A parallel algorithm for approximate regularity

Spatial regularity amidst a seemingly chaotic image is often meaningful. Many papers in computational geometry are concerned with detecting some type of regularity via exact solutions to problems in geometric pattern recognition. However, real-world applications often have data that is approximate, and may rely on calculations that are approximate. Thus, it is useful to develop solutions that have an error tolerance.

A solution has recently been presented by Robins et al. [Inform. Process. Lett. 69 (1999) 189–195] to the problem of finding all maximal subsets of an input set in the Euclidean plane that are approximately equally-spaced and approximately collinear. This is a problem that arises in computer vision, military applications, and other areas. The algorithm of Robins et al. is different in several important respects from the optimal algorithm given by Kahng and Robins [Patter Recognition Lett. 12 (1991) 757–764] for the exact version of the problem. The algorithm of Robins et al. seems inherently sequential and runs in O(n^5/2) time, where n is the size of the input set. In this paper, we give parallel solutions to this problem.     

图形协同标绘系统的研究与设计

讨论了一个远程同步的图形协同系统的设计与实现,重点研究了在协同工作中的交互技术,讨论了人－人界面的图形交互技术,并发控制策略以及协同感知的设计。     

圆网印花控制系统中的多机通讯实现

根据分布式圆网印花控制系统的具体情况,设计出基于ＲＳ４８５的简化ＢＩＴＢＵＳ总线通讯方案,实现了主机和各从机之间的通讯,满足了系统协调控制的要求。     

UIMS的表示方法的研究

用户接口是任何交互式系统中至关重要的关键部件之一。它的开发已成为系统设计和实现中最为困难费时的“瓶颈“。用户接口管理系统ＵＩＭＳ接受了这一新的挑战,已成为人机交互和软件工程学科中的重要研究方向。本文将试图较全面地介绍和总结ＵＩＭＳ结构模型和表示方法等。     

A digital photography framework enabling affective awareness in home communication

By transforming the personal computer into a communication appliance, the Internet has initiated the true home computing revolution. As a result, Computer Mediated Communication (CMC) technologies are increasingly used in domestic settings, and are changing the way people keep in touch with their relatives and friends. This article first looks at how CMC tools are currently used in the home, and points at some of their benefits and limitations. Most of these tools supportexplicit interpersonal communication, by providing a new medium for sustaining conversations. The need for tools supportingimplicit interaction between users, in more natural and effottless ways, is then argued for. The idea of affective awareness is introduced as a general sense of being in touch with one's family and friends. Finally, the KAN-G framework, which enables affective awareness through the exchange of digital photographs, is described. Various components, which make the capture, distribution, observation and annotation of snapshots easy and effortless, are discussed.     

压铸机计算机控制系统研究

系统地介绍了28000kN压铸机计算机控制系统的设计。在硬件方面,输入输出板均采用了光隔,抗干扰能力强。在软件设计上,采用定时中断,即实现了高速采样,又可周期性地扫描输入输出端口的状态,循环发出动作指令,这种模拟可编程控制器的程序设计方法,大大提高了整个系统的性能。     

微机控制纤维缠绕三通管机械

本文简单介绍了由计算机控制纤维缠绕三通管的设备工作原理及芯模设计。     

Reasoning about reasoning in a meta-level architecture

In this paper we discuss reasoning about reasoning in a multiple agent scenario. We consider agents that are perfect reasoners, loyal, and that can take advantage of both the knowledge and ignorance of other agents. The knowledge representation formalism we use is (full) first order predicate calculus, where different agents are represented by different theories, and reasoning about reasoning is realized via a meta-level representation of knowledge and reasoning. The framework we provide is pretty general: we illustrate it by showing a machine checked solution to the three wisemen puzzle. The agents' knowledge is organized into units: the agent's own knowledge about the world and its knowledge about other agents are units containing object-level knowledge; a unit containing meta-level knowledge embodies the reasoning about reasoning and realizes the link among units. In the paper we illustrate the meta-level architecture we propose for problem solving in a multi-agent scenario; we discuss our approach in relation to the modal one and we compare it with other meta-level architectures based on logic. Finally, we look at a class of applications that can be effectively modeled by exploiting the meta-level approach to reasoning about knowledge and reasoning.     

系列变螺距螺杆的设计计算

为了使罐头包装机具有柔性加工的功能并提高设备利用率,根据圆柱形罐的螺杆供送机构的原理,设计开发了可调变螺距螺杆供送机构和对应不同罐径的系列变螺距螺杆。根据对罐的运动规律要求,给出了变螺距螺杆结构参数的设计计算方法以及罐的运动规律的计算分析方法。阐明了罐运动规律与螺杆长度、罐直径、螺距、螺距数之间的关系。研究的变螺距螺杆的设计计算及运动规律分析方法适合常用的罐径系列。     

混合现实虚拟智能教室的方案设计

为了实现在网络学习中,教师和学生能够有效地支持师生实时课堂交互,针对远程教育停留在Web课件浏览以及教师单向讲授的形式和阶段上,讲授形式和画面单一呆板,师生不能充分交流的问题,在分析网络教育存在的缺陷,以及思考网络学习中必须关注的几个问题的基础上,提出了一种新的远程教学互动及演示方式———混合现实虚拟智能教室系统.该系统是一个依靠交互空间技术和电视演播技术而开发的网络教学环境,在利用该系统进行教学时,网络学生可以用不同的接入方式加入该虚拟教室课堂,不仅可以通过多变的虚拟背景下教师的讲课视频接受到更多的感性认识;还可以通过语音、视频以及文本与教师进行直接对话,大大加强了网络学习过程中师生的沟通交流,打破了网络学习时学习者情感的缺失,从而使得教学效果能够加强.