高转速框架式动力机器基础的设计

本文通过对某工程高转速动力机器基础的振动分析，提出了高速转速动力机器基础的设计方法。     

Algorithms for semi on-line multiprocessor scheduling problems

In the classical multiprocessor scheduling problems, it is assumed that the problems are considered in off-line or on-line enviromnent. But in practice, problems are often not really off-line or on-line but somehow in between. This means that, with respect to the on-line problem, some further information about the tasks is available, which allows the improvement of the performance of the best possible algorithms. Problems of this class are called semi on-line ones. The authors studied two semi on-line multiprocessor scheduling problems, in which, the total processing time of all tasks is known in advance, or all processing times lie in a given interval. They proposed approximation algorithms for minimizing the makespan and analyzed their performance guarantee. The algorithms improve the known results for 3 or more processor cases in the literature.     

纳米科学与纳米材料

纳米科学与技术是21世纪的一门高新技术.而纳米材料又是纳米科学技术的重要组成部分.文章主要阐述纳米科学与技术的基本概念,纳米材料的应用及其研究的新进展.     

视觉传感的介绍及其行业发展趋势

视觉传感作为一种应用系统,其功能特点是随着工业自动化的发展而逐渐完善和发展的.该文介绍了视觉传感的概念和基本工作原理;探讨了视觉传感的优越性及其在工业生产过程中的应用;讨论了我国的视觉传感行业的发展趋势.     

小波变换在多仿生机器鱼视觉系统中的应用研究

针对集控式多仿生机器鱼系统（multiple robot fishes coordinate System，MRFS）的实际要求和特点，采用小波变换对图像进行去噪处理．利用图像与噪声的小波模极大值随尺度变化大小不同，通过极大模点在各个尺度的取值来确定噪声的位置和特征，从而完成去噪目的．     

热超声倒装键合机视觉系统的设计与实现

针对热超声倒装键合过程中对准工作的特点,确定合理的视觉自动对准方案,在对多种颜色和形状的LED光源进行实验对比的基础上,设计环形LED光源与单个LED发光二极管组合的照明方式,使芯片、基板表面亮度一致且表面几何特征清晰。视觉软件以HexSight为核心,利用创建参考点实现不同目标的识别,并对2个CCD摄像机的控制方案进行优化。通过分析多次识别结果对单项误差进行评估,并以实验用1 mm×1 mm的表面有8个凸点的芯片为例计算视觉识别系统的综合误差,结果表明此视觉识别系统满足芯片键合时对定位精度的要求。     

机器视觉系统的设计

介绍了机器视觉系统的概念,提出了机器视觉系统的典型组成,在进行用户需求分析的基础上,详细讨论了如何利用光源、光学镜头、摄像机、图像采集卡以及图像处理软件等主要部件来设计开发一个焊缝机器视觉应用系统的关键技术.最后给出了一个焊缝检测应用实例.     

The Yarn Curve and Tension in Rotor Spinning

The effective way of finding the yarn curve shape and tension of OE（open end） yarn inside the rotor is carried out and treated by dividing the yarn curve into two parts, from which the trajectory of the yarn sliding on the navel surface is also obtained. It is pointed out that the yarn curve shape and tension will both fluctuate with the trajectory＇s revolving cycle inside the rotor. However, the fluctuation is not too great, so the motion can still be regarded as approximately steady for dynamic analysis.