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   19361篇
  免费   187篇
  国内免费   18篇
教育   13218篇
科学研究   2801篇
各国文化   220篇
体育   1282篇
综合类   10篇
文化理论   176篇
信息传播   1859篇
  2021年   147篇
  2020年   217篇
  2019年   356篇
  2018年   466篇
  2017年   479篇
  2016年   406篇
  2015年   315篇
  2014年   404篇
  2013年   3871篇
  2012年   384篇
  2011年   379篇
  2010年   352篇
  2009年   318篇
  2008年   353篇
  2007年   376篇
  2006年   320篇
  2005年   329篇
  2004年   305篇
  2003年   277篇
  2002年   269篇
  2001年   289篇
  2000年   296篇
  1999年   284篇
  1998年   191篇
  1997年   198篇
  1996年   224篇
  1995年   222篇
  1994年   205篇
  1993年   190篇
  1992年   240篇
  1991年   240篇
  1990年   239篇
  1989年   263篇
  1988年   210篇
  1987年   210篇
  1986年   241篇
  1985年   245篇
  1984年   231篇
  1983年   220篇
  1982年   214篇
  1981年   168篇
  1980年   160篇
  1979年   210篇
  1978年   191篇
  1977年   185篇
  1976年   161篇
  1975年   129篇
  1974年   163篇
  1973年   148篇
  1971年   149篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
This article describes the ongoing efforts at University of Nevada, Las Vegas (UNLV) Libraries to evolve the role of the institutional repository (IR) and to effectively position it within the context of the Libraries’ collections, research support, and scholarly communication services. A major component of this process is re-examining the fundamental aims of the IR and aligning it to the Libraries and the campus strategic goals. The authors situate UNLV Libraries’ experience within the context of the current literature to provide background and reasoning for our decision to pursue two, at times conflicting, aims for the IR: one for scholarly communication and another for research administration.  相似文献   
112.
Relational transgressions are emotionally difficult for those who directly experience the transgression. Less is known about how transgressions affect those located within the personal network of a relational transgression victim. This study explored how network members engaged in support marshaling in response to another’s transgression experience. Results indicate that some participants marshaled support, citing four reasons for their actions: perceived insufficiency, camaraderie, personal ramifications, and personal values. We explore these reasons for marshaling support and discuss them within the broader context of support marshaling and relational transgressions.  相似文献   
113.
This article explores the existence of a “citizen-centered journalism” that sees citizens as crucial participants in the construction of news and as co-creators of their own worlds. Through qualitative case studies of three news organizations, the article examines the motivation for using a citizen-centered approach, the news routines that are required to do so, the categories of content produced, and the perceived impact of this approach. The results suggest these news organizations are working in partnership with communities and striving to give a voice to historically marginalized communities. The journalists, however, see citizen participation as complementary to professional journalistic routines that favor verifiable information, rather than assigning inherent value to it for its own sake.  相似文献   
114.
115.
116.
ABSTRACT

The literature on momentum is still undecided, with mixed results whether momentum exists or is only perceived to exist (“hot hand fallacy”). We explore whether momentum exists by looking at cases in which a basketball player has three consecutive free throws. A free throw is a well-defined task executed in a stable environment, allegedly giving momentum optimal chances to occur. Taking 14 NBA seasons we collected over 4500 three-free-throw sets (triplets). We obtained the outcomes of the shots as well as some additional variables about the player and the game: the player’s average free-throw percentage, home or away, and the game score and the quarter when the free throws were attempted. We first analyse the hit rates in the three shots and then proceed to regression analysis that also controls for the abovementioned variables. We address several concerns raised in the literature. All comparisons and analyses yield the same conclusion that there is no evidence for momentum in the data.  相似文献   
117.
Neural engineering is an emerging field of high relevance to students, teachers, and the general public. This Feature presents online resources that educators and scientists can use to introduce students to neural engineering and to integrate core ideas from the life sciences, physical sciences, social sciences, computer science, and engineering into the classroom.  相似文献   
118.
119.
Although science has received much attention as a political and educational initiative, students with learning disabilities (LD) perform significantly lower than their nondisabled peers. This meta‐analysis evaluates the effectiveness of instructional strategies in science for students with LD. Twelve studies were examined, summarized, and grouped according to the type of strategy implemented. Effect sizes (ES) were calculated for each study. Across all studies, a mean ES of .78 was obtained, indicating a moderate positive effect on students with LD science achievement. Findings also align with past reviews of inquiry‐based instruction for students with special needs, indicating that students with LD need structure within an inquiry science approach in order to be successful. Additionally, results suggest that mnemonic instruction is highly effective at increasing learning disabled students' acquisition and retention of science facts.  相似文献   
120.
This article summarises previous academic research into university education, distinguishing between arguments for and against improving access. Several views are summarised, including structural‐functionalism, which claims that powerful social groups maintain their status and income, and human capital theory, which focuses on employee productivity. Almost all viewpoints discussed in this article support meritocracy. UK universities differ in their openness to people from disadvantaged backgrounds. Many universities, referred to here as ‘inclusive’, deserve credit for encouraging disadvantaged people to become students; in contrast, ‘exclusive’ universities tend to have fewer disadvantaged students than expected. There are barriers facing disadvantaged students, including unequal access to universities, which can at least partly be explained by private schools for rich pupils and financial burdens at university causing some students to take paid work (reducing time available for study). The UK spends less per student on universities than the world average and less than half as much as some European countries. The UK Government could increase university funding, concentrating on universities that are most inclusive and that tend to have the largest problems in affording sufficient staff and teaching facilities. This investment would give long‐term benefits to the UK economy.  相似文献   
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