知识地图教学法在大学化学教学实践中的应用

为给学生呈现化学学科全貌，特在教学过程中进行了知识地图教学法的应用实践：精心准备绪论课内容；详细分析教材目录，让学生对课程内容、结构及学习方法有清晰的了解；授课过程中，注意剖析关键知识点之间的联系。使得学生对整个大学化学课程建立整体印象。在掌握关键知识点的同时，构建科学合理的知识体系，避免学生只见树木，不见森林。     

开放性大学物理实验与大学生创新项目

开放性大学物理实验作为大学物理实验的改革方向及当代大学物理实验的重要组成部分,在我国大部分高校正在开展,也得到了各高校的重视。大学生创新项目作为高校科技处或者教务处组织的大学生活动,在培养大学生的创新能力方面起到非常重要的作用。本文介绍了开放性大学物理实验的作用与特点、大学生创新项目的人才培养作用,结合我院实际情况,提出了开放性大学物理实验与大学生创新项目的相辅相成作用。本文认为开放性大学物理实验与大学生创新项目结合,可以对两者的发展都起到非常好的促进作用。     

Conditions for proving by mathematical induction to be explanatory

In this paper we consider proving to be the activity in search for a proof, whereby proof is the final product of this activity that meets certain criteria. Although there has been considerable research attention on the functions of proof (e.g., explanation), there has been less explicit attention in the literature on those same functions arising in the proving process. Our aim is to identify conditions for proving by mathematical induction to be explanatory for the prover. To identify such conditions, we analyze videos of undergraduate mathematics students working on specially designed problems. Specifically, we examine the role played by: the problem formulation, students’ experience with the utility of examples in proving, and students’ ability to recognize and apply mathematical induction as an appropriate method in their explorations. We conclude that particular combinations of these aspects make it more likely that proving by induction will be explanatory for the prover.     

基于模糊理论的绿色大学评价模型

绿色大学评价是一个多指标,多属性且具有模糊性的评价过程,由模糊层次分析法确立了评价指标权重,建立了绿色大学的模糊综合评价模型.利用提出的评价模型对高等院校进行评价能够更客观,更科学地反映绿色大学的创建情况.     

“双一流”背景下高等电化学课程改革与创新

以电化学原理与应用课程为例,结合中南大学“双一流”建设需要,提出高等电化学课程改革和创新的重要性。从教学内容、教学模式、教材资料和教学团队等方面的发展历程深入探讨了本课程的改革和创新方法,并对比展示了课程改革的初步成效。相信本课程的改革与创新探索研究对于研究生教育教学改革工作具有积极的推动作用。     

Possible steps to the emergence of life: the [GADV]-protein world hypothesis

Based on the fact that RNA has not only a genetic function but also a catalytic function, the RNA world theory on the origin of life was first proposed about 20 years ago. The theory assumes that RNA was amplified by self-replication to increase RNA diversity on the primitive earth. Since then, the theory has been widely accepted as the most likely explanation for the emergence of life. In contrast, we reached another hypothesis, the [GADV]-protein world hypothesis, which is based on pseudo-replication of [GADV]-proteins. We reached this hypothesis during studies on the origins of genes and the genetic code, where [G], [A], [D], and [V] refer to Gly, Ala, Asp, and Val, respectively. In this review, possible steps to the emergence of life are discussed from the standpoint of the [GADV]-protein world hypothesis, comparing it in parallel with the RNA world theory. It is also shown that [GADV]-peptides, which were produced by repeated dry-heating cycles and by solid phase peptide synthesis, have catalytic activities, hydrolyzing peptide bonds in a natural protein, bovine serum albumin. These experimental results support the [GADV]-protein world hypothesis for the origin of life.     

Spectral reordering of a range-dependent weighted random graph

^** Email: aas96106{at}maths.strath.ac.uk Grindrod (2002. Phys. Rev. E, 66, 0667021–0667027) posedthe problem of reordering a range-dependent random graph andshowed that it is relevant to the analysis of data sets frombioinformatics. Reordering under a random graph hypothesis canbe regarded as an extension of clustering and fits into thegeneral area of data mining. Here, we consider a generalizationof Grindrod's model and show how an existing spectral reorderingalgorithm that has arisen in a number of areas may be interpretedfrom a maximum likelihood range-dependent random graph viewpoint.Looked at this way, the spectral algorithm, which uses eigenvectorinformation from the graph Laplacian, is found to be automaticallytuned to an exponential edge density. The connection is precisefor optimal reorderings, but is weaker when approximate reorderingsare computed via relaxation. We illustrate the performance ofthe spectral algorithm in the weighted random graph contextand give experimental evidence that it can be successful forother edge densities. We conclude by applying the algorithmto a data set from the biological literature that describescortical connectivity in the cat brain.     

农业院校研究生“现代化学化工实验技术”课程的设计与教学实践

“现代化学化工实验技术”是根据农业院校研究生的生源特点和化学工程与技术专业的培养要求开设的一门专业课程。论文介绍了课程教学团队在实验教学体系的构建、教学内容的设计、教学模式的改革和课程网络平台的建设等方面的实践情况。实践表明,该课程对培养应用化学、生物化工、工业催化、化学工程等专业研究生的化学化工基本操作技能以及创新和研究能力发挥了重要作用,为从事学位研究工作打下良好的基础。     

Spatial and Temporal Behaviors in a Modified Evolution Model Based on Small World Network

In this paper, we introduce a new modified evolution model on a small world network. In our model,the spatial and temporal correlations and the spatial-temporal evolve pattern of mutating nodes exhibit some particular behaviors different from those of the original BS evolution model. More importantly, these behaviors will change with φ, the density of short paths in our network.     

Crossing w=1 in Gauss-Bonnet Brane World with Induced Gravity

Recent type Ia supernovas data seemingly favor a dark energy model whose equation of state w（z） crosses -1 very recently, which is a much more amazing problem than the acceleration of the universe. In this paper we show that it is possible to realize such a crossing without introducing any phantom component in a Gauss-Bonnet brane worm with induced gravity, where a four-dimensional curvature scalar on the brahe and a five-dimensional Gauss-Bonnet term in the bu/k are present. In this realization, the Gauss-Bonnet term and the mass parameter in the bulk play a crucial role.