Lezuo dance is one of the most widely distributed and popular dances in the southern Yi people area of Yunnan. After a long period of development, it gradually extended to religious sacrifices,funeral rites and young people’s marriage and love life. There are three styles of Lezuo dance,such as hongyuan style,shie style,milustyle. Although each of the three styles has its own characteristics, it is consistent with the basic elements, such as the circle, the clapping, the three-step rhythm, and so on. These dances reproduce the living scenes of the ancestors’ crop production, faith practice and marriage and life,and highlight the general characteristics of simplicity, stability and external flexibility. At the same time, it also highlights the flexibility of the lower body, steady and not rigid, flexible and not impetuous movement characteristics. Finally, dance in the form of a circle and dance, which is a symbol of a nation’s longing for unity and harmony and a better life.
基于OBE教育理念,结合贵州工程应用技术学院"12224"应用型人才培养模式及《贵州工程应用技术学院课程考核管理办法》的要求,围绕学生中心,以课程目标为导向,根据课程内循环流程构建了"三化一式一坊"的课程改革模式,并以贵州工程应用技术学院电子信息类专业为例,在单片机及接口技术课程教学中进行了有益的探索和实践.
热工学是机械、热能类专业普遍开设的专业基础课,教学过程存在理论性强、公式多、课时受压缩等困难.基于32个总学时,分别按照"强化理论基础、突出主要应用、保持框架完整"的思路和"基本概念→基本理论→基本性质→基本应用"的认知逻辑,对热工学国家级精品教材内容进行取舍和模块化编排;基于OBE教学理念设计教学目标、支撑指标及权重,建立教学目标和支撑指标的矩阵关系;利用超星学习通平台完成模块化教学内容线上建设,构建"设计→运行→监督"全程线上闭环考核管理模式,实现了理论基础与工程实践教学内容的有效衔接,明晰了教学成效基本评价体系,保障了过程考核透明化和客观性.
MgH2因具有高达7.6wt%的理论氢容量而被认为是一种很有前景的储氢材料,但其较差的动力学和热力学性能,限制了其实际应用.在MgH2中加入催化剂是改善其吸放氢动力学的有效策略.利用机械球磨法制备Mg-xwt%石墨烯(x=0,1,2,3,5)复合储氢材料,采用XRD、SEM、TG-DSC和PCT对复合材料的物相组成、形貌结构和储氢性能进行了研究.结果表明:随石墨烯含量的增加,Mg/MgH2储氢性能呈先增大后减小趋势.当石墨烯的含量达到2wt%时,Mg-2wt%G复合材料具有最佳的吸放氢性能、更快的吸放氢速率和更低的放氢温度;在350℃,300min下Mg-2wt%G吸氢量达4.07wt%,相同温度下,400min内放氢量为3.82wt%;放氢峰值温度较未添加石墨烯降低了11.4℃.
利用COMSOL仿真软件分别模拟不同形状介质柱的二维三角晶格的折射率之比、占空比、几何尺寸及周期等因素对光子带隙位置和宽度的影响.模拟结果发现:当圆形介质柱半径为70nm,占空比为0.25,背景材料折射率为1.6,介质柱折射率为1.92,且折射率虚部为0.05,其他形状介质柱的面积和填充率与圆形介质柱的相同,占空比、折射率也与圆柱形相同时,可得到蓝光成分减少的透射光谱,并将其光谱与AM1.5标准太阳光谱进行相似度对比,发现与AM1.5标准太阳光谱非常接近.所得结论在光子晶体LED光谱调节、滤波、提高发光效率等方面有一定的理论参考价值.
