The importance of teachers' emotions and instructional behavior for their students' emotions – An experience sampling analysis     

《Teaching and Teacher Education》2014

The present study focuses on the relationship between teachers' emotions, their instructional behavior, and students' emotions in class. 149 students (55% female, M age = 15.63 years) rated their teachers' emotions (joy, anger, anxiety) and instructional behavior, as well as their own emotions in an experience-sampling study across an average of 15 lessons in four different subject domains. Intraindividual, multilevel regression analyses revealed that perceived teachers' emotions and instructional behavior significantly predicted students' emotions. Results suggest that teachers' emotions are as important for students' emotions as teachers' instructional behavior. Theoretical implications for crossover theory and practical recommendations for teachers are discussed.  相似文献   

δ-方法在统计量渐近分布中的应用??     

周小双 《衡水学院学报》2013,(4)

δ-方法是概率论与数理统计教学中一极其重要的引理,在统计量渐近分布中用处十分广泛。本文主要通过实例说明了δ-方法在统计量极限分布中的应用。  相似文献   

如何讲好时域取样定理     

刘建宝  秦昕昕  欧阳华 《教育教学论坛》2013,(18)

时域取样定理是"信号与系统"和"数字信号处理"等课程的重要内容,但是,目前高等院校普遍使用的国内外经典教材对这部分内容论述不够清晰,没有证明连续时间信号与离散时间信号频谱的关系,尤其是引入了理想冲激取样过程,物理意义不明确,影响了学生理解。本文对时域取样定理进行了深入的思考,提出了两种讲解思路,教学实践表明,对增强学生对该内容的理解,提高授课质量,有较强的针对性。  相似文献   

电子期刊数据库用户满意群组实证研究     

李莉  卞佳 《情报科学》2008,26(2):229-232

电子期刊数据库如何通过个性化服务提高信息用户的满意水平,有赖于基于群体特征的、科学有效的信息用户分组.本文提出基于背景特征的信息用户群组划分假设,在此基础上设计调查方案组织抽样调查,运用因子分析、平均数检验与方差分析等方法验证了假设.研究结论显示基于性别、知识能力和数据库经验等背景特征的分组对于信息用户满意形成存在显著差异,为电子期刊数据库的管理决策提供了有益的借鉴.  相似文献   

脓疮草复合体的形态性状分析与分类修订     

赵一之  李素英  曹瑞  刘云波 《中国科学院研究生院学报》1998,36(3):193-205

 脓疮草复合体(Panzerina lanata complex)隶属于唇形科脓疮草属,原有6个合法学名。通过从内 蒙古、陕西、甘肃、宁夏及新疆等5个省或自治区的22个居群取样,进行野外和移栽后的对比观测及性 状分析,并结合多变量统计分析,从不同水平和角度对复合体进行了研究。结果表明,此复合体的根、茎   等都是环境可塑性很高的性状,叶次之,而花部、果实和种子性状的可塑性较小。以往划分复合体类群   的叶裂程度、茎叶被毛及萼齿形态等几个鉴别性状在天然居群中连续变化,以此划分的几个“种”,不过   是连续变异的极端个体。再结合地理分布的特征,将P．alaschanica、P．kansuensis和P. albescens归并   在P．1anata中,同样可证明P．argyracea不存在。对22个居群11个形态性状的统计学和主成分分析   与性状分析结果一致。研究表明,该复合体小坚果表面具疣与否、花冠超出萼筒的多少及花干后变色与   否等是其分种性状,以此分种标准该复合体可分为2种:Panzerina lanata(L．)Sojak和Panzerina  parviflora(C．Y．Wu et H．W．Li)Y．Z.Zhao．  相似文献   

优化上海研究生学位论文 随机抽检系统的探析   总被引：1，自引：1，他引：0       下载免费PDF全文

孟洁 《上海教育评估研究》2013,2(4):56-59

上海市研究生教育多年来坚持以学位论文作为质量监控主要抓手,开展博士、硕士学位 论文答辩前的随机抽检与“双盲”评议工作,不断促进研究生培养质量的提高。同时随机抽检结果也 用做检验高校质量保障体系运行和作用分析的依据。本文主要介绍项目的优化历程、理念演进,分 析项目的创新机制与成效,进而达到总结和推广的作用。  相似文献   

