全文获取类型
收费全文 | 3321篇 |
免费 | 47篇 |
国内免费 | 5篇 |
专业分类
教育 | 2394篇 |
科学研究 | 233篇 |
各国文化 | 50篇 |
体育 | 398篇 |
综合类 | 6篇 |
文化理论 | 80篇 |
信息传播 | 212篇 |
出版年
2023年 | 25篇 |
2022年 | 55篇 |
2021年 | 100篇 |
2020年 | 131篇 |
2019年 | 191篇 |
2018年 | 247篇 |
2017年 | 243篇 |
2016年 | 204篇 |
2015年 | 147篇 |
2014年 | 167篇 |
2013年 | 712篇 |
2012年 | 189篇 |
2011年 | 129篇 |
2010年 | 90篇 |
2009年 | 78篇 |
2008年 | 79篇 |
2007年 | 70篇 |
2006年 | 54篇 |
2005年 | 50篇 |
2004年 | 44篇 |
2003年 | 36篇 |
2002年 | 47篇 |
2001年 | 26篇 |
2000年 | 29篇 |
1999年 | 12篇 |
1998年 | 20篇 |
1997年 | 14篇 |
1996年 | 20篇 |
1995年 | 15篇 |
1994年 | 14篇 |
1993年 | 7篇 |
1992年 | 11篇 |
1991年 | 10篇 |
1990年 | 12篇 |
1989年 | 9篇 |
1988年 | 6篇 |
1987年 | 5篇 |
1985年 | 4篇 |
1984年 | 3篇 |
1983年 | 4篇 |
1981年 | 4篇 |
1980年 | 8篇 |
1979年 | 4篇 |
1978年 | 6篇 |
1977年 | 6篇 |
1963年 | 3篇 |
1960年 | 2篇 |
1872年 | 4篇 |
1871年 | 2篇 |
1870年 | 3篇 |
排序方式: 共有3373条查询结果,搜索用时 16 毫秒
71.
72.
73.
Luis Marques Joa˜o Praia Richard Kempa 《Research in Science & Technological Education》2013,31(2):265-278
This paper reports the findings of a preliminary evaluation of an in-service training programme designed for practising geology/earth science teachers in Portuguese high schools and intended to enhance the effectiveness of fieldwork activities organised by them for their students. Among the points particularly stressed during the in-service training were that students should be adequately prepared for fieldwork through classroom-based activities prior to the fieldwork itself and that to arrive at the maximum educational benefit for the students, they should be involved in collaborative group-based investigation. The findings, derived from an enquiry among students following their exposure to fieldwork, revealed that in both these aspects teachers failed to put theory into practice, probably as the result of a lack of confidence to implement novel procedures. On the positive side, the students reported that they enjoyed the social interaction with other students that the fieldwork made possible and the opportunity to work independently of the teachers. 相似文献
74.
75.
In this paper the authors present a preliminary discussion on some of the results from a survey aimed to explore, describe and explain some of the usability characteristics in digital libraries evaluation in the Mexican context. The study is framed in the evaluation of a multinational and monolingual digital library: the Miguel de Cervantes Virtual Library, from the University of Alicante in Spain. The evaluators were Mexican “expert” users (i.e. Spanish-speaking professional university librarians specialized in electronic reference services) who were asked to carry on an evaluation instrument based on usability criteria as taken from some models in developed countries. Some questions that might be answered with future research are outlined in this paper. 相似文献
76.
David Nicholas Director of CIBER Professor at Director of the School of Library Paul Huntington Senior Researcher a founder member of CIBER SLAIS University College London WCE BT UK Hamid R. Jamali a researcher in CIBER SLAIS University College London WCE BT UK 《The Journal of Academic Librarianship》2007,33(6):629-638
The logs of four universities using the OhioLINK journal system were evaluated for a period of fifteen months using deep log analysis methods in order to compare and contrast the information seeking behaviour of their users. Large differences were found, especially between the research and teaching universities. Methodological problems associated with making the comparisons are discussed in some detail especially in terms of defining online sessions. 相似文献
77.
Public administrations have been very much concerned since the 1980s about the need of avoiding vendor lock-in when procuring themselves with information technology (IT) infrastructure. The boost of e-government that has taken place in recent years has put this concern again in the agenda of public administrations. Interoperability has shown up as a principle in the conception and deployment of the e-government initiatives, and the interoperability frameworks have been the tool for implementing the principle. In this paper, the use of the interoperability frameworks and of the enterprise architectures within the e-government initiatives is surveyed. The scope of the survey is Europe and the United States. As far as the author is aware, all trends in interoperability policy fall within the scope of the survey. The survey is focused on the methodological tools that e-government agencies have devised for achieving the interoperability at the public administrations. The tools are interoperability frameworks and enterprise architectures. 相似文献
78.
79.
80.