某大型光机电设备分布式无线故障诊断装置的设计

为了满足某大型光机电设备状态监测与故障诊断的需要,设计了一套分布式无线接入故障诊断装置;从硬件和软件两方面介绍了数据采集、故障诊断以及装置的低功耗和抗干扰的设计方法;现场测试表明,该诊断装置对设备的状态监测与故障诊断有较好的准确性和实时性,并可代替实际设备进行辅助操作训练。     

高实时性的无人机飞控软件测试系统设计

机载计算机作为无人机系统的控制核心,在设计过程中对其进行性能监测及功能验证是保证其正常工作的基本途径;运行于机载计算机内的飞控软件已成为无人机飞控系统设计中最重要的因素之一,采用Labview和RTX搭配的建模方式,模拟无人机机载计算机的真实硬件环境,在Windows操作系统下构建一套高实时性的测试系统方案,完成对机载计算机飞控软件的实时监测评估和性能测试;经实际测试,该系统能够实现对无人机飞控软件的实时监测和测试,实时性带来的实时误差不超过1％.     

基于Zynq的高速数据记录仪的设计与实时性分析

为了在无人机飞行过程中实时监测并记录飞行数据,设计了数据记录仪,并对该数据记录仪的接口实时性进行了研究。根据实时性的分析结果,按照所需记录数据的速度和时间要求,FPGA设计中断方式和乒乓缓存,得到最优记录模式;软件根据记录数据的优先级进行处理,改进软件指令和中断处理方式,实际应用表明,优化后的图像数据搬移时间达到90us,同步串口是数据搬移时间达到740us,大大提高了实时性,同时减轻了CPU的负担,达到了无人机对数据记录仪的实时性要求。     

基于底层驱动的故障诊断软件设计

在Windows系统中,PCI/CPCI总线模块的故障诊断实时性较差。为此,提出一种基于底层驱动的故障诊断软件构建方法。将虚拟诊断驱动作为软件底层,使用DriverWorks的核心层类实现设备枚举、设备资源初始化等功能,通过状态寄存器实时监控设备的工作状态,结合中间件和应用软件完成对设备的故障诊断。实验结果表明,该软件运行稳定,实时性较好,且诊断功能可随意扩充。     

基于WindowsCE的嵌入式多生理参数采集显示系统

实现了一种能对多种生理参数进行实时检测、存储、分析、显示及报警的嵌入式系统,采用S3C2440作为核心控制器,使用CAN总线实时传递生理参数信号,用WindowsCE作为操作系统协调软件界面与硬件的运作;图形用户软件界面考虑到生理参数数据量大,实时性要求高的特点,利用自定义的消息方式和多线程技术充分提高程序的实时性和代码的执行效率;程序运用面向对象的思想,便于后续功能的开发;通过和高实时性的PC测试程序波形比较表明,本系统具有很强的实时性和稳定性,可以实现预期的监测功能。     

CSMWPCA方法及其在批过程故障诊断中的应用

鉴于传统的多向主元分析（MPCA）难以保证在线状态监测和故障诊断的实时性,提出了一种基于特征子空间的滑动窗主元分析（CSMWPCA）故障监测与诊断方法。在实时故障监测与诊断时,该方法采用适当大小的滑动窗逐步更新当前子数据空间,对当前子数据空间故障的识别通过依次计算其与基底库中各故障的匹配度来进行,克服了传统的MPCA不能处理非线性过程和实时性问题。与一种新的移动窗多向主元分析（MWMPCA）方法相比,CSMWPCA方法能更有效地识别故障发生的原因。     

基于 LoadRunner 的负载压力测试

LoadRunner 是一种能预测系统行为和性能的负载测试工具。通过以模拟成百上千的虚拟用户实施并发负载及实时性能监测的方式来确认和查找软件问题。对 LoadRunner 的工作和相关概念进行介绍，并结合实例介绍 LoadRunner 工具进行如何软件负载压力测试。     

基于TMS320F2812的采煤机电动机保护控制模块

为了对采煤机电动机进行有效的在线监测和故障早期诊断,设计了一种基于TMS320F2812的采煤机电动机保护控制模块,介绍了该模块的硬件电路和软件设计。该模块可以实时监测采煤机电动机的运行状态,实现过热、过载、短路、缺相保护功能;同时可对采煤机电动机运行电流谐波进行分析,实现定子、转子故障自诊断功能。井下试验结果表明,该模块可靠性高、实时性强。     

基于DSP的锅炉火焰温度场测量及燃烧诊断系统

针对电站锅炉火焰监视、温度场测量和燃烧诊断中存在的问题，提出了一种以DSP为核心的嵌入式图像火焰监测系统，在对彩色图像法测量温度场的原理论述的基础上，对图像采集和处理各部分的电路和系统软件进行了分析和说明。通过优化设计，使系统的数据处理能力和实时性得到大幅的提升。经过200MW机组的试验表明，系统能在1帧时间内完成一幅图像的处理与特征量的提取，在1s内完成锅炉燃烧状况的诊断，火焰监测和燃烧诊断实时性得到了保证。温度场测量最大偏差不会超过50℃，相对误差小于5%，能满足系统对测量精度的要求。     

复合海缆在线监测系统上位机软件设计

介绍一种基于布里渊光时域分析技术BOTDA(Brillouin Optical Time Domain Analysis)的复合海缆在线监测系统的上位机软件开发过程。对系统的基本原理进行简单介绍,对系统软件的结构、功能以及关键技术进行详细的阐述。其中,利用模块化设计思想确保了整个系统软件的维护性和扩展性;运用多线程技术提高了系统运行效率,实时性也具有可靠的保证。在渤海采油平台上的成功应用表明该系统软件可以实现对海缆分布式、实时的监测。     

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.