全文获取类型
收费全文 | 13962篇 |
免费 | 229篇 |
国内免费 | 11篇 |
专业分类
教育 | 9668篇 |
科学研究 | 1678篇 |
各国文化 | 125篇 |
体育 | 1027篇 |
综合类 | 17篇 |
文化理论 | 164篇 |
信息传播 | 1523篇 |
出版年
2022年 | 104篇 |
2021年 | 152篇 |
2020年 | 227篇 |
2019年 | 315篇 |
2018年 | 438篇 |
2017年 | 465篇 |
2016年 | 414篇 |
2015年 | 271篇 |
2014年 | 400篇 |
2013年 | 2309篇 |
2012年 | 350篇 |
2011年 | 332篇 |
2010年 | 320篇 |
2009年 | 283篇 |
2008年 | 292篇 |
2007年 | 303篇 |
2006年 | 290篇 |
2005年 | 241篇 |
2004年 | 266篇 |
2003年 | 234篇 |
2002年 | 247篇 |
2001年 | 316篇 |
2000年 | 340篇 |
1999年 | 258篇 |
1998年 | 140篇 |
1997年 | 182篇 |
1996年 | 177篇 |
1995年 | 123篇 |
1994年 | 136篇 |
1993年 | 117篇 |
1992年 | 196篇 |
1991年 | 182篇 |
1990年 | 215篇 |
1989年 | 210篇 |
1988年 | 180篇 |
1987年 | 193篇 |
1986年 | 172篇 |
1985年 | 207篇 |
1984年 | 150篇 |
1983年 | 131篇 |
1982年 | 124篇 |
1981年 | 109篇 |
1980年 | 112篇 |
1979年 | 174篇 |
1978年 | 131篇 |
1977年 | 113篇 |
1976年 | 89篇 |
1975年 | 92篇 |
1974年 | 94篇 |
1973年 | 91篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Mallory Bolenbaugh Megan Foley-Nicpon Rachel Young Melissa Tully Nikki Grunewald Marizen Ramirez 《Psychology in the schools》2020,57(11):1657-1679
Cyberbullying is a major health concern for today's youth and a pervasive stressor for adolescents and their families. This study offers qualitative insights into how parents perceive their children's technology use and engagement in cyberbullying based on gender. Eight focus groups were conducted with 48 parents of adolescents ages 10–17. Findings indicated parents perceived their children overuse technology and lack awareness of what cyberbullying is. Specific to gender, parents suggested their daughters use technology for social connection, and parents were more concerned about their daughter's technology use than their son's, which they believed was related to specific interests. In response to cyberbullying scenarios, parents encouraged females but not males to socialize with peers. This is the first qualitative study to obtain an in-depth understanding of the ways in which parents perceive and socialize their children in regard to technology use and cyberbullying scenarios. These results may help school systems, school psychologists, researchers, and parents gain awareness of the gender-stereotypical socialization process that unfolds in parental monitoring of technology use and cyberbullying situations. We conclude by offering suggestions for how school systems and personnel might intervene. 相似文献
82.
83.
84.
K. S. Yakovlev D. A. Makarov E. S. Baskin 《Scientific and Technical Information Processing》2015,42(5):347-358
In the article we solve path planning task for an agent being multirotor unmanned aerial vehicle (multicopter). We propose an approach of estimating path geometry constraints based on UAV flight dynamics model and control constraints. Than we introduce a new path finding method which takes into consideration those geometry constraints and study this method both theoretically and empirically. 相似文献
85.
86.
Leonardo S. Fortes Dalton De Lima-Junior Lenamar Fiorese José R. A. Nascimento-Júnior Arnaldo L. Mortatti Maria E. C. Ferreira 《Journal of sports sciences》2020,38(5):552-558
ABSTRACTThe objective of this study was to analyse the effect of the use of social networks in smartphones or playing video games on the passing decision-making performance in professional soccer athletes. Participants were 25 male professional soccer athletes (mean ± SD: age 23.4 ± 2.8 years). The participants performed three randomised conditions divided into three groups: control (CON), smartphone (SMA), and video game (VID). Before and after each experimental condition, the Stroop Task assessed the level of induced mental fatigue. Then, the athletes performed a simulated soccer match. A CANON® camera recorded the matches for further analysis on passing decision-making performance. A group effect was identified (p < .01) with impairment on passing decision-making performance for the SMA (p = .01, ES = 0.5) and VID (p = .01, ES = 0.5) conditions. We concluded that the use of social networks on smartphones and/or playing video games right before official soccer matches might impair the passing decision-making performance in professional soccer athletes. 相似文献
87.
88.
ABSTRACTRecently, there has been much controversy over the International Association of Athletics Federation (IAAF) regulations regarding eligibility to compete and natural testosterone levels in female athletes. Much interest lies in the analysis of Caster Semenya's extraordinary performance. The objective of this work were, a) Complete an analysis of Caster Semenya's results during the 800m finals and b) search for existing similar performances by other female athletes. We analysed the results of the finals of all IAAF World Championships and Olympic Games from 1984–2016, including the 800m results of the Diamond Leagues 2016–2018. Exponential curves were fit to the data to characterise and predict performance for each event. Caster Semenya's finishing times before her ineligibility to compete and after the suspension of the IAAF hyperandrogenism regulation were found to be 1.24% and 1.49%, respectively, faster than the characteristic performance of the elite-standard in the women’s 800m final. Other female athletes, with finishing times faster than the ones predicted by the characteristic curves were also discovered. The percentage difference in performance between Caster Semenya and the other participants did not reach 3% in the 800m event. No conclusions can be drawn regarding extraordinary results ever performed during the 100m, 200m or 400m finals. 相似文献
89.
S. Andrew Garbacz Tom Cariveau Emily Barrett 《Journal of educational and psychological consultation》2016,26(2):200-211
The present article explores the utility and feasibility of treatment validation consultation (TVC). Although evidence exists for behavioral consultation, few findings have been reported for TVC. TVC is based on core components of behavioral consultation, but has several unique characteristics. In this article, TVC is situated within the behavioral consultation literature; one case study is used to demonstrate TVC’s utility and feasibility; and considerations for future TVC research are explored. 相似文献
90.
Methodological Choices in the Content Analysis of Textbooks for Measuring Alignment With Standards
下载免费PDF全文
![点击此处可从《Educational Measurement》网站下载免费的PDF全文](/ch/ext_images/free.gif)
With the recent adoption of the Common Core standards in many states, there is a need for quality information about textbook alignment to standards. While there are many existing content analysis procedures, these generally have little, if any, validity or reliability evidence. One exception is the Surveys of Enacted Curriculum (SEC), which has been widely used to analyze the alignment among standards, assessments, and teachers’ instruction. However, the SEC can be time‐consuming and expensive when used for this purpose. This study extends the SEC to the analysis of entire mathematics textbooks and investigates whether the results of SEC alignment analyses are affected if the content analysis procedure is simplified. The results indicate that analyzing only every fifth item produces nearly identical alignment results with no effect on the reliability of content analyses. 相似文献