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   1361篇
  免费   31篇
教育   913篇
科学研究   103篇
各国文化   19篇
体育   221篇
综合类   1篇
文化理论   55篇
信息传播   80篇
  2023年   12篇
  2022年   15篇
  2021年   26篇
  2020年   44篇
  2019年   83篇
  2018年   108篇
  2017年   105篇
  2016年   87篇
  2015年   67篇
  2014年   54篇
  2013年   281篇
  2012年   58篇
  2011年   38篇
  2010年   43篇
  2009年   19篇
  2008年   33篇
  2007年   32篇
  2006年   37篇
  2005年   18篇
  2004年   10篇
  2003年   22篇
  2002年   16篇
  2001年   14篇
  2000年   15篇
  1999年   7篇
  1998年   7篇
  1997年   8篇
  1996年   9篇
  1995年   14篇
  1994年   9篇
  1993年   7篇
  1992年   8篇
  1990年   5篇
  1989年   6篇
  1987年   4篇
  1986年   3篇
  1985年   3篇
  1981年   3篇
  1980年   3篇
  1979年   3篇
  1978年   3篇
  1976年   3篇
  1974年   5篇
  1972年   5篇
  1969年   2篇
  1968年   2篇
  1956年   3篇
  1872年   4篇
  1871年   2篇
  1870年   4篇
排序方式: 共有1392条查询结果,搜索用时 140 毫秒
41.
42.
43.
44.
Rashné R. Jehangir challenges her students and herself to engage with tough issues like class, race, gender, disability, and homophobia. How does she help them learn from, and even embrace, the confict that inevitably arises? Read on to find out.  相似文献   
45.
The need of inspecting a masterpiece of fine art without affecting it led to develop non destructive methods of investigation. In the field of art conservation, several diagnostic techniques are being widely used to inspect works of art, giving different but complementary results. The present work deals with two of these methods, reflectography and thermography, both techniques examining objects in the infrared spectrum but in different wavelength bands. Their integrated data potentially provide a powerful tool for mapping hidden features and alterations of artworks. This was confirmed during the inspections of a 13th century panel painting under restoration at the Opificio delle Pietre Dure laboratories (Florence, Italy). A graphical user interface was also designed to aid operators in the field of conservation dealing with the results of the two IR methods. Many options such as image adjustment, comparison, overlaying and transparency variation, in addition to thermographic elaborations, have been made available to users. Imaging data integration provides a multi-layered and multi-spectral representation of the painting that yields a comprehensive diagnosis confirms the anomalies individuation and reduces the ambiguities of information coming from a single diagnostic method.  相似文献   
46.
This study aimed to analyse the effects of a simulated Brazilian jiu-jitsu (BJJ) tournament on vertical jump performance, grip strength test and perceived effort responses. 22 male BJJ athletes participated in a simulated tournament consisting of three 7 min matches separated by 14 min of rest. Kimono grip strength test (KGST), counter movement jump (CMJ) and rate of perceived exertion (RPE) were measured before and after each match, while RPE of specific areas was assessed after three matches. ANOVA for repeated measures was used to compare strength parameters after each match with the level of significance set at 5%. The key results showed a significant decrease of jump height (p = 0.001) and net vertical impulse in the CMJ (p = 0.031), as well as a reduction of the number of reps in the KGST (p < 0.001). A significant increase of RPE was found throughout the matches (p < 0.001). Considering the RPE in specific areas, no differences were observed between the upper and lower body (p = 0.743). We conclude that the BJJ simulated tournament generated a decrease of performance in both upper and lower limbs and provoked a progressive increase in the effort perception over the matches.  相似文献   
47.
The compact disk (CD) player was one of the major audio innovations of the 1980s in the Netherlands. For studies of the temporal and social diffusion pattern of the CD player and the compact disks, both cultural and economic theories about innovations and music consumption are available. In this paper, these theories are combined in six working hypotheses concerning earlier adoption. The empirical analysis includes both time-invariant and time-varying variables and consumer characteristics. Event history analysis, the technique used in this article, enables one to incorporate these kinds of variables simultaneously in a dynamic model. Compared with the diffusion models usually employed by means of longitudinal analysis, event history analysis is a significant improvement in studying the development of the CD market in the Netherlands.  相似文献   
48.
49.
50.
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