内嵌8051的USB 2.0设备控制器IP设计

基于USB 2.0协议规范提出了一个USB 2.0设备控制器串行接口引擎SIE的IP核的设计,并内嵌8051软核作为其微控制器进行SoC设计。所设计的SIE核在FPGA开发板上经过验证。     

基于WISHBONE片上总线的USB2．0设备控制器IP核的设计

随着SOC技术的广泛发展和USB协议的普遍应用,在芯片设计时嵌入USB设备控制器IP核变得越来越重要.WISHBONE片上总线为IP核的相互通信提供了一种更为简单灵活的实现方法.本文基于WISHBONE片上总线,设计了符合USB 2.0协议的设备控制器IP软核,并通过仿真验证,符合设备使用要求.     

USB设备控制器IP核系统设计及FPGA实现

本文针对USB设备单芯片设计方法,介绍一种USB设备控制器IP核系统的设计,提出SIE核心控制流程,能满足设备控制器最大限度精简指令,同时对USB设备控制器如何屏蔽USB协议做了部分探讨,并简述了FPGA验证。     

USB2.0设备控制器中工作模式控制电路设计

基于USB2.0协议设计一款USB2.0设备控制器IP核,实现工作模式控制、数据包处理、事务处理、设备枚举控制。介绍了工作模式电路的设计,实现对USB2.0设备的复位检测、高速握手以及工作在全速模式、高速模式、挂起、挂起唤醒情况下的控制。     

USB2．0设备控制器IP核的设计与实现

USB2.0接口以其速度快、功耗低、使用方便,为PC外设中的大容量存储设备提供了很好的支持,出现了一系列的便携式大容量存储设备;文中针对大容量存储设备高速数据传输要求,根据USB2.0协议规范.利用VHDL语言设计实现了一种USB2.0设备控制器的IP核,为高速USB设备的开发打下了基础,可以用于SOC集成中。     

USB3.O协议分析与框架设计

随着科技的发展,最高传输速度为480Mbps的USB2.0已不能满足数据传输的需求;于是5Gbps的USB3.0应运而生;文中在详细分析了USB3.0协议的基础上,完成了USB3.0 IP核的框架设计;该IP核框架符合协议要求,实现了协议的基本功能;该IP核架构有助于学习和理解USB3.0协议,完成了USB3.0 IP核的VHDL代码实现阶段之前的协议分析与研究工作,对后期工作有指导作用.     

USB1.1设备控制器IP核的设计与实现

针对安全USB设备与PC主机数据通信的需要,依据USB1.1标准规范,文章设计一种USB1.1设备控制器IP核.该控制器IP核支持全速模式下控制、批量、中断三种传输方式,且传输端点数可配置.基于FPGA平台,对控制器IP核进行了实现,并在8051的配合下对实现进行了测试.测试结果表明其与主机之间的数据通信是可行的,可应用于SoC集成设计,为密码安全USB设备的开发奠定了基础.     

无MCU的USB2.0设备控制器IP设计与验证

实现了一种无需MCU的USB2.0设备控制器IP核.使用硬件电路代替传统单片机实现的MCU和固件功能,支持高速(480 Mb/s)和全速(12 Mb/s)传输.所设计的IP核在FPGA上经过了验证,结果表明它可以作为独立的模块用于SoC系统中.     

USB2．0-ATA桥接器IP核设计

USB2.0为PC外设中的大容量存储设备提供了很好的支持,出现了一系列的便携式大容量存储设备.大容量存储设备遵循不同于USB2.0协议的ATA协议,因此需要在两个总线之间设计一个USB2.0-ATA桥接器来进行指令翻译和数据管理.本文设计了一种USB2.0-ATA桥接器IP核,为内嵌ATA接口的USB设备开发打下基础,并可用于SOC的集成中.     

MCU&USB设备控制器IP核的设计

用硬件描述语言verilog HDL设计实现了一种MCU&USB设备控制器IP核.论文首先简要介绍了设计的背景,重点时自主研发的将MCU & USB控制器集成于一个芯片的设计和研究分析.最后给出nc-verilog功能仿真方案以及FPGA验证方案.使用上华0.35um工艺,流片成功,结果表明此IP核完全符合设计要求.     

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.