国家教育数字化战略转型带动了智慧课堂交互行为数据大规模、系统化的采集,当前在采集的数据基础上所进行的分析依据是统计性的经验性分析方法。如何根据课堂交互行为数据建立标准分数常模,并对相关维度数据进行分级应用,是目前国家教...国家教育数字化战略转型带动了智慧课堂交互行为数据大规模、系统化的采集,当前在采集的数据基础上所进行的分析依据是统计性的经验性分析方法。如何根据课堂交互行为数据建立标准分数常模,并对相关维度数据进行分级应用,是目前国家教育数字化亟待探索的数据驱动智慧课堂交互分析方法。为此,从课堂交互行为数据基础出发,基于改进型弗兰德斯互动分析系统(iFIAS),选取iFIAS系统平台的358节有效课堂和292380条有效数据,形成了课堂交互行为分析标准分数常模的计算方法,并构建了“1个总体,4个主维度,14个子维度”的标准分数常模分级应用框架,得出iFIAS课堂交互行为数据标准分数常模计算结果。最后,应用该方法对一堂小学四年级数学课“认识三角形和四边形”和一堂初中一年级英语课“Do You Think You Will Have Your Own Robot?”进行课堂交互行为量化分析,通过比较发现数据驱动的智慧课堂的特点及其内在关联,并从“标准分数常模、三值内在逻辑关系、课堂特点、无学科限定、常模漂移”五个方面讨论了常模分析结果。展开更多
The production of Bc and B＊ mesons at a Z-factory （an e＋e- collider operating at energies around the Z pole） is calculated up to the next-to-leading order （NLO） QCD accuracy. The results show that the dependence...The production of Bc and B＊ mesons at a Z-factory （an e＋e- collider operating at energies around the Z pole） is calculated up to the next-to-leading order （NLO） QCD accuracy. The results show that the dependence of the total cross sections on the renormalization scale/1 is suppressed by the corrections, and the NLO corrections enhance the total cross sections of B,. by 52% and of Bc＊ by 33% when the renormalization scale is taken at μ = 2mb. To observe the various behaviors of the production of the mesons Bc and Bc＊, such as the differential cross section vs. the out-going angle, the forward-backward asymmetry, and the distribution vs. the energy fraction z up to NLO QCD accuracy as well as the relevant K-factor （NLO to LO） for the production, are calculated, and it is pointed out that some of the observables obtained in the present work may be used as a specific precision test of the standard model.展开更多
文摘国家教育数字化战略转型带动了智慧课堂交互行为数据大规模、系统化的采集,当前在采集的数据基础上所进行的分析依据是统计性的经验性分析方法。如何根据课堂交互行为数据建立标准分数常模,并对相关维度数据进行分级应用,是目前国家教育数字化亟待探索的数据驱动智慧课堂交互分析方法。为此,从课堂交互行为数据基础出发,基于改进型弗兰德斯互动分析系统(iFIAS),选取iFIAS系统平台的358节有效课堂和292380条有效数据,形成了课堂交互行为分析标准分数常模的计算方法,并构建了“1个总体,4个主维度,14个子维度”的标准分数常模分级应用框架,得出iFIAS课堂交互行为数据标准分数常模计算结果。最后,应用该方法对一堂小学四年级数学课“认识三角形和四边形”和一堂初中一年级英语课“Do You Think You Will Have Your Own Robot?”进行课堂交互行为量化分析,通过比较发现数据驱动的智慧课堂的特点及其内在关联,并从“标准分数常模、三值内在逻辑关系、课堂特点、无学科限定、常模漂移”五个方面讨论了常模分析结果。
基金supported by the National Natural Science Foundation of China(Grant Nos.11275243,11275036,11447601,11535002,and 11675239)
文摘The production of Bc and B＊ mesons at a Z-factory （an e＋e- collider operating at energies around the Z pole） is calculated up to the next-to-leading order （NLO） QCD accuracy. The results show that the dependence of the total cross sections on the renormalization scale/1 is suppressed by the corrections, and the NLO corrections enhance the total cross sections of B,. by 52% and of Bc＊ by 33% when the renormalization scale is taken at μ = 2mb. To observe the various behaviors of the production of the mesons Bc and Bc＊, such as the differential cross section vs. the out-going angle, the forward-backward asymmetry, and the distribution vs. the energy fraction z up to NLO QCD accuracy as well as the relevant K-factor （NLO to LO） for the production, are calculated, and it is pointed out that some of the observables obtained in the present work may be used as a specific precision test of the standard model.
