面向对象的本体建模研究

UML语言是面向对象建模领域公认的工业标准,而本体建模是近来迅速发展的语义网中主要建模技术,UML在本体建模领域中的应用的可行性和具体方式一直是关注的焦点。该文对面向对象建模与本体建模之间的关系进行分析,基于UML本体承诺的概念,阐述了用UML对本体进行建模的本体对象建模的可行性,提出一种规范本体对象建模的UML元模型扩展方法,为UML直接对本体建模提供了理论依据。     

本体与UML在领域需求分析中的研究与应用

领域需求分析是实现领域内软件复用的保证,而领域知识的高效表述与有效共享是领域需求分析的前提.为解决领域知识理解与共享的问题,利用本体在领域知识表达方面的优势,研究了一种基于本体与UML的领域需求分析方法,为领域需求各方提供了一种明确的,定义良好且统一的需求表达方式,解决了所谓"通信鸿沟"问题;采用基于UML的领域本体建模方法建立领域本体模型,为本体模型提供了图形化、直观的描述,进而详细分析了基于本体与UML的领域需求分析过程,最后给出了模具产品数据管理系统的领域需求分析过程的实例.     

面向嵌入式软件开发的UML到Simulink模型转换方法

模型驱动开发及其关键技术模型转换是近年来软件工程领域研究的热点。在嵌入式软件开发早期,不仅需要对设计模型进行静态分析,更需要对其进行动态仿真,验证系统设计的正确性。如何把设计模型和仿真模型无缝连接起来是工业部门亟待解决的问题。深入调研了UML和Simulink模型转换研究现状,详细分析了模型驱动开发中模型转换的相关技术,提出了一种UML到Simulink的模型转换方法,设计了UML元模型、Simulink元模型,撰写了UML元模型到Simulink元模型的映射规则。最后选取自动驾驶仪系统的飞行控制软件作为案例,验证了该方法的正确性。该方法能实现UML和Simulink两种异构模型同构化,提高嵌入式软件开发效率,丰富并且完善模型驱动开发,也为飞行控制系统、高速铁路控制、机载航电系统等嵌入式软件开发提供了技术支持。     

基于元建模的实时系统模型转换方法研究

通过模型转换将UML模型转换为形式化模型并进行模型检验是软件工程研究领域的热点,然而传统的模型转换多是ad-hoc式的.转换规则复杂且难以重用.本文针对这一研究现状,通过元建模实现MARTE到时间自动机模型的转换,从而提出一种基于元建模的实时系统模型转换方法.该方法有效的分离了语法转换与语义转换,框架标准的支撑使得转换易于重用.最后通过一个实例来说明该方法的可行性与有效性.     

基于知识的UML图形文档自动生成

基于领域本体的需求获取使得用领域术语描述用户需求,并进行应用模型的自动分析成为可能,以尽可能地保证需求描述的正确性和完整性。从以领域概念为背景的应用模型,到以软件概念为基础的应用软件模型,是需求工程要完成的一个实质性跨越。UML是目前软件需求描述的一个实际上的标准。该文主要论述了从基于领域本体的应用需求描述到基于UML的软件需求文档的自动转换过程,文章提出建立从领域本体概念到UML概念映射规则库,以及根据UML概念填写用XML表示的UML图元模板的规则库,设计并实现了一个基于规则的,从应用需求概念到UML图元模板的自动转换工具。     

基于UML扩展的本体建模方法

在本体建模中,概念分类结构不明确,缺少理论指导,本体建模方法也欠缺特定本体描述语言定制能力。针对这种情况,该文将本体基础理论与UML本体承诺相结合,提出基于本体基础理论和UML元模型扩展的核心本体元模型及其扩展方法,并以Web本体描述语言为例,对核心本体元模型的扩展能力及扩展方法的有效性进行了验证。     

面向服务的本体元建模理论与方法研究

为实现互联网上异种异构的复杂信息资源有序化组织和互操作性服务与共享的目标。文章研究了语义服务的元计算问题。提出了本体元建模理论和方法．首先定义了本体UML承诺、提倡本体UML表达。给出了本体的元机制;论述了元建模中的“元”概念。给出了元层次停止准则、模型转换机制;然后提出了本体建模和MOF元模型设施相融合的体系结构,给出了以用户为中心的复杂信息资源服务应用模式SCDL为本体元建模方法的体系化提供了基础．还介绍了作者在国际ISO SC32标准MMFI for Ontology Registry研究中的应用成果．最后给出了HL7领域本体与元模型设计的应用．本体元建模为语义服务计算的实现。提供了一条可行的路径．     

基于UML的毕业设计管理系统的研究与设计

为了高效地开发毕业设计管理系统,将UML建模技术应用于系统的研究和设计中。首先提出了基于用例模型、领域模型、数据模型和Web模型的四步建模方法,其次通过提出的四步建模法与软件工程的思想,对毕业设计管理系统进行了分析与设计。该设计提升了开发效率、降低了开发成本,实现了毕业设计管理系统的高效性、交互性和并发性等性能。     

基于UML的医院信息系统领域模型设计

UML（标准建模语言）是面向对象技术一个重要应用,也是近代软件工程环境中对象分析和设计的重要工具.本文首先介绍了UML的基本内容,然后详细描述了在医院管理信息（HIS）系统开发中,使用UML建模方法完成系统的分析与设计,建立领域模型的全过程.     

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。     

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.