全文获取类型
收费全文 | 3129篇 |
免费 | 43篇 |
国内免费 | 3篇 |
专业分类
教育 | 2297篇 |
科学研究 | 166篇 |
各国文化 | 26篇 |
体育 | 435篇 |
文化理论 | 63篇 |
信息传播 | 188篇 |
出版年
2023年 | 30篇 |
2022年 | 48篇 |
2021年 | 71篇 |
2020年 | 117篇 |
2019年 | 183篇 |
2018年 | 234篇 |
2017年 | 239篇 |
2016年 | 171篇 |
2015年 | 113篇 |
2014年 | 112篇 |
2013年 | 665篇 |
2012年 | 123篇 |
2011年 | 80篇 |
2010年 | 78篇 |
2009年 | 82篇 |
2008年 | 66篇 |
2007年 | 59篇 |
2006年 | 60篇 |
2005年 | 48篇 |
2004年 | 37篇 |
2003年 | 45篇 |
2002年 | 32篇 |
2001年 | 28篇 |
2000年 | 22篇 |
1999年 | 27篇 |
1998年 | 23篇 |
1997年 | 17篇 |
1996年 | 27篇 |
1995年 | 25篇 |
1994年 | 29篇 |
1993年 | 21篇 |
1992年 | 13篇 |
1991年 | 21篇 |
1990年 | 20篇 |
1989年 | 23篇 |
1988年 | 23篇 |
1987年 | 13篇 |
1986年 | 7篇 |
1984年 | 10篇 |
1983年 | 6篇 |
1982年 | 11篇 |
1981年 | 6篇 |
1980年 | 7篇 |
1979年 | 9篇 |
1978年 | 8篇 |
1977年 | 5篇 |
1976年 | 8篇 |
1975年 | 8篇 |
1974年 | 6篇 |
1971年 | 6篇 |
排序方式: 共有3175条查询结果,搜索用时 8 毫秒
201.
Modern patent systems are slow, inefficient, expensive, and may result in outcomes that actively harm technological progress. This paper proposes a substantive re-think of these systems and lays a foundation upon which practical solutions can be built. Many solutions proposed in the past, such as prior-art bounties, outsourced examination, and dynamic fee setting, have gone unheeded due to the cost of administering them and the rigidity of the patent system. We explore how distributed ledger technologies (DLTs) enable these major changes by altering the way stakeholders are able to interact with the patent records system. We find that transitioning to a DLT-based patent records system can enable many previously suggested improvements to current patent systems in a flexible, scalable, and transparent manner. The case for such a transition is strengthened when jointly considering the complex but common roots of problems facing modern patent systems, rather than a balkanised set of technical solutions to address each issue independently. Noting that a DLT-based system is not a panacea, we also provide comment on the political, legal, and organisational challenges that must be overcome for such changes to be implemented at scale. 相似文献
202.
Torres-Martín César Acal Christian El-Homrani Mohammed Mingorance-Estrada Ángel C. 《Educational technology research and development : ETR & D》2022,70(3):909-929
Educational technology research and development - The objective has been to know the impact of the flipped classroom methodology on the academic performance of students during their training... 相似文献
203.
Mazon Cécile Etchegoyhen Kattalin Saint-Supery Isabeau Amestoy Anouck Bouvard Manuel Consel Charles Sauzéon Hélène 《Educational technology research and development : ETR & D》2022,70(1):231-262
Educational technology research and development - In recent years, many psycho-educational technologies were studied to address the school-related difficulties encountered by students with autism... 相似文献
204.
Seckel María José Vásquez Claudia Samuel Marjorie Breda Adriana 《Education and Information Technologies》2022,27(3):2955-2975
Education and Information Technologies - Computational thinking in the educational environment has awaken a rising interest, having been included as part of the curricula from the very beginnings... 相似文献
205.
Learning Environments Research - Background When novice teachers start working in a school, it is vital that they are aware of the moral aspects of the work environment and can use their moral... 相似文献
206.
De Loof Haydée Boeve-de Pauw Jelle Van Petegem Peter 《International Journal of Science and Mathematics Education》2022,20(7):1291-1313
International Journal of Science and Mathematics Education - The “leaky pipeline” with regard to students’ engagement in Science, Technology, Engineering, and Mathematics (STEM)... 相似文献
207.
Education and Information Technologies - In the present study, students’ perceptions of their self-directed and collaborative learning with and without technology were examined in... 相似文献
208.
Núria Balagué Petra Düren Arja Juntunen Jarmo Saarti 《The Journal of Academic Librarianship》2014,40(5):529-533
From the beginning of the 1990s, different types of quality management and evaluation systems have become integrated into higher education institutes throughout Europe due to the creation of the European Higher Education Area (EHEA). This has meant that the university libraries have had to learn how to evaluate their services and improve their quality. Quality audits are one tool that can be used in quality management approaches to assess how well an organization is being managed. This paper describes and benchmarks the use of external and internal auditing in three European academic libraries, i.e. the Medical Library of the University Medical Center Hamburg-Eppendorf (Germany), the Universitat Autònoma de Barcelona Library (Spain) and the University of Eastern Finland Library (Finland). The results reveal the best practices of auditing in these institutions; and recommendations are provided for the further development of library auditing and ways to improve co-operation between libraries. 相似文献
209.
Since the first Olympic Games, the figure of the athlete has roused enormous passion. One may wonder if nowadays the cultural mechanisms that produce them are analogous and perform the same functions as in the past. This article aims to answer these questions. For this purpose, we have relied on the analysis of the discourse from different actors in the 2010 European Symposium of Sports “Thinking Sports, Transforming Society: The EU in favor of citizenship for the XXI Century”. The results will provide relevant information about the responsibility of the mass media in the production of a sports spectacle, the role of the big brands and the exemplarity of the sports’ elite. In this manner, the need was conveyed of producing a different view of sports, so that in the contest between humanistic values and materialistic values, those who contribute to the welfare of the citizens could achieve glory. 相似文献
210.