全文获取类型
收费全文 | 331篇 |
免费 | 6篇 |
专业分类
教育 | 197篇 |
科学研究 | 35篇 |
各国文化 | 9篇 |
体育 | 42篇 |
文化理论 | 1篇 |
信息传播 | 53篇 |
出版年
2023年 | 4篇 |
2022年 | 5篇 |
2021年 | 12篇 |
2020年 | 10篇 |
2019年 | 23篇 |
2018年 | 21篇 |
2017年 | 29篇 |
2016年 | 29篇 |
2015年 | 11篇 |
2014年 | 14篇 |
2013年 | 71篇 |
2012年 | 17篇 |
2011年 | 13篇 |
2010年 | 12篇 |
2009年 | 12篇 |
2008年 | 11篇 |
2007年 | 8篇 |
2006年 | 3篇 |
2005年 | 3篇 |
2004年 | 4篇 |
2003年 | 3篇 |
2001年 | 5篇 |
2000年 | 5篇 |
1999年 | 3篇 |
1998年 | 4篇 |
1995年 | 1篇 |
1992年 | 1篇 |
1986年 | 1篇 |
1981年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有337条查询结果,搜索用时 656 毫秒
101.
Objective: To report a mathematical function that characterizes the double-pass line spread function (LSF) of the human eye. Determining analytical functions that represent the double-pass LSF is important because it allows modeling the optical performance of the eye. Methods: Optical section retinal images, generated in normal human eyes using a modified slit-lamp biomicroscope, were analyzed to derive the double-pass LSF by plotting the intensity distribution of laser light reflected/ scattered from the vitreoretinal interface. Three mathematical functions (Lorentzian, Gaussian, exponential) were fitted to the double-pass LSF and the root mean square error (RMSE) was calculated to provide a measure of the goodness of fit. Results: The Lorentzian function provided the best representation of the double-pass LSF of normal human eyes. The full width at half maximum (FWHM) of the Lorentzian fitted curve was positively correlated with age, indicating that the double-pass LSF broadens with age. Furthermore, the goodness of fit of the Lorentzian function was significantly better in younger subjects as compared with older subjects, suggesting that the fitted function to the double-pass LSF may vary according to age. Conclusion: The results demonstrate an age-related change in the double-pass LSF width and the goodness of fit of the Lorentzian function. 相似文献
102.
以往研究强调了外部环境和随机事件在主导设计形成过程中的角色,然而这只是对主导设计形成的部分解释。本研究对此进行了拓展,将主导设计的形成归因于企业可控的战略因素,认为不可控的外部因素其实是企业战略选择的结果。最后,本文以中国的TD—SCDMA技术如何发展成为主导设计为例进行了分析,并为今后的研究提出一些建议。 相似文献
103.
Addressing escape‐maintained behavior for students with developmental disabilities: A systematic review of school‐based interventions 下载免费PDF全文
Evan H. Dart Keith C. Radley Benjamin A. Mason Justin P. Allen 《Psychology in the schools》2018,55(3):295-304
Students with developmental disabilities have been found to exhibit higher rates of problem behavior in the classroom than their typically developing peers. Effectively addressing these students’ behavior concerns requires the identification of interventions that can be implemented in an educational setting. Furthermore, matching intervention strategies to the function of a student's problem behavior may increase its effectiveness. There are data to suggest that students with disabilities exhibit escape‐maintained problem behavior in the classroom twice as frequently as problem behavior maintained by other consequences such as attention or access to tangibles. Thus, the purpose of this systematic review was to identify school‐based intervention strategies that have been used to reduce the disruptive behavior of students with developmental disabilities. In total, 12 articles met search criteria, with escape extinction, curricular modification, and noncontingent escape serving as the most frequently employed intervention strategies. Limitations and future directions are discussed. 相似文献
104.
Justin S. Sanders 《Compare》2019,49(3):413-429
This cross-case analysis explores national level internationalisation of higher education (IoHE) policies in Singapore and Japan. Through comparison of the state level internationalisation strategies, this paper aims to highlight how each country’s unique policy environment impacts their approach to IoHE. The analysis suggests that despite the differing national circumstances and ultimate approaches to internationalisation, both states use it primarily as a means to stay competitive in the twenty-first century global knowledge-based economy. This suggests that while IoHE does build bridges between nations, institutions, and individuals within and between regions, within these cases it is being driven by nationally-centred rationales. While some criticize a competition orientation in IoHE, even with such rationales it may still serve to drive greater collaboration and integration among East Asian higher education systems. 相似文献
105.
