维修性分配工具与PDM系统的集成技术研究

针对装备研制阶段维修性分配工具在使用过程中的数据互用性差、工作效率低的问题,分析了并行设计环境下维修性分配活动相关信息的逻辑分类,提出了维修性分配工具与产品数据管理(PDM)系统的通用集成方案,实现了维修性分配信息的获取、处理和传递,并选取Teamcenter系统和MAP 2.0维修性分配工具完成了系统集成的实例验证,并对数据接口的设计实现和关键技术进行了探讨.     

面向RMTSS综合设计的PDM系统集成技术

建立可靠性、维修性、测试性、保障性、安全性(RMTSS)综合设计平台是提高装备RMTSS特性的必要保证.首先构建了基于PDM的RMTSS综合设计平台框架,并且重点对当前PDM系统集成技术(信息建模和接口集成)进行了适用性分析;然后针对其重用性差的不足,提出了基于模型驱动体系结构(model driven architecture,MDA)的信息建模技术和基于组件的接口集成技术.前者将MDA技术运用到PDM信息建模过程中,根据业务需求,利用UML建立独立于PDM的中性信息模型;当针对某PDM集成时,只需少量改动即可利用MDA工具将其转化为适合该PDM的信息模型.后者依据标准PDM集成规范.运用组件技术构建了集成组件的标准接口,并结合某PDM的API给出了接口实现的实例.最后以2个可靠性CAD的集成为例验证了上述技术的实用性.     

产品数据管理系统的应用集成技术研究

针对当前工程机械设计和企业信息管理过程中存在的数据类型多、数据信息量大等问题,研究了PDM的应用集成的体系结构,构建了PDM与CAD/CAPP/CAM的集成框架,提供了基于PDM的企业全局信息集成框架,实现了应用工具与底层数据环境的系统集成和系统的无缝连接。     

基于PLM的产品维修性设计分析管理解决方案

探讨了维修性设计分析的信息需求,建立了维修性设计分析的ER模型,在此基础上重点讨论了PLM平台下开展维修性设计分析活动的解决方案,主要包括四个方面:在PLM平台下配置维修性设计分析环境;建立基于产品结构树的维修性信息主模型;维修性设计分析工具与PLM平台的集成;基于PLM项目协同和工作流对维修性设计分析流程进行管理和控制.最后选取典型的PLM平台Teamcenter系统,以某型舰炮研制阶段的维修性设计分析活动为例进行了应用研究.     

浅议PDM环境下维修性信息模型的构建

该文根据产品数据管理(PDM)技术的特点,在产品信息模型的基础上,分析了维修性信息的构成与分类,采用面向对象技术初步建立了基于PDM环境的产品维修性信息模型,并简要阐述了建立这种信息模型的现实意义。     

SolidWorks与PDM集成模式研究

本文基于SolidWorks三维CAD系统与产品数据管理系统(PDM)的集成需求,阐述了系统集成在6个方面的技术需求:协同设计、设计过程控制、完整的设计BOM提取、设计库管理、集成效率及扩展运用。通过技术需求梳理及SolidWorks与SolidWorks Enterprise PDM集成最佳实践案例,为企业更好地实施PDM系统,构建紧密的SolidWorks与PDM集成环境提供借鉴。     

Protel99SE与产品数据管理系统(PDM)的集成

一引言CAD/CAM技术突飞猛进对提高企业的市场竞争力起到了至关重要的作用但是CAD/CAM技术的发展又激化了先进设计制造技术与落后管理手段的矛盾产品数据管理PDM系统是解决这一矛盾的有效手段PDM系统能够为各个不同的系统之间建立统一的产品数据模型解决信息孤岛问题PDM为企业信息集成提供了统一的框架体系使企业的设备资源人力资源产品数据经营过程和应用工具协同运行从而极大地提高了企业的效率不同的企业不同的应用工具之间的产品对象各不相同没有统一的标准所以必须研究PDM与应用软件的集成技术本文研究了基于PDM系统的应用程…     

基于PBOM的工艺管理研究与实施

本文探究了PDM与CAPP在工艺结构管理、工艺设计管理、工艺数据存储和工艺审批管理等方面的集成问题。整体集成方案以工艺物料清单(PBOM)为基础核心,集成过程中以PDM的数据管理功能和CAPP的工艺设计功能为依托,发挥PDM对结构管理、数据存储管理及审批管理的强项,以CAPP作为工艺设计及工艺数据产出的唯一性工具,是一种集成简单、应用方便的成功案例。     

基于PDM的协同工艺管理系统

PDM是一个工具平台,以协助工程师和产品过程相关人员管理产品数据和产品过程,其策略是跟踪产品生命周期内设计、加工和建成(build)产品的所有产品数据,以便人们实现对最终产品的支持和维护.本文针对工艺信息系统对多用户协同工作与管理功能的需求,以PDM为平台,利用Web技术支持多任务与多用户的并行和异地协同工作及支持信息的并行传输和共享的特点,研究在协同环境下,以PDM产品为集成平台,基于XML的产品工艺数据的表达和存取方式、基于Web的工艺文件表现方式和管理技术、零件工艺设计的协同以及由此带来的新的工艺文件管理机制,并详细论述了在PDM平台上,基于Web的协同工艺管理系统的体系结构和关键实现技术.     

基于Pro/Toolkit的Pro/ENGINEER与PDM系统集成接口技术研究

Pro/Toolkit是Pro/ENGINEER自带的功能强大的二次开发工具, PDM系统与Pro/ENGINEER的集成成为PDM系统的一项关键技术.本文详细阐述了基于Pro/Toolkit开发Pro/ENGINEER与PDM接口的数据模型,功能模块及其实现过程.     

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。