面向体系结构的可视化服务集成开发环境Artemis-VIDE

为支持直观易扩展的软件服务集成和所集成之应用系统的动态演化,本文提出了一个面向体系结构的可视化服务集成开发环境。该环境支持以图形化的方式定义系统的软件体系结构及相关协同逻辑,并据此生成内置于应用系统之中的运行时刻体系结构对象,作为应用系统运行和演化的基础。该环境还集成了服务搜索、基于图文法的体系结构检查等功能,为系统的开发、运行、监控和动态演化提供了一个一致、易用、可扩展的支撑平台。     

面向模型的动态架构

为了使应用系统能够动态调整以适应用户需求的变化,提出一种面向模型的动态应用架构。该架构以生成的框架对象实例来调度各应用构件的工作,在框架层解释模型与构件间的引用和交互过程。通过把用户业务需求这一抽象概念具体化为可直接操控的模型,给出一种面向模型的动态架构演化技术。设计并实现了一个支撑平台IPmis,为具有动态调整能力的应用系统的开发和运行提供了可视化的集成环境。在此平台上完成了医疗保险集成系统的开发,满足了随用户需求变更和动态调整的需要。     

一种面向模型的动态架构及其支撑平台

为了让应用系统能够灵活地动态演化以适应用户需求的变化,提出了一种面向模型的动态应用架构.该架构以生成的框架对象实例来调度各应用构件的工作,在框架层解释模型与构件间的引用和交互过程.通过把用户业务需求这一抽象概念具体化为可直接操控的模型,给出一种面向模型的动态架构演化技术.为支持这一架构,设计并实现了一个支撑平台IPmis,为具有动态调整能力的应用系统的开发和运行提供了可视化的集成环境.在此平台上完成了医疗保险集成系统的开发,系统满足了随用户需求变更动态可调的需要.     

一种面向动态软件体系结构的在线演化方法

为适应计算环境和用户需求在系统运行期间的变化,满足软件系统进行动态演化的需求,提出面向动态软件体系结构的在线演化方法,设计并实现了一种运行时刻的软件体系结构元模型,将原先运行时刻不可见的体系结构设计信息具体化为显式的体系结构实体,并与系统实现及系统规约之间保持因果关联.元模型的演化可通过反射实现对运行系统的修改和对规约的更新,所有演化行为都在良定义的体系结构元模型的指导下规范地进行,保证了演化前后系统的一致性、完整性和演化的可追溯性.基于该方法开发了可视化支撑平台Artemis-ARC系统,支持构件和服务的设计、开发、集成及动态演化,并通过简单的应用实例展示了在线演化的效果.     

一个面向服务的支持动态演化的软件模型

为了使面向服务的架构更适应动态演化的需求,提出了基于体系结构空间、支持动态演化的软件模型SASM．SASM是使用反射技术,通过具有因果相联的基层和元层来构造．基层由可运行的服务形成,元层是一个具备树形层次、层间存在求精关系的体系结构空间．该空间反映了需求的层次性,提供给用户不同抽象级别的视图和管理手段．通过对体系结构空间的观察,可获知系统的结构和行为信息．通过对体系结构空间的在线调整可实现对基层的修改进而实现系统的非预设动态演化,而空间中不同层次之间的求精关系保证了应用的完整性和演化的一致性．     

一种面向图的分布Web应用架构技术

提出一种面向图的软件体系结构描述和实现技术(称为WebGOP)来支持分布Web应用系统的架构，开发者通过定义图的拓扑结构来描述体系结构，并可以根据需要定制图的类型以更好地表达特定的体系结构风格。同时，这个图实现为一个分布共享对象，显式地存在于应用系统之中，为各个构件的执行提供了一个面向图的上下文，也为体系结构的实现和动态演化提供了依托．该技术直观性强，有助于缩小体系结构描述与实现之间的距离，特别是可为系统动态重配置提供良好的支持．该文还利用edNCE图文法对WebGOP进行了形式化处理，设计实现了一个WebGOP原型系统，并对这个原型系统的关键性能指标进行了测试以表明该技术的可行性。     

软件体系结构驱动的运行环境

由于软件体系结构以隐性的方式存在，结构的问题被传播到平台内，运行时软件体系结构不能在应用层次上被观察和控制，系统难以联机动态演化．在现有的中间件平台之上设计了一个面向应用、开放的、软件体系结构驱动的分布式远行环境SADRE（Software Architecture—Driven Runtime Environment），软件体系结构在可运行系统中以一类实体显性地表示,体系结构描述作为核心元素被整个分布式运行环境共事，成为系统调度、通信的依据．从而驱动用户应用的运行．SADRE为灵活的动态体系结构提供了良好的支持，提高了系统的柔性和扩展性．     

基于J2EE的SOA平台设计

介绍了一个基于J2EE环境的面向服务的体系结构(SOA)的开发和运行平台的设计实例.从应用开发角度看,该平台提供了一个基于MVC的简易的应用开发框架;从运行平台角度看,该平台提供了一个Web环境下标准的三层体系结构(B/S/S)的运行环境.     

ARTEMIS-ARC系统协同模型的自省式实现技术研究

基于运行时体系结构的协同模型能够为面向服务的协同应用系统的动态演化提供有效的支持。但是在实现层面上,如何使软件体系结构从抽象的规约转化为运行时实际的对象实体,并成为系统演化行为的直接载体,是一个较为困难的技术挑战。针对这个问题,本文提出一种基于计算自省的实现途径,主要包括基于面向对象程序设计语言构造的体系结构层面的元表示和元协议、基于体系结构上下文中对象引用重解释构建的因果互连机制,以及基于该因果互连机制的应用系统的动态重配置。以上实现方式在自行开发的服务协同系统ARTEMIS-ARC时得以实施。     

基于Web服务的动态工作流系统的研究与实现

分析了面向服务的计算环境及服务组合的新特征和新问题，并在此基础上从面向业务用户的角度对基于Web服务的动态工作流进行了探讨，提出一种基于Web服务的动态工作流模型。以该模型为基础，设计了具有三层结构的基于Web服务的动态工作流系统，按照该架构并基于J2EE平台实现了系统．对基于web服务的动态工作流应用提供了系统支撑与验证环境。     

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。