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   298篇
  免费   4篇
  国内免费   1篇
教育   154篇
科学研究   47篇
各国文化   2篇
体育   32篇
文化理论   30篇
信息传播   38篇
  2023年   2篇
  2022年   3篇
  2021年   4篇
  2020年   13篇
  2019年   25篇
  2018年   13篇
  2017年   24篇
  2016年   26篇
  2015年   6篇
  2014年   22篇
  2013年   43篇
  2012年   20篇
  2011年   10篇
  2010年   12篇
  2009年   4篇
  2008年   5篇
  2007年   7篇
  2006年   6篇
  2005年   5篇
  2004年   3篇
  2003年   2篇
  2002年   7篇
  2001年   2篇
  2000年   7篇
  1998年   3篇
  1997年   2篇
  1996年   4篇
  1995年   3篇
  1994年   4篇
  1993年   2篇
  1992年   3篇
  1991年   3篇
  1990年   1篇
  1989年   1篇
  1988年   1篇
  1985年   1篇
  1983年   1篇
  1981年   2篇
  1979年   1篇
排序方式: 共有303条查询结果,搜索用时 133 毫秒
211.
212.

Using cultural studies and media ecology perspectives, I analyze data collected from 15 Generation Xers about how they remember and understand the roles played by family and news media in the development of their politics-what is usually referred to as political socialization. This study suggests that news media are understood best not as discrete agents of influence, but rather as environments within which individuals develop politically. It finds that news media are of subtle-but-fundamentally powerful ecological importance, not just because news media engagement interrelates with, and takes place in the context of, institutions and phenomena like the family, but because all aspects of the larger culture and society-including family-are themselves shaped by mass media. Future scholarship should denote and more fully explore this fruitful tension between the cultural studies theorization of subjectivity and agency, and the media ecology theorization of media as environments with structuring biases.  相似文献   
213.
214.
215.
216.
The International Federation for the Promotion of Mechanism and Machine Science(IFToMM)held the International Symposium on Robotics and Mechatronics(ISRM 2009)as the first in a series of conference events promoting robotics and mechantronics in the Asian IFToMM community.The first event was held in Hanoi University of Technology on Sept.21-23.2009.  相似文献   
217.
This study surveyed a sample of 188 elementary teachers with respect to their preference for information regarding educational planning, in particular information captured with dynamic testing procedures. The influence of teachers’ experience and sense of efficacy on teachers’ preferences was also investigated. Results indicated teachers’ preferences for dynamically gathered information regarding children’s learning processes, next to standard information such as a diagnosis. Appreciation for dynamic testing information appeared to be relatively higher for those teachers with longer teaching experience, but not related to teachers’ sense of efficacy. Findings are discussed with regard to their implications for both diagnostic and teaching practices.  相似文献   
218.
The purpose of this study was to analyze pedaling cadence, pedal forces, and muscle activation of triathletes during cycling to exhaustion. Fourteen triathletes were assessed at the power output level relative to their maximal oxygen uptake (355 +/- 23 W). Cadence, pedal forces, and muscle activation were analyzed during start, middle, and end test stages. Normal and tangential forces increased from the start to the end of the test (-288 +/- 33 to -352 +/- 42 N and -79 +/- 45 to -124 +/- 68 N, respectively) accompanied by a decrease in cadence (96 +/- 5 to 86 +/- 6 rpm). Muscle activation increased from the start to the middle and the end in the gluteus maximus (27 +/- 5.5% and 76 +/- 9.3%) and in the vastus lateralis (13 +/- 3.5% and 27 +/- 4.4%), similar increase was observed from the start to the end in the rectus femoris and the vastus medialis (50 +/- 9.3% and 20 +/- 5.7%, respectively). Greater normal force along with enhanced activation of knee and hip extensor muscles is linked with fatigue and declines in cadence of triathletes during cycling to exhaustion.  相似文献   
219.
The paper considers a class of neural networks where flux-controlled dynamic memristors are used in the neurons and finite concentrated delays are accounted for in the interconnections. Goal of the paper is to thoroughly analyze the nonlinear dynamics both in the flux-charge domain and in the current-voltage domain. In particular, a condition that is expressed in the form of a linear matrix inequality, and involves the interconnection matrix, the delayed interconnection matrix, and the memristor nonlinearity, is given ensuring that in the flux-charge domain the networks possess a unique globally exponentially stable equilibrium point. The same condition is shown to ensure exponential convergence of each trajectory toward an equilibrium point in the voltage-current domain. Moreover, when a steady state is reached, all voltages, currents and power in the networks vanish, while the memristors act as nonvolatile memories keeping the result of computation, i.e., the asymptotic values of fluxes. Differences with existing results on stability of other classes of delayed memristor neural networks, and potential advantages over traditional neural networks operating in the typical voltage-current domain, are discussed.  相似文献   
220.
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