首页 | 官方网站   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   3978篇
  免费   49篇
  国内免费   4篇
文化教育   4031篇
  2023年   14篇
  2022年   21篇
  2021年   42篇
  2020年   69篇
  2019年   115篇
  2018年   138篇
  2017年   154篇
  2016年   133篇
  2015年   92篇
  2014年   127篇
  2013年   913篇
  2012年   117篇
  2011年   101篇
  2010年   86篇
  2009年   101篇
  2008年   122篇
  2007年   111篇
  2006年   103篇
  2005年   98篇
  2004年   90篇
  2003年   75篇
  2002年   78篇
  2001年   52篇
  2000年   62篇
  1999年   62篇
  1998年   45篇
  1997年   44篇
  1996年   61篇
  1995年   47篇
  1994年   51篇
  1993年   34篇
  1992年   50篇
  1991年   36篇
  1990年   44篇
  1989年   36篇
  1988年   29篇
  1987年   24篇
  1986年   27篇
  1985年   23篇
  1984年   21篇
  1983年   15篇
  1982年   24篇
  1981年   29篇
  1980年   27篇
  1979年   18篇
  1978年   21篇
  1976年   19篇
  1975年   14篇
  1974年   20篇
  1973年   15篇
排序方式: 共有4031条查询结果,搜索用时 15 毫秒
51.
从受评方的角度,总结了创办一个工程系和准备美国ABET工程技术专业认证的整个过程.首先对ABET和东卡罗来纳大学工程系进行必要的介绍,然后完整讲述了为准备ABET认证的组织协调,人员配置,评估计划书的制定,受评方与ABET的沟通,以及评估小组进校考察的前后过程.并且提供了课程-产出映射关系的具体实例.希望为中国工程教育同行今后准备此类认证工作提供实用的参考.  相似文献   
52.
This study examines the role of regional government quality in health-related participation in sport and physical activity among adults (18–64 years) in 28 European countries. The importance of the analysis rests in the relative autonomy that regional and local governments have over policy decisions connected with sport and physical activity. While existing studies have focussed on economic and infrastructural investment and expenditure, this research investigates the quality of regional governments across 208 regions within 28 European countries. The individual-level data stem from the 2013 Eurobarometer 80.2 (n?=?18,675) and were combined with regional-level data from Eurostat. An individual's level of participation in sport and physical activity was measured by three variables reflecting whether an individual's activity level is below, meets, or exceeds the recommendations of the World Health Organization. The results of multi-level analyses reveal that regional government quality has a significant and positive association with individual participation in sport and physical activity at a level meeting or exceeding the guidelines. The impact is much larger than that of regional gross domestic product per capita, indicating that regional disadvantage in terms of political quality is more relevant than being disadvantaged in terms of economic wealth.  相似文献   
53.
We identified the perceptual–cognitive skills and player history variables that differentiate players selected or not selected into an elite youth football (i.e. soccer) programme in Australia. A sample of elite youth male football players (n?=?127) completed an adapted participation history questionnaire and video-based assessments of perceptual–cognitive skills. Following data collection, 22 of these players were offered a full-time scholarship for enrolment at an elite player residential programme. Participants selected for the scholarship programme recorded superior performance on the combined perceptual–cognitive skills tests compared to the non-selected group. There were no significant between group differences on the player history variables. Stepwise discriminant function analysis identified four predictor variables that resulted in the best categorization of selected and non-selected players (i.e. recent match-play performance, region, number of other sports participated, combined perceptual–cognitive performance). The effectiveness of the discriminant function is reflected by 93.7% of players being correctly classified, with the four variables accounting for 57.6% of the variance. Our discriminating model for selection may provide a greater understanding of the factors that influence elite youth talent selection and identification.  相似文献   
54.
The logs of four universities using the OhioLINK journal system were evaluated for a period of fifteen months using deep log analysis methods in order to compare and contrast the information seeking behaviour of their users. Large differences were found, especially between the research and teaching universities. Methodological problems associated with making the comparisons are discussed in some detail especially in terms of defining online sessions.  相似文献   
55.
56.
57.
58.
59.
60.
ABSTRACT

The aims of the present study were to provide an in-depth comparison of inter-limb asymmetry and determine how consistently asymmetry favours the same limb during different vertical jump tests. Eighteen elite female under-17 soccer players conducted unilateral squat jumps (SJ), countermovement jumps (CMJ) and drop jumps (DJ) on a portable force platform, with jump height, peak force, concentric impulse and peak power as common metrics across tests. For the magnitude of asymmetry, concentric impulse was significantly greater during the SJ test compared to CMJ (p = 0.019) and DJ (p = 0.003). No other significant differences in magnitude were present. For the direction of asymmetry, Kappa coefficients revealed fair to substantial levels of agreement between the SJ and CMJ (Kappa = 0.35 to 0.61) tests, but only slight to fair levels of agreement between the SJ and DJ (Kappa = ?0.26 to 0.18) and CMJ and DJ (Kappa = ?0.13 to 0.26) tests. These results highlight that the mean asymmetry value may be a poor indicator of true variability of between-limb differences in healthy athletes. The direction of asymmetry may provide a useful monitoring tool for practitioners in healthy athletes, when no obvious between-limb deficit exists.  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-23

京公网安备 11010802026262号