基于BDI的多Agent交互

给出一个以Ａｇｅｎｔ交互为基本出发点的ＢＤＩ描述语言ＭＡＬ,对ＭＡＬ反映的ＢＤＩ概念,ＢＤＩ间的关系以及多Ａｇｅｎｔ群体的社会承诺和联合意图进行了解释,说明了ＢＤＩ在多Ａｇｎｅｔ交互过程中的起的作用,与Ｃｏｈｅｎ和Ｌｅｖｅｓｑｕｅ,Ｒａｏ和Ｇｅｏｒｇｅｆｆ以及ｈａｄｄａｄｉ等人的工作相比,ＭＡＬ同时Ａｇｅｎｔ个体和多Ａｇｅｎｔ群体的ＢＤＩ描述,克服了对ＢＤＩ概念的反直观解释,给出了符合哲学含义的关     

空地协同分布交互仿真中DR算法研究

推算定位（ｄｅａｄ ｒｅｃｋｏｎｉｎｇ,ＤＲ）技术是大型分布交互仿真（ＤＩＳ）系统的关键技术,在研究传统的一阶、二阶和高阶ＤＲ算法基础上,针对民航飞行、领航和地面管制综合训练的空、地协同分布交互仿真系统（ＤＡＧＩＳ）,提出了基于模型的ＳＲ算法（ＭＢＤＲ）,探讨一种自适应模型转换方法和动态门限选取问题,比常规ＤＲ算法更好地夺缩了网络通信量,讨论了与ＤＲ算法相关的平滑和延时补偿问题,在构造的ＤＡＧＩＳ     

基于GalaxyDB的地理信息系统

本文介绍了一个基于数据库管理系统ＧａｌａｘｙＤＢ的地理信息系统ＶＩＧＯＲ，并提出了一种新型的建模思想－对象关系系统模型。     

GIS与二维泥石流数学模型集成系统研究

针对栅格式ＧＩＳ－ＥＲＤＡＳ和二维泥石流流团模型系统（ＤＥＢＲＩＳ），从模型参数自动获取、数据处理、ＧＩＳ与模型系统的集成策略与操作机制、模型产生的多时相泥石流数据的ＧＩＳ管理与可视化表达、泥石流模拟数据的深层次分析等多个方面探讨了两者之间的系统集成问题。依此为基础，设计并实现了系统间的有效连接。     

自主开发的扩展关系模型数据库系统ERDB和GIS_DEMO

本文介绍了一个扩展关系模型数据库系统ＥＲＤＢ和在该系统之上开发的一个ＧＩＳ系统,重点讨论了ＧＩＳ中的拓扑表示和递归查询问题,并从中说明这种扩展的重要意义。     

基于曲面模型的IGES前后置处理器的设计

符合ＩＧＥＳ标准的曲面模型的输入和输出是大多数ＣＡＤ系统必备的数据接口之一,本文设计了一种基于裁剪ＮＵＲＢＳ曲面片的ＩＧＥＳ曲面模型的前后置处理器,并 详细讨论了Ｂｒｅｐ表示的实体模型和曲面模型的相互转换,在曲央模型到实体模型转换中使用了基于ｏｐｅｎ ｅｄｇｅ结构的曲面拓扑信息重建技术。     

分布式多媒体地理信息系统的初步研究

本文首先从地理信息系统（ＧＩＳ）设计模型入手，简要回顾了ＧＩＳ的４种设计模型。通过比较分析，指出整体ＧＩＳ设计模型更适宜于分布式和多媒体技术发展带来的挑战。然后，以作者设计的ＧＩＳ试验系统ＧＥＯＤＢＭＳ为例，介绍了分布式环境下的空间数据获取，更新和查询方法。     

SDB：一个面向分布式GSI的空间数据库

ＳＤＢ是一个面向分布式地理信息系统的空间数据库系统,该系统采用软件组件模型,符合ＯｐｅｎＧＩＳ规范,具有互操作性,支持数据共享和功能共享,能够用于ＧＩＳ软件的集成,支持面向因特网的组件化ＧＩＳ软件的开发。     

运用3S技术建立包头市郊区县土地利用动态监测数据库

准确把握县级土地利用及其变化状况具有重大意义。结合国家“九五”重点课题在包头市郊区县的工作,介绍了遥感、全球定位系统和地理信息系统在获取县级土地利用变更数据中的作用和技术路线。研究结果表明,遥感发现了全县土地利用变化靶区９６．２％。县级土地利用动态监测的工作特点决定了ＧＰＳ测量将采用“测码伪距动态差分定位法”,其数据方式是“后处理方式”。“假５４”解算方法和“２Ｄ异常数据”处理方法大大提高了数据精度和内外业工作效率。最后基于一个ＴＧＩＳ原型ＤＢＤＭＬ,说明了如何利用ＴＧＩＳ技术在ＳＧＩＳ环境中以空间—时间立方体模型为基础实现ＴＧＩＳ功能。在ＤＢＤＭＬ的实现中进行了时间、空间、属性三要素关系描述、基本用地单元模型化和基本用地单元关系等方面的研究     

基于Internet的空间数据库访问技术研究及实例

空间数据库是ＧＩＳ的核心,设计和实现基于Ｉｎｔｅｒｅｎｔ的ＧＩＳ的关键点之一就是如何实现基于Ｉｎｔｅｒｎｅｔ的空间数据库的访问。本文从介绍Ｊａｖａ与ＪＤＢＣ入手,重点介绍在我们设计和实现的一个基于Ｉｎｔｅｒｎｅｔ的ＧＩＳ系统中如何对空间数据库进行有效访问。     

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.     

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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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