复杂电路虚拟维修的建模与仿真技术

分析了电路虚拟维修的特点,总结了电路虚拟维修系统中必不可少的3种模型:仿真模型、交互模型和三维模型,研究了3种模型的特点和建模方法.提出了一种层次化模型结构:功能层、应用层和显示层,并研究了各层之间的信息传递.引入多Agent系统理论建立电路虚拟维修系统中不同类型的智能Agent模型,研究了基于KQML的各Agent间通信的方式.最后根据模型的层次化结构建立了一个基于多Agent系统的电路虚拟维修训练系统.     

基于虚拟引擎的交互系统研究

针对网络环境下虚拟交互的应用问题,提出虚拟交互引擎模型结构。借助多Agent协同以及3D交互互感的接口标准,为虚拟现实系统提供Agent库、交互规则库等4个核心模块结构库。通过交互库构建用户设计输入操作感知等虚拟交互子系统,并给出虚拟交互引擎解决方案。     

开放式环境下基于多Agent角色协作的虚拟植物建模方法

在计算机中模拟植物生长发育情况在农学、林学、遥感和生态学上都有很广泛的应用.静态环境下的模拟工作已做得很好,但在动态环境下模拟工作由于难度较大而成果较少.基于多智能体角色协作机制,提出一种在开放式环境下虚拟植物的建模方法.模型考虑了角色分配、角色回收、基于L_系统的树形模型算法、各种随机因素影响、剪枝算法和光照影响算法.对于Agent技术在虚拟植物建模上的研究提出了一些应用方法和技术路线.     

基于面向对象着色Petri网的多Agent系统建模

提出了一种基于面向对象着色Petri网（OOCPN）的多Agent建模方法,与其它建模方法相比,OOCPN可以全面地刻画出Agent的个体行为特征和多Agent间复杂、并行的动态交互,讨论了利用OOCPN进行个体Agent和多Agent间交互协议的建模,并通过对网上智能购物系统的实例分析,展示了OOCPN对多Agent系统的建模能力。     

面向虚拟企业的分布式项目管理系统研究

分析虚拟企业项目的特点;针对参与虚拟项目的企业既合作又独立的特点,提出项目自治域的概念,并给出基于自治域的虚拟企业项目管理系统的模型;针对虚拟项目的计划、资源集成、资源建模等关键技术进行深入讨论,提出了受约束的动态关键路径算法和基于多Agent系统的资源集成模型;最后给出实现虚拟项目管理系统的体系结构。     

基于OCC的Agent情感模型研究

Agent不仅要具有逻辑推理能力,还应当具有类似人类的情感能力。通过对情感理论的分析,提出了一个基于OCC的Agent情感模型,使Agent能够模拟像人类一样的认知能力和情感能力,从而行为决策更加智能。通过模型在虚拟环境角色中的应用结果,验证了此模型的合理性。     

一种基于网格体系结构的AOMG方法

针对网格体系结构的异构性、开放性、自适应性等特点,利用组织学观点和Agent抽象机制,提出了一种面向Agent的分析和设计建模方法《Agent—oriented Modeling based on Grid,AOMG),用于基于网格环境的分布式应用的分析和设计。该方法定义了开放式组织、角色、Grid—Agent、服务、网格节点等概念,提出了适合于网格分布式应用的分析和设计模型,并通过一个电子商务系统对整个分析和设计建模过程进行阐述。     

严肃游戏中虚拟角色行为建模综述

严肃游戏是计算机游戏一个新的发展方向,可以提供形象互动的模拟教学环境,已经广泛应用于科学教育、康复医疗、应急管理、军事训练等领域。虚拟角色是严肃游戏中模拟具有生命特征的图形实体,行为可信的虚拟角色能够提升用户使用严肃游戏的体验感。严肃游戏中的图形渲染技术已经逐步成熟,而虚拟角色行为建模的研究尚在初级阶段。可信的虚拟角色必须能够具有感知、情绪和行为能力。本文分别从游戏剧情与行为、行为建模方法、行为学习和行为建模评价等4个方面来分析虚拟角色行为建模研究。分析了有限状态机和行为树的特点,讨论了虚拟角色的行为学习方法。指出了强化学习的关键要素,探讨了深度强化学习的应用途径。综合已有研究,归纳了虚拟角色行为框架,该框架主要包括感觉输入、知觉分析、行为决策和动作4大模块。从情感计算的融入、游戏剧情和场景设计、智能手机平台和多通道交互4个角度讨论需要进一步研究的问题。虚拟角色的行为建模需要综合地考虑游戏剧情、机器学习和人机交互技术,构建具有自主感知、情绪、行为、学习能力、多通道交互的虚拟角色能够极大地提升严肃游戏的感染力,更好地体现寓教于乐。     

基于元Agent技术的作战个体行为建模

针对虚拟作战个体行为具有智能性和自主性的特点,从行为功能考虑,将影响人员外在行为的内部因素分解为元Agent,提出一种基于元Agent聚集的作战人员行为模型。依据各个主体特点采用智能模型实现其结构,描述感知因素的量化值和可信度,引入收益指标评估意图的远景规划,通过动作执行概率的赋值达到重复作战行为的优先选择。与传统方法相比,该模型充分考虑到个体行为内在因素间的交互耦合和复杂反馈,提高了作战个体战场行为的智能性、自主性和差异性,为作战人员行为建模等问题提供一种新的研究思路。     

基于组织的面向Agent 程序设计及其语言Oragent

当前,面向Agent程序设计在支持动态开放多Agent系统开发方面存在一系列的不足,如缺乏高层抽象、底层实现模型与高层设计模型相脱节、在支持系统动态性方面缺乏有效的运行机制和语言设施等.针对这些问题,提出一种基于组织的面向Agent程序设计方法.该方法将组织、Group、角色和Agent等高层抽象作为一阶实体,缩小了多Agent系统的设计模型与实现模型之间的概念鸿沟;借助于组织学中的机制——角色扮演机制、基于角色的交互——支持系统动态性的规约和实现,如Agent行为的动态组合、动态的交互等,基于该程序设计思想,设计了基于组织的面向Agent程序设计语言——Oragent,定义了其抽象语法和形式语义,并通过案例分析说明了如何基于该程序设计思想和Oragent语言来构造和实现动态而灵活的多Agent系统.     

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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