多Agent系统的技术研究

多Agent系统是由多个智能Agent组成的有机系统,这使得它具有比单个Agent更强大的处理能力.它表现出自组织性、鲁棒性、分布性以及很强的复杂行为.文中论述了Agent和多Agent系统的有关理论、方法和技术.主要包括智能Agent的特性、结构和推理;介绍多Agent系统的体系结构分类和常见的几种通信机制;以及面向Agent的程序设计的现状和发展.     

基于多Agent的设备更新决策协同系统研究

分析了设备更新决策流程,指出了一些现有设备更新决策支持系统的不足,应用智能Java Agent模板设计与实现了一个基于多Agent的设备更新决策协同系统,详细地介绍了系统的体系结构以及应用智能Java Agent模板实现基于多Agent的设备更新决策协同系统的方法.     

多Agent系统的技术研究

多Agent系统是由多个智能Agent组成的有机系统,这使得它具有比单个Agent更强大的处理能力。它表出自组织性、鲁棒性、分布性以及很强的复杂行为。文中论述了Agent和多Agent系统的有关理论、方法和技术。主要包括智能Agent的特性、结构和推理;介绍多Agent系统的体系结构分类和常见的几种通信机制;以及面向Agent的程序设计的现状和发展。     

集成Agent技术和软件工程技术

为了满足日益复杂应用的软件开发需求,近年来Agent技术研究的一项重要趋势是与软件工程技术相结合.讨论了集成Agent技术和软件工程技术的背景和需求;介绍了正在开展的基于组织抽象和Caste机制的面向Agent软件工程研究.该项工作的特点是借助于组织学的高层抽象和概念来支持基于Agent系统的分析、建模和体系结构设计,将Caste视为支持基于Agent系统实现的基本模块构件,并建立沟通这二者之间的技术桥梁.     

基于Agent的雷达管制自主教学模拟系统的设计

为了实现教学智能化,该文研究了传统雷达管制教学模拟系统的工作模式,使用Agent技术设计雷达管制自主教学模拟系统,介绍了系统的体系结构,详细介绍了系统各个Agent的功能以及重要Agent的构成。介绍了系统工作时,各个Agent之间的协调过程。     

Multi-Agent系统在主动网络管理中的应用研究*

将分布式人工智能中的智能Agent用于计算机网络管理,是近年来最活跃最前沿的研究领域之一。介绍Agent和多Agent系统(MAS)以及主动网络的概念,从分布式主动网络管理体系结构入手,论述了基于多Agent的主动网络管理模型,研究了主动网络管理智能Agent以及MAS体系结构。     

基于多Agent的洪水预报系统研究

在分析洪水预报方法及研究进展的基础上,提出了一种基于多Agent(Multi-Agent)新型体系结构的洪水预报系统模型,给出了系统的整体结构及预报节点MAS结构.简要介绍了界面Agent、管理Agent、信息Agent的地位、功能和设计方法,并详细研究了预报Agent的结构、算法设计.针对所提出的系统模型及预报方法,结合渭河流域实例数据进行了预报与分析.结果表明了该系统的有效性.     

分布式型号项目管理支持系统的构建--基于Agent技术

分析了分布式型号项目管理的特点,将Agent技术应用于分布式型号项目管理支持系统的构建,引入了界面Agent、实例化Agent、任务Agent和协调Agent,提出了基于Agent的分布式型号项目管理支持系统的体系结构,最后指出系统在设计过程中需要解决的几个关键问题。该系统通过多个Agent的通讯与合作,能够更好地辅助型号项目管理人员进行决策。     

多Agent信息融合的故障诊断研究

该文介绍了将分布式多Agent系统应用于信息融合对装备进行故障诊断的智能故障诊断技术,将多Agent技术与信息融合技术进行了有机的结合,并对多Agent的信息融合理论和故障诊断方法进行了研究。最后,分析了基于此技术的体系结构。     

软件Agent技术及基于FIPA的平台体系结构分析

软件Agent技术提供了一种新的计算模式，基于Agent的系统在解决复杂、开放、分布式问题上所体现出的潜力推动了Agent技术的研究和应用。介绍了Agent的概念、分类、BDI理论模型、体系结构、通信语言、本体论和分布式处理技术。对一个符合FIPA规范的Agent系统参考体系结构进行了分析。     

The mixed strip method using combination splines for plate bending

Based on the Hellinger–Reissner principle, a new mixed combination spline finite strip method is proposed. Not only the deflections of a plate, but also the moments can be simultaneously obtained with the same order of accuracy. The advantage of this method over the conventional finite strip method and the spline finite strip method is that the real values of the field variables, not parameters, can be directly obtained and the boundary conditions can be treated more easily. Numerical examples indicate that this method is effiecient and accurate.     

无人机飞行仿真系统多智能体建模分析与应用研究

无人机飞行仿真系统包含多个功能模块,采用多智能体(multi-Agent)技术研究无人机飞行仿真系统,分析并建立基于多智能体的飞行仿真系统的层次结构和运行机制,进而利用智能体对无人机仿真模型的各子模块模型运行过程进行建模,最后在JADE环境下建立了多智能体无人机飞行仿真系统的实例模型.这种方法可以通过仿真模型各子系统智能体之间的交互来完成无人机飞行仿真系统中飞行仿真的主要功能,从而满足无人机模拟训练系统的设计需求,在无人机模拟训练系统研究中具有广阔的应用前景.     

