似文献   
85.
86.
87.
88.
89.
90.
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