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   60篇
  免费   3篇
教育   34篇
科学研究   15篇
各国文化   1篇
体育   5篇
文化理论   2篇
信息传播   6篇
  2022年   1篇
  2021年   2篇
  2020年   4篇
  2019年   6篇
  2018年   2篇
  2017年   6篇
  2016年   4篇
  2015年   3篇
  2014年   3篇
  2013年   12篇
  2012年   3篇
  2011年   5篇
  2010年   2篇
  2008年   2篇
  2007年   1篇
  2006年   1篇
  2005年   1篇
  2004年   3篇
  2003年   1篇
  2002年   1篇
排序方式: 共有63条查询结果,搜索用时 15 毫秒
61.
The sculptural polychromy in the Zhongshan Grottoes, sited in northwest China, has been investigated in terms of chemical composition of employed materials and pigments, state of conservation and painting technique. Raman analysis, Fourier-transform infrared analysis, analysis through energy-dispersive X-ray spectrometry coupled to scanning electron microscopy and pyrolysis coupled to gas chromatography and mass spectrometry were applied. Six analyzed samples showed silicates and kaolin as main components of the ground layers. Also lead white has been found in these layers. Minium, red-earth and mercury sulfide are the red pigments detected in the polychromy. A mixed use of malachite and atacamite has been detected in three green samples. Optical characteristics of atacamite and malachite found in the samples indicate a synthetic origin. The presence of a synthetic organic pigment such as phthalocyanine chlorinated pigment was also revealed. Ultramarine blue pigment, obtained by purification of lapis lazuli, has been detected in the blue sample. As for the binders used, fatty materials and siccative oil were found.  相似文献   
62.
While the Los Angeles Olympic Games in 1984 constituted Romania's best performance ever, 2012 London Olympic Games were characterised by the worst performance in its history. During the time between these two events, the country went from being a communist regime to a liberal government. This transition invites consideration of the transformation Romania's sports policy underwent and its repositioning with regard to the Olympic Movement, both before and after the 1989 turning point. Analysis suggests that, in failing to professionalise Romanian sport, the Romanian Olympic and Sports Committee (COSR) was tempted to readopt a model of state-financed sport, with the aim of reinstating the nation to its former position among the world's sporting elite.  相似文献   
63.
Purpose: This study explores the potential of the Farm Accountancy Data Network (FADN) to assess the technical, economic and environmental effects of cooperative innovation projects at farm level.

Design/Methodology/Approach: The analysis of the FADN potential relies on the classification of innovations and the co-identification, through the Most Significant Change (MSC) approach, of the most relevant indicators for tracking and assessing the performances of innovations and attributing to them the effects of a specific innovation.

Findings: The study shows that the FADN has a certain range of useful indicators and that they have a good coverage of the different types of innovation. Furthermore, the farm visits let emerge the importance of participatory approaches to capture the different changes and interplays occurred in farming processes.

Practical implications: The paper lays the foundations for the adaptation of the current methodology for data collecting and provides useful insights concerning the overcoming representativeness claims, costs’ issues, and problems related to the observation time limit.

Theoretical implications: The paper reveals the importance of participatory monitoring and evaluation approaches in helping the collection of more robust and relevant account data on farm, as well as in attributing certain results to a specific innovation and recognising synergies and side-effects of cooperative processes.

Originality/Values: The paper provides some recommendations on how to enlarge the scope of the FADN survey in order to be used effectively in the analysis of the performance of cooperative innovations at farm level.  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