全文获取类型
收费全文 | 14481篇 |
免费 | 235篇 |
国内免费 | 13篇 |
专业分类
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 |
出版年
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.
Michael M. Ames Author Vitae 《Museum Management and Curatorship》2006,21(3):171-186
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.
Jennifer R. Warren Michael L. Hecht David A. Wagstaff Elvira Elek Khadidiatou Ndiaye Patricia Dustman Flavio F. Marsiglia 《Journal of Applied Communication Research》2006,34(2):209-227
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.
Thanh Tin Tang Nick Craswell David Hawking Kathy Griffiths Helen Christensen 《Information Retrieval》2006,9(2):207-225
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 newssourcesreporters, poll reporting and public documentswhereasthe effects of candidate attribute salience mostly came frompartisan sourcesthe candidate himself and members ofthe competing political party. Possible political implicationsof these findings are discussed. 相似文献
65.
Donsbach Wolfgang; Noelle-Neumann Elisabeth; Traugott Michael W.; Worcester Robert 《Int. Journal of Public Opinion Research》2006,18(3):273-274
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.
David E. Hubbard Sierra Laddusaw Joel Kitchens Rusty Kimball 《The Journal of Academic Librarianship》2018,44(3):404-411
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.