交互模式下虚拟仿真教学的探索和研究--以“电器可靠性技术”课程为例     

李文华  王景芹  赵靖英 《教育教学论坛》2022,(11)

教学手段的发展和教学方法体系的丰富,是培养新时代高科技人才的必要途径。将虚拟仿真教学结合交互式教学模式,经过在“电器可靠性技术”课程中的实践,证明其具有很强的优越性。分析了交互式模式下虚拟仿真教学的构成要素,重点探索了其交互设置的合理性、教师引导的高效性、评价体系的全面性等理论基础,研究了其在课程实践中的核心优势和特征。交互式虚拟仿真教学模式的实现是电器可靠性学科实验教学的极大拓展,对“电器可靠性技术”课程教学质量的提高具有深远意义。  相似文献   

基于“白话统计”提升体育学研究生调查问卷信效度检验能力的创新与实践     

焉石  许水生  董宇  庞雪林 《体育科技文献通报》2022,(2)

本研究通过文献资料法、逻辑分析法、数理统计法等方法,对采用问卷调查研究的体育学硕士论文进行了分析。研究发现,在问卷效度检验中普遍过多注重专家效度,并简单笼统定性问卷效度好坏;在问卷信度检验中对类别变量、等级变量、连续变量的辨别不清,导致统计分析方法选择错误;在量表效度检验中缺乏收敛效度及区别效度的展示;在量表信度中针对克隆巴赫的内部一致性检验时,欠缺对“校正后的项总计相关性”和“各题项间的相关性”的综合判断。鉴于此,本研究结合体育专业学生的数理统计基础较弱的特点,以通俗易懂的表述形式,提出了针对性解决方案,同时规范了论文中需要呈现的表格形式,旨在提升体育学研究生的论文质量。  相似文献   

Assessing Quality in Early Childhood Education and Care     

Karin Ishimine  Collette Tayler 《European Journal of Education》2014,49(2):272-290

Evaluating quality in early childhood education and care (ECEC) service internationally is increasingly important. Research to date indicates that it is ‘high-quality’ programmes that boost and sustain children's achievement outcomes over time. There is also growing interest in the accountability of public funds used for ECEC programmes and the types of measures that assess ECEC quality. This article reviews eleven existing instruments that were designed to assess global ECEC programmes and examines them in terms of their strengths and weaknesses as quality measurement tools and the adequacy of the measures to sufficiently reflect the context and purposes of the assessment. Through this process the authors identify directions for the development of new measures that are both theoretically and psychometrically sound.  相似文献   

浙江省专升本《高等数学》试卷分析     

郭培俊 《温州职业技术学院学报》2014,14(3):24-28

为帮助教师高效指导学生和学生进行有效学习,收集近几年试卷,对其涵盖内容、标准分、题型与相对应年份的考试大纲进行比较,结果表明,浙江省专升本《高等数学》具有不变性和变异性.采用2013年试卷进行模拟测试得出,试卷偏难、可信度高、区分度好,成绩服从正态分布.为此,建议专升本相关管理部门兼顾高职高专办学特点和学生实情,避免出偏题、怪题、难题,尤其要降低证明题难度,增加区分度.  相似文献   

Rubrics for developing students’ professional judgement: A study of sustainable assessment in arts education     

《Studies in Educational Evaluation》2018

The participation of students in assessment is known to generate higher-order learning outcomes. This study aims to determine the usefulness of rubrics in aiding the incorporation of undergraduate students into assessor teams for developing their professional judgement. A quasi-experimental study examined the effects of a brief training programme on the use of rubrics, and of the participation of students in rubric creation and moderation discussions. We calculated Cronbach’s alphas, and intraclass correlation coefficients in order to examine the intra- and inter-rater reliability between all the members of the assessor teams. The results demonstrate that only participation in the rubric design and in the moderation discussions regulating their use helped undergraduate students to develop sound assessment skills. We infer that rubrics can help to promote professional judgement if they are conceived as instructional resources for defining and supporting the processes of negotiation and agreement that characterize an assessment culture.  相似文献   

A social recommendation method based on an adaptive neighbor selection mechanism     

Sajad Ahmadian  Majid Meghdadi  Mohsen Afsharchi 《Information processing & management》2018,54(4):707-725

