关于《线性代数》教材中一定理证明的质疑

对一些《线性代数》教材中关于“方阵的不同特征值对应的特征向量组成的向量组线性无关”的定理的证明过程提出了一些质疑,并给出了2种不同的证明方法.     

单摆的研究性教学

大学教学向学生传递科学思想,培养学生科学素养.以单摆研究性教学为例,分析了单摆摆角、摆线伸长量、介质阻尼、密度等与周期的关系以及单摆的非线性等问题.通过对单摆教学内容的拓展,使学生体验发现问题、解决问题的＂研究＂过程,为将来从事科学研究奠定基础.     

教学交往的溯源与实践条件

教学交往关注学生的主体意识,通过交流、合作与自我对话,使学生能动地接受知识和经验之时,培养完善、健康的人格主体,以达成教学效果的有效实现.教学交往源于哲学诠释的拓深、学习理论的突破与对教学本质认识的逼近,并以"共享主义"为前提,受交往主体文化背景、价值观与世界观的制约.教学交往的实践有赖于教学交往环境的创设、言语条件的保障和教师不断地自我超越.     

“留守经历”大学生积极心理品质的质性研究

通过质性研究探讨有"留守经历"大学生的积极心理品质,结果发现,"留守经历"大学生的积极品质包括以下8个维度或主题:接受现实、成就动机、目标定向、意志坚强、积极乐观、善于学习、情绪调控、社会支持。     

地方综合性大学师资国际化的对策

在区域性经济发展、外向型经济的推动下,各地方综合性大学纷纷制定了国际化的发展战略。输送适应地方经济发展的创新型人才的目标对地方综合性大学的师资提出了更高的要求。为了达到这一目标,地方综合性大学的师资国际化发展变得刻不容缓。但地方综合性大学的师资国际化还存在诸多不足,需要地方政府、地方综合性大学以及教师齐心协力,共谋发展大计。     

管窥秦汉法律的家族特征——兼评《秦汉家族犯罪研究》

贾丽英博士的专著《秦汉家族犯罪研究》是研究秦汉家族犯罪问题的基础之作。著述对家族、家族犯罪等概念进行了科学的定义与界定,并将秦汉法律条文与具体案例相结合,对秦汉家族犯罪的类型逐一进行了分析和总结,在此基础上分析了秦汉家族犯罪的演变、特点、影响以及政府所采取的控制措施。进而说明秦汉法律本身就蕴含了家族主义和等级观念因素,而并非法律儒家化的结果。     

严万里《商君书校》校勘特色平议

<商君书校>一书,以其校勘的精审、方法的缜密见长.著者淹博通贯,小学根底扎实,且熟谙于朴学家校治古书之法,因而在校勘的实践中应付裕如,左右逢源.在校勘上搜罗宏富,征引广博,在指出诸本文字差异的同时,抉择按断,兼下己意.不盲从古本或善本,敢于大胆发疑,刊改漏失,补苴未备,提出了若干具有创造性的新见解.校勘文字,大胆审慎,...     

Rotenone induces more serious learning and memory impairment than α-synuclein A30P does in Drosophila

Parkinson’s disease (PD) is a heterogenous disease caused by multifactorial etiology. PD is characterized by the loss of dopaminergic (DA) neurons in the substantia nigra and the accumulation of Lewy bodies. In this study, two Drosophila PD models by exposing Drosophila to rotenone (sporadic PD models) are proposed, and the human α-synuclein A30P protein (family PD models) in Drosophila is expressed respectively. Both models recapitulated the main human PD symptoms including the loss of dopaminergic neurons...     

浅析当代社会思潮对高校学生思想行为的影响及对策

本文首先从政治、经济、文化、社会和哲学等角度阐述了当代中国主要的社会思潮,进而归纳出受这些社会思潮影响、具有鲜明时代特性的当代大学生思想行为特点,最后对如何引导学生树立正确的思想行为观念提出建议。     

Complementary feeding patterns among ethnic groups in rural western China

Objective

This study investigated complementary feeding practices among four ethnic groups (Han, Uygur, Tibetan, and Zhuang) based on a cross-sectional survey in rural western China.

Methods

In 2005, a stratified multistage cluster random sampling method was used to recruit 9712 children (7411 Han, 1032 Uygur, 678 Tibetan, and 591 Zhuang) between 6 and 35 months of age and their mothers from 45 counties in 10 provinces (autonomous regions, municipalities) in western China.

Results

The rates of early introduction (before 6 months) of complementary foods in four ethnic groups (Han, Uygur, Tibetan, and Zhuang) were 71.30%, 95.95%, 82.40%, and 72.30%, respectively. The Infant and Child Feeding Index (ICFI) for Uygur and Tibetan children was lower than that for Han children at all age groups. Uygur children were more likely to have unqualified ICFI compared with Han children in a multivariate logistic regression (odds ratio (OR)=5.138, 95% confidence interval (CI): 4.340–6.084). A higher level of maternal education, greater family wealth, and the availability of complementary feeding educational materials decreased the likelihood of an unqualified ICFI. The nutritional status of children (Han, Tibetan, and Zhuang) with qualified ICFI was better than that for children with unqualified ICFI.

Conclusions

Appropriate interventions are required to improve complementary feeding practices in rural western China.