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   1888篇
  免费   38篇
教育   1380篇
科学研究   139篇
各国文化   14篇
体育   177篇
文化理论   16篇
信息传播   200篇
  2022年   14篇
  2021年   14篇
  2020年   37篇
  2019年   81篇
  2018年   86篇
  2017年   83篇
  2016年   60篇
  2015年   42篇
  2014年   60篇
  2013年   398篇
  2012年   40篇
  2011年   39篇
  2010年   33篇
  2009年   33篇
  2008年   38篇
  2007年   33篇
  2006年   46篇
  2005年   29篇
  2004年   38篇
  2003年   36篇
  2002年   31篇
  2001年   30篇
  2000年   42篇
  1999年   34篇
  1998年   17篇
  1997年   26篇
  1996年   19篇
  1995年   13篇
  1994年   26篇
  1993年   20篇
  1992年   22篇
  1991年   16篇
  1990年   16篇
  1989年   21篇
  1988年   13篇
  1987年   13篇
  1986年   13篇
  1985年   19篇
  1984年   18篇
  1983年   20篇
  1982年   9篇
  1981年   15篇
  1980年   11篇
  1979年   19篇
  1978年   8篇
  1977年   9篇
  1974年   8篇
  1972年   9篇
  1927年   8篇
  1926年   10篇
排序方式: 共有1926条查询结果,搜索用时 15 毫秒
1.
Working memory training improves children's cognitive performance on untrained tasks; however, little is known about the underlying neural mechanisms. This was investigated in 32 typically developing children aged 10–14 years (19 girls and 13 boys) using a randomized controlled design and multi-modal magnetic resonance imaging (Devon, UK; 2015–2016). Training improved working memory performance and increased intrinsic functional connectivity between the bilateral intraparietal sulci. Furthermore, improvements in working memory were associated with greater recruitment of the left middle frontal gyrus on a complex span task. Repeated engagement of fronto-parietal regions during training may increase their activity and functional connectivity over time, affording greater working memory performance. The plausibility of generalizable cognitive benefits from a neurobiological perspective and implications for neurodevelopmental theory are discussed.  相似文献   
2.
Abstract

Carnosine was originally discovered in skeletal muscle, where it exists in larger amounts than in other tissues. The majority of research into the physiological roles of carnosine have been conducted on skeletal muscle. Given this and the potential for muscle carnosine content to be increased with supplementation, there is now a large body of research examining the ergogenic effects (or otherwise) of carnosine. More recent research, however, points towards a potential for carnosine to exert a wider range of physiological effects in other tissues, including the brain, heart, pancreas, kidney and cancer cells. Taken together, this is suggestive of a potential for carnosine to have therapeutic benefits in health and disease, although this is by no means without complication. Herein, we will provide a review of the current literature relating to the potential therapeutic effects of carnosine in health and disease.  相似文献   
3.
Technologies of Humility: Citizen Participation in Governing Science   总被引:5,自引:0,他引:5  
Jasanoff  Sheila 《Minerva》2003,41(3):223-244
Building on recent theories ofscience in society, such as that provided bythe `Mode 2' framework, this paper argues thatgovernments should reconsider existingrelations among decision-makers, experts, andcitizens in the management of technology.Policy-makers need a set of `technologies ofhumility' for systematically assessing theunknown and the uncertain. Appropriate focalpoints for such modest assessments are framing,vulnerability, distribution, and learning.  相似文献   
4.
5.
6.
7.
One of the highest priorities in today's hospitals is the provision of quality care to patients. The medical librarian has an increased responsibility to furnish quality information to the medical staff. Traditional methods of reference service continue to work well, but it is increasingly important for librarians to become more directly involved in hospital quality assurance (QA) activities. Occurrence screening is one system of QA where the librarian can make a difference.  相似文献   
8.
Drawing on components of agenda-setting theory and the two-step flow of information from mass media to news audiences, this study examines the effects of mass and interpersonal communication on breast cancer screening practices among college- and middle-aged women (n = 284). We theorized that screening behaviors among younger women would be influenced more by interpersonal sources of information while screening among middle-aged women would be more influenced by exposure to mass-mediated information. Findings supported anticipated patterns, revealing important and varying roles for both mass and interpersonal communication in the health behaviors of women. Implications for health practitioners and campaign planners, as well as recommendations for future research, are discussed.  相似文献   
9.
10.
As academic libraries' budgets remain flat while their expenditures rise, library leaders must seek out alternative sources of funding. One option is a mandatory student fee dedicated to the library. This article presents the results of a survey of 152 deans and directors of public R1 and R2 research universities that were asked whether their libraries benefit from mandatory student fees. While a library-specific fee is unusual, nearly half of responding libraries are eligible to receive some portion of another mandatory student fee. Study results can serve as evidence for libraries preparing to make a case for the significant, positive impact possible through even a modest library fee.  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