主动进气格栅技术研究

随着主动进气格栅技术在汽车上的逐步使用,主动进气格栅的技术优势逐步体现,文章阐述了主动进气格栅对整车行驶阻力的优化和整车热控制的相关影响,并以线性回归模型的方法对主动进气格栅的标定方法进行了初步探索。     

Sliding mode control for active magnetic bearing system with flexible rotor

This paper presents the analysis and control of active magnetic bearing (AMB) systems with a flexible rotor. A sliding mode controller design scheme is proposed to compensate for the nonlinear effects of the AMB system. A nonlinear model of the AMB system with an electromagnetic actuator and a flexible rotor is proposed to facilitate the present system analysis and controller design. This nonlinear model takes into account the dynamics of the flexible rotor, the characteristics of the nonlinear electromagnetic suspended system, and the contact force between the auxiliary bearing and the shaft. This study also considers the auto-centering control of the AMB system when subjected to disturbances and variations in the system parameters. The numerical results show that the system exhibits a periodic motion and demonstrates high accuracy and robustness when operating under sliding mode control.     

Physical versus virtual manipulative experimentation in physics learning

The aim of this study was to investigate whether physical or virtual manipulative experimentation can differentiate physics learning. There were four experimental conditions, namely Physical Manipulative Experimentation (PME), Virtual Manipulative Experimentation (VME), and two sequential combinations of PME and VME, as well as a control condition (i.e., traditional instruction with absence of PME or VME). Undergraduate students' understanding of physics concepts in the domain of heat and temperature was tested in a pre- and posttest design that involved 182 participants assigned to the four experimental groups and 52 participants assigned to the control group. Conceptual tests were administered to assess students' understanding before, during and after instruction. The analyses revealed that the four experimental conditions were equally effective in promoting students' understanding of concepts in the domain of heat and temperature and better than the control condition; hence, manipulation, either physical or virtual manipulation, and not physicality, as such, at least in a context like the one of the present study, is important in physics learning.     

The Magical Number 7

This article describes an interactive activity that involves students participating in a memory recall test. Data collected from the activity may be used to illustrate the one‐sample t test or one‐sample sign test.     

浅析《大学物理实验》课程的教学改革与实践

针对大学物理实验课程的特点,结合合肥师范学院物理与电子工程系多年的办学经验和教学科研条件,本文系统研究了大学物理实验课程教学手段、教学内容、教学方法等方面的改革,总结了技术应用型人才培养模式的创新经验与特色,旨在深化教学改革,努力培养有特色的高素质应用型人才。改革后的实践表明,大学物理实验教学质量有了明显的提高,学生的创造性思维能力和实际动手能力得到了加强,学生的综合素质也有了很大的提高。     

清华物理与晚近中国——兼论旗舰大学与民族国家的互动

南京政府初期,清华在短短几年间崛起为世界级学府,其物理学科尤为卓越。该系不仅在全国遥遥领先,且有着很高的国际能见度。该系有着优秀的人才机制,其人才储备与办学经验主要受益于加州理工学院和芝加哥大学;在办学实践中,该系注重研究、尤重实验,并在通才教育的基础上,实行个性化的天才教育;该系还注重组织文化建设,从而最终形成了强劲的创新机制和柔性高效的大学制度。其科研工作已跃居远东顶尖水准,该系师生成为在国际顶尖期刊发表成果的主要的中国学人群之一;其本科教育,已接近欧美顶级大学的标准;其成材率极高,在几年间就孕育了一二十位世界级学者。他们对中国的学术独立和民族独立有着巨大贡献,对中国的工业化、国防建设和民族复兴亦影响深远。     

武术影视对武术运动传播发展的积极影响与作用

随着现代化社会的发展,武术影视已成为我国影视业发展的重要组成部分,武术影视通过不断创新突破,不仅有效地促进了影视事业的发展进步,同时也对我国武术运动的传播与发展产生了积极、深远的影响。文章通过研究,辨证、客观地分析了武术影视对武术运动所产生的一些积极影响和作用,从而为我国武术运动更好、更快地传播与发展提供一些服务和参考。     

粒子物理开放存取出版资助联盟简介与评价

粒子物理开放存取出版资助联盟(SCOAP3)致力于把全世界范围内粒子物理研究机构和图书馆组织起来,把它们用于订购粒子物理期刊的订购经费转变为支持这些期刊进行开放存取出版的资助经费,通过这一资助模式实现粒子物理领域全部高质量期刊的开放存取出版。SCOAP3资助模式具有科学合理的运作流程,可节省粒子物理科研机构、图书馆订购期刊的费用,为出版商提供稳定的收入,并且取消作者出版费用的做法也使出版商获得更多的投稿支持。     

高中物理探究性教学模式研究

新课程改革的根本理念是关注学生的全面发展,重点培养学生的创新精神和实践能力,高中物理作为一门培养学生科学活动的学科,力求突破传统的教学方式,实施探究性教学,是响应新课改要求所做的重要改革,把探究性教学模式实施在高中物理教学中,能充分发挥学生作为课堂主体的作用,强化学生动手、动脑的能力,达到良好的教学效果。