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   29737篇
  免费   432篇
  国内免费   19篇
教育   20992篇
科学研究   2881篇
各国文化   376篇
体育   2328篇
综合类   14篇
文化理论   221篇
信息传播   3376篇
  2022年   211篇
  2021年   315篇
  2020年   461篇
  2019年   729篇
  2018年   1002篇
  2017年   948篇
  2016年   844篇
  2015年   515篇
  2014年   773篇
  2013年   5764篇
  2012年   765篇
  2011年   778篇
  2010年   595篇
  2009年   582篇
  2008年   655篇
  2007年   593篇
  2006年   528篇
  2005年   506篇
  2004年   479篇
  2003年   440篇
  2002年   420篇
  2001年   574篇
  2000年   492篇
  1999年   446篇
  1998年   273篇
  1997年   275篇
  1996年   317篇
  1995年   290篇
  1994年   233篇
  1993年   280篇
  1992年   414篇
  1991年   394篇
  1990年   391篇
  1989年   378篇
  1988年   328篇
  1987年   389篇
  1986年   347篇
  1985年   393篇
  1984年   317篇
  1983年   300篇
  1982年   277篇
  1981年   231篇
  1980年   232篇
  1979年   352篇
  1978年   265篇
  1977年   244篇
  1976年   221篇
  1975年   192篇
  1974年   207篇
  1971年   188篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
92.
Academic libraries have to a large extent taken the lead in facilitating new approaches to research data management, but changes to the research data landscape have had an impact on numerous areas of academic work, including ethics review. Using interpretive phenomenological analysis of interviews with chairs of Canadian research ethics boards, this study explores how ethics review boards have experienced changes to data policy and related technologies in order to describe the ethical implications of new approaches to data management and to explore ways in which the library, ethics review boards, and other campus partners might harmonize efforts to support emerging data practices. While ethics review boards in Canada are keenly aware of open data policies, data publishing in practice is still nascent. There is uncertainty about the adoption of changing technologies for research and their impacts on privacy protection. Where responsibility lies for addressing these uncertainties is often unclear. Academic libraries and research ethics boards are well-suited to engage in mutual knowledge transfer and to integrate data management planning and ethics review processes. Institutional-level oversight that includes all campus departments impacted by changes to the research data landscape may facilitate improved communication and reduce role ambiguity.  相似文献   
93.
History and case study are two diachronic research strategies commonly used to study political discourse as it relates to public libraries. Though suitable for some studies, these strategies are inexhaustive. A new, blended research strategy is therefore needed to accomplish what history and case study alone cannot. This hybrid strategy, historical case study, must analyze cases from the distant past to the present, using eclectic data sources, in order to produce both idiographic and nomothetic knowledge. To develop historical case study, the universal components of diachronic analysis are first identified. A general research design for historical case study is then introduced. Finally, historical case study is tested in an actual research project. Findings from this project reveal that historical case study is a successful diachronic research strategy. Historical case study is a new and valuable research design suitable for addressing questions related to change, continuity, development, and evolution.  相似文献   
94.
95.
96.
Digital inclusion is a strategy pursued to foster social inclusion of those who have been sidelined from the mainstream of information society due to lack of access to digital technologies and the skills to use them. Libraries have been working to close the gap by providing access to computers, the Internet, digital content, and digital literacy programs. However, research reveals a new type of divide where digitally competent people could be digitally excluded. This shows the need for a better conceptualization of access and literacy. This paper commits to exploring the concept of access to digital content from the perspective of people with print disability. It involved in-depth interviews with ten participants with print disability where the International Classification of Functioning, Disability, and Health was used as a framework for data analysis. The overall analysis shows that digital inclusion would be more meaningful if it involved providing content in alternative formats and empowering users to make informed choices. Issues such as flexibility and adaptability in content presentation and design of content discovery tools are among those discussed.  相似文献   
97.
Tracing the closure of oceans with irregular margins and the formation of an orocline are crucial for understanding plate reconstruction and continental assembly.The eastern Central Asian Orogenic Belt,where the Mongol-Okhotsk orocline is situated,is one of the world’s largest magmatic provinces.Using a large data set of U-Pb zircon ages,we updated the timing of many published igneous rocks,which allowed us to recognize tightly ’folded’ linear Carboniferous-Jurassic magmatic belts that wrap arou...  相似文献   
98.
99.
100.
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