一流课程建设——基础化学实验

从教学团队、课程内容、教学模式、教学条件及考核模式等方面的改革介绍了基础化学实验一流课程建设,即以开展实验教学培训、鼓励交流合作、打破编制壁垒建设实验教学团队;以科研反哺教学、开展实验竞赛、注重教材建设改革课程内容;以“讲一练二考三”“简易混合式”“思想实验”等创新教学模式培养学生创新能力;以更新仪器设备及运用信息技术改进教学条件;并通过评教机制及魅力化学实验课堂机制改革基础实验考核模式。     

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 world with induced gravity, where a four-dimensional curvature scalar on the brane and a five-dimensional Gauss-Bonnet term in the bulk are present. In this realization, the Gauss-Bonnet term and the mass parameter in the bulk play a crucial role.     

Small World Properties Generated by a New Algorithm Under Same Degree of All Nodes

Based on the model of the same degree of all nodes we proposed before, a new algorithm, the so-called “spread all over vertices” (SAV) algorithm, is proposed for generating small-world properties from a regular ring lattices. During randomly rewiring connections the SAV is used to keep the unchanged number of links. Comparing the SAV algorithm with the Watts-Strogatz model and the “spread all over boundaries” algorithm, three methods can have the same topological properties of the small world networks. These results offer diverse formation of small world networks. It is helpful to the research of some applications for dynamics of mutual oscillator inside nodes and interacting automata associated with networks.     

Expected degree for RNA secondary structure networks

Consider the network of all secondary structures of a given RNA sequence, where nodes are connected when the corresponding structures have base pair distance one. The expected degree of the network is the average number of neighbors, where average may be computed with respect to the either the uniform or Boltzmann probability. Here, we describe the first algorithm, RNAexpNumNbors , that can compute the expected number of neighbors, or expected network degree, of an input sequence. For RNA sequences from the Rfam database, the expected degree is significantly less than the constrained minimum free energy structure, defined to have minimum free energy (MFE) over all structures consistent with the Rfam consensus structure. The expected degree of structural RNAs, such as purine riboswitches, paradoxically appears to be smaller than that of random RNA, yet the difference between the degree of the MFE structure and the expected degree is larger than that of random RNA. Expected degree does not seem to correlate with standard structural diversity measures of RNA, such as positional entropy and ensemble defect. The program RNAexpNumNbors is written in C, runs in cubic time and quadratic space, and is publicly available at http://bioinformatics.bc.edu/clotelab/RNAexpNumNbors . © 2014 Wiley Periodicals, Inc.     

Developing the roots of modelling conceptions: ‘mathematical modelling is the life of the world’

A study conducted with 25 Year 6 primary school students investigated the potential for a short classroom intervention to begin the development of a Modelling conception of mathematics on the way to developing a sense of mathematics as a way of thinking about life. The study documents the developmental roots of the cognitive activity, actions and conceptions of both modelling and mathematics that these beginners to modelling displayed. Understanding the conceptions of mathematics that students might hold or be developing and how these can be influenced in early schooling are essential ingredients in any plans for introducing modelling seriously into primary school classrooms. The majority of the students (22/25) were identified as displaying a developing conception of modelling as a way of problem handling. The three other students displayed the developmental roots of a way of understanding the world conception of modelling. These three students also displayed a Modelling conception of mathematics with one showing indications of developing towards a Life conception of mathematics.     

基于免疫猴群算法的传感器优化布置方法研究

将生物界中的免疫机制引入到猴群算法中,提出了一种用于传感器优化布置的免疫猴群算法。采用双重编码的方式,克服了原猴群算法只能解决连续变量优化问题的缺陷;采用混沌搜索的方式初始化猴群位置,以保证猴子能够均匀分布,提高了算法的全局搜索能力;通过在爬过程中引入深度爬的方式,增强了算法的局部搜索能力;在爬过程结束后加入基于浓度选择的机制对猴群进行初次选择,并对位置最优的猴子进行免疫克隆操作,以此保证猴群的多样性;在望过程结束后加入基于适应度的二次选择,并对位置较差的猴子进行免疫疫苗注射,以此提高算法的收敛能力。文末以大连世贸大厦为例,进行了参数敏感性分析以及传感器优化布置方案的选择,结果表明,免疫猴群算法的搜索效率较原猴群算法有了大幅提高,能较好地解决传感器优化布置问题。     

把科技竞赛引入大学物理实验的尝试

把大学物理实验与科技竞赛结合起来,以此鼓励学生参与实验设计、仪器维护、实验手段的改进和创新的热情,激发大学生对物理实验的兴趣与潜能,进而提高物理实验教学质量及学生的自主创新能力.     

基于信息化技术的大学物理实验教学改革与探索

实验课程是提高大学生应用能力的一种重要手段。但近年来,一些高校的学生实验课成绩却出现了整体下滑的现象。为了进一步促进大学实验教学的改革与提升,本文对内蒙古工业大学五十余个专业近五年的物理实验课成绩进行了抽样分析。分析结果表明,实验教学内容更新缓慢,学生对物理实验的重视程度不够、实验本身吸引力欠缺、教法改进不足等都是导致学生成绩下滑的重要因素。针对这些问题给出了改进大学物理实验教学的方法和建议。     

Deterministic self-similar models of complex networks based on very symmetric graphs

Using very symmetric graphs we generalize several deterministic self-similar models of complex networks and we calculate the main network parameters of our generalization. More specifically, we calculate the order, size and the degree distribution, and we give an upper bound for the diameter and a lower bound for the clustering coefficient. These results yield conditions under which the network is a self-similar and scale-free small world network. We remark that all these conditions are posed on a small base graph which is used in the construction. As a consequence, we can construct complex networks having prescribed properties. We demonstrate this fact on the clustering coefficient. We propose eight new infinite classes of complex networks. One of these new classes is so rich that it is parametrized by three independent parameters.