全文获取类型
收费全文 | 1243篇 |
免费 | 17篇 |
专业分类
教育 | 978篇 |
科学研究 | 79篇 |
各国文化 | 13篇 |
体育 | 59篇 |
文化理论 | 14篇 |
信息传播 | 117篇 |
出版年
2022年 | 7篇 |
2021年 | 16篇 |
2020年 | 11篇 |
2019年 | 21篇 |
2018年 | 33篇 |
2017年 | 28篇 |
2016年 | 32篇 |
2015年 | 14篇 |
2014年 | 22篇 |
2013年 | 322篇 |
2012年 | 19篇 |
2011年 | 23篇 |
2010年 | 22篇 |
2009年 | 24篇 |
2008年 | 28篇 |
2007年 | 30篇 |
2006年 | 23篇 |
2005年 | 23篇 |
2004年 | 30篇 |
2003年 | 24篇 |
2002年 | 41篇 |
2001年 | 27篇 |
2000年 | 21篇 |
1999年 | 23篇 |
1998年 | 12篇 |
1997年 | 21篇 |
1996年 | 13篇 |
1995年 | 16篇 |
1994年 | 17篇 |
1993年 | 13篇 |
1992年 | 13篇 |
1991年 | 11篇 |
1990年 | 18篇 |
1989年 | 19篇 |
1988年 | 12篇 |
1987年 | 15篇 |
1986年 | 7篇 |
1985年 | 9篇 |
1984年 | 13篇 |
1983年 | 8篇 |
1982年 | 16篇 |
1981年 | 9篇 |
1980年 | 16篇 |
1979年 | 13篇 |
1978年 | 10篇 |
1977年 | 10篇 |
1976年 | 14篇 |
1975年 | 8篇 |
1968年 | 7篇 |
1967年 | 7篇 |
排序方式: 共有1260条查询结果,搜索用时 343 毫秒
41.
42.
43.
44.
A method is described for determining multiple loop feedback topologies which yield minimum sensitivities for symmetrical, all-pole bandpass filters. The procedure begins with a follow-the-leader feedback (FLF) topology and additional feedback loops are constructed until minimum sensitivity is achieved. Filters comprised of identical second-order sections and non-identical sections, respectively, are considered. 相似文献
45.
46.
47.
David NICHOLAS Anthony WATKINSON Hamid R. JAMALI Eti HERMAN Carol TENOPIR Rachel VOLENTINE Suzie ALLARD Kenneth LEVINE 《Learned Publishing》2015,28(1):15-21
The article presents one of the main findings of an international study of 4,000 academic researchers that examined how trustworthiness is determined in the digital environment when it comes to scholarly reading, citing, and publishing. The study shows that peer review is still the most trustworthy characteristic of all. There is, though, a common perception that open access journals are not peer reviewed or do not have proper peer‐review systems. Researchers appear to have moved inexorably from a print‐based system to a digital system, but it has not significantly changed the way they decide what to trust. They do not trust social media. Only a minority – although significantly mostly young and early career researchers – thought that social media are anything other than more appropriate to personal interactions and peripheral to their professional/academic lives. There are other significant differences, according to the age of the researcher. Thus, in regard to choosing an outlet for publication of their work, young researchers are much less concerned with the fact that it is peer reviewed. 相似文献
48.
Kenneth Tobin Leonie Rennie Grady Venville Hye-Eun Chu Peter Fensham James Gallagher Reinders Duit Wolfgang Graeber Ed van den Berg Brian Hand Stephen Ritchie Justin Dillon 《Cultural Studies of Science Education》2011,6(3):783-793
For almost a half century David F. Treagust has been an exemplary science educator who has contributed through his dedication and commitments to students, curriculum development and collaboration with teachers, and cutting edge research in science education that has impacted the field globally, nationally and locally. A hallmark of his outstanding career is his collaborative style that inspires others to produce their best work. 相似文献
49.
Meng Ee Wong Kenneth K. Poon Sarinajit Kaur Zi Jia Ng 《Asia Pacific Journal of Education》2015,35(1):85-97
Relatively little work has focused on inclusive education in Singapore. This study examines the experiences and perceptions of parents whose children with disabilities are attending mainstream secondary schools in Singapore. Data was drawn from interviews with 13 parents of children with mild disabilities. Our findings reveal that parental perspective on inclusive education in Singapore is not only about classroom support but also reflects a deeper concern about whether their children with disabilities will emerge from school as contributing individuals in society. While parents strive to effectively include their children with disabilities in mainstream classrooms, there were dichotomies in their (1) understanding of disabilities, (2) expectations of school support, and (3) expectations for their child with disabilities. Given that academic and social prowess is a critical prerequisite to have a shot at entering the meritocratic Singapore society, the tension parents experience is to gauge a reasonable amount of pressure to exert on their children, the school and themselves as they assert their children's educational entitlements within an imperfect but evolving state of inclusion. 相似文献
50.
Ravi C. Paul William Swart Aixiu Monica Zhang Kenneth R. MacLeod 《Distance Education》2015,36(3):364-382
Transactional distance has been defined as barriers to students’ engagement with learning in the online environment. This research updates Zhang’s (2003) scale of transactional distance, which quantified the extent of the barriers, in light of the massive changes in today’s web-based learning environment. The resulting revised scale of transactional distance (RSTD) is a parsimonious version with 12 elements (compared to 31 original) that measure the transactional distance between student and teacher, student and student, and student and content. The RSTD has excellent factorial validity and reliability, yields better fit statistics, and is easier and less time-consuming to apply. The transactional distance values are unique predictors of student satisfaction, which is correlated to learning and persistence (a major concern with massive open online courses). This information can form the basis for a systematic approach to improving the design of today’s contemporary open, flexible, distance education courses and thus serve as a valuable tool for researchers and educators alike. 相似文献