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   347篇
  免费   3篇
  国内免费   8篇
教育   199篇
科学研究   69篇
体育   46篇
综合类   13篇
信息传播   31篇
  2024年   2篇
  2023年   8篇
  2022年   2篇
  2021年   1篇
  2020年   5篇
  2019年   2篇
  2018年   3篇
  2017年   1篇
  2016年   1篇
  2015年   6篇
  2014年   9篇
  2013年   7篇
  2012年   43篇
  2011年   34篇
  2010年   17篇
  2009年   8篇
  2008年   25篇
  2007年   28篇
  2006年   21篇
  2005年   20篇
  2004年   10篇
  2003年   21篇
  2002年   15篇
  2001年   12篇
  2000年   12篇
  1999年   8篇
  1998年   1篇
  1996年   3篇
  1995年   1篇
  1994年   2篇
  1992年   3篇
  1991年   8篇
  1990年   10篇
  1989年   7篇
  1983年   1篇
  1980年   1篇
排序方式: 共有358条查询结果,搜索用时 15 毫秒
1.
2.
This study extended validity evidence for multidimensional measures of coaching competency derived from the Coaching Competency Scale (CCS; Myers, Feltz, Maier, Wolfe, & Reckase, 2006) by examining use of the original rating scale structure and testing how measures related to satisfaction with the head coach within teams and between teams. Motivation, game strategy, technique, and character building comprised the dimensions of coaching competency. Data were collected from athletes (N = 585) nested within intercollegiate men's (g = 8) and women's (g = 13) soccer and women's ice hockey (g = 11) teams (G = 32). Validity concerns were observed for the original rating scale structure and the predicted positive relationship between motivation competency and satisfaction with the coach between teams. Validity evidence was offered for a condensed post hoc rating scale and the predicted relationship between motivation competency and satisfaction with the coach within teams.  相似文献   
3.
科技论文照片图中的标度问题   总被引:1,自引:0,他引:1  
不少科技论文常采用照片图来表述有关内容.照片图包括金相显微照片、扫描电镜照片(SEM)、透射电镜照片(TEM)等.有关国家标准要求,照片图上应该有表示目的物的标度或提供放大倍数[1],标度作为照片图中的细节部分不应被忽视.  相似文献   
4.
Given the important role of parent-youth communication in adolescent well-being and quality of life, we sought to examine the relationship between specific communication variables and youth perceived quality of life in general and as a deaf or hard-of-hearing (DHH) individual. A convenience sample of 230 youth (mean age = 14.1, standard deviation = 2.2; 24% used sign only, 40% speech only, and 36% sign + speech) was surveyed on communication-related issues, generic and DHH-specific quality of life, and depression symptoms. Higher youth perception of their ability to understand parents' communication was significantly correlated with perceived quality of life as well as lower reported depressive symptoms and lower perceived stigma. Youth who use speech as their single mode of communication were more likely to report greater stigma associated with being DHH than youth who used both speech and sign. These findings demonstrate the importance of youths' perceptions of communication with their parents on generic and DHH-specific youth quality of life.  相似文献   
5.
等离子体中产生的电场能够使电子加速以获得高能。这个方法可望使场强比能量最大的传统加速器的场强高出10,000倍。  相似文献   
6.
7.
"比特"与"字节"单位符号规范化标注建议   总被引:1,自引:1,他引:0  
黄炜  徐用吉  林清华 《编辑学报》2007,19(2):104-105
国家标准未对单位"比特"和"字节"的符号做出明确规定,因此,在论文中对它们的标注很不统一.针对这一问题,简要介绍比特、字节的物理概念,分析"比特"和"字节"单位符号的使用现状,并提出规范化标注的建议.  相似文献   
8.
We have developed experiments and materials to model human genetics using rapid cycling Brassica rapa, also known as Fast Plants. Because of their self-incompatibility for pollination and the genetic diversity within strains, B. rapa can serve as a relevant model for human genetics in teaching laboratory experiments. The experiment presented here is a paternity exclusion project in which a child is born with a known mother but two possible alleged fathers. Students use DNA markers (microsatellites) to perform paternity exclusion on these subjects. Realistic DNA marker analysis can be challenging to implement within the limitations of an instructional lab, but we have optimized the experimental methods to work in a teaching lab environment and to maximize the “hands-on” experience for the students. The genetic individuality of each B. rapa plant, revealed by analysis of polymorphic microsatellite markers, means that each time students perform this project, they obtain unique results that foster independent thinking in the process of data interpretation.  相似文献   
9.
Two studies were conducted to investigate how 14- to 16-month-old infants select actions to imitate from the stream of events. In each study, an experimenter demonstrated two actions leading to an interesting effect. Aspects of the first action were manipulated and whether infants performed this action when given the objects was observed. In both studies, infants were more likely to imitate the first action when it was physically necessary to generate the effect, and in Study 2 they were also more likely to imitate the action when it was socially cued. It seems that infants' own knowledge of space and causality as well as their sensitivity to others' social signals both contribute to their tendency to imitate actions.  相似文献   
10.
黄炜  王波 《视听界》2007,(2):61-62
新闻采访与报道往往离不开数字。数字是事物量变和质变的尺码,是记者在采访报道中无可逃避而又苦苦寻觅的绝好素材,其重要性不言而喻。但是,如果数字用得过多过滥,或者用得不恰当,新闻报道就会枯燥乏味,难以给受众留下深刻的印象,它所承载的意义也就难以显现,甚至还会成为阅读收听、收看的障碍,这已经成为当今新闻报道的一大问题。笔者总结如下几种方法,供参考。  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