全文获取类型
收费全文 | 26451篇 |
免费 | 337篇 |
国内免费 | 126篇 |
专业分类
教育 | 18548篇 |
科学研究 | 2802篇 |
各国文化 | 319篇 |
体育 | 2218篇 |
综合类 | 15篇 |
文化理论 | 296篇 |
信息传播 | 2716篇 |
出版年
2021年 | 211篇 |
2020年 | 413篇 |
2019年 | 594篇 |
2018年 | 800篇 |
2017年 | 760篇 |
2016年 | 737篇 |
2015年 | 503篇 |
2014年 | 641篇 |
2013年 | 5049篇 |
2012年 | 582篇 |
2011年 | 633篇 |
2010年 | 505篇 |
2009年 | 482篇 |
2008年 | 589篇 |
2007年 | 555篇 |
2006年 | 546篇 |
2005年 | 516篇 |
2004年 | 462篇 |
2003年 | 480篇 |
2002年 | 433篇 |
2001年 | 425篇 |
2000年 | 430篇 |
1999年 | 419篇 |
1998年 | 286篇 |
1997年 | 290篇 |
1996年 | 327篇 |
1995年 | 307篇 |
1994年 | 267篇 |
1993年 | 251篇 |
1992年 | 345篇 |
1991年 | 355篇 |
1990年 | 353篇 |
1989年 | 374篇 |
1988年 | 323篇 |
1987年 | 322篇 |
1986年 | 305篇 |
1985年 | 340篇 |
1984年 | 303篇 |
1983年 | 312篇 |
1982年 | 256篇 |
1981年 | 256篇 |
1980年 | 250篇 |
1979年 | 343篇 |
1978年 | 274篇 |
1977年 | 244篇 |
1976年 | 220篇 |
1975年 | 188篇 |
1974年 | 203篇 |
1973年 | 180篇 |
1971年 | 160篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
This article first looks at the relationship between museums and art galleries and their potential audiences and, in particular, the under-represented sector of young visitors. It examines the main findings from the limited research available on young visitors, and goes on to discuss theories delineating the differences between the cultures, identities and values of culture consumers and culture providers. The second part of the article looks at what specific museums have done towards being more inclusive in their appeal, and then reports the findings of a survey of young people in relation to New Zealand's Auckland Art Gallery. The survey found that young people's ideas of what constitutes modern, relevant art do not match standard art criteria, and that most exhibitions and marketing methods do not mesh with their worldview. The article concludes by using data from the survey to suggest ways of engaging more young people with public art galleries. 相似文献
65.
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
66.
67.
68.
This paper analyses the publication patterns of researchers in the field of applied sciences at Universities of Technology in South Africa. Aspects investigated include publications in SCOPUS-listed journals; number of citations and countries of publication. Collaborative research patterns at national and international levels were also investigated. A bibliometric analysis approach was followed using SCOPUS as the main source of data and analysing the articles published in selected applied science disciplines. Results show that researchers in the field of applied sciences in universities of technology have increased their number of publications over the past 10?years and are also working in conjunction with other researchers both nationally and internationally. The analysis is an important addition to the field in South Africa which helps in measuring how institutions are positively responding to government incentives in research. The results are also important to information professionals who are increasingly playing an important role in research impact assessments. 相似文献
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.
Carmen Cole Angela R. Davis Vanessa Eyer John J. Meier 《The Journal of Academic Librarianship》2018,44(3):419-425
In 2008 Meier and Conkling first tested Google Scholar's coverage of the engineering literature against citations gathered from the Compendex database. Since that time, other studies have used the same methodology and found improvement in Google Scholar's coverage. This study uses engineering dissertations from Proquest Dissertations & Theses to create a data set of citations for the comparison of fee-based databases, Compendex and Scopus, against Google Scholar. From 1950 to 2017 Google Scholar outperformed both Compendex and Scopus in discoverability of citations in nine engineering subjects. These results have implications for collection management and information literacy program planning for librarians. 相似文献