基于CS8900A以太网驱动程序的设计

设备驱动是Linux系统的重要组成部分,它在硬件和终端之间建立了标准的接口.本文首先介绍了嵌入式系统的概念以及嵌入式Linux,并建立基于嵌入式ARM-Linux平台.籍此平台,并通过嵌入式Linux的基础、嵌入式Linux的网络结构和网络驱动程序的实现方法的研究,最后成功的实现了基于ARM9的嵌入式Linux下以太网驱动程序的开发.     

基于QT4.7的ARM嵌入式Linux的游戏程序开发实现

在嵌入式系统中,ARM处理器与嵌入式Linux操作系统结合得愈加紧密,并广泛应用于社会的各行各业。同时,面对人机交互效率的需求不断提高,越来越多的嵌入式设备开始采用较为复杂的GUI系统,在此过程中QT得到了广泛的应用。本文通过介绍五子棋游戏开发,可以使读者了解基于QT4.7的ARM嵌入式Linux的应用程序开发实现过程。     

基于CAN总线和MiniGUI的虚拟仪表设计

基于ARM+Linux的架构,通过CAN总线获得数据,再利用嵌入式系统平台的构建思想,实现了在嵌入式Linux操作系统下,基于ARM和MiniGUI环境的车载信息的图形化显示。介绍了虚拟仪表系统的体系结构、数据采集节点的构成及Linux环境下CAN总线驱动程序的实现。     

基于PXA255的ARM Linux操作系统移植

Linux在嵌入式领域中应用越来越广泛,已成为最有潜力的嵌入式操作系统。操作系统的移植是进行嵌入式应用开发的前提和基础。ARM Linux是一种针对ARM体系结构的Linux操作系统。本文以新一代高端嵌入式处理器PXA255为例,进行ARM Linux的移植,阐述了移植中需要解决的关键技术,包括:内核的定制、文件系统的创建、设备驱动的移植等。最后,在移植成功的平台上实现了无线接入点。     

基于ARM的Linux网络设备驱动程序开发

对基于ARM的网络设备驱动程序开发进行了研究,分析了嵌入式Linux网络设备驱动程序的实现原理和运行过程,讲述了嵌入式系统中网络设备驱动开发的具体过程.在嵌入式Linux中实现DM9000网卡驱动,并结合实现DM9000网卡驱动的实例讲解了基于Linux操作系统的网卡驱动程序开发流程.具体分析了网络设备的初始化、设备的打开与关闭、数据的传送和接收以及超时处理等相关过程.最后归纳总结了基于嵌入式Linux网络设备驱动程序的一般方法.     

基于ARM LINUX的嵌入式GUI的设计与开发

GUI设计在嵌入式系统设计中占据着举足轻重的地位,MiniGUI为一种适合于嵌入式系统的、功能强大的GUI,本文介绍了基于ARM和Linux的MiniGUI移植方法以及在ARM开发板上实现普通手机操作界面的设计过程,并提出了相应功能的实现方法,给出了设计的效果。     

Java Web应用在ARM Linux平台上的实现

首先完成了java虚拟机jamvm,java web容器winstone和嵌入式数据库sqlite以及jdbc驱动程序Sqlitejdbc在ARM Linux平台上移植配置,并在移植配置好的平台上成功运行jsp、servlet程序和做了访问sqlite数据库的测试。完整地实现了在嵌入式ARM Linux平台上支持java,jsp,servlet和数据库等java web应用。     

SQLiteODBC接口在ARM—Linux平台的实现

文章主要讨论了在嵌入式Linux系统下用ODBC接口访问嵌入式数据库SQLite的实现方法。论述了开放源代码的SQLite数据库、unixODBC驱动管理程序和sqliteodbc驱动程序在ARM—Linux平台的移植,并给出了SQLiteODBC接口的测试程序。     

基于ARM9的嵌入式网络接口设计

介绍了一种基于嵌入式系统的网络通讯的设计方案。在嵌入式ARM9嵌入式网络通讯设计中,介绍了ARM9200T等硬件和Linux操作系统,通过网络接口与服务器进行连接,并通过TCP/UDP协议进行通讯。     

基于ARM＋Linux的高速数据采集系统

文章结合某化工厂的实际需求,设计出了结合Linux的嵌入式微处理器ARM高速数据采集系统,并着重阐述了在ARM和Linux操作系统上,选用ARM920T架构的S3C2410处理器,结合128MBSDRAM和256MBFLASH进行的系统设计,详细讨论了目标系统实现的关键设计。     

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.