嵌入式Linux下步进电机驱动开发

为了实现在嵌入式系统中对步进电机进行控制且尽可能少占系统资源,现基于嵌入式处理器S3C2410和Linux系统进行步进电机驱动开发,包括相关硬件体系结构和软件系统组成及测试固化方法.实现了动态编译下步进电机驱动的开发及电机控制.阐述了在Linux系统下驱动程序的设计流程和内核模块化编程思想,驱动程序模块化并在需要的时候加载到内核是节省嵌入式硬件资源的主要方法之一.为一般嵌入式系统下编写驱动程序步骤提供参考.     

嵌入式Linux字符设备驱动的设计与应用

描述了基于嵌入式Linux的字符设备驱动程序的设计方法和实现过程。以电机、数码管、串口和mini键盘的驱动设计为例,详细阐述了嵌入式linux下字符设备驱动设计中的关键技术,包括设备的设备号、设备的操作及设备的注册和卸载等。通过编写相应硬件设备的应用程序,测试设备驱动的正确性。介绍了Troolltech公司开发的开源图形用户界面库-Qt,并使用Qt编程方法设计出良好的人机交互界面。试验结果表明设计的驱动程序完全正确,可以被应用程序使用。     

LinuxPDA的SD／MMC卡驱动程序研究与设计

本论文主要目的是通过对嵌入式Linux软件开发环境、配置方法和硬件驱动程序设计方法的研究,分析操作系统的内核和驱动程序的结构,参考三星公司的SD/MMC驱动和斯道开发板的开发说明书,总结出一套嵌入式Linux的MMC卡开发环境的构建方法,定制设计适合ARM9芯片的S3C2410处理器的Linux PDA的MMC和SD存储卡驱动程序。     

NI LabVIEW嵌入式设计平台现应用于ADI Blackfin处理器的开发LabVIEW为嵌入式开发的领域专家提供图形化设计工具

美国国家仪器有限公司(National Instruments,简称NI)与Analog Devices Inc.(ADI)联合发布专用于ADI Blackfin处理器的NI LabVIEW嵌入式模块,将LabVIEW图形化数据流的开发环境扩展到高性能、低功耗的Blackfin处理器,进行快速的嵌入式系统开发。通过这一专用的图形化开发平台,ADI和NI为业界推出这一现成即用、集成的解决方案,帮助没有嵌入式编程经验的领域专家克服嵌入式开发过程中遇到的传统挑战,快速完成复杂应用的开发。有了专用于ADI Blackfin处理器的NI LabVIEW嵌入式模块,领域专家们就可以在同一平台上完成算法设计…     

嵌入式自动指纹识别系统设计

设计了一款基于嵌入式技术的自动指纹识别系统(AFIS),系统的硬件采用TCS316指纹识别模块和基于S3C2440 ARM9处理器的嵌入式mini2440 ARM平台,基于上述硬件开发了自动指纹识别软件,软件设计基于嵌入式Linux操作系统,采用模块化编程。所设计的指纹识别系统实现了指纹录入、搜索、比对、删除及指纹库清空等功能,并结合在考勤方面的应用,设计了基于Linux的QT触摸屏应用界面。实验结果表明系统的硬件和软件都能较好的工作,达到了预期的目的。     

嵌入式音频系统的设计与实现

音频系统在嵌入式多媒体系统中占有很重要的地位。主要是利用双核心的Blackfin 561处理器的特点,设计了一种适合于此处理器的音频系统硬件解决方案。同时结合对嵌入式音频系统主要问题的分析,得到了一种针对此硬件架构的软件整体解决方案。在软件方面通过设置合理的缓冲区以及采取静音检测、同步等措施,实现了该应用在嵌入式μCLinux系统下的驱动程序,为嵌入式μCLinux系统下的芯片驱动开发提供了很好的借鉴。     

嵌入式Linux2.6内核的CAN驱动设计与实现

为实现CAN总线设备在嵌入式Linux2.6.24内核下使用,提出了一种基于嵌入式Linux2.6.24内核的CAN总线驱动设计方案并赋予实现.由于嵌入式处理器S3C2410通过SPI总线完成与CAN控制器的硬件连接,利用嵌入式Linux2.6.24内核自带的SPI总线驱动中的函数完成CAN总线字符驱动设计,详细说明了在嵌入式Linux2.6.24内核下加载和声明SPI总线的具体步骤、CAN总线驱动初始化和中断控制的设计方法以及CAN驱动加载步骤.最后通过实例验证了CAN总线驱动设计的正确性.     

嵌入式Linux操作系统中数据采集程序设计

介绍了嵌入式Linux操作系统下,智能仪表数据采集服务器应用程序的设计思路,并详细阐述了嵌入式Linux下的串口通讯、网络编程、Modbus TCP协议驱动的实现方法.     

一个基于嵌入式Linux驱动程序设计的实践教学案例

为了使学生对嵌入式驱动程序开发有初步认知,结合嵌入式系统实验平台,设计基于嵌入式Linux驱动程序设计的实践教学案例。该案例以设备驱动程序设计为目标,基于S3C6410嵌入式微处理器硬件平台,涵盖开发环境的搭建、Linux内核的定制、根文件系统的制作、设备驱动程序设计、测试应用程序设计等教学内容。实施效果表明,该实践教学环节可以强化学生对Linux设备驱动程序设计的理解、提高学生的嵌入式底层软件开发能力。     

基于ARM9内核和嵌入式Linux的网络投影机系统设计

对嵌入式系统的基本概念、原理和基于ARM的嵌入式Linux应用系统的设计与开发作了介绍;设计开发了一套用于投影机的嵌入式远程监控系统,利用Internet,通过对底层设备驱动编程和上层软件系统的设计开发,客户端可通过浏览器访问嵌入式系统内置的http服务器,将投影机的相关参数直观实时地在Web页面上显示出来,并且可以实现对于投影机现场相关显示参数的设置.     

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.