《橘颂》赏析

《橘颂》是屈原早年的一篇赋作。诗歌以橘树为喻，表达了自己追求美好品质和理想的坚定意志。以优美典雅的句子，物我交融的创作手法，展现了诗人昂扬奋发的精神面貌。     

University teachers’ perspectives on the role of the Laplace transform in engineering education

The Laplace transform is an important tool in many branches of engineering, for example, electric and control engineering, but is also regarded as a difficult topic for students to master. We have interviewed 22 university teachers from five universities in three countries (Mexico, Spain and Sweden) about their views on relationships among mathematics, physics and technology/application aspects in the process of learning the Laplace transform in engineering education. Strikingly, the teachers held a spectrum of qualitatively differing views, ranging from seeing virtually no connection (e.g. some thought the Laplace transform has no relevance in engineering), through to regarding the aspects as intimately, almost inseparably linked. The lack of awareness of the widely differing views among teachers might lead to a lack of constructive alignment among different courses that is detrimental to the quality of engineering education.     

基于Ostu优化的PCNN电力故障区域提取

为更好实现红外图像中电力设备故障区域的提取,提出改进PCNN(脉冲耦合神经网络) 的故障区域提取方法。基于Otsu 算法(大津法,又称最大类间差法) 计算红外图像的最优分割阈值,作为PCNN 迭代的初始阈值。以最大类间方差作为PCNN 模型的收敛判据,实现红外图像自动分割以提取电力故障区域。实验表明,该算法与Otsu、K-means、传统PCNN 方法相比,能够更全面、精确地提取电力故障区域,为后续故障类型识别奠定基础。     

The Concept of Electrical Resistance: How Cassirer's Philosophy,and the Early Developments of Electric Circuit Theory,Allow a Better Understanding of Students' Learning Difficulties

While students' difficulties concerning the concepts of voltage and intensity have been investigated by many science education researchers, difficulties related to the concept of electrical resistance and circuit are less known. Some researchers in science education even state that students have no preconception about this concept before being taught. Our observations are in disagreement with this assumption. In the first section of this paper the main basic features of the difficulties of students confronted with the concept of electrical resistance are investigated. In the second section we discuss the nature of the electrical resistance concept in the light of Cassirer philosophy while in the third section we give an analysis of this concept going back to its origins in the nineteenth century. Finally, an analysis of the way this concept is taught in French high schools is presented and the first results of a experimentation using an alternative teaching strategy are briefly reported.c     

最小工作条件法在电气设备实训课程中的应用

针对在电气设备实训课中的教法问题,提出了最小工作条件法,该方法是从最小工作条件入手,逐一激活工作条件,学生在实训过程中自我检查、自我排查、自我完成,实验结果验证了该方法的有效性。     

新课程下构建真切的师生互动关系

在课堂教学中如何真正实施师生互动，是本次新课程改革实践层面应关注的重要课题。通过对当前课堂教学中师生互动性不强的表现及其原因分析，提出了在新课程理念下加强师生互动性的策略，即强化互动教学的人际关系、互动教学的情景设置、互动教学的讨论互辩。     

基于轨道交通的电气类专业实践教学探索

面向轨道交通行业和区域经济建设,以“厚基础、重实践、强能力、求创新”为基本原则,对电气工程及其自动化专业实践教学改革进行探讨。以理论和实践教学为主渠道,将实践教学分为基础性实践教学、专业性教学和创新性实践教学三个层次。利用虚拟现实技术开发了地铁施工动态仿真系统、地铁站虚拟仿真系统和牵引变电所仿真培训系统,同时结合河北省“城市轨道交通通信与行车控制”重点实验室,实现“虚实结合”的校内外实践模式。经过多年的实践过程,为培养综合性、创新性人才提供了广阔的平台。     

适应经济发展需要大力发展应用文科类专业--对泰职院专业设置的思考和建议

随着中国加入WTO和产业结构调整 ,文、经、法、管等领域文科类高职人才紧缺。高职教育应顺应时代发展的趋势 ,与时俱进 ,及时调整专业结构 ,主动适应社会需求 ,加快紧缺人才的培养。本文分析了泰州职业技术学院发展应用文科类专业的必要性和可行性 ,指出了文科类专业有很大的发展空间     

高密度电法在岩溶地区工程勘察中的应用

以福建龙岩某工程为例，论述高密度电法在岩溶地区工程中探测不良地质体的具体应用。     

An Investigation of Undefined Cut Scores With the Hofstee Standard‐Setting Method

This article provides an overview of the Hofstee standard‐setting method and illustrates several situations where the Hofstee method will produce undefined cut scores. The situations where the cut scores will be undefined involve cases where the line segment derived from the Hofstee ratings does not intersect the score distribution curve based on actual exam performance data. Data from 15 standard settings performed by a credentialing organization are used to investigate how common undefined cut scores are with the Hofstee method and to compare cut scores derived from the Hofstee method with those from the Beuk method. Results suggest that when Hofstee cut scores exist that the Hofstee and Beuk methods often yield fairly similar results. However, it is shown that undefined Hofstee cut scores did occur in a few situations. When Hofstee cut scores are undefined, it is suggested that one extend the Hofstee line segment so that it intersects the score distribution curve to estimate cut scores. Analyses show that extending the line segment to estimate cut scores often yields similar results to the Beuk method. The article concludes with a discussion of what these results may imply for people who want to employ the Hofstee method.