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Canadian children’s and youth’s adherence to the 24-h movement guidelines during the COVID-19 pandemic: A decision tree analysis 被引量:6
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作者 Michelle D.Guerrero Leigh M.Vanderloo +3 位作者 Ryan E.Rhodes Guy Faulkner Sarah A.Moore Mark S.Tremblay 《Journal of Sport and Health Science》 SCIE 2020年第4期313-321,共9页
Purpose:The purpose of this study was to use decision tree modeling to generate profiles of children and youth who were more and less likely to meet the Canadian 24-h movement guidelines during the coronavirus disease... Purpose:The purpose of this study was to use decision tree modeling to generate profiles of children and youth who were more and less likely to meet the Canadian 24-h movement guidelines during the coronavirus disease-2019(COVID-19)outbreak.Methods:Data for this study were from a nationally representative sample of 1472 Canadian parents(Meanage=45.12,SD=7.55)of children(511 years old)or youth(1217 years old).Data were collected in April 2020 via an online survey.Survey items assessed demographic,behavioral,social,micro-environmental,and macro-environmental characteristics.Four decision trees of adherence and non-adherence to all movement recommendations combined and each individual movement recommendation(physical activity(PA),screen time,and sleep)were generated.Results:Results revealed specific combinations of adherence and non-adherence characteristics.Characteristics associated with adherence to the recommendation(s)included high parental perceived capability to restrict screen time,annual household income ofCAD 100,000,increases in children’s and youth’s outdoor PA/sport since the COVID-19 outbreak began,being a boy,having parents younger than 43 years old,and small increases in children’s and youth’s sleep duration since the COVID-19 outbreak began.Characteristics associated with non-adherence to the recommendation(s)included low parental perceived capability to restrict screen time,youth aged 1217 years,decreases in children’s and youth’s outdoor PA/sport since the COVID-19 outbreak began,primary residences located in all provinces except Quebec,low parental perceived capability to support children’s and youth’s sleep and PA,and annual household income ofCAD 99,999.Conclusion:Our results show that specific characteristics interact to contribute to(non)adherence to the movement behavior recommendations.Results highlight the importance of targeting parents’perceived capability for the promotion of children’s and youth’s movement behaviors during challenging times of the COVID-19 pandemic,paying particular attention to enhancing parental perceived capability to restrict screen time. 展开更多
关键词 Decision tree analysis Parental perceived capability physical activity Screen time Sleep
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莱州市近岸海域水动力状况分析与海洋环境的合理利用 被引量:1
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作者 赵可胜 王学昌 孙长青 《中国海洋大学学报(自然科学版)》 CAS CSCD 1994年第S1期27-33,共7页
建立莱州市近岸海域潮流数值模型,并在此基础上建立了拉格朗日余流模型。结合在主要入海排污口进行的数值跟踪,对莱州市近岸海域的物理自净能力进行了分析。并对海洋环境的合理利用进行了探讨。
关键词 莱州市 近岸海域 拉格朗日余流模型 自净能力 水动力分析 海洋环境
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大学物理习题教学中物理思维能力培养的现状分析及对策 被引量:2
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作者 熊钢 《咸宁学院学报》 2003年第6期96-97,共2页
大学物理习题教学对物理思维能力的培养有独特作用 ,然而由于多方面的原因 ,这一功能未能充分发挥 .
关键词 大学物理习题教学 物理思维能力 培养 分析 对策
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在研火炮的防腐蚀能力评价 被引量:1
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作者 苗建松 晋文虎 +3 位作者 陈燕 张利军 王锁忠 贾玉峰 《新技术新工艺》 2020年第9期58-62,共5页
从腐蚀与服役环境的关系入手,介绍了腐蚀的定义及类型,着重阐述了磨损腐蚀和应力腐蚀断裂,提出火炮的腐蚀分析与防腐蚀能力评价。通过必要性分析,阐述了对在研火炮进行防腐蚀能力评价的目的。通过对防腐蚀试验的3种方法——现场试验、... 从腐蚀与服役环境的关系入手,介绍了腐蚀的定义及类型,着重阐述了磨损腐蚀和应力腐蚀断裂,提出火炮的腐蚀分析与防腐蚀能力评价。通过必要性分析,阐述了对在研火炮进行防腐蚀能力评价的目的。通过对防腐蚀试验的3种方法——现场试验、实验室试验和实物试验的对比分析,阐明了现场实物试验是在研火炮防腐蚀能力的根本试验方法。介绍了火炮在全寿命周期各个阶段的防腐蚀工程重点,并阐述了防腐蚀能力评价报告的形成。以实例分析的方式对某型车载榴弹炮环境适应性试验及评价进行了总结,最后,探讨了提高火炮防腐蚀能力的途径。 展开更多
关键词 火炮 服役环境 腐蚀分析 防腐蚀能力 现场实物试验 环境适应性评价
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