基于JADE平台的MAS通信协议封装研究与设计

针对多Agent系统中异构Agent通信格式的规范问题,提出一个基于XML的多Agent通解决方案.该方案利用XML技术的优势,通过对Agent消息的封装处理,能够使各异构Agent更好地理解和交换消息,同时在JADE平台下开发了一个通信原型,为异构Agent通信格式的规范问题的解决,提供了一种技术途径.     

基于多Agent的企业信息集成平台研究

提出了基于多Agent的信息集成平台。在该平台上,采用面向Agent的分析方法分析企业的不同运行任务,建立Agent模型,详细分析不同类别Agent的功能和结构。给出不同Agent之间的协作功能图。该集成策略能较好地解决目前企业中存在的自动化孤岛问题。     

基于EAI消息平台的异构系统数据同步

针对电信企业异构信息系统的数据同步与共享问题,提出一种基于企业应用集成(EAI)消息平台的数据同步方法。利用EAI技术对异构系统进行无缝集成,借助消息平台接收并解析异构系统的数据消息,触发ETL组件处理更新数据,实现异构系统数据同步。测试结果表明,该方法具有较好的实时性,并能有效降低异构系统的资源消耗。     

基于Multi-Agent的高校校园一卡通系统集成研究

在高校一卡通系统中,各子业务系统的数据库、操作平台等的异构性,使得各系统之间数据共享和交互协作成为目前高校一卡通迫切需要解决的问题。为了解决此问题,将Multi-Agent引入异构数据库集成系统中,利用XML对Agent之间的通信语言KQML进行封装,设计了一个完善的高校一卡通系统异构数据库集成方案。     

基于XML的多Agent消息通讯机制研究与实现

在多Agent分布式系统中,如何实现多Agent通讯是一个重要问题。以消息传输的方式实现多Agent系统的通讯,讨论了消息的XML格式封装和解析机制,以及基于消息优先级的消息传送同步控制算法,实现了消息的可靠有效传输。最后给出了可重用的系统仿真框架,并用Java语言得以实现验证。     

基于XML与移动Agent的信息集成中间件研究

CORBA中间件在解决异构平台的信息集成问题上应用越来越为广泛,但其面临着复杂网络环境的挑战.为了解决企业在分布式网络环境中信息的异构集成与共享问题,在深入研究与分析XML与移动Agent等相关技术后,提出了基于XML与移动Agent的信息集成中间件框架模型.该模型运用XML优秀的信息表示能力表示异构信息;运用移动Agent的移动性和智能性,解决中间件在网络环境中面临的网络不稳定、通信带宽窄、计算资源受限等问题,提高了企业信息集成系统的整体性能和可靠性.     

基于移动Agent和XML的异构数据库集成模型研究

为了解决异构数据库的数据集成和共享问题,提出了一个基于移动Agent和XML的异构数据库集成模型:采用虚拟法和XML技术,建立了全局数据集成框架;同时,采用移动Agent技术,解决了局部数据库数据智能集成的问题,优化了查询处理模块,有效地提高了数据库的查询效率.     

基于移动Agent的智能楼宇异构数据库集成设计

提出了一个基于移动Agent的智能楼宇异构数据库集成的框架,通过将数据库记录转换成XML文档形式,以及用Java语言和Aglet平台对移动Agent的设计,为智能楼宇异构数据库的集成提供了一种新方法。     

异构数据源集成技术在军事中的应用

军队信息化建设过程中,存在着大量异构、分散的数据信息,信息间关联性不易确定,形成一个个"信息孤岛".针对该现状,结合当前主流异构数据源集成技术,提出基于军事应用的异构数据源集成方案.使用XMLSchema定义全局数据模式,XOuery作为数据查询语言,采用数据映射技术,实现军事数据信息在军队系统中的共享集成.同时,在系统中采用基于角色的访问控制策略,提高了系统的整体安全性.     

