全文获取类型
收费全文 | 451篇 |
免费 | 17篇 |
专业分类
教育 | 382篇 |
科学研究 | 18篇 |
各国文化 | 4篇 |
体育 | 35篇 |
文化理论 | 2篇 |
信息传播 | 27篇 |
出版年
2021年 | 7篇 |
2020年 | 7篇 |
2019年 | 12篇 |
2018年 | 22篇 |
2017年 | 25篇 |
2016年 | 29篇 |
2015年 | 15篇 |
2014年 | 12篇 |
2013年 | 92篇 |
2012年 | 18篇 |
2011年 | 10篇 |
2010年 | 16篇 |
2009年 | 13篇 |
2008年 | 7篇 |
2007年 | 12篇 |
2006年 | 10篇 |
2005年 | 5篇 |
2004年 | 13篇 |
2003年 | 5篇 |
2002年 | 4篇 |
2001年 | 4篇 |
2000年 | 6篇 |
1999年 | 3篇 |
1998年 | 4篇 |
1997年 | 6篇 |
1996年 | 4篇 |
1995年 | 9篇 |
1994年 | 6篇 |
1993年 | 8篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 7篇 |
1989年 | 7篇 |
1988年 | 10篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1984年 | 2篇 |
1983年 | 4篇 |
1982年 | 2篇 |
1981年 | 4篇 |
1980年 | 4篇 |
1979年 | 4篇 |
1978年 | 5篇 |
1977年 | 2篇 |
1976年 | 2篇 |
1974年 | 2篇 |
1972年 | 2篇 |
1967年 | 2篇 |
1956年 | 2篇 |
1892年 | 1篇 |
排序方式: 共有468条查询结果,搜索用时 31 毫秒
91.
92.
93.
94.
We've failed: Pirate black open access is trumping green and gold and we must change our approach 下载免费PDF全文
Toby Green 《Learned Publishing》2017,30(4):325-329
Key points
- Sci‐Hub has made nearly all articles freely available using a black open access model, leaving green and gold models in its dust.
- Why, after 20 years of effort, have green and gold open access not achieved more? Do we need ‘tae think again’?
- If human nature is to postpone change for as long as possible, are green and gold open access fundamentally flawed?
- Open and closed publishing models depend on bundle pricing paid by one stakeholder, the others getting a free ride. Is unbundling a fairer model?
- If publishers changed course and unbundled their product, would this open a legal, fairer route to 100% open access and see off the pirates?
95.
96.
Stuart Caulfield Kirsty A. McDonald Brian Dawson Sarah M. Stearne Ben A. Green Jonas Rubenson 《Journal of sports sciences》2016,34(15):1485-1490
This study examined the haemolytic effects of an interval-based running task in fore-foot and rear-foot striking runners. Nineteen male distance runners (10 fore-foot, 9 rear-foot) completed 8 × 3 min repeats at 90% vVO2peak on a motorised treadmill. Pre- and post-exercise venous blood samples were analysed for serum haptoglobin to quantify the haemolytic response to running. Vertical ground reaction forces were also captured via a force plate beneath the treadmill belt. Haptoglobin levels were significantly decreased following exercise (P = 0.001) in both groups (but not between groups), suggesting that the running task created a haemolytic stress. The ground reaction force data showed strong effect sizes for a greater peak force (d = 1.20) and impulse (d = 1.37) in fore-foot runners, and a greater rate of force development (d = 2.74) in rear-foot runners. The lack of difference in haptoglobin response between groups may be explained by the trend for fore-foot runners to experience greater peak force and impulse during the stance phase of their running gait, potentially negating any impact of the greater rate of force development occurring from the rear-foot runners’ heel strike. Neither type of runner (fore-foot or rear-foot) appears more susceptible to technique-related foot-strike haemolysis. 相似文献
97.
Martin Cooke B.Sc. Ph.D. Guy J. Brown B.Sc. Ph.D. Malcolm Crawford B.Sc. Phil Green B.Sc. Ph.D. 《Endeavour》1993,17(4)
The problem of distinguishing particular sounds, such as conversation, against a background of irrelevant noise is a matter of common experience. Psychologists have studied it for some 40 years, but is is only comparatively recently that computer modelling of the phenomenon has been attempted. This article reviews progress made, possible practical applications, and prospects for the future. 相似文献
98.
Marissa Rollnick Stella Zwane Mina Staskun Sandra Lotz Gail Green 《International Journal of Science Education》2013,35(10):1053-1071
This study uses an action research approach to investigate how different modes of pre-laboratory preparation contribute towards a fruitful laboratory experience for first year students on an access programme. We considered the experience to be fruitful if the students successfully acquired procedural understanding, communicative competence and were able to apply the conceptual understanding to make the purpose of the labs meaningful. A group of students was observed by participant observers during 1996. Data was gathered during laboratory sessions and from written pre-laboratory work. These data were analysed and changes were instituted in the running and conceptualization of the laboratory in the subsequent year. A group of students was again observed and data collected. Two important factors emerged from the analysis of the data. One finding was the importance of adequate student preparation for the laboratories, regardless of the mode of preparation employed. Another was that the ability to prepare depended on the conceptual and procedural understanding of the laboratory as a whole. Preparedness is also important if conceptual benefit is to be obtained from the practical experience. 相似文献
99.
100.
Andy Green 《European Journal of Education》2011,46(2):228-243
This article compares the evidence from the 2009 PISA survey on the distribution of skills amongst 15-year-olds in different regions and country groups and explores how education systems in these regions contribute to different levels of inequality. In the second part, it presents evidence from surveys on adult skills and attitudes on how skills inequality affects social attitudes and social cohesion. 相似文献