Using data from the China Education Panel Survey,this study examines the impact of homework time on academic performance among Chinese junior high school students.The findings show that seventh and ninth graders spend...Using data from the China Education Panel Survey,this study examines the impact of homework time on academic performance among Chinese junior high school students.The findings show that seventh and ninth graders spend 2.28 and 2.67 hours daily on homework,respectively,exceeding the 90-minute limit stipulated by the"double reduction"policy.Homework time significantly varies by gender,grade,and region.The relationship between homework time and the academic performance of junior high school students follows an inverted U-shaped pattern.Ordinary Least Squares analysis indicates that the optimal homework time for maximizing academic performance is less than 0.96 hours per day.Beyond the threshold,the positive effect diminishes,and when homework time exceeds 4.07 hours,it negatively impacts academic performance.Mediating effect analysis shows that excessive homework time leads to negative emotions,such as boredom,unhappiness,frustration,and sadness while depriving students of necessary sleep for healthy growth.It is concluded that optimal daily homework time is about 1 hour,aligning with the"double reduction"policy guidelines.展开更多
INSITE(Integrated System for Information Technology and Engineering)软件是哈里伯顿公司支持其随钻测井服务的地面系统,其核心部分是一个庞大的开放式数据库(ODBC)连接的数据库系统。通过探索INSITE软件的隐藏功能,可以在广域网和...INSITE(Integrated System for Information Technology and Engineering)软件是哈里伯顿公司支持其随钻测井服务的地面系统,其核心部分是一个庞大的开放式数据库(ODBC)连接的数据库系统。通过探索INSITE软件的隐藏功能,可以在广域网和局域网内让全球INSITE工作站实时连接在一起,在任何地方都可以共享到这些数据库,从而实现24小时的实时监控,为现场作业提供强大的实时支持。主要介绍的随钻测井、测量相关模块的数据库原理。同时通过现场对隐藏功能的开发应用,实现现场作业难题的解决,减少因故障造成的经济损失。展开更多
基金study was supported by the Youth Program of the National Social Science Fund of China in Education,"Research on Labor Education Evaluation and Quality Improvement Mechanism in Primary andSecondarySchools"(No.CFA210249).
文摘Using data from the China Education Panel Survey,this study examines the impact of homework time on academic performance among Chinese junior high school students.The findings show that seventh and ninth graders spend 2.28 and 2.67 hours daily on homework,respectively,exceeding the 90-minute limit stipulated by the"double reduction"policy.Homework time significantly varies by gender,grade,and region.The relationship between homework time and the academic performance of junior high school students follows an inverted U-shaped pattern.Ordinary Least Squares analysis indicates that the optimal homework time for maximizing academic performance is less than 0.96 hours per day.Beyond the threshold,the positive effect diminishes,and when homework time exceeds 4.07 hours,it negatively impacts academic performance.Mediating effect analysis shows that excessive homework time leads to negative emotions,such as boredom,unhappiness,frustration,and sadness while depriving students of necessary sleep for healthy growth.It is concluded that optimal daily homework time is about 1 hour,aligning with the"double reduction"policy guidelines.
文摘INSITE(Integrated System for Information Technology and Engineering)软件是哈里伯顿公司支持其随钻测井服务的地面系统,其核心部分是一个庞大的开放式数据库(ODBC)连接的数据库系统。通过探索INSITE软件的隐藏功能,可以在广域网和局域网内让全球INSITE工作站实时连接在一起,在任何地方都可以共享到这些数据库,从而实现24小时的实时监控,为现场作业提供强大的实时支持。主要介绍的随钻测井、测量相关模块的数据库原理。同时通过现场对隐藏功能的开发应用,实现现场作业难题的解决,减少因故障造成的经济损失。