异构系统的信息协同机制的研究

目前异构系统的信息交互主要是通过web 服务或CORBA 技术建立点对点的通信来完成,由于其系统间功能和结构紧密耦合,缺少灵活性,因此很难解决多系统的信息异构和系统异构问题。本文提出一种新的机制,采用web 服务来完成系统间的相互连接,通过自定义消息机制完成异构系统间的信息转换,以解决信息不一致、信息丢失、信息冗余等问题,并使用订阅/发布的模式动态组织系统间的逻辑结构,以解决通信紧密耦合的问题。 此机制对解决多异构系统间的信息协同,多系统间的信息一致性更新,广域网内的分布式通信和多个异构系统集成等问题都有     

智能控制中的多Agent系统

根据智能控制的安全、经济和舒适三大目标,提出一种新的基于BACnet(楼宇自动控制网络数据通信协议)的MAS(多Agent系统)框架．此框架通过不同层次、不同功能的Agent的自治能力及协作协调,使得智能控制系统的各个相对分散的子系统能够有效地结合在一起．全局Agent负责整体功能的实现,而每个子系统均设置自身的Agent组．此外,还提出了基于MAS框架的SAS(安防自动化系统)逻辑结构,同时遵循FIPA(智能物理Agent基金)标准设计了此MAS系统的Agent通信语言,并对SAS系统进行了重点分析和研究,包括CCTV(闭路电视监控)系统和基于Auto-ID(自动识别)的系统．     

Consensus problem of heterogeneous multi-agent systems with time delay under fixed and switching topologies

Consensus problem is investigated for heterogeneous multi-agent systems composed of first-order agents and second-order agents in this paper. Leader-following consensus protocol is adopted to solve consensus problem of heterogeneous multi-agent systems with time-varying communication and input delays. By constructing Lyapunov-Krasovkii functional, sufficient consensus conditions in linear matrix inequality(LMI) form are obtained for the system under fixed interconnection topology. Moreover, consensus conditions are also obtained for the heterogeneous systems under switching topologies with time delays. Simulation examples are given to illustrate effectiveness of the results.     

A game theoretic approach for the distributed control of multi-agent systems under directed and time-varying topology

This paper presents a new game theory based method to control multi-agent systems under directed and time varying interaction topology. First, the sensing/communication matrix is introduced to cope with information sharing among agents, and to provide the minimal information requirement which ensures the system level objective is desirable. Second, different from traditional methods of controlling multi-agent systems, non-cooperative games are investigated to enforce agents to make rational decisions. And a new game model, termed stochastic weakly acyclic game, is developed to capture the optimal solution to the distributed optimization problem for multi-agent systems with directed topology. It is worth noting that the system level objective can be achieved at the points of the corresponding equilibriums of the new game model. The proposed method is illustrated with an example in smart grid where multiple distributed generators are controlled to reach the fair power utilization profile in the game formulation to ensure the aggregated power output are optimal.     

基于CORBA的智能建筑管理系统IBMS的设计与实现

信息共享在智能建筑管理系统中起着十分重要的作用。由于传统的智能建筑中各个控制子系统和管理系统相互独立,又没有一个统一的管理系统来集中管理,所以信息共享的程度很低。本文描述的基于COBA技术设计的智能建筑管理系统（IBMS）,是针对建筑物内所有子系统为典型的分布式系统和特征来设计和开发的一个集成的管理系统。该系统采用ORB作为软件总线,通过统一的接口将分布于楼宇内的各个控制子系统集成起来,为各个子系统提供一个统一的操作管理平台,实现了智能建筑内各个子系统之间的互操作,以达到信息交换和信息共享的目的。     

A GENERIC TIME MANAGEMENT SERVICE FOR DISTRIBUTED MULTI-AGENT SYSTEMS

Multi-agent systems are well suited for building large software systems. A great deal of these complex systems includes process flows that are concerned with time or are even time-critical. The activities of these process flows are often executed in distributed autonomous subsystems that have to be synchronized with respect to the superordinated task execution. To be able to build such systems and test their behavior adequately, it is often advantageous and sometimes necessary to simulate them in the run-up to their practical use. Testing and simulation of process flows within multi-agent systems requires synchronization of the participating agents with respect to the global simulation time. In this paper, a design proposal and a service implementation for time management is presented, which takes care of the special requirements imposed by multi-agent settings. This so-called time service is implemented as an FIPA-compliant agent, and can be used to couple heterogeneous subsystems implemented on different agent platforms.     

