共查询到20条相似文献，搜索用时 31 毫秒
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Smart classroom (SC) is an important embodiment of the new teaching mode in online and offline integration in the COVID-19. At present, the research on the evaluation system of teacher-student interaction (TSI) in SC lacks evaluation system to guide the development of students’ higher order thinking (HOT). This evaluation system of TSI was established through grounded theory, Delphi method and analytic hierarchy process. The evaluation system for TSI considered the support of intelligent technology for various indicators and the development of students’ HOT. The evaluation system included 4 first level indicators, 16 s level indicators and 44 third level indicators. The evaluation system had been comprehensively evaluated the TSI activities, which was conducive to the development of students’ HOT.Data availabilityData used in this research are available upon request from the corresponding author. 相似文献
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Using FEM to predict tree motion in a wind field 总被引：1，自引：0，他引：1
In this paper we propose a finite element （FE） simulation method to predict tree motion in a wind field, Two FE tree models were investigated： One model was generated based on a realistic nature-looking geometric tree model, and the other was a symmetric model to investigate the influence of asymmetric material properties on tree motion. The vortex-induced vibration （VIV） theory is introduced to estimate the fluctuating wind force being exerted on tree stems and the fluid-structure interaction （FSI） analysis is also included in the simulation. The results indicate that asymmetric material properties result in the crosswind displacement of the investigated node and the main swaying direction deviation. The simulation reveals that under wind loading, a tree with leaves has much larger swaying amplitude along the wind direction and longer swaying period than a tree without leaves. However, the crosswind swaying amplitude is mainly due to branch interaction. The numerical simulation proved that the interaction of tree branches can prevent dangerous swaying motion developing. 相似文献
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This article reports on an exploratory project in which technology and dynamic social network analysis (SNA) are used for modelling classroom interaction. SNA focuses on the links between social actors, draws on graphic imagery to reveal and display the patterning of those links, and develops mathematical and computational models to describe and explain those patterns. Dynamic SNA extends SNA and builds on previous research on network change. Utilizing data from six videos from the TIMSS video study and a convenience sample of five observations of one teacher in a secondary school in the south of England, a methodology for dynamic SNA was applied to classroom interaction data. The results are in two ways relevant for this journal. Firstly, they show that recent developments in SNA might be usefully applied to furthering knowledge about the dynamics of classroom interaction. Secondly, the results provide an example of the use of tablet technology for fieldwork data collection. 相似文献
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采用表观黏度法,以黏度增长因子R为指标,对聚丙烯酰胺(PAM)与聚乙二醇(PEG)在水中的相互作用进行研究,并考察PAM摩尔分数、PEG相对分子质量、剪切速率和温度对其相互作用的影响。结果表明:混合体系中PAM与PEG之间的相互作用表现为表观黏度的降低,主要为疏水、氢键及相互缠结作用等;当体系中PAM的摩尔分数为0.6时,相互作用最强;该作用随PEG相对分子质量的增大而略增强,随剪切速率的增加先增大后减小,随温度的升高先减小后增大。表观黏度法快捷简便,适用于溶液中聚合物分子间相互作用的研究。 相似文献
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远程教育的核心是远程学习,社会性交互是远程学习的重要组成部分,它不但可以促进学习者知识的建构,也是教师开展网上教学的重要手段。回顾近十年来国内社会性交互的相关研究,对社会性交互研究在生生交互、师生交互以及交互策略三方面取得的成果进行了总结,分析目前国内社会性交互存在的问题,同时指出了每个方面研究的具体方向。 相似文献
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协作学习投入面临多维、动态数据采集与多元数据融合分析的挑战,而多模态交互分析能够提取并融合动态、多维度的投入信息,对表征协作学习交互过程具有重要价值。基于此,文章构建了基于多模态交互信息的协作学习投入分析指导框架,并从投入水平的整体性表征、投入状态的多维性分析和投入信息的时序性挖掘等角度,阐述了协作学习投入分析应考虑的关键问题。此外,文章还提出了包含多模态信息采集、多模态特征提取、多模态特征融合分析等三大模块构成的多模态交互信息分析路径。研究结论显示,多模态交互信息能实现对协作交互过程全方位、细粒度地记录,进而对小组协作学习投入的状态进行动态表征与持续分析。未来研究可能的方向在于基于智能语音处理技术的交互会话分析、基于仪表盘的投入信息可视化呈现以及基于智能代理的协作投入适应性支持。 相似文献
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利用ABAQUS有限元软件,开展不同材料微型桩—土动力相互作用的影响研究,桩身材料分别选为C40普通混凝土、C60普通混凝土、钢管混凝土、RPC混凝土。分析结果表明,由于弹性模量发生变化,不同材料微型桩的桩身弯矩存在明显差异;桩身材料的弹性模量过大会使微型桩的变形减弱;与静力荷载作用不同的是,动力荷载作用下的微型桩在上、下土层范围分别出现了一正一负两个较明显的桩周土反力峰值点。相关研究结论对指导微型桩的设计具有参考价值。 相似文献
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新生研讨课在于帮助大学生加强自我认知、激发学习兴趣、建立同伴关系、参与大学等。而教学互动的本质在于教育主体间的交互作用,更利于实现高校新生研讨课目的和功能。以南京大学新闻传播学院杜骏飞教授的新生研讨课“媒介案例研究”为个案,主要运用问卷调查、访谈法和文本研究等研究方法对教学互动的现状进行了研究,从教学互动主体、互动时空和互动内容三个维度探索构建研究型大学新生研讨课的教学互动模式并加以诠释。 相似文献
