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   374篇
  免费   8篇
教育   282篇
科学研究   23篇
各国文化   8篇
体育   18篇
文化理论   3篇
信息传播   48篇
  2023年   8篇
  2022年   6篇
  2021年   8篇
  2020年   18篇
  2019年   19篇
  2018年   35篇
  2017年   23篇
  2016年   21篇
  2015年   9篇
  2014年   20篇
  2013年   75篇
  2012年   12篇
  2011年   7篇
  2010年   8篇
  2009年   8篇
  2008年   8篇
  2007年   3篇
  2006年   8篇
  2005年   6篇
  2004年   8篇
  2003年   3篇
  2002年   5篇
  2001年   4篇
  1996年   4篇
  1994年   3篇
  1993年   1篇
  1992年   2篇
  1991年   6篇
  1990年   2篇
  1989年   1篇
  1988年   3篇
  1987年   4篇
  1986年   1篇
  1985年   1篇
  1984年   3篇
  1981年   1篇
  1979年   2篇
  1978年   4篇
  1977年   1篇
  1976年   1篇
  1974年   1篇
  1973年   3篇
  1971年   1篇
  1970年   3篇
  1969年   1篇
  1965年   2篇
  1963年   1篇
  1961年   2篇
  1959年   1篇
  1898年   1篇
排序方式: 共有382条查询结果,搜索用时 15 毫秒
91.
In this paper, we define a class of almost orthogonal rational functions of Legendre type in a new manner. Relations of these functions with classical exponentional functions orthogonal over interval (0, ), as well as classical polynomials orthogonal over (0, 1) are explained. Defining relations of these functions can be used for designing almost orthogonal filters. These filters are generators of orthogonal signals and can be successfully applied in finding the best signal approximation in the sense of the mean square error. The filters orthogonal property enables building of physical (in this case electrical) models of dynamical systems (the sources of signals to be approximated) either with less components for the same model accuracy or higher accuracy for the same number of components than the other known models. New filters represent further improvement of previously designed filters, by the same authors, in the sense of simplicity, higher accuracy, lesser approximation time and even a possibility to approximate signals generated by systems with built-in imperfections. Series of experiments were performed to analyze the dependence of approximation accuracy and the number of filters sections.  相似文献   
92.
University students’ drop-out is a crucial issue for the universities’ efficiency evaluation and funding. In this paper, we analyze the drop-out rate of the Economics and Business faculty of Sapienza University of Rome. We use administrative data on 9,725 undergraduates students enrolled in three-years bachelor programs from 2001 to 2007 and perform a Generalized Linear Mixed Model. Our aim is to improve the general understanding of the students’ withdrawing focusing on personal characteristics of students rather than on institutional aspects of the university. The empirical analysis unveils the statistically significant effect of students’ characteristics, like citizenship and income, while the main findings relate a high drop-out probability to a high secondary school final mark and a low individual students’ performance.  相似文献   
93.
94.
95.
As a response to the University of Kansas' (KU) strategic planning process and the need to identify budgetary efficiencies, the KU Libraries created a strategic plan and underwent a structural reorganization. In the new structure, the libraries went from thirty librarians doing collection development to seven selecting library materials for the core collection. The new, smaller, more agile department is responsible for all tasks related to collection development as the library moves from being a collection-centered institution to being user-centered. The new organization shifts the collection development paradigm from one based on academic disciplines to one that embraces a holistic view.  相似文献   
96.
Public libraries have a huge potential to be creators and facilitators of social innovation in communities and society. Qualitative research based on interviews with 27 librarians showed that social innovation in libraries can take the form of educational and cultural activities, leisure and networking activities and social support services. The main goal of the research was to find out what factors support and make these innovations difficult in public libraries. A four-layer model of barriers and stimulators for social innovation is presented, which includes structural, local, organizational and personnel levels. The model could serve to inform librarians, their stakeholders and governments about all levels of barriers and stimulators connected to innovation of library services and social re-positioning of public libraries in the future.  相似文献   
97.
This study examined how doulas adapt to challenges in client’s labors. There were 104 Canadian and 92 American doulas who responded to a survey distributed at a doula conference. We report results from open-ended questions in which doulas describe how they manage changes deviating from the mother’s birth plan and how they navigate differences of opinion between themselves and providers. Four themes emerged: giving nonjudgmental support, assisting informed decision making, acting as a facilitator, and issues with advocacy. Although 30% of doulas said that advocacy and information giving could result in conflict with providers, doulas reported working within their scope of practice and striving to be part of the team. Issues in doula responsibility and patient advocacy remain, and ongoing role clarification is needed.  相似文献   
98.
This paper is an attempt to describe and critically analyse the emergence and development of education that is directed at promoting citizens' empowerment and responsibility in the framework of political changes and democratic challenges that Croatia faces as a post-Communist and post-war country within a prospect of European integration. In the beginning, a short reference to a politically unstable, economically extremely unfavourable and culturally complex context of education for democratic citizenship is given. Following the vision/provision/implementation/evaluation rationale for achieving the expected results, the author addresses three main issues: the changes in the government's priorities for the period 1991-2001, with special emphasis on education; the implementation measures that support educational changes pertinent to the quest for citizens' empowerment; and their actual outcomes. The gap that exists between the visions and reality is explained as resulting from number of structural and psychological barriers that may be resolved through a more pronounced, coherent and co-ordinated development-oriented policy and implementation strategy based on consensus and commitment.  相似文献   
99.
This article takes a close analytical look at the internationalization of higher education, asking penetrating questions with regard to its basis, its forms, and its results. The author is particularly concerned with problems of asymmetry with regard to the educational links, particularly at higher education level, between the developed western democracies and the developing countries. Going beyond the question of brain drain, the article probes the problem of the alienation of third world academics trained in the higher education institutions of developed countries. While on the balance the author praises the results of the internationalization of higher education and, at any rate, recognizes that it is here to stay, he cautions all those involved in it be aware of who in fact gains and who loses as a result of it.  相似文献   
100.
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