基于FPGA的嵌入式WE B服务器的研究

介绍了WEB服务器和FPGA的NIOS Ⅱ软核处理器技术．提出了基于FPGA的嵌入式WEB服务器的实现方案。系统采用MicroC／OS-Ⅱ实时操作系统．移植LWIP协议栈．实现了提供静态和动态网页功能的嵌入式WEB服务器。     

一种基于FPGA和软核CPU的嵌入式系统设计方法

本文对一种基于FPGA和软核CPU的嵌入式系统设计的方法进行了描述,整个系统以FPGA和NIOS为中心进行设计,外围接口包括JTAG、串口、USB口等.系统选用ALTERA公司的Cyclone系列的芯片作为核心处理芯片,配合ALTERA公司推出的NIOS软核嵌入式处理器构成整个系统的核心.操作系统采用μC/OS嵌入式系统,并移植到FPGA平台上.     

基于以太网的数据采集在Xilinx FPGA上的实现

随着网络技术与可编程逻辑器件的飞速发展,使得实现时工业生产设备进行监测有了更快捷的设计方法和更直观的监控方式.本文在Xilinx公司的现场可编程门阵列FPGA上设计实现了基于以太网的嵌入式数据采集系统.主要阐述了硬件平台设计、嵌入式实时操作系统移植以及嵌入式WEB服务器的实现,同时详细给出了FPGA MicroBlaze IP软核的实现.     

基于WiFi的嵌入式WEB服务器设计

为了满足当前工业控制和数据采集的要求,通过比较常用的嵌入式服务器技术并分析嵌入式服务器的实现原理,设计了一种全新的基于WiFi的嵌入式WEB服务器。详细介绍了基于轻量级TCP/IP协议栈(LWIP)的嵌入式WEB服务器的设计方案,阐述了系统的软硬件设计。搭建了以WiFi为传输介质的无线通信系统、以NAND FLASH为存储介质的FATFS文件系统,及以SRAM存储器为外部RAM的内存系统的硬件体系。该嵌入式WEB服务器功耗低、成本低、实时性好、处理能力强。测试结果表明,该方案可行、实用,在搭建嵌入式WEB服务器方面有一定的推广性。     

基于NIOSⅡ软核处理器的嵌入式测试系统软硬件设计研究

介绍了利用NIOSⅡ软核处理器设计嵌入式测试系统的两类系统架构,详细讲述了基于NIOSⅡ软核处理器的嵌入式测试系统软硬件设计方法;最后结合EP2C8Q-208C8型FPGA芯片,利用Verilog语言描述A/D芯片的工作时序逻辑,利用NIOSⅡ软核处理器设计串口处理单元,将A/D采集的数据通过串口发送到计算机显示。实践表明,利用NIOS II软核处理器设计嵌入式测试系统,具有开发周期短,系统集成度高,功能灵活多样等特点,与传统利用单片机设计嵌入式测试系统相比,具有时钟频率高、运行速度快、调试方便等特点,是一种值得推广的嵌入式测试系统设计方法。     

TMS320C6201/6701 DSP处理器与FLASH存储器的接口设计

高性能DSP处理器与FLASH存储器的接口设计是开发基于TMS320C6000系列DSP的嵌入式实时系统的一项重要技术。以基于三个TMS320C6201/6701DSP芯片开发成功的嵌入式并行图像处理实时系统为例,介绍了高性能DSP处理器与FLASH存储器的接口设计技术以及引导程序的生成。     

嵌入式智能加药控制器的设计与实现

本文在提出了自来水厂的需要后.分析嵌入式WEB服务器原理的基础上,设计出一种基于Linux操作系统的嵌入式WEB服务器系统,给出其软硬件设计和一些关键的实现细节.然后将所设计的嵌入式WEB服务器应用到自来水厂智能加药控制器中,实现了其远程监控与智能加药.     

基于ARM-Linux的嵌入式WEB服务器

针对目前现场设备远程监控的需要,在分析嵌入式WEB服务器原理的基础上,讨论并提出一种实现远程设备监控的方法,设计出一种基于"ARM ARM-Linux"操作系统的嵌入式WEB服务器系统,给出其软硬件设计和一些关键的实现细节.同时,针对嵌入式设备的特点对TCP/IP协议族进行了裁剪,并依照裁剪后的协议,利用Socket编程和编写CGI程序最终完成了B/S模式下嵌入式WEB服务器的设计.最后将所设计的嵌入式WEB服务器应用到现场交流伺服远程监控系统中,实现了其远程监控与故障诊断.     

基于 NiosII 的音频信号分析仪设计

文中研究了一种基于傅立叶变换和 Nios 软核控制器的硬件音频信号分析方法,并构成一种音频信号分析仪.该仪器通过 Avalon-ST 总线有效的把 FFT IP 核与 Nios 软核处理器有机的结合起来,在 FPGA 芯片上配置 NiosII 软核处理器和相关的接口模块来实现嵌入式系统的主要硬件结构,该结构使得软件和硬件集成到一片可编程逻辑器件平台上,使设计同时获得软件的灵活性以及硬件的高性能优势.设计中,在 Altera EP2C35系列 FPGA 芯片中嵌入 NiosII 软核处理器,使之集成在一片 FPGA 上,开发效率高、灵活性强,能较好地满足的市场需求     

基于NiosⅡ的音频信号分析仪设计

文中研究了一种基于傅立叶变换和Nios软核控制器的硬件音频信号分析方法,并构成一种音频信号分析仪。该仪器通过Avalon—ST总线有效的把FFT IP核与Nios软核处理器有机的结合起来,在FPGA芯片上配置NiosⅡ软核处理器和相关的接口模块来实现嵌入式系统的主要硬件结构,该结构使得软件和硬件集成到一片可编程逻辑器件平台上,使设计同时获得软件的灵活性以及硬件的高性能优势。设计中,在AlteraEP2C35系列FPGA芯片中嵌入NiosⅡ软核处理器,使之集成在一片FPGA上,开发效率高、灵活性强,能较好地满足的市场需求。     

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。     

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。