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   14481篇
  免费   235篇
  国内免费   13篇
教育   10661篇
科学研究   867篇
各国文化   259篇
体育   1178篇
综合类   7篇
文化理论   234篇
信息传播   1523篇
  2022年   75篇
  2021年   147篇
  2020年   302篇
  2019年   403篇
  2018年   502篇
  2017年   563篇
  2016年   533篇
  2015年   370篇
  2014年   424篇
  2013年   3118篇
  2012年   403篇
  2011年   420篇
  2010年   359篇
  2009年   333篇
  2008年   459篇
  2007年   385篇
  2006年   356篇
  2005年   354篇
  2004年   287篇
  2003年   318篇
  2002年   290篇
  2001年   238篇
  2000年   221篇
  1999年   178篇
  1998年   171篇
  1997年   192篇
  1996年   200篇
  1995年   182篇
  1994年   188篇
  1993年   156篇
  1992年   188篇
  1991年   162篇
  1990年   162篇
  1989年   140篇
  1988年   144篇
  1987年   113篇
  1986年   120篇
  1985年   133篇
  1984年   119篇
  1983年   134篇
  1982年   119篇
  1981年   115篇
  1980年   122篇
  1979年   119篇
  1978年   99篇
  1977年   72篇
  1976年   76篇
  1975年   61篇
  1974年   51篇
  1973年   38篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
Museums are not usually seen to be agents of change. If they are to serve as important mechanisms for empowering local communities to define, recognize, and develop their own indigenous heritages, they should first consider a potential contradiction contained within this initiative: museums specialize in the representation of other peoples, while people have the sovereign right to represent themselves. Left unresolved, this contradiction could produce counterfeits of good intentions. The introduction of professionalized cultural management may mitigate the responsibilities of the citizenry to actively participate in the production and preservation of their own heritage.  相似文献   
62.
This study sought to determine if exposure to two communication-oriented activities, videotapes and public service announcements, accounts for changes in substance use among adolescents participating in the Drug Resistance Strategies Project's keepin' it REAL adolescent substance use prevention curriculum. Middle-school students (4,734, 72% Latino) responded to questionnaires related to these analyses. An analysis of covariance (ANCOVA) model was fit separately to six substance use outcomes. The results suggested that intervention students who saw four or five videos engaged in less substance use in the past month than did students who saw fewer videos. Having seen the PSAs one or more times did not predict the reported change in substance use.  相似文献   
63.
When searching for health information, results quality can be judged against available scientific evidence: Do search engines return advice consistent with evidence based medicine? We compared the performance of domain-specific health and depression search engines against a general-purpose engine (Google) on both relevance of results and quality of advice. Over 101 queries, to which the term ‘depression’ was added if not already present, Google returned more relevant results than those of the domain-specific engines. However, over the 50 treatment-related queries, Google returned 70 pages recommending for or against a well studied treatment, of which 19 strongly disagreed with the scientific evidence. A domain-specific index of 4 sites selected by domain experts was only wrong in 5 of 50 recommendations. Analysis suggests a tension between relevance and quality. Indexing more pages can give a greater number of relevant results, but selective inclusion can give better quality.  相似文献   
64.
This study examined two levels of media agenda effects on aggregatepublic opinion from different news sources. The effects wereinvestigated immediately and cumulatively. Content analysisdata from the 2000 U.S. presidential election coverage by fournational news organizations were related to the Gallup pre-electionpoll standings of each candidate. Regression analyses foundthat both the salience of a candidate and the salience of theattributes of a candidate cumulatively, but not immediately,influenced his standing in the polls. An analysis of news sourcessupported the finding that the two levels of agenda-settingeffects seemed mostly cumulative rather than immediate. Newsfrom different sources, however, tended to have effects of differentdegrees and sometimes different directions on candidate pollstandings. Cumulative effects of candidate salience on aggregateopinion change were found for non-partisan and neutral newssources—reporters, poll reporting and public documents—whereasthe effects of candidate attribute salience mostly came frompartisan sources—the candidate himself and members ofthe competing political party. Possible political implicationsof these findings are discussed.  相似文献   
65.
Editorial     
This issue of the Journal contains three interesting articlesabout central aspects of public opinion research, as well asan equal number of research notes that reflect the range oftopics that interest all public opinion researchers. Toshio Takeshita takes a turn at reconceptualizing agenda-settingstudies, using a taxonomy  相似文献   
66.
67.
In this essay, we respond to the narratives and essays in this issue by examining organizational power issues related to researchers and institutional research boards (IRBs). Rather than taking a singular perspective on power, we use multiple perspectives and suggest that the cumulative analyses provide the best understanding of IRBs and organizational power.  相似文献   
68.
69.
Academic libraries are increasingly seeking ways to demonstrate their impact on student learning. Acknowledgments - formal statements of indebtedness – in graduate theses and dissertations provide a rather unexplored area for demonstrating impact of the academic library on student learning. This study uses quantitative and qualitative methods to characterize acknowledgments of the Texas A&M University Libraries (TAMU Libraries) in theses and dissertations, both overall and for three disciplines specifically: civil engineering, geography, and history. This study also searched for mentions of the TAMU Libraries throughout the entire body of theses and dissertations. Overall, acknowledgments to the TAMU Libraries in theses and dissertations were less than 1%, though acknowledgments were found in all three disciplines with over a quarter of the history theses and dissertations containing an acknowledgment to libraries. There was no statistically significant difference found between the numbers of acknowledgments in theses versus dissertations. Acknowledgments to the TAMU Libraries were found in the theses and dissertations of 28 different departments. Mentions to the TAMU Libraries – not necessarily a formal acknowledgment – were found throughout the text of theses and dissertations with most concentrated in the acknowledgment, method, and bibliography sections.  相似文献   
70.
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