Game-based learning supported by mobile intelligence technology has promoted the renewal of teaching and learning models. Herein, a model of Question-Observation-Doing-Explanation (QODE) based on smart phones was constructed and applied to science learning during school disruption in COVID-19 pandemic. In this study, from the theoretical perspective of cognitive-affective theory of learning with media, Bandura’s motivation theory and community of inquiry model, self-report measure was used to verify the effect of students’ scientific self-efficacy and cognitive anxiety on science engagement. A total of 357 valid questionnaires were used for structural equation model research. The results indicated that two types of scientific self-efficacy, as indicated by scientific learning ability and scientific learning behavior, were negatively associated with cognitive anxiety. In addition, cognitive anxiety was also negatively correlated to four types of science engagement, as indicated by cognitive engagement, emotional engagement, behavioral engagement, and social engagement through smartphone interactions. These findings provide further evidence for game-based learning promoted by smart phones, contributing to a deeper understanding of the associations between scientific self-efficacy, cognitive anxiety, and science engagement. This study points out that the QODE model is suitable for implementing smart mobile devices to students’ science learning.
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Yang Xiantong Zhang Mengmeng Kong Lingqiang Wang Qiang Hong Jon-Chao 《Journal of Science Education and Technology》2021,30(3):380-393
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黄贤通 《赣南师范学院学报》2012,(6):13-15
提出并求解了有限域中的一类逆二次特征问题,进而设计了一类新的HILL密码体系(GFQIEP-HILL),数值实验说明了该密码体系的可行性.该密码体制动态构造密钥矩阵,增强了通信的安全性、不可抵赖性和不可伪造性,能适应现代密码体制的需求. 相似文献
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提出p-共轭矩阵概念,研究其性质且运用于密钥交换协议的设计,给出了数值算例,验证了所给协议的可行性. 相似文献
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黄贤通 《赣南师范学院学报》2013,(6):51-53
基于整数有限域矩阵方程的唯一求解问题,结合能实现秘密共享的Diffie-Hellman协议,设计了两类新密码体系,数值实验验证了新密码体系的可行性和正确性. 相似文献
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Wanghuai Xu Xiaofeng Zhou Chonglei Hao Huanxi Zheng Yuan Liu Xiantong Yan Zhengbao Yang Michael Leung Xiao Cheng Zeng Ronald X Xu Zuankai Wang 《国家科学评论(英文版)》2019,6(3):540
Energy harvesting devices that prosper in harsh environments are highly demanded in a wide range of applications ranging from wearable and biomedical devices to self-powered and intelligent systems. Particularly, over the past several years, the innovation of triboelectric nanogenerators (TENGs) that efficiently convert ambient kinetic energy of water droplets or wave power to electricity has received growing attention. One of the main bottlenecks for the practical implications of such devices originates from the fast degradation of the physiochemical properties of interfacial materials under harsh environments. To overcome these challenges, here we report the design of a novel slippery lubricant-impregnated porous surface (SLIPS) based TENG, referred to as SLIPS-TENG, which exhibits many distinctive advantages over conventional design including optical transparency, configurability, self-cleaning, flexibility, and power generation stability, in a wide range of working environments. Unexpectedly, the slippery and configurable lubricant layer not only serves as a unique substrate for liquid/droplet transport and optical transmission, but also for efficient charge transfer. Moreover, we show that there exists a critical thickness in the liquid layer, below which the triboelectric effect is almost identical to that without the presence of such a liquid film. Such an intriguing charge transparency behavior is reminiscent of the wetting transparency and van der Waals potential transparency of graphene previously reported, though the fundamental mechanism remains to be elucidated. We envision that the marriage of these two seemingly totally different arenas (SLIPS and TENG) provides a paradigm shift in the design of robust and versatile energy devices that can be used as a clean and longer-lifetime alternative in various working environments. 相似文献
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单片机教学中由于课程内容多、理论抽象、实践性强,教师难教、学生难学一直是该课程存在的难题。将Proteus与Keil应用于教学,不失为一种先进的教学手段和方法,也是课程教学改革的发展方向。 相似文献
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Instructional Science - Training researchers represents a substantially deeply international activity for higher education, and yet the transition into independence, a critical aim of doctoral... 相似文献
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物流管理专业实训模式及实训平台的构建 总被引：4，自引：0，他引：4
陈显通 《重庆广播电视大学学报》2007,19(2):18-19
实践教学是高校培养适用型、创新型人才的一个关键教学环节.在对国内外高校专业实训教学考察基础上,我们认为物流管理专业的实训教学应以校企合作为主,校内模拟实训为辅,从基本技能-综合技能-创新能力三个层次培养学生的职业技能. 相似文献
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监测与控制钉螺生长区域,对有效控制血吸虫病疫情的传播和蔓延作用十分重要.采用数字图像识别技术,可以高效地实现对钉螺生长区域的监控.面对杂乱、图像部分遮挡、光照变化等复杂背景下的钉螺数字图像识别,提出了解决方案:首先,提取钉螺数字图像的SIFT特征向量集;然后,应用K均值聚类获取更具代表性的特征子集,作为分类器的训练样本集;最后,通过支持向量机方法获得分类器,用于识别钉螺数字图像.实验结果表明,提出的方法能够获得较好的识别效果. 相似文献
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研究一类四网孔电路,从四网孔电路的电压、电流以及电荷三个方面进行分析,得到一类二阶常微分方程组,联系矩阵特征值的性质,讨论该方程组的解的结构和解的表达式,然后运用二次特征问题进行四网孔电路的设计和分析. 相似文献
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