基于网络化管理的报警主机系统设计

设计了一种高性价比的报警主机系统,该系统引入虚拟键盘和控制台PC机,实现了对接入以太网的报警主机系统的网络化控制.详细介绍了该系统硬件软件的实现方案,提出了报警主机与虚拟键盘的通信协议以及采用非完全TCP/IP协议栈时的网络故障恢复机制.实践表明,该系统运行稳定,具有较强的抗网络干扰能力,达到了网络化管理报警主机系统的设计目标.     

基于Vega的桌面虚拟场景应用研究

桌面虚拟场景是视景仿真的一个重要方面。通过在Vega软件环境下的一个桌面虚拟仿真,讨论了在PC上建立仿真应用程序一般的创建流程和实现该场景主要采用的细节层次优化技术(LOD),并对仿真结果进行了分析。仿真结果表明,该场景系统可以流畅地运行于一般PC上,说明了在一般PC机上利用以LOD为主的优化技术可以有效解决较大数据量与PC机资源紧张的矛盾。     

流体参数的网络化虚拟测试技术

文章针对流体设备运行参数测试的特点，提出了一种网络化虚拟测试流体设备运行参数的方法。软件部分采用工程中面向数据流的分析与设计方法，以及模块独立设计的原则。硬件部分采用单片机加存储器技术，与PC机通过串口和MODEN进行通讯。用现有电话线网进行网络化远程通讯。该系统实现了流体参数的网络化虚拟测试。最后，给出了某流体系统实测数据的运行结果。     

基于OpenGC的虚拟仪表系统设计与实现

基于OpenGC,以VisualStudio2005为开发平台,实现了以太网环境下运行于普通PC机的虚拟2D仪表系统,给出了系统的解决方案和软件框架,并简要阐述了系统中数据通讯、告警逻辑和仪表表示等关键模块。系统成功应用于某型飞机液压起落架在线仿真系统,取得了逼真的模拟效果。是一种实时’陛、可扩展性和可移植性良好的廉价的虚拟仪表系统解决方案。     

虚拟培训中的虚实联动技术

针对传统培训方式的不足,提出了虚实联动的培训方式.通过构建虚拟设备,硬件可编程逻辑控制器(PLC)、PC、虚拟设备三者之间的通信,实现虚拟设备和实体设备之间的联系,并且通过现场控制系统采集实体设备运行数据,将实体设备运行和故障等信息在虚拟设备中实时表现出来,拓展了虚拟培训的新思路.以喷印机虚拟联动系统为例论述了虚拟联动技术的必要性和可行性.     

串行扩展应用平台设计

介绍一种用于系统内芯片级串行扩展的应用研发平台。该平台包括PC机构成的上位机和单片机构成的下位机。上位机提供了良好的人机交互界面;下位机采用虚拟器件、虚拟接口,通过单片机软件和I/O口线模拟出多种串行接口的访问时序逻辑。借助这一平台,可方便地实现对具有I2C、SPI、Microware、One-wire等接口的从器件芯片的操作,简化了系统设计前的测试工作。     

基于Proteus虚拟环境单片机与PC串口通信

Proteus虚拟环境提供的COMPIM组件,可用来设置单片机串口通信协议,使虚拟环境与实际PC通信成为可能。对于没有物理串口的PC机,可借助VSPD虚拟串口软件构建PC虚拟串口,仅用一台PC机就可实现单片机系统与PC串口通信。根据单片机串口通信的特点,提出了单片机与PC串口通信的结构模型,即应用层、数据链路层和物理层三层结构,探讨了串口通信结构模型与通信方式之间的关系。在Proteus环境中以虚拟串口为例,设计了硬件电路和通信程序、给出了串口通信程序流程图,在一台PC机上实现了单片机与PC串口通信。     

PC虚拟化利弊

虚拟PC可能让网络管理更加容易,但其仍然存在缺点。服务器和存储虚拟已经是很成熟的技术,但PC虚拟是一匹黑马,对于终端用户来说,PC虚拟还不是一种可以立即使用的技术。PC虚拟是指在一台物理计算机上同时运行多个虚拟的PC,每个PC都有自己的操作系统。英特尔目前开发出了Vanderpool虚拟机技术,AMD也拥有Pacifica虚拟技术。这两种技术都是基于双芯或者多芯处理器。它们都能够同时运行Windows、Linux、Unix或者Solaris操作系统,每个系统占用单独的处理器、内存及硬盘空间。那些希望测试新硬件或软件的开发人员将很快意识到PC虚拟技术…     

基于PC机的虚拟装配的研究与实现

结合某高校PC机在组装过程中遇到的实际问题,开发了一套基于PC机的虚拟装配系统,提出了虚拟装配系统功能,对虚拟装配若干技术一算法、建模技术、控制按钮设计技术等进行了研究并给出了解决方案.在系统界面的设计中,讨论了主页面的划分及各个框架的作用.提出的理论和算法可应用到远程培训的教学活动中.     

通用数据采集系统的时基自动校准

在PC机或兼容机上,采用软件实现时基的自动校准的方法.该方法简单易行,解决了在DOS运行程序的软件定时和自动校准问题.     

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     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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。