全文获取类型
收费全文 | 12032篇 |
免费 | 6篇 |
国内免费 | 1篇 |
专业分类
教育 | 9229篇 |
科学研究 | 1241篇 |
各国文化 | 9篇 |
体育 | 406篇 |
文化理论 | 392篇 |
信息传播 | 762篇 |
出版年
2023年 | 3篇 |
2022年 | 3篇 |
2021年 | 7篇 |
2020年 | 16篇 |
2019年 | 26篇 |
2018年 | 2205篇 |
2017年 | 2091篇 |
2016年 | 1586篇 |
2015年 | 118篇 |
2014年 | 132篇 |
2013年 | 193篇 |
2012年 | 238篇 |
2011年 | 711篇 |
2010年 | 845篇 |
2009年 | 452篇 |
2008年 | 655篇 |
2007年 | 1160篇 |
2006年 | 79篇 |
2005年 | 401篇 |
2004年 | 456篇 |
2003年 | 361篇 |
2002年 | 131篇 |
2001年 | 12篇 |
2000年 | 25篇 |
1999年 | 2篇 |
1998年 | 8篇 |
1997年 | 17篇 |
1996年 | 6篇 |
1994年 | 3篇 |
1993年 | 5篇 |
1992年 | 5篇 |
1991年 | 14篇 |
1990年 | 6篇 |
1988年 | 2篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 6篇 |
1975年 | 3篇 |
1967年 | 2篇 |
1966年 | 2篇 |
1904年 | 3篇 |
1903年 | 3篇 |
1843年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
Novel high torque bearingless two-sided rotary ultrasonic motor 总被引:3,自引:0,他引:3
LI Xia CHEN Wei-shan XIE Tao LIU Jun-kao 《浙江大学学报(A卷英文版)》2007,8(5):786-792
Applications are limited at present because the currently available ultrasonic motors (USMs) do not provide suffi-ciently high torque and power. The conventional travelling-wave USM needs the bearing to support, which required lubricant. To solve the above problem, a bearingless travelling-wave USM is designed. First, a novel structure of the two-sided USM consisting of a two-sided teeth stator and two disk-type rotors is designed. And the excitation principle of the two-sided travelling-wave USM is analyzed. Then, using ANSYS software, we set up the model of the stator to predict the excitation frequency and modal response of the stator. The shape of the vibration mode was obtained. Last, the load characteristics of the USM are measured using ex-perimental method. The maximum stall torque and the no-load speed were obtained. The results showed that the characteristics of the two-sided USM are better than those of the conventional one-sided USM. 相似文献
42.
You Guo Jiang 《Frontiers of Education in China》2013,8(2):326-329
Contemporary international higher education scholarship tends to focus on the global financial crisis,on massification,privatization,cross-border education,university ranking,and student mobility.However,few studies deal with the development of liberal arts programs around the world and they are often related to Western systems of higher education or that of the US,where liberal arts education has long been seen as a fundamental issue.Comparative studies,however,could help scholars to become aware of critical trends and reforms,also the impact they might have on a global society. 相似文献
43.
Walter Hahn Guy Cellerier Wolfgang Wilhelm Jindra Kulich Robert J. Havighurst Bryan T. Peck Annegret Körner Rodney Skager Renate Nestvogel J. H. Sislian John J. Bergen Peter W. Kahl Tony Bates 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1978,24(4):523-544
44.
45.
46.
Jinyuan Ma 《Frontiers of Education in China》2014,9(1):89-109
This article explores the way in which the World Bank has worked effectively with China in higher education. It investigates whether or not the cooperation between the two has changed in line with their changing relationship. More specifically, it discusses whether the World Bank’s China agenda reflects the reform package of socio-institutional neoliberalism which the World Bank has tended to promote worldwide in the era of the Post-Washington Consensus, and how China’s higher education reform has been influenced by the agenda. The article argues that as China is transferring its role from that of a recipient country to that of a donor country, it is increasingly important to position itself as a global player. Other than mastering the game rules of the international community, China should also expand its influence within and through these major international organizations. 相似文献
47.
Yuzhuo CAI 《Frontiers of Education in China》2014,9(3):377-402
This paper explores ways to enhance overseas Chinese graduate employability by taking Finnish-educated Chinese students/graduates as an example. In so doing, it understands that graduate employability development is a joint effort of multiple stakeholders including students, graduates, academics, program coordinators, employers, and policymakers. Accordingly, it provides arguments and suggestions for how to enhance the employability of these graduates in terms of the labor market context, employers’ beliefs and actions, the responsibilities of higher education institutions, and student/graduate commitment. It also points out two major challenges faced by overseas Chinese graduates as well as their educational providers, which are linked respectively to gaps between what graduates acquire in higher education and what is required in the labor market, as well as gaps from the employers’ perspective: areas where employers need to understand more about universities and catch up with new ideas generated by them. 相似文献
48.
49.
50.