基于CPLD扩展的嵌入式织机监控系统设计

分析了织机控制技术现状,提出了CPLD扩展的嵌入式织机监控系统设计方案.硬件部分完成CPLD+ARM9硬件平台设计,给出了CPLD开发板电路及CPLD功能电路的详细设计;阐述了系统软件设计,包括织机控制终端主程序流程、织机管理终端程序设计.系统硬件调试正常,并给出软件运行效果图,系统完成了高速织机实时控制及远程监控,实...     

一种航空直流固态功率控制器的设计

提出了一种基于嵌入式实时操作系统μC/OS-Ⅱ和CPLD的SSPC设计方案.对整个系统的结构进行了分析,结合分析给出了系统硬件和软件设计方案.硬件设计部分给出了系统的硬件结构原理图,分析了系统性能和各部分功能,并绘出了子系统的设计;软件部分根据μC/OS-Ⅱ系统建立了任务结构框图和系统流程,给出了I2T反时限保护的一种算法,并通过对CPLD的编程实现SSPC的短路保护功能;实验证明这种设计方案具有硬件电路设计简单、实时性好、可靠性高和智能化水平高的优点,符合航空直流固态功率控制器的设计要求.     

EDA技术在数字系统设计分析中的应用

介绍EDA技术的特点,发展历程和发展趋势,以MAX+plusII开发系统为平台,以高密度可编程逻辑芯片CPLD为设计载体,采用层次化的设计方法,设计一个交通信号控制电路,从中可体现出数字系统的硬件设计向软件化方向发展的新思路。     

一种高档FPGA可重构配置方法

在多模式导航接收机中,FPGA可重构技术能将硬件资源进行时分复用,从而大大降低系统的复杂性和成本.在对高档FPGA可重构技术深入研究的基础上,设计了用CPLD FLASH对FPGA进行重构配置的硬件电路,给出了对CPLD进行硬件描述的Verilog HDL程序,结果表明该方法是可行的.     

基于DSP及CPLD的掘进机控制系统设计

提出了一种基于DSP及CPLD的掘进机控制系统设计方案,介绍了系统总体设计、CPLD数据采集模块及CPLD逻辑控制模块的设计。该系统采用CPLD实现数据采集,在AD采样环节节省DSP等待时间12μs,25路模拟信号每个采样周期节省300μs;采用CPLD代替标准逻辑器件实现各种逻辑功能,简化了硬件电路的设计,提高了控制系统集成度。实际应用表明,该系统能够满足掘进机正常生产的要求,具有较强的实时性和较高的可靠性。     

基于CPLD的频率键控系统设计的研究

现代通信系统要求通信距离远、通信容量大、传输质量好.作为其关键技术之一的调制解调技术一直是人们研究的一个重要方向.本论文主要讨论和仿真了基于CPLD的FSK、4FSK系统单元设计,并对调制解调系统和CPLD设计方法进行了相关的研究.以VHDL作为设计的硬件描述语言,在Altera公司的Maxplus2开发平台上进行了程序设计及波形仿真.对各个模块进行CPLD的建模,然后对各个模块的设计内容进行了层层细化,最终达到模块的具体软硬件实现.     

一种纸币识别系统的设计

介绍了一种纸币识别系统的硬件设计和对应的识别方法。在硬件设计上,将高速数字信号处理（DSP）技术与复杂可编程逻辑器件（CPLD）和线阵型图像传感器（CCD）相结合;在识别方法上,应用图像处理技术与改进的SOFM神经网络方法识别纸币。实验证明,此系统达到了高速、实时、识别率高的要求。     

适用于多梯群控系统的主控制器设计与实现

本文介绍了一种基于DSP TMS320LF2407A的新型电梯群控系统主控制器的设计.其中该系统采用分布式多路CAN总线网络结构,主控制器扩展了三路独立的CAN网络接口,并扩展有USB、以太网口等.该控制器采用的是DSP+CPLD的核心架构.DSP技术和CPLD技术有效的结合,实现了系统的硬件设计和修改软件化,提高了系统的运行速度和可靠性.     

适用于多梯群控系统的主控制器设计与实现

本文介绍了一种基于DSPTMS320LF2407A的新型电梯群控系统主控制器的设计。其中该系统采用分布式多路CAN总线网络结构,主控制器扩展了三路独立的CAN网络接口,并扩展有USB、以太网口等。该控制器采用的是DSP CPLD的核心架构。DSP技术和CPLD技术有效的结合,实现了系统的硬件设计和修改软件化,提高了系统的运行速度和可靠性。     

基于STC单片机与CPLD控制的多功能电子台历（硬件）的设计

本设计是一款基于STC单片机与CPLD控制的多功能电子台历。该系统采用了CPLD译码锁存技术,结合了LCD液晶显示技术、语音播报技术、温度采集技术和键盘技术,使该系统除具备传统的时间显示和调整功能外,还兼备了语音报时、温度测量和记事簿的功能。本文主要从硬件上实现各种技术的融合,同时也提出了软件设计的思想。     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。