UPS电源技术性能及可用性比较     

牛涛 《人天科学研究》2011,10(1):65-67

UPS已广泛应用于各个领域。介绍并讨论了UPS的分类、工作原理、适用范围;比较了各种技术的优缺点;介绍了UPS技术的新动向。  相似文献   

Mean Shift算法在彩色图像分割中的应用     

曹小玲 《人天科学研究》2011,(11):79-81

Mean Shift算法是目前广泛应用于图像分割和计算机视觉中的方法。论述了该算法应用在彩色图像分割中的原理及过程,并给出实验过程和结果。  相似文献   

Instructor-provided summary infographics to support online learning     

Silvia Elena Gallagher  Mairtin O’Dulain  Niamh O’Mahony  Claire Kehoe  Fintan McCarthy  Gerard Morgan 《Educational Media International》2017,54(2):129-147

Infographics are a visualisation tool that can be used to improve retention, comprehension and appeal of complex concepts. The rise of infographic use in education has facilitated new forms of application and design of these tools. Instructor-provided summary infographics are a new form of infographic, whereby key learning objectives and content are summarised in graphical form at the end of a lesson. However, it is unknown whether these types of infographics can support learning in online environments. This exploratory research investigates student perceptions, retention, applications and activity generation of instructor-provided summary infographics in a massive online learning environment. Using both post-course learner survey data (n = 1,899) and text mining analysis (n = 72,490 words), results present how learners perceived instructor-provided summary infographics as useful and appealing for retaining, clarifying and understanding learning concepts. The research contributes a novel understanding of summary infographics in online learning environments, and supports their use as a design tool for educational delivery in the online space.  相似文献   

Fixing higher education through technology: Canadian media coverage of massive open online courses     

Delia Dumitrica 《Learning, Media and Technology》2017,42(4):454-467

The popularization of massive open online courses (MOOCs) has been shrouded in promises of disruption and radical change in education. In Canada, official partnerships struck by higher education institutions with platform providers such as Coursera, Udacity and edX were publicized by dailies and professional magazines. This print coverage of MOOCs captures the contemporary ideological struggle over the meaning of both technology and higher education. By means of a thematic analysis of the English Canadian print coverage of MOOCs (2012–2014), this paper shows that both online educational technologies and higher education are constructed through an economic frame. However, this frame does not go unchallenged. Where newspapers construct MOOCs as an easy fix for an allegedly inefficient and outdated higher education system, professional magazines question the relationship between technology, higher education and money. These different representations point to the efforts of academic communities to develop alternative social imaginaries of education as public good within a dominant neoliberal framing of MOOCs and of the higher education system. In conclusion, the paper reflects on how the academic community can create alternative discursive spaces by shifting the discussion of MOOCs from economic concerns to civic goals.  相似文献   

校企合作模式下基于工作过程的学习情境设计——以《模具数控加工技术》课程为例   总被引：1，自引：0，他引：1  

谢暴  杜兰萍  刘艳华 《职业技术教育》2011,32(2)

从学习领域课程开发向学习情境设计的转换,既是学习领域的具体化,也是衡量学习领域课程方案设计是否成功的关键。对《模具数控加工技术》课程进行学习情境设计,应紧密围绕学习领域课程的学习目标、内容及总学时,进行具体化的分解和设计,进而形成每一个学习情境的明确的能力目标、内容要求和学时限制。  相似文献   

大规模网络开放课程（MOOC）典型项目特征分析及启示     

王颖  张金磊  张宝辉 《电大教学》2013,(4):67-75

从2012年开始,以在线课程为核心的互联网公司纷纷涌现并获得飞速发展。大规模网络开放课程（MOOC）为学习者提供了一种新的知识获取渠道和学习模式,成为网络时代人们学习的新途径。通过梳理和总结MOOC发展的历史,并对MOOC初步分析的基础上,选择七个国外典型的MOOC项目作为分析对象,根据对各项目的基本信息进行内容分析确定关键词,从组织机制、平台定位、课程组织、课程资源、教学方式和质量认证六个方面,归纳大规模网络开放课程项目的主要特点,并从运营机制、课程开发、学生参与和学习评价四个方面提出指导我国开放教育资源进一步发展的启示。  相似文献   

信息加工理论视角下贵州市州高校大学英语词汇教学探析     

李会菊 《毕节师范高等专科学校学报》2013,(10):108-111

人类认知过程的本质是信息处理的过程,事实上英语词汇学习过程也是一个信息处理过程。针对贵州市州高校非英语专业大学生词汇能力不强的现状和大学英语的教学实际,以信息加工理论为基础,运用联想、隐喻和转喻概念等进行信息加工教学,提出大学英语教学词汇语义加工策略,力求走出贵州市州高校大学英语教学困境,为大学英语词汇教学提供新的思路和办法。  相似文献   

“It's not as if we've been teaching them…” reflective thinking in the outdoor classroom     

Tony Rea 《Journal of Adventure Education & Outdoor Learning》2013,13(2):121-134

Abstract

Research undertaken during a six week mountaineering expedition to Iceland in July 2003 set out to investigate approaches to facilitating the reflective process in 20 participants aged between 14 and 18. A number of models were examined to help determine the educational philosophy underpinning the expedition. The research methods involved documentary searches, observations and semistructured interviews. Findings suggest that the approach of expedition leaders accorded with the ‘mountains speak for themselves’ model as the leadersmade little or no attempt to encourage, facilitate or enable reflection on the part of participants. With few exceptions the participants did, however, engage in reflective thought both about the activities they had been involved in and the holistic benefits of the expedition. The findings suggest that whilst the facilitator/interventionist model and the Kolb cycle do little to explain the pedagogy within this expedition, there was evidence of much reflective learning from the participants.  相似文献   

Using the EPPM to Create and Evaluate the Effectiveness of Brochures to Increase the Use of Hearing Protection in Farmers and Landscape Workers     

Sandi W. Smith  Kenneth D. Rosenman  Michael R. Kotowski  Edward Glazer  Courtnay McFeters  Nicole M. Keesecker 《Journal of Applied Communication Research》2013,41(2):200-218

The extended parallel process model was employed to increase intentions to use on-the-job hearing protection among agricultural workers. Brochures were designed to increase perceptions of the threat of hearing loss and the efficacy of hearing protection to avert hearing loss. Brochures were presented to one half of the sample in each population (farmers and landscapers), and a questionnaire was administered assessing perceptions of threat, efficacy, and intentions. The other half of each sample completed the questionnaire, and then received brochures. Results indicated that farmers were initially high in threat and efficacy perceptions, but brochure exposure resulted in higher intentions to use hearing protection. Landscapers perceived higher threat, efficacy, and intentions after being presented with the brochure. Results are discussed in terms of future research and practical application.  相似文献   

Supervisor Impression Management: Message Content and Channel Effects on Impressions     

Catherine Y. Kingsley Westerman 《Communication Studies》2013,64(5):585-601

The current study focuses on the delivery of negative feedback and how supervisors can accomplish that delivery while maintaining their own image and their employees' face. We look at delivery of feedback with and without face-saving messages through two different channels: face-to-face (FtF) and email. Results indicate that the inclusion of face-saving messages had relatively consistent positive effects on a variety of employees' impressions of supervisors. Channel was found to interact with message content to impact perceived face threat of a message and the perception of the supervisor's appropriateness. These findings are discussed in terms of theoretical and practical applications, as are limitations and directions for future research.  相似文献