目的:探讨混合学习环境下小组合作学习模式在《心理与精神护理》课程中的作用。方法:采用方便抽样法抽取2020级高职护理专业两个班100名学生,分为实验组和对照组。对照组采用面对面课堂讲授为主、线上教学为辅的多媒体教学;实验组采用...目的:探讨混合学习环境下小组合作学习模式在《心理与精神护理》课程中的作用。方法:采用方便抽样法抽取2020级高职护理专业两个班100名学生,分为实验组和对照组。对照组采用面对面课堂讲授为主、线上教学为辅的多媒体教学;实验组采用混合学习环境下小组合作学习模式,包括重组课前+课中+课后任务顺序、案例情景模拟与学生自拍微视频展示等。干预后比较两组教学效果。结果:实验组线上成绩(88.80±8.64 VS 83.10±13.32)、实践考核成绩(85.92±4.61 VS 82.88±2.77)和期末考试成绩(86.98±6.76 VS 83.14±7.48)明显高于对照组(P<0.05)。教学满意度调查显示,实验组总分明显高于对照组(40.62±2.78 VS 36.14±3.14,P<0.01)。实验组临床推理与反思能力评分均明显高于对照组(P<0.05)。结论:混合学习环境下小组合作学习模式能提高线上线下教学效果,促进知识的内化吸收与学以致用,提高学生综合素养。展开更多
In this work,a bright and dark concentric-ring pattern is reported in a dielectric barrier discharge for the first time.The spatiotemporal dynamics of the bright and dark concentric-ring pattern are investigated with ...In this work,a bright and dark concentric-ring pattern is reported in a dielectric barrier discharge for the first time.The spatiotemporal dynamics of the bright and dark concentric-ring pattern are investigated with an intensified charge-coupled device and photomultiplier tubes.The results indicate that the bright and dark concentric-ring pattern is composed of three concentric-ring sublattices.These are bright concentric-ring structures,dark concentric-ring structures and wider concentric-ring structures,respectively.The bright concentric-ring structures and dark concentricring structures are alternately distributed.The bright concentric-ring structures are located at the centre of the wider concentric-ring structures.The wider concentric-ring structures first form from the outer edge and gradually develop to the centre.The essence of all three concentric-ring structures is the individual discharge filaments.The optical emission spectra of different sublattices are acquired and analysed.It is found that the plasma parameters of the three concentricring sublattices are different.Finally,the formation mechanism of the bright and dark concentricring pattern is discussed.展开更多
介质阻挡放电(DBD)实验中观察到了旋转同心圆环斑图。为研究斑图中点的运动状态与DBD参数之间的关系,采用高速录像机短曝光拍照、发射光谱分析及理论模拟等方法研究了DBD放电的旋转同心圆环斑图。斑图由中心点、内圈圆环点和外圈圆环点...介质阻挡放电(DBD)实验中观察到了旋转同心圆环斑图。为研究斑图中点的运动状态与DBD参数之间的关系,采用高速录像机短曝光拍照、发射光谱分析及理论模拟等方法研究了DBD放电的旋转同心圆环斑图。斑图由中心点、内圈圆环点和外圈圆环点组成;内外圈圆环上的点均旋转,但具有不同的速度;随着压强的升高,各点旋转速度增大。高速录像机以1个周期为曝光时间拍摄的照片显示,发现每个点均由明亮的体放电和丝状的沿面放电组成。发射光谱分析显示:随着气体压强从30 k Pa增大到50 k Pa时,旋转同心圆环中心点、内圈圆环点和外圈圆环点处的分子振动温度、电子平均能量均降低,而电子密度均增高。通过对旋转同心圆环斑图中体放电电流积分,结合着光谱测量的电子密度,模拟了旋转同心圆环斑图中体放电产生的壁电荷的电势,结果表明沿面放电对放电丝的旋转速度有重要影响。展开更多
文摘目的:探讨混合学习环境下小组合作学习模式在《心理与精神护理》课程中的作用。方法:采用方便抽样法抽取2020级高职护理专业两个班100名学生,分为实验组和对照组。对照组采用面对面课堂讲授为主、线上教学为辅的多媒体教学;实验组采用混合学习环境下小组合作学习模式,包括重组课前+课中+课后任务顺序、案例情景模拟与学生自拍微视频展示等。干预后比较两组教学效果。结果:实验组线上成绩(88.80±8.64 VS 83.10±13.32)、实践考核成绩(85.92±4.61 VS 82.88±2.77)和期末考试成绩(86.98±6.76 VS 83.14±7.48)明显高于对照组(P<0.05)。教学满意度调查显示,实验组总分明显高于对照组(40.62±2.78 VS 36.14±3.14,P<0.01)。实验组临床推理与反思能力评分均明显高于对照组(P<0.05)。结论:混合学习环境下小组合作学习模式能提高线上线下教学效果,促进知识的内化吸收与学以致用,提高学生综合素养。
基金supported by National Natural Science Foundation of China(No.12075075)the Natural Science Foundation of Hebei Province,China(Nos.2020201016,A2018201154,A2023201012)Scientific Research and Innovation Team of Hebei University(No.IT2023B03)。
文摘In this work,a bright and dark concentric-ring pattern is reported in a dielectric barrier discharge for the first time.The spatiotemporal dynamics of the bright and dark concentric-ring pattern are investigated with an intensified charge-coupled device and photomultiplier tubes.The results indicate that the bright and dark concentric-ring pattern is composed of three concentric-ring sublattices.These are bright concentric-ring structures,dark concentric-ring structures and wider concentric-ring structures,respectively.The bright concentric-ring structures and dark concentricring structures are alternately distributed.The bright concentric-ring structures are located at the centre of the wider concentric-ring structures.The wider concentric-ring structures first form from the outer edge and gradually develop to the centre.The essence of all three concentric-ring structures is the individual discharge filaments.The optical emission spectra of different sublattices are acquired and analysed.It is found that the plasma parameters of the three concentricring sublattices are different.Finally,the formation mechanism of the bright and dark concentricring pattern is discussed.
文摘介质阻挡放电(DBD)实验中观察到了旋转同心圆环斑图。为研究斑图中点的运动状态与DBD参数之间的关系,采用高速录像机短曝光拍照、发射光谱分析及理论模拟等方法研究了DBD放电的旋转同心圆环斑图。斑图由中心点、内圈圆环点和外圈圆环点组成;内外圈圆环上的点均旋转,但具有不同的速度;随着压强的升高,各点旋转速度增大。高速录像机以1个周期为曝光时间拍摄的照片显示,发现每个点均由明亮的体放电和丝状的沿面放电组成。发射光谱分析显示:随着气体压强从30 k Pa增大到50 k Pa时,旋转同心圆环中心点、内圈圆环点和外圈圆环点处的分子振动温度、电子平均能量均降低,而电子密度均增高。通过对旋转同心圆环斑图中体放电电流积分,结合着光谱测量的电子密度,模拟了旋转同心圆环斑图中体放电产生的壁电荷的电势,结果表明沿面放电对放电丝的旋转速度有重要影响。