Clemens Müller Thorsten Sterzing Justin Lange Thomas L. Milani 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):193-205
The purpose of this study was to evaluate the traction characteristics of four different stud configurations on Fédération Internationale de Football Association (FIFA) 2-Star, third-generation artificial soccer turf. The investigated stud configurations were hard ground design, firm ground design, soft ground design, and an experimental prototype. The concept of this study combines performance, perception, biomechanical, and mechanical testing procedures. Twenty-five soccer players took part in the different testing procedures. Variables of this study were: running times, subjective rankings/ratings, ground reaction forces, and mechanical traction properties. Statistical discrimination between the four stud configurations was shown for performance, perception, and biomechanical testing (p < 0.05). Unsuited stud configurations for playing on artificial turf are characterized by less plain distributed and pronounced studs. 相似文献
106.
Carter Justin W. Youssef-Morgan Carolyn 《Education and Information Technologies》2022,27(5):6553-6575
Education and Information Technologies - There is growing empirical support for the benefits of developing psychological capital (PsyCap), and the effectiveness of PsyCap interventions (PCIs) in... 相似文献
107.
Technological advancements and growing dependence on media outlets as sources of information compete for the attention of individuals born in a rapidly expanding digital age. As a result, educators using traditional, nondigital teaching methods struggle with keeping students engaged in the classroom. The present study assessed the extent to which a digitally enhanced learning environment can improve student involvement in learning. A traditional behavioral statistics lecture was supplemented with Nintendo Wii video gaming to increase student content knowledge comprehension and engagement with course material. A mixed Analysis of Variance (ANOVA) revealed that those in the video gaming condition improved significantly more than those receiving traditional lecture only. This research suggests that students can learn difficult conceptual material (i.e., statistics) through more novel, interactive teaching methods. 相似文献
108.
Debra Langan Nicole Schott Timothy Wykes Justin Szeto Samantha Kolpin Carla Lopez 《Technology, Pedagogy and Education》2016,25(1):101-117
Faculty frequently express concerns about students’ personal use of information and communication technologies in today’s university classrooms. As a requirement of a graduate research methodology course in a university in Ontario, Canada, the authors conducted qualitative research to gain an in-depth understanding of students’ perceptions of this issue. Their findings reveal students’ complex considerations about the acceptability of technology use. Their analysis of the broader contexts of students’ use reveals that despite a technological revolution, university teaching practices have remained largely the same, resulting in ‘cultural lag’ within the classroom. While faculty are technically ‘in charge’, students wield power through course evaluations, surveillance technologies and Internet postings. Neoliberalism and the corporatisation of the university have engendered an ‘entrepreneurial student’ customer who sees education as a means to a career. Understanding students’ perceptions and their technological, social and political contexts offers insights into the tensions within today’s classrooms. 相似文献
109.
Paul Joslin Karen S. Stiles J. Stanley Marshall O. Roger Anderson James J. Gallagher Jane Butler Kahle Peter Fensham Ruben Lazarowitz Léonie J. Rennie Barry Fraser John R. Staver Alejandro Gallard María Pilar Jiménez-Aleixandre Justin Dillon Hedy Moscovici Hsiao-Lin Tuan Christopher Emdin Kenneth Tobin Wolff-Michael Roth 《Cultural Studies of Science Education》2008,3(1):157-207
In this Forum, we construct a history of the National Association for Research in Science Education (NARST) through the analysis of documents and through the personal perspectives of individuals. The history of NARST is inseparable
from the biography of the individuals through whose lives it was produced and reproduced. The history of NARST is a living
history that both shapes and was shaped by the biographies of its members.
相似文献
Kenneth TobinEmail: |
110.
Giulia Tasquier Olivia Levrini Justin Dillon 《International Journal of Science Education》2016,38(4):539-563
The scientific community has been debating climate change for over two decades. In the light of certain arguments put forward by the aforesaid community, the EU has recommended a set of innovative reforms to science teaching such as incorporating environmental issues into the scientific curriculum, thereby helping to make schools a place of civic education. However, despite these European recommendations, relatively little emphasis is still given to climate change within science curricula. Climate change, although potentially engaging for students, is a complex topic that poses conceptual difficulties and emotional barriers, as well as epistemological challenges. Whilst the conceptual and emotional barriers have already been the object of several studies, students’ reactions to the epistemological issues raised by climate changes have so far been rarely explored in science education research and thus are the main focus of this paper. This paper describes a study concerning the implementation of teaching materials designed to focus on the epistemological role of ‘models and the game of modelling’ in science and particularly when dealing with climate change. The materials were implemented in a course of 15 hours (five 3-hour lessons) for a class of Italian secondary-school students (grade 11; 16–17 years old). The purpose of the study is to investigate students’ reactions to the epistemological dimension of the materials, and to explore if and how the material enabled them to develop their epistemological knowledge on models. 相似文献