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   1193篇
  免费   21篇
  国内免费   3篇
教育   823篇
科学研究   77篇
各国文化   19篇
体育   131篇
文化理论   23篇
信息传播   144篇
  2023年   4篇
  2022年   15篇
  2021年   21篇
  2020年   25篇
  2019年   40篇
  2018年   55篇
  2017年   57篇
  2016年   56篇
  2015年   36篇
  2014年   45篇
  2013年   233篇
  2012年   38篇
  2011年   42篇
  2010年   40篇
  2009年   35篇
  2008年   38篇
  2007年   49篇
  2006年   32篇
  2005年   34篇
  2004年   31篇
  2003年   32篇
  2002年   25篇
  2001年   23篇
  2000年   11篇
  1999年   11篇
  1998年   13篇
  1997年   6篇
  1996年   11篇
  1995年   6篇
  1994年   12篇
  1993年   4篇
  1991年   7篇
  1989年   8篇
  1988年   5篇
  1987年   11篇
  1986年   5篇
  1985年   8篇
  1984年   5篇
  1983年   7篇
  1982年   5篇
  1981年   5篇
  1977年   4篇
  1976年   6篇
  1975年   5篇
  1973年   6篇
  1972年   4篇
  1971年   4篇
  1970年   4篇
  1968年   3篇
  1966年   3篇
排序方式: 共有1217条查询结果,搜索用时 15 毫秒
31.
32.
33.
34.
Understanding the role of shaft stiffness in the golf swing   总被引:3,自引:3,他引:0  
Theoretically, shaft stiffness can alter shot distance by increasing clubhead speed or altering clubhead orientation at impact. A 3D forward dynamics model of a golfer and flexible club simulated the downswing. A genetic algorithm optimized the coordination of the model’s muscles (four torque generators) to maximize clubhead speed. The maximum torque output and maximum rate of torque development from the torque generators were varied to simulate the swing of golfers that generate different clubhead speeds. Four shafts of varying stiffness (flexible, regular, stiff, and completely rigid) were entered into these simulations to examine the role that shaft flexibility had on clubhead speed and orientation at impact. Shaft stiffness was found to have a meaningful effect only on clubhead orientation (dynamic loft and dynamic close) at impact. There was no evidence to support the premise that matching the stiffness properties of the shaft with the golfer would improve clubhead speed.  相似文献   
35.
36.
We investigated the oxygen-conserving potential of the human diving response by comparing trained breath-hold divers (BHDs) to non-divers (NDs) during simulated dynamic breath-holding (BH). Changes in haemodynamics [heart rate (HR), stroke volume (SV), cardiac output (CO)] and peripheral muscle oxygenation [oxyhaemoglobin ([HbO2]), deoxyhaemoglobin ([HHb]), total haemoglobin ([tHb]), tissue saturation index (TSI)] and peripheral oxygen saturation (SpO2) were continuously recorded during simulated dynamic BH. BHDs showed a breaking point in HR kinetics at mid-BH immediately preceding a more pronounced drop in HR (?0.86 bpm.%?1) while HR kinetics in NDs steadily decreased throughout BH (?0.47 bpm.%?1). By contrast, SV remained unchanged during BH in both groups (all > 0.05). Near-infrared spectroscopy (NIRS) results (mean ± SD) expressed as percentage changes from the initial values showed a lower [HHb] increase for BHDs than for NDs at the cessation of BH (+24.0 ± 10.1 vs. +39.2 ± 9.6%, respectively; < 0.05). As a result, BHDs showed a [tHb] drop that NDs did not at the end of BH (?7.3 ± 3.2 vs. ?3.0 ± 4.7%, respectively; < 0.05). The most striking finding of the present study was that BHDs presented an increase in oxygen-conserving efficiency due to substantial shifts in both cardiac and peripheral haemodynamics during simulated BH. In addition, the kinetic-based approach we used provides further credence to the concept of an “oxygen-conserving breaking point” in the human diving response.  相似文献   
37.
The paper attempts to work out the link between the structuring of the public domain and hegemonic masculinities in contemporary Kerala, South India. Using the debates around an incident of sexual harassment that happened in 1999, it argues for a conjunctural understanding of the contemporary where various events and moments in history are replayed through narrativization and popular memory. The paper goes on to analyse the debates around the incident that produce a ‘narrative public domain’, to foreground the various notions of masculinity that construct and structure it in relation to notions of female sexuality and changing structures of family. These notions of masculinity could be, the paper argues, a starting point for a historical inquiry into Kerala's modernity – an inquiry that would throw light on the past and the ways in which the contemporary is produced through its historical legacies.  相似文献   
38.
39.
40.
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