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   25658篇
  免费   237篇
  国内免费   11篇
教育   18780篇
科学研究   2834篇
各国文化   118篇
体育   1481篇
综合类   17篇
文化理论   552篇
信息传播   2124篇
  2022年   121篇
  2021年   166篇
  2020年   245篇
  2019年   368篇
  2018年   2587篇
  2017年   2483篇
  2016年   1989篇
  2015年   402篇
  2014年   535篇
  2013年   2493篇
  2012年   570篇
  2011年   996篇
  2010年   1132篇
  2009年   701篇
  2008年   909篇
  2007年   1404篇
  2006年   354篇
  2005年   618篇
  2004年   688篇
  2003年   580篇
  2002年   372篇
  2001年   332篇
  2000年   356篇
  1999年   260篇
  1998年   147篇
  1997年   202篇
  1996年   183篇
  1995年   129篇
  1994年   141篇
  1993年   123篇
  1992年   204篇
  1991年   193篇
  1990年   220篇
  1989年   217篇
  1988年   185篇
  1987年   197篇
  1986年   175篇
  1985年   219篇
  1984年   162篇
  1983年   133篇
  1982年   131篇
  1981年   111篇
  1980年   117篇
  1979年   180篇
  1978年   138篇
  1977年   114篇
  1976年   92篇
  1975年   94篇
  1974年   99篇
  1973年   100篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
The turn to oral history in Qatar and the Arabian (also known as Persian) Gulf is not a rejection of traditional archival authority as has been the case in other parts of the world. In the Gulf, oral history has been embraced out of a desire to fill the silences of the largely unwritten record attributable to previous low levels of literacy and strong oral traditions in the region. Today, oral history is seen as the best method to capture details about traditional ways of life during the pre-oil era. After discussing archival concerns about the evidentiary nature of oral histories, this paper explores how it has come to be a crucial documentation tool in the Gulf, adapted to the specific nation building and cultural heritage priorities of the region.  相似文献   
122.
The purpose of this study is to find a theoretically grounded, practically applicable and useful granularity level of an algorithmically constructed publication-level classification of research publications (ACPLC). The level addressed is the level of research topics. The methodology we propose uses synthesis papers and their reference articles to construct a baseline classification. A dataset of about 31 million publications, and their mutual citations relations, is used to obtain several ACPLCs of different granularity. Each ACPLC is compared to the baseline classification and the best performing ACPLC is identified. The results of two case studies show that the topics of the cases are closely associated with different classes of the identified ACPLC, and that these classes tend to treat only one topic. Further, the class size variation is moderate, and only a small proportion of the publications belong to very small classes. For these reasons, we conclude that the proposed methodology is suitable to determine the topic granularity level of an ACPLC and that the ACPLC identified by this methodology is useful for bibliometric analyses.  相似文献   
123.
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   

124.
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   
125.
126.
127.
128.
129.
130.
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