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   121篇
  免费   0篇
教育   63篇
科学研究   11篇
各国文化   2篇
体育   20篇
文化理论   5篇
信息传播   20篇
  2023年   1篇
  2022年   3篇
  2021年   1篇
  2020年   3篇
  2019年   5篇
  2018年   6篇
  2017年   8篇
  2016年   6篇
  2015年   2篇
  2014年   5篇
  2013年   16篇
  2012年   6篇
  2011年   4篇
  2010年   3篇
  2009年   4篇
  2008年   9篇
  2007年   3篇
  2006年   5篇
  2005年   2篇
  2004年   5篇
  2003年   4篇
  2002年   1篇
  2001年   1篇
  2000年   3篇
  1999年   2篇
  1998年   2篇
  1997年   1篇
  1990年   1篇
  1988年   1篇
  1984年   1篇
  1976年   1篇
  1973年   2篇
  1972年   1篇
  1971年   1篇
  1970年   1篇
  1967年   1篇
排序方式: 共有121条查询结果,搜索用时 78 毫秒
31.
One likely mechanism in learning new skills is change in synchronous connections between distributed neural networks, which can be measured by coherence analysis of electroencephalographic patterns. This study examined coherence changes during the learning of two tasks, a word association task and a figure association task. Although learning curves were similar for both tasks, distinct patterns of coherence change were observed. Coherence tended to increase as learning progressed in the figure association task. In contrast, coherence tended to decrease in the word association task, especially within hemisphere. Word learning was coupled with negative intrahemispheric and positive interhemispheric performance–coherence relations in the gamma frequency. Unique to the figure learning task was an increase in the number of positive coherence–performance relations in both delta and theta frequencies across blocks. Results are discussed in light of ongoing efforts to identify the mechanisms that coordinate distributed brain activities during the process of learning. Further research is needed to define patterns of coherence change for different tasks, goals, and brain regions.  相似文献   
32.
Models in software engineering - an introduction   总被引:1,自引:0,他引:1  
Modelling is a concept fundamental for software engineering. In this paper, the word is defined and discussed from various perspectives. The most important types of models are presented, and examples are given. Models are very useful, but sometimes also dangerous, in particular to those who use them unconsciously. Such problems are shown. Finally, the role of models in software engineering research is discussed.Received: 21 October 2002, Accepted: 10 January 2003,  相似文献   
33.
Modelling is a concept fundamental for software engineering. In this paper, the word is defined and discussed from various perspectives. The most important types of models are presented, and examples are given. Models are very useful, but sometimes also dangerous, in particular to those who use them unconsciously. Such problems are shown. Finally, the role of models in software engineering research is discussed.  相似文献   
34.
Software for calculating blood lactate endurance markers   总被引:2,自引:2,他引:0  
Blood lactate markers are used as summary measures of the underlying model of an athlete's blood lactate response to increasing work rate. Exercise physiologists use these endurance markers, typically corresponding to a work rate in the region of high curvature in the lactate curve, to predict and compare endurance ability. A short theoretical background of the commonly used markers is given and algorithms provided for their calculation. To date, no free software exists that allows the sports scientist to calculate these markers. In this paper, software is introduced for precisely this purpose that will calculate a variety of lactate markers for an individual athlete, an athlete at different instants (e.g. across a season), and simultaneously for a squad.  相似文献   
35.
36.
37.
The past three decades have witnessed a sharp reduction in the rate of growth of public research funding, and sometimes an actual decline in its level. In many countries, this decline has been accompanied by substantial changes in the ways that such funding has been allocated and monitored. In addition, the institutions governing how research is directed and conducted underwent significant reforms. In this paper we examine how these changes have affected scientists’ research goals and practices by comparing the development of three scientific innovations (one each in physics, biology, and educational research) in four European countries, namely Germany, the Netherlands, Switzerland, and Sweden. We find that the increased number of actors exercising authority over research goals does not necessarily lead to a greater diversity of interests funding research. A narrowing of goals and frameworks is especially probable when the increasing importance of external project funding is combined with reductions in state financing of universities and public research institutes. Finally, the growing standardisation of project cycle times and resource packages across funding agencies and scientific communities make it more difficult for researchers to pursue projects that deviate from these norms, especially, if they challenge mainstream beliefs and assessment criteria.  相似文献   
38.
The aim of this paper is to initiate a discussion about links between epistemic properties and institutional conditions for research by providing an exploratory analysis of such links featured by projects funded by the European Research Council (ERC). Our analysis identifies epistemic properties of research processes and links them to necessary and favourable conditions for research, and through these to institutional conditions provided by grants. Our findings enable the conclusion that there is research that is important for the progress of a field but is difficult to fund with common project grants. The predominance and standardisation of grant funding, which can be observed about many European countries, appears to reduce the chances of unconventional projects across all disciplines. Funding programmes of the ‘ERC-type’ (featuring large and flexible budgets, long time horizons, and risk-tolerant selection processes) constitute an institutional innovation because they enable such research. However, while the ERC funding and other new funding schemes for exceptional research attempt to cover these requirements, they are unlikely to suffice.  相似文献   
39.
40.
The overall mission of the Conservatoire national des arts et métiers—(CNAM) [National Conservatory of Industrial Arts and Trades] is outlined. One of its centers, the Centre national de l'entrepreneuriat—(CNE) [National Center for Entrepreneurship] is described in greater detail. In particular, this center offers various services, notably training and retraining, to small entrepreneurs, including distance training via a virtual training system, @ppui©. It also offers a range of entrepreneurial consultation services to small and to very small businesses and to regional institutions.  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