车牌自动生产线网络控制系统设计

基于目前国内车牌半成品大多采用手工生产或单工位自动化生产的现状,设计出一种基于Profibus现场总线的车牌半成品自动生产线网络控制系统。此控制系统在国内首次实现了车牌半成品的全自动化生产,从根本上提高了生产效率与生产质量。在企业生产中成功应用验证了此控制系统具有很高的实用和推广价值。     

传输机械手在汽车座椅滑轨冲压线中的应用与研究

传输机械手在大型多工位生产线中至关重要。主要研究了汽车座椅滑轨冲压生产线中传输机械手的运动与电气控制,重点介绍了S7-300 PLC与安川伺服控制器的通讯连接以及相关硬件与软件的设计。传输机械手的应用,不但实现了滑轨冲压生产线的全自动化而且大幅度提高了生产节奏,变得更加柔性更加智能化。     

车牌自动生产线网络控制系统设计

基于目前国内车牌半成品大多采用手工生产或单工位自动化生产的现状,设计出一种基于Profibus现场总线的车牌半成品自动生产线网络控制系统.此控制系统在国内首次实现了车牌半成品的全自动化生产,从根本上提高了生产效率与生产质量.在企业生产中成功应用验证了此控制系统具有很高的实用和推广价值.     

基于虚拟仪器的PHS自动测试系统设计

设计并实现了基于虚拟仪器的PHS手机自动化测试系统;该系统采用基于PXI总线的在线测试技术、基于Web Service的分布式测试技术、基于Visual Studio.Net的集成化测试技术、基于统计过程控制和数据挖掘的智能化测试技术,完成了PHS手机生产线上的关键测试工位和测试项目的自动化测试,实现了与生产管理系统的企业应用集成和远程维护功能,提出了基于虚拟仪器的自动化测试方案,给出了自动化测试系统功能模块和进一步扩展的系统框架,满足了PHS手机大规模量产的需要.     

PLC在油泵支架产品检测中的应用

本介绍了哈飞Hafei、福特Ford、赛欧Sail等油泵支架自动化生产线产品检测工位5的基本结构，着重叙述了由日本松正（National)可编程逻辑控制器与各种仪器组成的控制和测试系统，并给出了设计实例。     

纺织布料自动搬运系统设计

针对纺织行业生产线各工位之间设备衔接仍处于半人工半自动化的现状，设计了一种面向纺织布料的自动化搬运系统。该设备使用PLC作为控制器，通过工业网络连接HMI组态设备、电磁阀通信模块的数据交换，对电机、真空组件、气缸的动作进行控制，完成对纺织布料的抓取、送料、放料等工作，可用于纺织机械工序之间的自动化衔接，为纺织行业的自动化发展提供可靠助力。     

考虑不确定生产因素的表面组装生产线负载平衡优化模型

针对表面组装生产中的不确定因素造成企业订单完成时间滞后问题,本文设计并实现了一种考虑不确定生产因素的生产线负载平衡优化模型.首先,以不确定生产因素的历史样本数据作为随机模拟样本预估出不确定生产因素对订单完成造成的滞后时间;其次,优化元器件贴装工位分配方案并以任务完成作为触发事件模拟生产线实际运行得到动态生产计划;再次,根据动态生产计划计算出模型适应度值后,采用遗传算法对模型适应度值进行启发式寻优获得最优动态生产方案.最后,利用表面组装生产线试例对该模型进行验证,结果表明,该模型可准确预测产线各时段的生产任务、任务量及各器件贴装工位,有效提高了企业生产效率.     

基于EVM的玻璃缺陷实时检测系统的软件设计

为实现玻璃原片的实时自动化检测,给浮法玻璃生产线上的优化切割系统和玻璃等级打标装置提供详实的数据,设计了一种基于SEED-Davinci_EVM开发板的玻璃缺陷实时检测系统,合理地分配和使用了ARM与DSP来完成各种功能,并采用基于图像灰度的识别算法设计了玻璃缺陷检测软件系统,实现了缺陷的实时自动化检测;实验结果表明,采用基于达芬奇技术的双核处理器有利于实时处理大量的图像数据,能满足自动化系统的检测要求.     

基于组态软件的混凝土预制板生产线监控系统设计

针对混凝土预制板生产线集中监控问题,设计了一套基于计算机组态软件和工业以太网的集中监控系统。分析了混凝土预制板生产工艺流程,研究了生产线的工位布局;采用计算机集中管理, PLC分散控制的方式构建了系统硬件架构;利用力控ForceControl组态软件进行开发,设计了多人机交互界面,并论述了采取的控制策略以及脚本程序的实现。经实践验证,系统运行稳定、灵活性好、实用性强,满足用户对生产线集中管理、监视及自动控制的需求。     

基于S7-400PLC的镀膜玻璃生产线控制系统

针对镀膜工程玻璃生产线工艺复杂,结构庞大,控制参数众多,镀膜过程控制要求响应快、精度高的特点,设计了以西门子S7-400PLC为核心的生产过程控制系统,结合系统结构与硬件配置方案;详细阐述了真空泵、磁控溅射靶阴极电源和玻璃传送伺服电机等子系统的控制策略和特点.给出玻璃长度计算方法和公式,以及位置控制程序流程框图,该系统采用2块独立工作的CPU模块,细化控制任务,提高了编程的灵活性和系统的可靠性.在WinCC组态软件平台上,设计了系统监控软件,上位机处理大量生产过程数据,归档重要参数,实现镀膜玻璃生产过程实时监控.控制系统在现场的成功应用表明,该系统结构合理,功能完善,控制效果好,满足了工程玻璃真空镀膜生产过程自动化的各项要求.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.