Geometric nonlinear analysis of stiffened plates by the spline finite strip method

Geometric nonlinear analysis of stiffened plates is investigated by the spline finite strip method. von Karman’s nonlinear plate theory is adopted and the formulation is made in total Lagrangian coordinate system. The resulting nonlinear equations are solved by the Newton–Raphson iteration technique. To analyse plates having any arbitrary shapes, the whole plate is mapped into a square domain. The mapped domain is discretised into a number of strips. In this method, the displacement interpolation functions used are: the spline functions in the longitudinal direction of the strip and the finite element shape functions in the other direction. The stiffener is elegantly modelled so that it can be placed anywhere within the plate strip. The arbitrary orientation of the stiffener and its eccentricity are incorporated in the formulation. All these aspects have ultimately made the proposed approach a most versatile tool of analysis. Plates and stiffened plates are analysed and the results are presented along with those of other investigators for necessary comparison and discussion.     

基于小生境技术的共享学习在协同设计中的应用

根据协同设计的特点,提出一种多Agent协同设计系统框架,以及产品数据模型的表示,构件的产生,搜索及更新。在对共享机制小生境技术的分析的基础上,提出协同设计系统中基于小生境技术的分类算法,以及协同设计系统中多Agent共享学习的方法,并以一个汽车设计为实例描述了协同设计及共享的学习过程。     

Application of the spline finite strip to the analysis of shear-deformable plates

A spline finite strip is proposed to analyse thick isotropic or laminated composite plates. The formulation is based upon the principle of virtual work and the third-order plate theory developed by Reddy. The variational functional requires the satisfaction of C₁,-continuity of the assumed vertical deflection variable which can be easily fulfilled by the present method. The proposed spline finite strip is a conforming element with a smaller number of unknowns at each node compared to other existing elements based on the third-order theory. For the analysis of thin isotropic or laminated plates, the present element shows no sign of shear locking. A number of computational examples are given to demonstrate the efficiency and the accuracy of the present method.     

Bending of skew plates by spline-finite-strip method

Spline finite strip was devised by Cheung et al. in 1982 [1]. Unlike the standard finite element method, this method employs B-3spline function for interpolation in one direction and local Hermite cubic polynomial in the other direction. The general form of displacement function is given as their product. Extensive numerical examples on right plates and shells were well documented by Cheung et al. [1]. but the applicability of this method in the analysis of skew plates remains unexplored. The main theme of the present paper is to generalize the technique to include parallelogram plates. As this extension still retains the banded nature, only a small amount of extra computing effort is required. The convergence of the method is established and it is supported by numerous examples of different loading and support conditions. It has shown that spline finite strip method, which requires less variables for interpolation, can achieve the same order of accuracy as the conforming finite element.     

Comparison of numerical techniques for 3D flutter analysis of cable-stayed bridges

This paper presents the results of a comparison study of the numerical techniques of structural and aerodynamic force models developed based on the spline finite strip method with the conventional finite element approach in three-dimensional flutter analysis of cable-stayed bridges. In the new formulation, the bridge girder is modelled by spline finite strips. The mass and stiffness properties of the torsional behaviour of complex bridge girder, which have a significant influence on the wind stability of long-span bridges, are modelled accurately in the formulation. The effects of the spatial variation of the aerodynamic forces can be taken into account in the proposed numerical model by distributing the loads to the finite strips modelling the bridge deck. The numerical example of a 423 m long-span cable-stayed bridge is presented in the comparison study. The accuracy and effectiveness of the proposed finite strip model are compared to the results obtained from the equivalent beam finite element models. The advantages and disadvantages of these different modelling schemes are discussed.     

Static analysis of cylindrical shells by using B spline functions

This paper is concerned with the application of cubic B₃ spline, quintic B₅ spline functions and eigen-functions which satisfy the boundary conditions to obtaining the approximate solution for the static analysis of a flat cylindrical shell. Unified computational schemes suited for various types of boundary conditions of cylindrical shell are presented in the paper. In comparison with the conventional finite element method and finite strip method, the main features of the present method are higher accuracy, less unknowns, easier programming and more economy in computing storage and time requirement. The numerical results presented are in good agreement with the exact solution.     

样条插值算法在耦合地球系统模式中的应用

为满足耦合地球系统模式应用的需求, 提出了一种二维样条插值算法, 并将其有效地实现成插值模块封装进地球系统建模框架（earth system modeling framework, ESMF）。该算法基于经典样条算法, 根据地球系统模式特点进行修改, 用两次一维插值扩张成二维插值, 引入极点区域外插处理, 将插值权重生成与插值结果计算两部分分离。实验结果表明, 该算法能获得高精度的插值结果, 模块化的设计使得用户可通过统一的接口来使用插值算法从而完成插值计算。     

基于多Agent的工作流管理系统的建模与实现

为解决传统工作流管理系统中存在的问题,Agent技术被越来越多地引入到工作流管理系统中.针对面向系统的工作流程,结合多Agent的设计概念,从实现角度提出以多Agent为基础的工作流管理系统架构.首先介绍了模型的工作机制,并采用面向Agent的软件工程方法--Gaia建模方法进行分析与设计,依据需求定义了系统运作中的Agent管理本体与Agent设计基本架构,最后以会议论文管理系统为例在JADE平台下进行实现,该架构为设计人员开发基于Agent的工作流管理系统提供了参考依据.