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   187篇
  免费   3篇
  国内免费   1篇
教育   133篇
科学研究   43篇
各国文化   3篇
体育   3篇
信息传播   9篇
  2023年   3篇
  2022年   9篇
  2021年   8篇
  2020年   3篇
  2019年   11篇
  2018年   19篇
  2017年   6篇
  2016年   19篇
  2015年   8篇
  2014年   4篇
  2013年   20篇
  2012年   12篇
  2011年   8篇
  2010年   8篇
  2009年   8篇
  2008年   6篇
  2007年   7篇
  2006年   7篇
  2005年   2篇
  2004年   1篇
  2003年   3篇
  2001年   2篇
  1998年   3篇
  1997年   1篇
  1996年   1篇
  1994年   1篇
  1993年   1篇
  1987年   1篇
  1986年   1篇
  1984年   1篇
  1982年   2篇
  1979年   2篇
  1978年   1篇
  1975年   2篇
排序方式: 共有191条查询结果,搜索用时 31 毫秒
151.
Tertiary Education and Management - International higher education is a major source of revenue in many developed countries. Historically the top destination countries for international students...  相似文献   
152.
We have designed, demonstrated, and characterized a simple, novel in-plane tunable optofluidic microlens. The microlens is realized by utilizing the interface properties between two different fluids: CaCl(2)solution and air. A constant contact angle of ~90° is the pivotal factor resulting in the outward bowing and convex shape of the CaCl(2) solution-air interface. The contact angle at the CaCl(2) solution-air interface is maintained by a flared structure in the polydimethylsiloxane channel. The resulting bowing interface, coupled with the refractive index difference between the two fluids, results in effective in-plane focusing. The versatility of such a design is confirmed by characterizing the intensity of a traced beam experimentally and comparing the observed focal points with those obtained via ray-tracing simulations. With the radius of curvature conveniently controlled via fluid injection, the resulting microlens has a readily tunable focal length. This ease of operation, outstandingly low fluid usage, large range tunable focal length, and in-plane focusing ability make this lens suitable for many potential lab-on-a-chip applications such as particle manipulation, flow cytometry, and in-plane optical trapping.  相似文献   
153.
Some partial derivative properties of the impedance function of a resistively-terminated network which is a cascade of m lossless two-ports of variables p1 to pm dre established. Those cases where some of the lossless two-ports are lowpass or highpass ladder networks with all of their transmission zeros at the origin or at infinity are also examined. Necessary and sufficient conditions involving partial derivatives and under which an m-variable reactance or positive real function can be realized as the impedance function of a pi-variable lowpass or highpass ladder network, with all of its transmission zeros at pi = 0 or pi = ∞, and terminated in a reactance or positive real impedance function in the other variables are derived.  相似文献   
154.
155.
The mobility of African students beyond national territories has become common worldwide. However, the underlying reasons motivating students to leave their countries of origin in pursuit of higher education in other developing nations and why these factors are important have not been fully explored. This study attempts to explore why and how African students travel to the United Arab Emirates for higher education. A push-pull factor theory of the international student’s choice of destination is developed to identify factors influencing the choices made by these students. The analytic hierarchy process is used to examine the relative importance of these factors. The findings of this quantitative study indicate that learning environment and geographic proximity are the two most important factors for African students, while other factors have a moderate impact. The findings contribute to a deeper and more comprehensive understanding of the needs and choices of existing and potential students from this continent, with a view to applying a segmentation approach to attract these students.  相似文献   
156.
In this paper, we aim to contribute to the discussion of the role of the human body and of the concrete artefacts and signs created by humankind in the constitution of meanings for mathematical practices. We argue that cognition is both embodied and situated in the activities through which it occurs and that mathematics learning involves the appropriation of practices associated with the sets of artefacts that have historically come to represent the body of knowledge we call mathematics. This process of appropriation involves a coordination of a variety of the semiotic resources??spoken and written languages, mathematical representation systems, drawings, gestures and the like??through which mathematical objects and relationships might be experienced and expressed. To highlight the connections between perceptual activities and cultural concepts in the meanings associated with this process, we concentrate on learners who do not have access to the visual field. More specifically, we present three examples of gesture use in the practices of blind mathematics students??all involving the exploration of geometrical objects and relationships. On the basis of our analysis of these examples, we argue that gestures are illustrative of imagined reenactions of previously experienced activities and that they emerge in instructional situations as embodied abstractions, serving a central role in the sense-making practices associated with the appropriation of mathematical meanings.  相似文献   
157.
This paper is grounded in a qualitative approach, to call forth the views of Muslim teenage girls on their access and use of learning technologies for inclusive educational practice. The 45 Muslim teenage girls, aged 14–19 years old, from three British Muslim girls schools participated in this empirical study. Semi-structured interviews were used for data collection and the data were analysed using template analysis, matrix analysis, and cross-case analysis. The pupils had strong aspirations that learning technologies and computers should support their learning and attainment, but their access and use to supporting technologies was mixed. It was found through a comparative analysis of the data that all the Muslim teenage girls that entered Muslim schools felt secure and performed competently. Furthermore, the educational success of School A was attributable to educational norms and values relative to the provision of digital resources and skilled teaching staff. The educational experiences of School B and School C were more variable due to access to digital technologies, provision of digital contents and skilled teaching staff. Furthermore, this research study seems to highlight a marked difference between the Muslim School environment and the social context of teenage girls outside the educational setting.  相似文献   
158.
159.
160.
This study was undertaken to investigate the use of social networks and political activism on the Internet by the students of three universities of Islamabad and Rawalpindi during the political crises for the last one year and the emergency imposed by the Government of Pakistan on November 3, 2007. The findings conclude that Internet use by the students promoted democracy, freedom of expression and greater awareness about their rights during the political crises in Pakistan.

The survey method of research was used to collect data. The sample consisted of 420 students studying at the Quaid-e-Azam University Islamabad, Fatima Jinnah Women University, Rawalpindi, and International Islamic University Islamabad, Pakistan. The questionnaire was sent to the students by email. The survey was administered through SurveyMonkey website. The response rate was 72.23%.

The paper is a useful source of information about how the social networking tools have been influencing and changing communication channels in Pakistan.  相似文献   
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