继承传统文化之精华 发展现代整体衡动观

初步探讨了元极图的整体衡动观之来源与发展。     

基于四轴运动控制教学平台的多元实践体系改革

针对高等教育教学中重理论、轻实践,未注重学生创新能力以及综合能力培养等问题,设计了一款可模拟实际工业检测分类装置的运动控制教学平台。该平台不但能够很好地模拟实际的工业场景,实现基本的运动控制功能,还具有很好的开放性和可扩展性。运动控制教学平台既可用于随堂常规实践,也可用于注重学生创新能力及综合思维能力培养的课程设计和毕业设计,形成多元化的实践教学体系。在加深学生对所学知识理解的基础上,充分锻炼他们的创新能力、解决问题的能力以及工程实践能力,培养真正适应于社会的工程应用型人才。     

Classroom

In this section of Resonance, we invite readers to pose questions likely to be raised in a classroom situation. We may suggest strategies for dealing with them, or invite responses, or both. “Classroom” is equally a forum for raising broader issues and sharing personal experiences and viewpoints on matters related to teaching and learning science. This project was done as part of the Research Education Advancement Programme held over weekends at the Bangalore Association for Science Education, Jawaharlal Nehru Planetarium, Bangalore.     

DNA’s new avatar as nanoscale construction material

DNA is fast taking on a new aspect utilizing it’s physical property of persistence length and chemical property of base pairing to build architectures in 1D, 2D and 3D. This field is called structural DNA nano-technology and is poised to revolutionize several areas ranging from materials science to cell biology.     

一种有效的基于运动矢量场的压缩域运动对象分割算法

In this paper an efficient compressed domain moving object segmentation algorithm is proposed, in which the motion vector (MV) field parsed from the compressed video is the only cue used for moving object segmentation. First the MV field is temporally and spatially normalized, and then accumulated by an iterative backward projection to enhance salient motions and alleviate noisy MVs. The accumulated MV field is then segmented into motion-homogenous regions using a modified statistical region growing approach. Finally, moving object regions are extracted in turn based on minimization of the joint prediction error using the estimated motion models of two region sets containing the candidate object region and other remaining regions, respectively. Experimental results on several H.264 compressed video sequences demonstrate good segmentation performance.     

塑料吹瓶机顺序控制系统研究

根据塑料中空吹瓶机的生产工艺，通过PLC硬件配置及编程，设计了塑料中空吹瓶机的气路系统和顺序控制系统．该系统采用气压传动，对塑料中空制品无污染，动作迅速，便于PLC控制，同时该系统采用可编程控制器的步进功能指令，具有设计、调试简单直观的优点，在实现中空吹瓶机顺序控制中具有优越性。     

地面运动目标与合成孔径雷达的讨论

本文主要讨论了地面运动目标与合成孔径雷达的关系，并进一步介绍了地面运动目标对合成孔径雷达的影响。     

等离子体中的波动

分析了“冷”、“热”等离子体中波动现象的普遍色散关系,比较了其异同点,给出了反映“冷”等离子体中波动分类的CMA图和反映“热”等离子体中波动的(ω,κ)色散关系图．     

火花记时法测量液体粘度

用高压火花记时系统测量液体的粘度 ,减少了偶然误差和系统误差 ,扩充了实验方法 ,有利于拓宽学生的视野 ,提高其实验技能     

划船式短跑途中跑技术脚着地期间的生物力学分析

"后蹬式或屈蹬式短跑途中跑技术脚着地期间的生物力学分析经典理论"是在脚着地期间先"缓冲"、再"后蹬"的生物力学分析理论,文章提出的"划船式短跑途中跑技术脚着地期间的生物力学分析理论"合理解释了短跑途中跑前支撑时期是主要动力来源,后支撑时期着地腿的运动是前支撑时期转动—平动的继续