RGAN-EL: A GAN and ensemble learning-based hybrid approach for imbalanced data classification     

《Information processing & management》2023,60(2):103235

Imbalanced sample distribution is usually the main reason for the performance degradation of machine learning algorithms. Based on this, this study proposes a hybrid framework (RGAN-EL) combining generative adversarial networks and ensemble learning method to improve the classification performance of imbalanced data. Firstly, we propose a training sample selection strategy based on roulette wheel selection method to make GAN pay more attention to the class overlapping area when fitting the sample distribution. Secondly, we design two kinds of generator training loss, and propose a noise sample filtering method to improve the quality of generated samples. Then, minority class samples are oversampled using the improved RGAN to obtain a balanced training sample set. Finally, combined with the ensemble learning strategy, the final training and prediction are carried out. We conducted experiments on 41 real imbalanced data sets using two evaluation indexes: F1-score and AUC. Specifically, we compare RGAN-EL with six typical ensemble learning; RGAN is compared with three typical GAN models. The experimental results show that RGAN-EL is significantly better than the other six ensemble learning methods, and RGAN is greatly improved compared with three classical GAN models.  相似文献   

对于测线调查样本的生物分布密度推定的几种方法的比较研究     

熊国经  熊权 《江西教育学院学报》2004,25(6):6-9

用几种不同的密度推定法,对测线调查样本进行密度推定。使用的最佳带幅宽有的依赖于探知函数,有的不依赖探知函数,还用到经典的最大似然估计法。把5种密度推定法用于计算机模拟产生测线调查的距离数据,由统计量RRMSE和RB对推定值进行评价,来验证其优劣。  相似文献   

Science classroom activities and student situational engagement     

Inkinen Janna  Klager Christopher  Schneider Barbara  Juuti Kalle  Krajcik Joseph  Lavonen Jari 《International Journal of Science Education》2019,41(3):316-329

This study examines the association between student situational engagement and classroom activities in secondary school science classrooms in Finland and the U.S. Situational engagement is conceptualised as times when students feel that a task is interesting and challenging to them and that they have the skills to complete it (see Schneider et al., 2016. Investigating optimal learning moments in U.S. and Finnish science classes. Journal of Research in Science Teaching, 53(3), 400–421. doi:10.1002/tea.21306). Data on situational engagement and classroom activities were obtained using the experience sampling method (ESM) from 247 Finnish students in 13 secondary science classrooms and 281 U.S. students in 18 secondary science classrooms. In both samples, the students tended to be situationally engaged only a small proportion of the time during their science classes. However, the Finnish students were more likely than the U.S. students to report being situationally engaged. To investigate when the students were most likely to report being situationally engaged, hierarchical logistic regression models were employed, which suggested that some classroom activities were associated with higher levels of student situational engagement than others. The Finnish students were more likely to report being situationally engaged when calculating and presenting scientific information. In the U.S., the students were more likely to report being situationally engaged while discussing scientific information and less likely when listening to the teacher. The results suggest that situational engagement is momentary and associated with specific science classroom activities.  相似文献   

湖南电大开放教育试点毕业生追踪调查抽样设计     

黄新斌  戴金荣  王东江 《广东广播电视大学学报》2006,15(1):17-21

湖南电大开放教育试点专业毕业生追踪调查的抽样遵循随机性、分布相对均匀性、行业代表性等基本原则,采取分层等距抽样的方法。抽样根据湖南电大开放教育毕业生实际情况适当扩大了调查范围和抽样比例,确定的本专科专业抽样层数量扩大到24个,毕业生样本数扩大到1975个,用人单位样本数扩大到1342个,样本总数达到3317个,为较全面的掌握全省试点教育实施情况提供了信息支撑。  相似文献