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   1717篇
  免费   18篇
  国内免费   11篇
教育   1049篇
科学研究   123篇
各国文化   8篇
体育   405篇
综合类   3篇
文化理论   28篇
信息传播   130篇
  2024年   11篇
  2023年   16篇
  2022年   31篇
  2021年   44篇
  2020年   43篇
  2019年   68篇
  2018年   97篇
  2017年   87篇
  2016年   92篇
  2015年   44篇
  2014年   58篇
  2013年   202篇
  2012年   82篇
  2011年   73篇
  2010年   75篇
  2009年   60篇
  2008年   60篇
  2007年   56篇
  2006年   67篇
  2005年   55篇
  2004年   42篇
  2003年   31篇
  2002年   38篇
  2001年   33篇
  2000年   21篇
  1999年   22篇
  1998年   24篇
  1997年   17篇
  1996年   10篇
  1995年   8篇
  1994年   8篇
  1993年   8篇
  1992年   11篇
  1991年   8篇
  1990年   14篇
  1989年   7篇
  1988年   7篇
  1987年   5篇
  1986年   8篇
  1985年   5篇
  1984年   11篇
  1983年   5篇
  1982年   4篇
  1981年   5篇
  1980年   5篇
  1979年   9篇
  1978年   5篇
  1977年   4篇
  1975年   11篇
  1974年   6篇
排序方式: 共有1746条查询结果,搜索用时 15 毫秒
991.
Zomer AH  Jongbloed BW  Enders J 《Minerva》2010,48(3):331-353
As public research organisations are increasingly driven by their national and regional governments to engage in knowledge transfer, they have started to support the creation of companies. These research based spin-off companies (RBSOs) often keep contacts with the research institutes they originate from. In this paper we present the results of a study of four research institutes within two universities and two non-university public research organisations (PROs) in the Netherlands. We show that research organisations have distinct motivations to support the creation of spin-off companies. In terms of resources RBSOs contribute, mostly in a modest way, to research activities by providing information, equipment and monetary resources. In particular, RBSOs are helpful for researchers competing for research grants that demand participation of industry. Furthermore, RBSOs may be seen as a proactive response by Dutch public research organisations to demands of economic relevance from their institutional environment. RBSOs enhance the prestige of their parent organisations and create legitimacy for public funds invested in PROs. At the same time, most RBSOs do not have a significant impact on the direction of the research conducted at the PROs.  相似文献   
992.
  总被引:5,自引:0,他引:5  
In this study, we examined anabolic and catabolic hormone responses to a single endurance rowing training session in 12 male competitive single scull rowers. A work intensity eliciting a blood lactate concentration of 4 mmol(-1) was determined on a rowing ergometer during an endurance rowing training session lasting about 2 h (7891+/-761 s; distance covered 22.6+/-2.5 km; heart rate 136+/-7 beats x min(-1); intensity 77.4+/-3.8% of anaerobic threshold; mean +/- s). Venous blood samples were obtained before and after on-water rowing. Cortisol, testosterone and sex hormone binding globulin were measured and free testosterone and the free testosterone: cortisol ratio calculated. Blood lactate concentration did not change significantly during training (from 1.7+/-0.4 to 1.9+/-0.4 mmol x l(-1)); however, body mass was reduced (from 82.0+/-10.8 to 80.6+/-11.2 kg) and was related to the distance covered (r = -0.75). The concentrations of cortisol and testosterone did not change significantly during rowing or in the first 2 h of recovery. Free testosterone was reduced in the first 2 h of recovery, but no significant changes were observed in the free testosterone: cortisol ratio. Immediately after rowing, the concentrations of cortisol (r = 0.49) and free testosterone (r = -0.58) were related to the distance covered. Our findings indicate that a prolonged low-intensity training session results in a similar anabolic and catabolic hormone stimulus for trained rowers.  相似文献   
993.
994.
995.
    
  相似文献   
996.
997.
In this paper, we describe the institutional framework in which heavy subsidization of German classical orchestras takes place and provide figures on the structure and the level of public support. Moreover, we derive and test various hypotheses concerning the political-economic determinants of public orchestra support. We analyze the political support-maximizing calculus of local politicians – the relevant decision-makers for orchestra subsidization in Germany. We find that public funding increases with increasing population; public debt and budget figures exert strong influences on the level of support. In addition, conservative and liberal politicians tend to support classical orchestras more than Social Democratic and Green politicians do.  相似文献   
998.
    
  相似文献   
999.
    
  相似文献   
1000.
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