Recommender systems are techniques to make personalized recommendations of items to users. In e-commerce sites and online sharing communities, providing high quality recommendations is an important issue which can help the users to make effective decisions to select a set of items. Collaborative filtering is an important type of the recommender systems that produces user specific recommendations of the items based on the patterns of ratings or usage (e.g. purchases). However, the quality of predicted ratings and neighbor selection for the users are important problems in the recommender systems. Selecting suitable neighbors set for the users leads to improve the accuracy of ratings prediction in recommendation process. In this paper, a novel social recommendation method is proposed which is based on an adaptive neighbor selection mechanism. In the proposed method first of all, initial neighbors set of the users is calculated using clustering algorithm. In this step, the combination of historical ratings and social information between the users are used to form initial neighbors set for the users. Then, these neighbor sets are used to predict initial ratings of the unseen items. Moreover, the quality of the initial predicted ratings is evaluated using a reliability measure which is based on the historical ratings and social information between the users. Then, a confidence model is proposed to remove useless users from the initial neighbors of the users and form a new adapted neighbors set for the users. Finally, new ratings of the unseen items are predicted using the new adapted neighbors set of the users and the $top\_N$ interested items are recommended to the active user. Experimental results on three real-world datasets show that the proposed method significantly outperforms several state-of-the-art recommendation methods.  相似文献   

Knowledge dissemination in clinical trials: Exploring influences of institutional support and type of innovation on selective reporting     

Rossella Salandra 《Research Policy》2018,47(7):1215-1228

This paper contributes to the ongoing debate on the reliability of published research. In particular, this study focuses on the selective reporting of research findings in clinical trials, defined as the publication of only part of the findings originally recorded during a research study, on the basis of the results. Selective reporting can lead to concerns ranging from publishing flawed scientific knowledge, to skewing medical evidence, to wasting time and resources invested in the conduct of research. Drawing upon a unique hand-collected dataset, this study investigates the contextual factors associated with selective reporting. Using ‘risk of bias’ ratings assessed based on expert judgment and presented in systematic reviews of clinical literature, this study explores whether selective reporting is associated with: (1) the source of institutional support; and, (2) the type of innovation evaluated. The results indicate that the odds of selective reporting are higher for industry-funded studies than for publicly-funded studies; however, this effect is restricted to studies where at least one author is industry-affiliated. In addition, the results suggest that selective reporting is more likely in projects exploring radical innovation, compared to those investigating incremental innovation.  相似文献   

两状态流约束通讯网络可靠度的一个组合路算法     

刘兵 《鞍山师范学院学报》1999,(1)

提出了两状态流约束通讯网络可靠度计算的一个组合路算法 ,算法在 S.Rai和 S.Soh[6] 的 CPE算法基础上 ,重新将极小路分类 ,定义了新的路的组合规则 ,减少了组合路数 .  相似文献   

复杂装备供应链确信可靠性评价与优化研究     

王振肖  党炜  李自豪 《科技管理研究》2021,41(9):174-183

基于复杂装备研制特征,提出一种基于确信可靠性理论的复杂装备供应链可靠性评价方法.从供货质量可靠性、产品交付可靠性和研制成本可靠性三个维度建立成员企业可靠性评价指标,分别基于概率测度和不确定测度构建通用零部件供应商和新研零部件供应商的确信可靠性评价模型.通过计算累积可靠性消除新研零部件供应商可靠性之间的相互影响,并利用系统结构函数给出了供应链整体确信可靠性评价方法.结合成本目标建立复杂装备供应链可靠性优化模型.以简化的飞机研制供应链为例进行应用分析.为复杂装备供应链可靠性评价与优化提供理论支持.  相似文献   

浅谈计算机网络可靠性优化设计   总被引：4，自引：0，他引：4  

邓志平 《科技广场》2010,(1):59-60

由于信息网络、输电网络、集成电路网络、交通网络等网络广泛存在于现实世界,它们的正常运行与否不仅影响着普通大众的生活,也影响着一个国家的社会安全、经济发展等问题。因此,网络可靠性问题不但是网络开发者和运营者关心的问题,更是学者们一直关注的课题。所以,对计算机网络的可靠性进行分析和设计具有重要的理论和实际意义。  相似文献