DEBYE TEMPERATURE AND VALENCE ELECTRON STRUCTURE IN INTERMETALLIC TiAl

The Debye temperature 0D of intermetallic compound TiAl at room temperature was determined by means of X-ray diffraction.The experiments show that the Debye temperature of TiAl is 515 K,which is obviously higher than that of Al(394 K)or Ti(380 K).The experimental results indicate that the bonding in the intermetallic compound TiAl is stronger than that in pure metal Ti or Al which is in good agravement with the calculation of its valence electron structures.The relationship between the Debye temperature of TiAl and its brittle-ductile transition temperature is also dealt with in the paper.

医学生学习沉浸体验与影响因素分析

目的探寻医学生的学习沉浸体验现状及其特点,分析医学生学习沉浸体验的影响因素。方法采用分层随机抽样的方法,应用医学生学习沉浸体验问卷对某高校全日制在校732名医学生进行问卷调查。采用Epidata 3.1软件对数据进行双次录入和管理,SPSS 19.0统计软件进行数据处理和统计分析。应用内部一致性信度检验检验问卷有效性、logistic回归分析测量医学生学习沉浸体验的影响因素。结果医学生学习沉浸体验处于中等水平(3.13±0.64)。成绩水平(OR=1.177,95%CI=0.988~1.402)、学习满意度(OR=1.674,95%CI=1.341~2.089)和专业兴趣度(OR=2.153,95%CI=1.776~2.610)是学习沉浸的正向影响因素(P<0.05),与学习沉浸体验呈正相关。年级、生源地、职务、学习压力、学校满意度、生活满意度对学习沉浸体验无影响(P>0.05)。结论医学生沉浸体验处于中等水平。提高医学生成绩水平、学习满意度和专业兴趣度有利于提高医学生沉浸体验;加强医学生工作沉浸的关注、增强医学生学习沉浸体验有利于医学生教育,有利于培养合格医学人才。