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   4081篇
  免费   68篇
  国内免费   4篇
教育   3008篇
科学研究   269篇
各国文化   70篇
体育   367篇
综合类   1篇
文化理论   37篇
信息传播   401篇
  2022年   20篇
  2021年   41篇
  2020年   72篇
  2019年   122篇
  2018年   143篇
  2017年   162篇
  2016年   141篇
  2015年   96篇
  2014年   132篇
  2013年   942篇
  2012年   120篇
  2011年   104篇
  2010年   89篇
  2009年   101篇
  2008年   127篇
  2007年   114篇
  2006年   105篇
  2005年   100篇
  2004年   91篇
  2003年   76篇
  2002年   78篇
  2001年   55篇
  2000年   66篇
  1999年   65篇
  1998年   47篇
  1997年   46篇
  1996年   62篇
  1995年   50篇
  1994年   53篇
  1993年   36篇
  1992年   50篇
  1991年   36篇
  1990年   49篇
  1989年   39篇
  1988年   30篇
  1987年   24篇
  1986年   28篇
  1985年   24篇
  1984年   22篇
  1983年   15篇
  1982年   24篇
  1981年   30篇
  1980年   28篇
  1979年   18篇
  1978年   22篇
  1977年   13篇
  1976年   20篇
  1975年   14篇
  1974年   21篇
  1973年   15篇
排序方式: 共有4153条查询结果,搜索用时 531 毫秒
141.
142.
143.
To determine gender differences, positional differences, and patterns of change in the performance of the basketball line-drill test, 93 male (mean age 16.8 years, s = 1.1) and 95 female (mean age 16.5 years, s = 1.0) basketball players undertook 516 line-drill tests over a 5-year period. Log-transformed performance times were analysed using a mixed model that included quadratic within-participant fixed effects for time in the season and time in the programme. Changes and differences were standardized for interpretation of magnitudes. Mean performance times were 28.0 s (s = 1.3) for males and 30.4 s (s = 1.3) for females. The mean pattern of change in performance within a season differed substantially between the sexes and playing positions: male guards and female centres showed moderate to very large improvements mid-season of 1.1% and 3.5% respectively (90% confidence limits +/-2.1% and +/-3.0%), while female guards and male forwards showed large to very large decrements of -1.6% (+/-2.6%) and -2.4% (+/-2.0%). Over 3 years, males improved performance across all three playing positions by 1.4% (+/-1.3%) and females by 2.9% (+/-1.4%). Males improved performance by 0.2% (+/-0.5%) per year, whereas the performance of females deteriorated by 0.6% (+/-0.4%) per year. The differing patterns of performance change presumably reflect variations in training and competition loads, with short-term fluctuations in performance being managed to promote longer-term improvements.  相似文献   
144.
145.
146.
147.
148.
It is a rather safe statement to claim that the social dimensions of the scientific process are accepted in a fair share of studies in the philosophy of science. It is a somewhat safe statement to claim that the social dimensions are now seen as an essential element in the understanding of what human cognition is and how it functions. But it would be a rather unsafe statement to claim that the social is fully accepted in the philosophy of mathematics. And we are not quite sure what kind of statement it is to claim that the social dimensions in theories of mathematics education are becoming more prominent, compared to the psychological dimensions. In our contribution we will focus, after a brief presentation of the above claims, on this particular domain to understand the successes and failures of the development of theories of mathematics education that focus on the social and not primarily on the psychological.  相似文献   
149.
Previous research has established that SAT scores and high school grade point average (HSGPA) differ in their predictive power and in the size of mean differences across racial/ethnic groups. However, the SAT is scaled nationally across all test takers while HSGPA is scaled locally within a school. In this study, the researchers propose that this difference in how SAT scores and HSGPA are scaled partially explains differences in validity and subgroup differences. Using a large data set consisting of 170,390 students each of whom matriculated at one of 114 separate colleges, the researchers find that awarding SAT scores by ranking SAT within a high school generally results in substantial reduction in the size of subgroup mean differences for this predictor. However, validity for predicting first‐year GPA is also reduced by a small amount. Conversely, placing HSGPA onto a nationally normed metric through the use of multiple regression procedures results in a moderate increase in the size of subgroup mean differences, while also producing a small increase in validity. Taken together, these findings suggest that differences in predictor scaling can partially explain differences in the size of subgroup mean differences between HSGPA and SAT scores and have implications for predictive power.  相似文献   
150.
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