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The purpose of this study was to examine the effectiveness of intensive interaction during interactive play between a preschool boy with autism and his teacher and, as a consequence, improve the social interaction between the boy and a non-autistic girl in an inclusive class in Greece. A single subject ABA design was applied. Observed variables included changes in the frequency of initiations and responses of the two children. Results indicated significant improvement and post-training maintenance in the social interaction of the two children. Discussion of results in light of known research in autism is highlighted and implications are discussed. 相似文献
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Water distribution networks are essential components of water supply systems. The combination of pipe structural deterioration and mechanics leads to the failure of pipelines. A physical model for estimating the pipe failure must include both the pipe deterioration model and mechanics model. Winkler pipe-soil interaction （WPSI）, an analytical mechanics model developed by Rajani and Tesfamariam （2004）, takes external and internal loads, temperature changes, loss of bedding support, and the elastoplastic effect of soil into consideration. Based on the WPSI model, a method to evaluate the elastic and plastic areas was proposed in the present study. An FEM model based on pipe-soil interaction （PSI） element was used to verify the analytical model. Sensitivity analyses indicate that the soft soil, long pipe and high temperature induced the axial plastic deformation more likely, which, however, may not occur in normal scenarios. The soft soil, pipes in small diameters, long unsupported bedding are prone to form flexural plastic area. The results show that the pipes subjected to the same loads have smaller stresses in the elastoplastic analysis than elastic analysis. The difference, however, is slight. 相似文献
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The activation of Ca2 entry through store-operated channels by agonists that deplete Ca2 from the endoplasmic reticulum (ER)is a ubiquitous signaling mechanism,the molecular basis of which has remained elusive for the past two decades.Store-operated Ca2 -release-activated Ca2 (CRAC)channels constitute the sole pathway for Ca2 entry following antigen-receptor engagement.In a set of breakthrough studies over the past two years,stromal interaction molecule l(STIM1,tbe ER Ca2 sensor) and Orail(a pore-forming subunit of the CRAC channel)have been identified.Here we review these recent studies and the insights they provide into the mechanism of store-operated Ca2 channels(SOCCs). 相似文献
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童晓燕 《淮南师范学院学报》2014,(4):101-104
幽默言语交际失败有着深刻的认知原因,从认知语用的角度,在交际者认知语境能否互显、听者能否辨别说话者信息意图和交际意图方面的差异、以及听者能否实现认知框架的动态转换方面寻找幽默交际失败的原因,为幽默言语交际失败做出一个初步的解释。 相似文献
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院校影响因素理论模型是美国大学生发展理论的重要组成部分。院校影响因素理论模型旨在阐释学生成果产出的影响因素与过程。阿斯丁的I-E-O模型、丁托的学生离校模型和帕斯卡雷拉的学生发展综合因果模型是院校影响因素理论模型的代表。三种模型中所包含的影响因素、影响路径和影响过程都对后续模型的建立以及院校研究分析产生影响。三种模型基于社会学视角对学生产出进行因果分析,具有研究动态过程、重视环境与学生互动、突出院校影响等特点。 相似文献
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M. Tim Mainhard Helena J.M. Pennings Theo Wubbels Mieke Brekelmans 《Teaching and Teacher Education》2012
This paper explores how State Space Grids (SSG), a dynamic systems research method, can be used to map teacher–student interactions from moment-to-moment and thereby to incorporate temporal aspects of interaction. Interactions in two secondary school classrooms are described in terms of level of interpersonal control and affiliation, and of variability and recurrent stable states (called “attractors”) of teacher–student interaction. Undesirable interactions appeared to feature weaker attractors and higher variability than more desirable interactions. SSGs appeared a promising way to study temporal aspects of classroom interaction, offering variability and attractors as indicators for the quality of classroom interaction. 相似文献
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王晟岚 《苏州教育学院学报》2007,24(4):114-116
"情景互动教学"以交际语言教学理论为依据,在课堂活动的组织和设计上突出情景性和交互性,利用各种形式的情景为教学互动搭建平台,使学生在交谈、交流和交际中学习语言,实现培养学生交际能力的教学目标。 相似文献
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网络课程的有效性是新一轮网络课程建设的焦点问题,而网络课程中交互的有效性会对使用者的学习积极性、学习效果等产生深远影响,因此网络课程中交互的有效性是网络课程建设的关键因素之一。探讨基于动态评价的网络交互的设计形式,以评价为交互活动,主要从信息交互的层面提出网络课程设计过程中可以参考的几种形式,旨在提高网络课程交互的有效性,使网络课程既能建好又能用好。 相似文献