基于ARM和W5100的嵌入式以太网通信接口设计

设计了一种基于以太网控制器W5100和32bitARM微处理器STM32F105V的嵌入式以太网通信接口。介绍了W5100的工作原理、接口硬件设计及软件设计方案。硬件部分采用SPI总线接口模式实现STM32F105V与W5100连接,软件部分着重对网络控制器的4个独立端口编程,实现以太网数据快速收发功能。本接口设计可直接应用于工业数据采集系统开发。     

基于ARM的PROFIBUS-PA远程I/O从站设计

分析了总线远程I/O应用现状,提出以ARM为平台开发PROFIBUS-PA远程I/O从站设计思想。以AT91SAM7SE32为管控CPU,基于协议芯片DPC31和西门子公司的SIM1-2,给出其硬件设计方案。分析PA协议的层次结构,给出PA从站的软件组成。充分利用ARM的快速性实现了PA总线要求的高实时性、高可靠性。     

基于AT91SAM7A2的验证设备设计

设计了基于AT91SAM7A2芯片的列车辅助控制系统验证设备,提供了软硬件设计方案,上位机软件建立测试用例,激励/监控板产生实际的物理信号。借助软件测试中的正交试验等技术减少了测试用例的数量,加快了验证的过程。采用AT91SAM7A2处理芯片作为激励/监控板的主处理芯片,利用此芯片丰富的接口有效地产生和采集辅助系统的输入和输出信号。     

基于ARM嵌入式以太网接口设计与实现

本文介绍了一种嵌入式以太网接口的设计与实现,采用AT91RM9200微控制器与以太网控制芯片RTL8019AS进行硬件设计,详细阐述了RTL8019相关寄存器设置,给出了相关硬件连接图及软件的实现。     

基于现场总线的模糊控制系统

基于现场总线控制技术,介绍了模糊控制系统的设计方法。采用双单片机AT89S52与AT90S8515设计了基于PA总线接口的回转窑温度智能模糊测控系统。利用ASIC芯片SPC4、SIM1设计了Profibus-PA总线通信接口和回转窑温度检测接口硬件电路,给出了总线通信接口程序流程图。应用结果表明,系统通信可靠、控制效果好。     

基于ARM的全自动单纱强力机控制器设计

以ARM芯片AT91SAM7S64为核心构成的单纱强力机控制器的软硬件设计方法.AT91SAM7S64的PWM单元控制交流伺服驱动器驱动交流伺服电机实现纱线拉伸.采用高精度ADC采集纱线的拉力数据,内置的定时/计数器实时测试记录各种纱线的拉伸长度和断裂时间.文中对控制器硬件结构、软件流程作了较为详尽的阐述.经测试表明该控制器具有精确度高、性能稳定、成本低等优点.     

基于SPI总线的医疗仪器网络接口设计

本文给出了一种基于SPI总线的医疗仪器网络接口的设计方法.网络接口由PIC单片机和W5100网络芯片等组成.单片机为网络接口的控制核心,通过SPI总线接口W5100,W5100通过RJ-45接入网络,从而实现医疗仪器与网络的信息交换与控制;实验结果表明基于SPI总线和W5100的医疗仪器网络接口的硬件结构简单、性能稳定、兼容性强.     

W5100在FPGA系统中实现TCP／IP网络通信

介绍了W5100在现场可编程门阵列（FPGA）系统中实现TCP／IP网络通信的方法。描述了WS100的内部架构和寄存器设置,设计了一套基于直接总线接口模式的FPGA系统,系统主要由FPGA、W5100及网络接口组成。FPGA通过状态机状态控制W5100,实现传输控制协议（TCP）／互联网协议（IP）。     

一种简单高效的现场总线的设计与实现

提出了一种简单、高效的现场总线的设计方法,网络节点设计没有采用常规思路,而是由MCU直接控制总线接口,通过软件通信协议定义与硬件电路特点相结合来实现,从而在保证通信的高效性及可靠性的基础上使得MCU的负担最小.分析了总线接口芯片选择原则和总线冲突解决方案,给出了系统实现的硬件接口电路和软件实现详细框图.     

基于ARM的CIS系统高速数据采集实现

首先简单介绍了一些高速数据采集方法的优缺点。然后简单介绍了ATMEL公司生产的32位ARMRISC处理器AT91SAM7S64的结构与特点,并利用AT91SAM7S64的ADC和PDC实现90E卷接机组中CIS(烟支检测系统)的高速数据采集。给出了硬件连接图与相关的程序。     

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。