改革实践教学体系,培养电工电子实践能力

针对电工电子技能和能力培养的需要,构建了《电工学》实践教学体系,优化整合了实践教学内容。通过完善实践教学基地、科学组织实施教学过程以及考核方法改革等措施,取得了比较满意的教学效果。     

家电以旧换新补贴政策的数理模型分析

为应对全球性金融危机,稳定经济增长、拉动内需成为中国的重要举措,而以政府财政补贴方式实行的家电以旧换新政策,就是我国采取的具体举措之一。从数理经济学的角度,分析比较家电制造商自身实行以旧换新策略和政府实行以旧换新补贴政策的价格以及补贴额之间的关系可知,政府以旧换新政策更有利于扩大消费者对家电产品的需求,同时更能促进制造商积极开展旧产品回收,使资源得到充分有效利用,促进循环经济的发展。因此,建议政府应鼓励由制造商自身负责回收,同时给予相应补贴支持建立闭环供应链。     

不同导电材料的Hall系数

本文利用理论分析和实验测量相结合的方法,推导出几种导电材料在不同情况下的Hall系数的表达式。     

A flexible statistical and efficient computational approach to object location applied to electrical tomography

In electrical tomography, multiple measurements of voltage are taken between electrodes on the boundary of a region with the aim of investigating the electrical conductivity distribution within the region. The relationship between conductivity and voltage is governed by an elliptic partial differential equation derived from Maxwell’s equations. Recent statistical approaches, combining Bayesian methods with Markov chain Monte Carlo (MCMC) algorithms, allow to greater flexibility than classical inverse solution approaches and require only the calculation of voltages from a conductivity distribution. However, solution of this forward problem still requires the use of the Finite Difference Method (FDM) or the Finite Element Method (FEM) and many thousands of forward solutions are needed which strains practical feasibility. Many tomographic applications involve locating the perimeter of some homogeneous conductivity objects embedded in a homogeneous background. It is possible to exploit this type of structure using the Boundary Element Method (BEM) to provide a computationally efficient alternative forward solution technique. A geometric model is then used to define the region boundary, with priors on boundary smoothness and on the range of feasible conductivity values. This paper investigates the use of a BEM/MCMC approach for electrical resistance tomography (ERT) data. The efficiency of the boundary-element method coupled with the flexibility of the MCMC technique gives a promising new approach to object identification in electrical tomography. Simulated ERT data are used to illustrate the procedures.     

基于学生创新能力与素质教育的机电课程教学改革

教与学是大学教育的两个基本方面,通过教学改革建立激发学生自主提高创新能力与素质的机制,是实现学生创新能力培养与素质教育的关键。更新教育理念,改革课程设置及其相应的考核方式。研究表明,激发学生学习与创新的自主性,对培养学生创新能力、提高学生素质可起到重要的促进作用。     

电工技术实践教学的改革与实践简

电工技术实践教学是理论教学的前沿阵地,也是保证教学质量,实现素质教育的主要手段。加强实践教学的改革创新,适应科技的发展,符合人才培养和教学需求。针对目前电工技术实践教学存在的问题,提出改变验证性实验,加强设计性、创新性实验,开展实验开放,实施规范考核制度的实验教学方法和思路,并就此从几个方面入手分别来阐述电工实验课程的改革与实践过程。     

Imaging convex quadrilateral inclusions in uniform conductors from electrical boundary measurements

We demonstrate simulation-based Bayesian imaging from electrical impedance tomographic data, by summarizing the set of conductance images which could give rise to the data. The forward map from conductance image to data requires the solution of a partial differential equation subject to boundary conditions. We develop the example of recovering an unknown convex polygonal insulating inclusion within an object made of otherwise uniformly conducting material, and illustrate our methods with noisy synthetic data. Sampling is carried out using Markov chain Monte Carlo with the efficiency of the algorithm investigated over a range of noise levels.     

电工学实验中异常现象的分析与防止

分析电工学实验中几种异常现象，并且对影响实验及其结果的异常现象提供防止措施。