基于USB总线的数字电路板功能测试系统研究

本文提出了一种基于USB总线技术的数字电路板功能测试系统设计方案。本系统采用Cypress公司推出的EZ-USB单片机中的AN2131QC芯片作为USB接口控制芯片,采用了Lattice公司推出的ISP芯片作为系统核心控制部分。系统内部采用自定义总线结构,测试资源设计遵循模块化、标准化的设计思想,整个系统具有可靠性高、扩展灵活、测试性好等优点。     

基于PDIUSBD12芯片的USB接口设计

本文以Phillips公司的USB控制芯片PDIUSBD12为例,采用USB2.0协议,介绍了嵌入式系统USB接口的设计流程,重点讨论了USB外设控制器中固件的设计和用单片机实现USB高层通信协议。     

USB-GPIB控制器设计

阐述了基于USB总线的GPIB控制器的设计,利用USB控制芯片CY68013和GPIB NAT 9914芯片,实现了仪器的程控和通信.USB-GPIB控制器的研究成功对自动测试系统的组建具有十分重要的作用,简化了系统组建,并具有即插即用功能.     

USB2.0接口控制器的设计

介绍了一种专门针对优盘应用的USB2.0设备控制芯片的设计方法。着重说明了USB2.0设备控制器所要完成的功能和实现方案的模块构成,以及实现USB协议的处理流程以及USB设备控制器的设计要点。     

基于USB2.0的高速同步数据采集系统设计

介绍基于USB2.0协议、最多可四路同步采样的高速同步数据采集系统。其单通道采样速度620ksps,四通道同时采样速度可达180ksps。USB接口控制及通信芯片采用Cypress公司FX2系列中的CY7C68013,通过对其可编程接口控制逻辑的合理设计和芯片内部FIFO的有效运用,实现了数据的高速连续采样。     

基于USB接口485总线设备检测系统设计

本文介绍USB接口的485设备通信板卡和485设备检测软件的设计过程。板卡设计采用Cypress公司68013USB接口控制芯片,利用控制芯片的IO端口,通过FPGA芯片实现与485总线设备的通信。同时开发USB设备异步驱动,采用VC 开发环境,设计了485设备检测系统。     

一种ucLinux系统主机与控制板的USB通信设计

介绍了一种ucLinux主机与控制板的USB通行设计.ucLnux主机采用ARM处理器,USB控制板用Cypress公司的CY7C68013A芯片实现串行接口引擎和MCU控制,具有数据传输快,接口简单,扩展方便等优点.     

USB3.0的高速信息传输瓶颈研究

研究了USB3.0协议,包括其使用技术和优缺点,以及与USB2.0相比的优势,选用祥硕公司的USB3.0控制芯片AsMedia104X进行研究,在如何提高USB3.0实际传输速度上进行探讨,提出可实施性的解决方法.     

低功耗数据采集系统的USB接口设计

介绍低功耗数据采集系统的USB通信接口设计方法。该设计以超低功耗单片机MSP430F13X为主控制芯片,连接Cygnal公司的UART转USB芯片CP2101,实现低功耗数据采集系统的USB接口设计。在要IAREmbeddedWorkbench集成开发环境和VC 环境中,编辑单片机与主机的通信协议。该设计具有超低功耗、高集成度和设计简便等优点,适于便携式电子设备的开发应用。     

SEP6200平台上Linux内核的USB OTG驱动设计

为了满足两个USB设备之间直接进行数据通信的需求,通过对现有USB OTG协议和相关应用的研究,在国产SoC芯片SEP6200平台上设计并实现了基于Linux内核的USB OTG模块驱动。首先介绍了OTG标准中的对话请求协议(SRP)和主机交换协议(HNP),然后制定并设计了基于USB控制芯片USB3343的硬件模块方案,最后根据Linux内核中已有的USB驱动架构完成了USB OTG设备驱动的设计,并最终实现了SEP6200嵌入式平台USB Host和De-vice角色的自由转换功能。     

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.