首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   12032篇
  免费   6篇
  国内免费   1篇
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
  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  
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.
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.
44.
45.
46.
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.
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.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号