新一代装备的预测与健康状态管理技术

预测和健康状态管理（PHM）技术是一种先进测试、维修技术,更是一种全面的故障检测、隔离和预测及状态管理技术。PHM技术正在成为新一代武器装备设计和使用中的一个重要组成部分。论文首先综述了PHM技术的内涵、功能、结构和工作原理,并对PHM技术涉及到的关键技术进行了详细的介绍,然后介绍了PHM技术的应用现状,最后展望了该技术的发展趋势以及对我国国防工业的借鉴意义。     

基于马尔可夫过程的健康状态评估模型

故障预测与健康管理（PHM）的思想是通过状态监测和诊断技术获取装备状态和故障信息,预测其故障发展趋势,采取更有针对性的维修措施,从而大大提高装备维修管理的精确化。对装备系统的健康状态进行评估是实施PHM的基础,研究了基于马尔可夫过程的健康评估问题,运用马尔可夫模型方法,将部件系统退化过程描述为有限状态转移过程,建立了基于马尔可夫的健康状态评估模型,对PHM系统进行评估并对剩余寿命进行预测,最后进行了案例分析,验证了模型的可行性。     

对发展故障预测和健康管理技术的探讨

故障预测与健康管理(PHM)系统对于推动装备视情维修能力的实现具有重大的意义。简要介绍了PHM的概念及其内涵,分析了国内外PHM技术的发展状况,论述了PHM技术发展过程中需要关注的主要问题,以及需要重视的几项工作。希望对装备PHM技术发展发挥一定的参考作用。     

基于PHM的供配电系统故障预测关键技术研究

PHM(故障预测与健康管理)技术是比传统的故障诊断技术更高级的故障诊断、预测和健康管理技术,如何将该项技术在供配电系统中有效推广及应用已成为当前迫切研究的课题。在供配电系统中应用PHM需要解决的关键技术是状态监测与健康管理、故障诊断、故障预测、数据融合和人工智能技术,重点分析了状态监测与健康管理、故障诊断和预测技术及其实现方法。     

PHM与保障信息系统信息集成使用方法研究

为了满足飞机保障向基于状态维修转变的需要,分析预测与健康管理PHM(Prognostics and Health Management)系统及保障信息系统的主要功能和系统组成,依据PHM信息集成使用的相关需求,提出PHM信息集成使用过程。对PHM与保障信息系统的接口信息内容,信息传递方式、接口通信类型和信息集成使用的交互步骤等进行深入研究。研究结果为实现由PHM使用的飞机主动式自主保障提供了信息集成使用的技术方法。     

无人机PHM系统体系结构设计研究

针对状态预测与健康管理(PHM)技术在无人机领域的应用需求,文章参考国内外PHM技术研究成果和应用经验,结合我国无人机保障现状,分析了无人机PHM系统的功能需求,研究设计了无人机PHM系统的体系结构,并详细介绍了该系统的工作流程,为无人机综合保障水平的提高提供了有益指导和参考。     

国外综合诊断、预测与健康管理技术的发展及应用

随着系统复杂性、综合化、智能化程度的不断增加,系统的"五性"和寿命周期费用问题越来越受到人们的重视;近10年来,综合的故障诊断、预测与健康管理(PHM)技术已经作为欧美等国提高复杂系统"五性"和降低系统寿命周期费用的关键使能技术L回顾了PHM技术的发展演变过程,重点介绍了PHM技术在国外军事、民用和学术研究领域的应用现状,并给出了PHM在F—35战斗机上的典型应用案例,最后探讨了PHM技术的发展趋势。     

故障预测与健康状态管理技术综述

故障预测和健康状态管理(PHM)技术是新一代武器系统的先进测试、维修和管理技术,也是一种全面的故障检测、隔离和预测及状态管理技术,正在成为新一代武器系统设计和使用中的一个重要组成部分;论文首先综述了PHM技术的内涵、工作原理以及该技术的功能与作用,然后对PHM技术涉及到的关键技术进行了详细的介绍,最后展望了该技术的发展趋势以及对我国国防工业的借鉴意义。     

预测与健康管理技术的发展及应用

回顾了故障诊断、预测与健康管理(PHM)技术的发展演变历程,考察了PHM技术在国外军事、民用和学术研究领域的应用现状,最后展望了PHM技术的未来发展方向.     

航空发动机PHM中的数据挖掘机遇与挑战

预测与健康管理(PHM)是未来先进航空发动机确保飞行安全、实现二级视情维修的关键使能技术。数据挖掘是PHM实现发动机健康状态评估、诊断以及剩余寿命预测的核心技术。本文首先从军事需求入手,简要分析了PHM技术的作用和意义,阐述了数据挖掘在PHM技术中发挥的重要作用,简要分析了国内外在航空发动机PHM中数据挖掘的差距。接着,详细分析了在航空发动机PHM技术中的关键数据挖掘问题,指出了数据挖掘问题的难点和技术挑战。最后,提出了集计算机、航空宇航两大学科之力推动发动机PHM技术成熟的建议。     

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。