Mixed Mode Latent Class Analysis: An Examination of Fit Index Performance for Classification

This Monte Carlo study examines the performance of fit indices commonly used by applied researchers interested in finite mixture modeling for the purposes of classification. Conditions for the simulation study were selected to reflect conditions found in applied educational and psychological research. The factors included in the investigation were metric level of indicators, sample size, and class prevalence. All models contained a combination of categorical and continuous indicators. All categorical indicators were dichotomous, and continuous indicators were normally distributed. The fit indices examined were Akaike’s information criterion, Bayesian information criterion (BIC), sample size-adjusted Bayesian information criterion (SSBIC), integrated classification likelihood criterion with Bayesian-type approximation, and Lo–Mendell–Rubin likelihood ratio test. Overall, SSBIC tended to identify the correct solution with higher frequency than other indices. BIC tended to identify the correct solution with higher frequency than the other indices in models with more continuous than categorical indicators, or when rare classes were absent.     

C语言程序设计课程实验教学综述

阐述了C语言的发展和演变,对C语言实验教学的各个方面进行了较为详细的探讨,旨在提高学生用C语言进行编程的能力,以便将来学有所用。     

Brokering dialogue between secondary students and teachers to co-construct appropriate pedagogy in reduced-size classes

This study focuses on how two teachers working in reduced-size secondary classes of the same grade adapted their pedagogy as a result of a brokered dialogue between myself as researcher and 43 grade 10 students from the teachers’ classes. Research was carried out over the course of one academic year. First, students’ perspectives on studying in a reduced-size class were elicited before they were invited to suggest ways of improving the teaching and learning. These interviews were transcribed and given to the teachers of these classes. Next, these teachers were interviewed to gauge their opinions on what the students had reported in the earlier interviews. At a later stage, their teaching was observed to determine whether, and to what extent, the two teachers had attempted to incorporate changes based on the feedback from pupils. The study showed that the pupil voice is a very powerful and constructive trigger for enacting teachers’ pedagogical change and developing our understanding of students’ learning processes. Findings demonstrate that teachers responded positively to their students’ perspectives despite initial apprehensions. Implications for professional development and good practices in reduced-size classes are also presented.     

The ‘art’ of creative teaching: implications for higher education

Richard Florida's The rise of the creative class (2002) delivered a strong wake-up call to higher education institutions worldwide. By linking creativity to technological innovation and economic prosperity, Florida argued that universities and colleges should nurture creativity in their students. But for many years, the higher education enterprise has been criticised for dampening creativity rather than fostering it. This paper explores the subversive nature of creativity, the value of creative teaching and proposes a number of strategies higher education should consider if they hope to graduate the future leaders of twenty-first century society.     

从知识框架建构谈《计算机组成原理》教学改革

从该课程学生难学、教师难教的现状分析开始,提出建立课程整体知识框架等教学内容改革措施,随后又分析了启发式、类比式教学方法在本课程中的应用,最后探讨了实验环节改革,分析了课程教学改革中的各种问题及相应解决方法.     

项羽与“布衣王侯之局”——兼论秦汉之际的社会阶层变动

西周世卿世禄制度在春秋战国之世逐渐被诸侯国实施的功勋授爵制度所取代,"封侯"成为社会各阶层的普遍愿望。秦国商鞅变法,所颁二十等爵制中多有以功勋授爵之爵级。反秦战争爆发后,陈胜以"黔首"自立为王,激起了社会各阶层对"封王"的渴望。随后项羽分封,不论出身,只论军功,自"西楚霸王"而下所封王、侯中多有平民,此即所谓"布衣王侯之局"。刘邦在与项羽的对抗过程中,因以弱敌强之形势所迫,不得不继续分封王、侯以争揽人才,韩信、彭越等遂以布衣封王。楚汉战争结束时,刘邦一方"布衣王侯之局"已成,受封王侯者治国理政,终开赵翼所谓"汉初布衣将相之局"。     

实验用大白鼠蛲虫感染状况调查

目的：了解某高校实验动物大自鼠蛲虫感染情况,为医学实验提供符合标准的实验动物。方法：按照国家标准《实验动物寄生虫学》检测方法,用粪便生理盐水涂片法检查。结果：共检测1月龄、2月龄大白鼠69只,其中感染蛲虫鼠17只,阳性率25％。结论：为确保实验动物质量,应定期对动物进行寄生虫学检测,以保障实验人员安全,保证实验的可信度、严谨性。     

敏感性陈述句研究的实证方法

目的：提出一种用眼动指标对敏感性陈述句加工进行研究的方法,以避免敏感性问题带来的负面效应。方法：先通过自编问卷提取典型的敏感性陈述句,再通过眼动仪获得相关兴趣区的眼动指标,然后根据这些指标比较相关区域的加工情况。结果：被试（n=208）社会道德观、政治态度和个人隐私等3个维度总分分别为：29.560±5.347,32.700±7.133,29.370±9.243,总分在三者之间差异具有统计学意义（F=13.222,P〈0.01）;在被试（n=40）筛选出的6个关键词中,对＂卖淫＂的注视时间最长（596.460±305.737 ms）,而相对注视时间（8.538±5.471）最短;对＂民主＂的注视时间最短（363.361±248.781 ms）,但相对注视时间（11.687±6.882）居中,因而不同敏感性词语加工之间的差异具有不同的特点。结论：提出的用眼动指标的方法能有效地检测出个体对相关内容的加工情况,为敏感性问题的统计和研究提供了依据。     

幼鼠膈肌损伤与漏斗胸发生的实验研究

目的：探讨幼鼠膈肌损伤后与漏斗胸（PE）发生的关系。方法：将40NSD大鼠分成2组,实验组造成人为膈肌损伤,对照组施以假手术,至鼠龄12周全部处死观察胸廓外观及膈肌组织学形态。结果：膈肌损伤后,动物PE发生率为38．89％（7／18）,实验组动物PE的发生率与对照组比较,差异有统计学意义。膈肌损伤后组织愈合结果为肌纤维结构松散、部分肌组织萎缩,纤维结缔组织增生,瘢痕形成。结论：膈肌损伤后瘢痕愈合引起膈肌挛缩,挛缩的膈肌持续牵拉前胸壁,牵拉力量是导致大鼠PE发生的主要因素之一。     

模拟电子技术实验教学改革实施与创新能力培养

大学生创新能力的培养是高校人才培养的核心,实验教学对于大学生创新能力和实践技能的培养起到至关重要的作用。以模拟电子技术实验教学改革为例,探讨了实验教学中教学硬件条件和教学内容的改革及其对于激发学生创新意识的积极指导作用。