某型雷达模拟器PPI显示的设计与仿真

为了实现机载雷达训练模拟器人机交互界面,对雷达模拟器PPI显示进行设计.为了获取更逼真的实时显示,首先对雷达模拟器PPI显示的构成进行分析,设计字符显示模块和图形显示模块,然后介绍了模拟器中PPI显示的关键技术问题及解决途径,包括雷达点迹显示、杂波目标显示以及扇扫显示,采用颜色等级亮度不同来显示扫描更新的点迹,用具有某种特定概率密度和自相关函数产生随机数方法来近似仿真杂波目标显示.将改进方法应用于某型机载雷达训练模拟器中,取得了良好效果.     

基于自动化采集数据的设备运行管理系统设计与实现

本文介绍了如何从SCADA系统、DCS系统中组织、提取设备运行参数信息,如何采用ORACLE数据库来存储这些信息,以及如何对采集的数据进行管理.     

基于Visual C＋＋的雷达PPI显示仿真研究

本文结合用Visual C＋＋开发某P型雷达模拟器的实际，探讨了雷达PPI显示仿真中扫描线余辉的实现、目标回波的模拟显示、无闪烁刷新PPI显示器、多目标数据结构设计等关键技术问题。     

GIS技术在港航管理中的应用

文章讲述了GIS技术在港航管理中应用的必要性和可行性,以及全面介绍了福建省港航GIS系统的开发、设计、功能和运行情况。     

基于GIS及组态的煤矿监控系统设计实现

提出了利用工业组态软件实现煤矿井下安全监控,同时引入GIS,建立新型煤矿安全监控系统模型,并设计实现了基于该模型的实例MGIS系统,使煤矿监控软件与GIS相结合共享数据,从而充分利用监控软件获得的各类参数,实现实时监控数据转储,数据转换,GIS生产安全参数信息显示等功能.     

基于Qt的雷达显示及手机客户端设计

为了实现对雷达平面位置显示器(Plane Position Indicator,PPI)更加方便、快捷的控制,设计了一种基于Qt的雷达PPI显示及手机控制客户端。根据雷达PPI显控需求,在Windows系统下利用Qt图形框架设计雷达PPI显示端,并基于Qt on Android开发环境使用QML实现手机控制客户端的设计。雷达PPI显示端和手机客户端通过TCP/IP协议远程连接,实现手机客户端在以太网下对雷达PPI显示端的控制。该客户端实现了利用Android可移动设备对雷达PPI显示端的远程控制,扩展了雷达PPI显控系统在复杂环境下的适用性。测试表明,基于Qt的雷达PPI显控手机客户端可以方便、快捷地控制雷达PPI显示端,且软件运行稳定,满足性能需求。     

CENTUM CS 3000在聚乙烯中试装置的应用

介绍横河CENTUM CS 3000系统在聚乙烯中试装置的应用情况,重点阐述系统的基本构成、功能特点、主要控制程序模块的设计开发、与其他子系统设备的通信及应用效果等.     

基于单片机与PC机通信的数据采集控制系统设计

设计出基于单片机与PC机通信的数据采集控制系统方法。被控对象经传感器、电压变换电路、A/D转换芯片与单片机相连,可将现场参数信息传送至单片机;单片机经继电器驱动控制被控对象运行。单片机与PC机经电平转换芯片相连,实现远程通信功能。该系统可以实时采集被控对象多种参数信息并送PC机处理,可以选择由PC机远程或单片机本地控制被控对象。     

基于SharePoint的数字协同系统的研究与实现

以华南师范大学数字协同系统为研究对象,介绍了华南师范大学数字协同系统及其设计目标,构建了协同系统的体系架构及功能结构,分析了系统所采用的关键技术,最后使用SharePoint及Live Communications等平台实现了该系统。结果表明华南师范大学数字协同系统通过集成电子邮件、即时通讯、语音电话、移动通信等协同工具,给用户带来一个高效、无缝、协作的信息平台。     

一种冗余式导航分发设备设计

针对多个不同体制、工作方式的电子系统协同工作、信息融合的应用需求,设计了一种冗余式导航分发设备,通过对外部多个信息源提供的时间、导航及参数信息进行信息综合处理,为电子系统内的设备提供实时、统一的导航、时间和参数信息,应用情况表明,该设备实现了整个电子系统内部各设备间us级的信息同步。通过分析信息同步需求,采用冗余架构,使用FC时间同步服务实现精确对时功能,通过双冗余FC接口实现时间、导航及参数信息的分发,并提供秒脉冲等时间基准信号,由各电子系统内部的时间处理单元实现电子系统与本设备之间的时间同步功能。     

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.