MDA概念和技术在仿真系统开发中的应用研究

模型驱动架构(MDA)集成了统一建模语言(UML)、元对象机制(MOF)、可扩展标记语言(XML)和基于XML的元数据交换(XMI)等一系列标准,强调模型在软件开发中的重要作用.简要分析了建模与仿真和软件工程领域的若干典型模型开发与运行过程,将仿真系统的开发过程划分为需求工程、分析、设计、实现和试验五个主要阶段;探讨了模型驱动架构(MDA)的概念和技术(包括模型、建模技术、模型变换技术、代码自动生成技术等)在仿真系统开发各个阶段的应用;以交通仿真为例,给出了部分建模与仿真结果,展示了仿真系统开发过程与MDA相结合的可行性,表明了在MDA工具的支持下,MDA概念和技术的应用可以提高仿真系统的开发效率.     

基于模型驱动的HLA建模仿真研究

HLA作为现有分布交互仿真的标准,其系统实现受限于特定的仿真支撑平台,互操作性和可重用性没有得到有效地应用.而OGM提出了模型驱动体系结构(MDA),核心思想是将系统的行为逻辑模型与特定的目标平台分离,可以重用于现有的或将来可能推出的不同的软件平台.关注MDA的特点,针对基于HLA的仿真系统开发存在的有关问题,设计了基于MDA的仿真组件模型和联邦成员组件模型,并提出了基于MDA的建模仿真基本过程.     

一种组件化仿真模型(SCM-1)及其实现

火箭飞行仿真系统是一种复杂大系统;为降低系统开发的复杂度,相关专业仿真模型应具有较高水平的可重用性以及较低水平的建模复杂度,并且遵照统一的建模规范,提出了一种新的仿真组件模型(SCM-1),论述了该模型的输入/输出接口、控制接口和功能接口组成形式,设计了基于XML的模型描述规则和C语言标准代码框架,在此基础上研究了一系列该模型的通用支持工具,最后给出了某弹道模型的实例,实践表明该仿真模型建模规范能够有效提高火箭飞行仿真系统的效费比。     

基于MDA的训练仿真建模研究

文中从模型驱动体系(MDA)的特性出发,根据某作战仿真系统的研究成果,分别从MDA基本模型、模型描述两方面研究了基于MDA体系的训练型仿真系统模型的结构.随后从建模的过程入手,探讨了基于MDA的仿真系统开发方法,有助于进一步对MDA在仿真系统中的应用进行研究,同时也为其他类型仿真系统的建模方法提供了一定的参考.     

基于MDA的分布式建模仿真框架

分析现有分布式建模仿真存在的缺点,提出将模型驱动体系结构(MDA)应用于分布式建模仿真。设计一个基于MDA的分布式建模仿真框架,给出资源层、PIM建模层、PSM建模层和仿真运行平台层的四层仿真体系结构。研究该框架的开发过程及关键技术,并设计即插即用武器系统分布式仿真平台。仿真结果表明,该框架使得分布式仿真系统具有更好的可扩展性,提高了仿真组件的互操作性和可重用性。     

基于MDA的软件建模方法研究

模型驱动架构(MDA)是一个新的软件开发框架,它溶入了软件工程领域的新思想、新方法和新技术。本文研究了基于MDA的软件建模方法,探讨了模型在整个软件生命周期中起的关键作用,提出了一种从平台无关模型(PIM)到平台相关模型(PSM)的转换方法。     

基于DirectX的无人机三维虚拟飞行仿真系统开发

建立无人机三维虚拟飞行仿真系统对于无人机的设计、研制与操纵培训具有重要的意义.介绍了一种低成本的基于PC机的无尾式无人机实时三维虚拟飞行仿真系统,对建模与仿真、DirectX、数据库、面向对象编程等技术在可视化系统仿真领域的应用作出了积极的探索与尝试.介绍内容主要为三维仿真建模接口技术比较与采用、无人机飞行仿真系统模型组成与仿真算法采用以及如何运用软件工程概念开发无人机实时飞行仿真软件系统.     

基于MDA的并行仿真可视化组件建模范式

并行仿真是提高分析仿真运行效率的有效途径.当前国内外并行仿真由于缺乏高效统一的可视化组件建模范式的指导,往往需要采用从上到下的集中式开发模式,开发门槛高、效率低、二次建模困难,且模型间的耦合度大、协调难,模型与仿真平台紧密绑定,难以实现模型的分步开发、封装、快速组装及平台间模型的重用.作者结合组件建模及MDA技术的优势...     

模型驱动的嵌入式仿真系统设计

为解决嵌入式系统仿真应用需求多样性的问题并提高系统的开发效率,设计一种通用嵌入式仿真系统。该系统在Matlab/Simulink开发环境的基础上,采用模型驱动的方法设计仿真模型并构建仿真组件库,实现了仿真系统模型的快速建立。同时设计了多接口、可扩展的仿真器硬件结构,解决了嵌入式系统接口的多样性问题。该仿真系统具有良好的可重用性和可移植性等特点,可用于多种嵌入式软件的开发,具有现实意义。     

应用UML进行反辐射导弹对抗仿真建模

反辐射导弹是现代战场上雷达的主要克星，因此熟悉其特性，研究专门的战法具有重要的现实意义。该文阐述了面向对象的软件工程方法学对开发大型仿真系统软件的显著作用，并运用统一建模语言对反辐射导弹对抗仿真软件进行建模。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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