Robust asymptotic model matching and its application to output synchronization of heterogeneous multi-agent systems

Output synchronization of heterogeneous multi-agent systems has been one of the most interesting cooperative control problems. This paper first gives a brief survey of the research on the problem from which we see that the problem can be solved in a two-step manner with the aid of a properly designed local reference for each agent: (i) a controller is designed for each agent to achieve the trajectory regulation of the agent output to its associated reference; (ii) network collaboration is added to achieve consensus among references. In the presence of system uncertainties, the robust trajectory regulation problem in (i) can be solved by an internal model design. In this paper, we formulate a novel robust asymptotic model matching problem which is less conservative than trajectory regulation and can be solved by a static controller not relying on an internal model. Moreover, network collaboration is designed in (ii) within the so-called output communication setting such that consensus among references occurs concurrently with robust asymptotic model matching. As a result, output synchronization of heterogeneous multi-agent systems is achieved with a novel approach.     

An agent-based approach to knowledge management in distributed design

The collaboration process among individuals with heterogeneous skills in a distributed virtual environment represents a crucial element of the extended enterprise. In order to achieve global optima in design, there is an increasing need for design teams to establish and maintain cooperative work through effective communication, co-location, coordination and collaboration at the knowledge level. Because of the distributed nature of users and information resources involved in the design process, the need for appropriate knowledge management tools is imperative. This paper proposes an agent-based architecture to support multi-disciplinary design teams that cooperate in a distributed design environment (DDE). Using ontologies and multi-agent systems (MAS), the proposed framework aims to optimise design process operation and management by supporting the dialogue among distributed design actors. Received: February 2005/Accepted: January 2006     

基于SOAP协议的Agent通信语言的研究

Agent通信语言是实现多Agent系统交互与合作的基础。SOAP作为一种新的与平台无关的通信协议,可以实现异构多信息的交换,使得各孤立系统的通信变得容易。文中在分析Agent通信语言,XML,SOAP,WebService等技术的基础上,结合KQML语言提出了一种基于SOAP协议的Agent通信实现方法,这种方法的消息结构由三层组成:SOAP层、KQML层和内容层。并分析了这种三层结构的消息表示的优势及其在实际系统中的应用。     

基于履带式本体构建方法的多代理模型研究

本体工程为本体构建提供与其相适应的本体开发方法。履带式本体构建方法具有较强的适应性,能够针对本体的不同规模来指导本体开发操作,并对开发过程进行评估。为提高本体构建效率,利用多代理的分布性、自治性、协作性等特点,构建了支持履带式本体开发方法的多代理模型,对其中的代理、通信和代理之间的协作进行了形式化定义和描述,并实现了代理操作、协作等相关算法和代理运行平台。     

Controllability of heterogeneous multi-agent systems under directed and weighted topology

This paper considers the controllability problem for both continuous- and discrete-time linear heterogeneous multi-agent systems with directed and weighted communication topology. First, two kinds of neighbour-based control protocols based on the distributed protocol of first-order and second-order multi-agent systems are proposed, under which it is shown that a heterogeneous multi-agent system is controllable if the underlying communication topology is controllable. Then, under special leader selection, the result shows that the controllability of a heterogeneous multi-agent system is solely decided by its communication topology graph. Furthermore, some necessary and/or sufficient conditions are derived for controllability of communication topology from algebraic and graphical perspectives. Finally, simulation examples are presented to demonstrate the effectiveness of the theoretical results.