全文获取类型
收费全文 | 1127篇 |
免费 | 31篇 |
国内免费 | 4篇 |
专业分类
教育 | 851篇 |
科学研究 | 83篇 |
各国文化 | 22篇 |
体育 | 75篇 |
综合类 | 1篇 |
文化理论 | 16篇 |
信息传播 | 114篇 |
出版年
2022年 | 6篇 |
2021年 | 17篇 |
2020年 | 11篇 |
2019年 | 21篇 |
2018年 | 35篇 |
2017年 | 27篇 |
2016年 | 44篇 |
2015年 | 21篇 |
2014年 | 45篇 |
2013年 | 300篇 |
2012年 | 15篇 |
2011年 | 26篇 |
2010年 | 18篇 |
2009年 | 25篇 |
2008年 | 33篇 |
2007年 | 29篇 |
2006年 | 28篇 |
2005年 | 23篇 |
2004年 | 17篇 |
2003年 | 19篇 |
2002年 | 21篇 |
2001年 | 11篇 |
2000年 | 12篇 |
1999年 | 14篇 |
1998年 | 10篇 |
1997年 | 18篇 |
1996年 | 11篇 |
1995年 | 14篇 |
1994年 | 13篇 |
1993年 | 14篇 |
1992年 | 9篇 |
1991年 | 13篇 |
1990年 | 9篇 |
1989年 | 12篇 |
1988年 | 9篇 |
1987年 | 7篇 |
1985年 | 14篇 |
1984年 | 8篇 |
1983年 | 16篇 |
1982年 | 15篇 |
1981年 | 8篇 |
1979年 | 11篇 |
1978年 | 9篇 |
1977年 | 8篇 |
1975年 | 7篇 |
1974年 | 12篇 |
1973年 | 9篇 |
1972年 | 6篇 |
1970年 | 7篇 |
1965年 | 6篇 |
排序方式: 共有1162条查询结果,搜索用时 31 毫秒
21.
Frank A. Farris 《PRIMUS》2017,27(8-9):827-844
AbstractThe domain-coloring algorithm allows us to visualize complex-valued functions on the plane in a single image—an alternative to before-and-after mapping diagrams. It helps us see when a function is analytic and aids in understanding contour integrals. The culmination of this article is a visual discovery and subsequent proof of the Argument Principle, which relates the count of poles and zeros of a meromorphic function inside a contour to the accumulated change in argument of the function around the contour. Throughout, I offer connections to standard learning goals of courses in complex variables. 相似文献
22.
23.
Supplemental instruction classes have been shown in many studies to enhance performance in the supported courses and even to improve graduation rates. Generally, there has been little evidence of a differential impact on students from different ethnic/racial backgrounds. At San Francisco State University, however, supplemental instruction in the Introductory Biology I class is associated with even more dramatic gains among students from underrepresented minority populations than the gains found among their peers. These gains do not seem to be the product of better students availing themselves of supplemental instruction or other outside factors. The Introductory Biology I class consists of a team-taught lecture component, taught in a large lecture classroom, and a laboratory component where students participate in smaller lab sections. Students are expected to master an understanding of basic concepts, content, and vocabulary in biology as well as gain laboratory investigation skills and experience applying scientific methodology. In this context, supplemental instruction classes are cooperative learning environments where students participate in learning activities that complement the course material, focusing on student misconceptions and difficulties, construction of a scaffolded knowledge base, applications involving problem solving, and articulation of constructs with peers. 相似文献
24.
Veenstra R Lindenberg S Zijlstra BJ De Winter AF Verhulst FC Ormel J 《Child development》2007,78(6):1843-1854
For this study, information on Who Bullies Who was collected from 54 school classes with 918 children (M age = 11) and 13,606 dyadic relations. Bullying and victimization were viewed separately from the point of view of the bully and the victim. The two perspectives were highly complementary. The probability of a bully-victim relationship was higher if the bully was more dominant than the victim, and if the victim was more vulnerable than the bully and more rejected by the class. In a bully-victim dyad, boys were more often the bullies. There was no finding of sex effect for victimization. Liking reduced and disliking increased the probability of a bully-victim relationship. 相似文献
25.
26.
This study demonstrates how academicians and practitioners can work together on an important topic that matters to organizational performance: the pivotal role played by salespeople during new product launches. In particular, the authors present three potential interventions that training and sales managers may use to sell a new product to salespeople. The results legitimatize the critical contribution of sales training to new product sales performance and highlight the value of the partnership between training professionals and sales managers. 相似文献
27.
28.
29.
Frank Ventura 《International Journal of Science Education》2013,35(5):509-519
Abstract This paper traces the main stages in the path towards the recognition in 1988 of the place of science and environmental education in the Maltese curriculum for the primary level. A brief review is given of the development of the science curriculum while a more detailed account is given of the development of a project on environmental education. The project involved the adoption of a model of the child's view of the environment, the drawing up of an ensemble of attainment targets, and the exploration of ways of infusing environmental education activities into the curriculum. A draft teacher's manual was circulated and evaluated at a national seminar. Major points arising during the seminar are discussed and plans for the dissemination of the work are outlined. Comparing the roles that teachers are asked to play in these developments, it is found that environmental education offers them more opportunity for professional growth. 相似文献
30.
Frank Rijmen 《Journal of Educational Measurement》2010,47(3):361-372
Testlet effects can be taken into account by incorporating specific dimensions in addition to the general dimension into the item response theory model. Three such multidimensional models are described: the bi-factor model, the testlet model, and a second-order model. It is shown how the second-order model is formally equivalent to the testlet model. In turn, both models are constrained bi-factor models. Therefore, the efficient full maximum likelihood estimation method that has been established for the bi-factor model can be modified to estimate the parameters of the two other models. An application on a testlet-based international English assessment indicated that the bi-factor model was the preferred model for this particular data set. 相似文献