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   12997篇
  免费   47篇
  国内免费   1篇
教育   10047篇
科学研究   1244篇
各国文化   18篇
体育   455篇
文化理论   394篇
信息传播   887篇
  2024年   2篇
  2023年   27篇
  2022年   20篇
  2021年   50篇
  2020年   60篇
  2019年   99篇
  2018年   2284篇
  2017年   2193篇
  2016年   1663篇
  2015年   175篇
  2014年   201篇
  2013年   396篇
  2012年   278篇
  2011年   736篇
  2010年   865篇
  2009年   469篇
  2008年   675篇
  2007年   1171篇
  2006年   93篇
  2005年   415篇
  2004年   464篇
  2003年   379篇
  2002年   141篇
  2001年   14篇
  2000年   28篇
  1999年   9篇
  1998年   10篇
  1997年   23篇
  1996年   7篇
  1995年   8篇
  1994年   2篇
  1993年   7篇
  1992年   7篇
  1991年   10篇
  1990年   8篇
  1989年   3篇
  1988年   5篇
  1987年   2篇
  1986年   2篇
  1984年   2篇
  1983年   3篇
  1982年   4篇
  1981年   2篇
  1980年   4篇
  1979年   2篇
  1978年   5篇
  1976年   6篇
  1975年   3篇
  1973年   2篇
  1970年   2篇
排序方式: 共有10000条查询结果,搜索用时 18 毫秒
81.
This paper describes the French initiative in materials research against both a national and an international background, in an attempt to disentangle the local circumstances, which prompted this governmental initiative, and to characterize the specific profile of materials research in France. In presenting a biography of the interdisciplinary program in materials research (PIRMAT), we argue that: i) the PIRMAT denotes a failure of the French science policy in materials research; ii) the leadership of the CNRS led to a specific style of research, quite different from the engineering approach of Materials Science and Engineering, and characteristic of a French style in materials research.  相似文献   
82.
83.
The present study aimed to examine whether physical and environment elements of PETTLEP imagery relate to the ability to image five types of sport imagery (i.e. skill, strategy, goal, affect and mastery). Two hundred and ninety participants (152 males, 148 females; Mage?=?20.24 years, SD?=?4.36) from various sports completed the Sport Imagery Ability Questionnaire (SIAQ), and a set of items designed specifically for the study to assess how frequently participants incorporate physical (e.g. ‘I make small movements or gestures during the imagery’) and environment (e.g. ‘I image in the real training/competition environment’) elements of PETTLEP imagery. Structural equation modelling tested a hypothesised model in which imagery priming (i.e. the best fitting physical and environment elements) significantly and positively predicted imagery ability of the different imagery types (skill, β?=?0.38; strategy, β?=?0.23; goal, β?=?0.21; affect, β?=?0.25; mastery, β?=?0.22). The model was a good fit to the data: χ2 (174)?=?263.87, p?<?.001, CFI?=?.96, TLI?=?.95, SRMR?=?.09, RMSEA?=?0.05 (90% CI?=?0.03–0.05). Findings displayed that priming imagery with physical and environment elements is associated with better skill, strategy, goal, affect and mastery imagery ability. The findings extend models of imagery use by indicating that how athletes images may influence their imagery ability.  相似文献   
84.
Kaare Aagaard 《Minerva》2017,55(3):279-297
This article outlines the evolution of a national research funding system over a timespan of more than 40 years and analyzes the development from a rather stable Humboldt-inspired floor funding model to a complex multi-tiered system where new mechanisms continually have been added on top of the system. Based on recent contributions to Historical Institutionalism it is shown how layering and displacement processes gradually have changed the funding system along a number of dimensions and thus how a series of minor adjustments over time has led to a transformation of the system as a whole. The analysis also highlights the remarkable resistance of the traditional academically oriented research council system towards restructuring. Due to this resistance the political system has, however, circumvented the research council system and implemented change through other channels of the funding system. For periods of time these strategies have marginalized the role of the councils.  相似文献   
85.
86.
Brain injury research in sport employs a variety of physical models equipped with accelerometers. These acceleration signals are commonly processed using filters. The purpose of this research was to determine the effect of applying filters with different cutoff frequencies to the acceleration signals used as input for finite element modeling of the brain. Signals were generated from reconstructions of concussion events from American football and ice hockey in the laboratory using a Hybrid III headform. The resulting acceleration signals were used as input for the University College Dublin Brain Trauma Model after being processed with filters. The results indicated that using a filter with a cutoff of 300 Hz or higher had little effect on the resulting strain measures. In some cases there was some effect of the filters on the peak linear (8–30g) and rotational measures (1000–4000 rad/s2), but little effect on the finite element strain result (approximately 2–6 %). The short duration and high magnitude accelerations, such as the puck impact, were most affected by the cutoff frequency of different filters.  相似文献   
87.
88.
89.
90.
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