复杂诊断系统的MAS分布式协作方法

为适应故障诊断中动态变化的环境和满足求解复杂系统全部任务的要求,研究一种基于MAS的分布式智能监控系统。以诊断决策问题的结构及建模过程的层次性为基本思想,基于诊断任务的多层次混合分解策略,提出融合不同表达方式和推理机制的多Agent并行诊断结构,建立了具有公共属性的智能体模块化层次结构,实现了基于MAS多层分布式黑板模型的智能监控系统。工程应用效果验证了多智能体结构框架下复杂系统分布式求解的可行性和有效性。     

多Agent系统中的任务可调度问题

为了将Agent方法应用于应急系统等新领域,在对该类系统研究的基础上提炼出它们的公共特征,根据这些特征设计出一种MAS系统模型,并在该模型的基础上定义了相应的任务可调度问题.利用网络流模型对可调度问题进行了建模,证明了最大流算法可以求解该可调度问题,由此说明该问题是可多项式时间求解的.并且对于给定该问题的一个可调度实例,利用最大流算法还可在系统中找到一组Agent完成所有任务.通过对该网络流模型的进一步分析,得出并且证明了任务可调度判定的充分必要条件,利用这个结论可以快速判断当前任务是否可调度.     

基于MAS的铁路信号设备故障诊断系统

MAS技术的发展为信号设备故障诊断系统的设计和实现提供了极具潜力的一条途径,基于MAS的故障诊断系统能够融合不同的诊断方法实现复杂系统的故障诊断任务。研究了以MAS理论为基础,基于MAS的信号设备故障诊断系统。针对信号设备故障的复杂性,还研究了面向Agent的模糊算法和神经网络混合诊断策略。     

基于MAS的铁路信号设备故障诊断策略

主要讨论基于MAS技术为铁路信号设备故障诊断系统设计面向Agent的任务分解策略和诊断策略.由于铁路信号设备故障的复杂性和多样性,管理Agent首先进行任务分解,将不同类型的故障分配到不同故障诊断Agent中进行诊断.根据故障类型设计相应的诊断Agent能有效提高诊断的精度和效率.     

MAS的发展及其应用

随着 Agent技术的不断成熟 ,A gent也逐渐融入应用计算机的各个领域 ,同时多 Agent系统 (MAS)也应运而生。多 Agent系统是分布式计算的一个新的研究领域 ,它通过多个 A gent之间的合作来完成问题求解 ,其中每个多 Agent系统就是一个有纪律的组织。本文把 MAS应用在一个数学问题的求解中并通过编程来实现 ,实践证明 ,该应用具有可行性和一定的应用价值     

基于声誉和承诺度的寻找合作Agent的方法

在多Agent系统中,个体Agent的知识和问题求解能力是有限的,所以寻找合作Agent协作共同完成任务,成为问题求解的关键.利用承诺度值克服通信开销、资源浪费的问题,构造声誉模型解决Agent采用欺骗手段,故意提高承诺值,来获得对任务的执行权利.在依据声誉值作为是否合作的前提下,再考虑Agent的承诺度值,在多Agent系统中是一种较为理性的分配任务方法.     

复杂系统的MAS动态协作求解时序逻辑模型

借助于组织学思想,将自适应系统中的自主运行单元抽象为Agent,把复杂自适应系统视为多Agent组织,从时间和状态角度,对复杂动态系统的行为进行描述。提出了基于时序活动逻辑的多Agent动态协作任务求解自适应机制和构造模型;详细分析了任务求解BDI Agent的信念、愿望、意图的产生过程和实现方法;深入讨论了协商推理的语义规则和行为规则;给出了协作群组的选择算法,包括从群组的建立、选择任务Agent、分解和分配子任务;从任务求解Agent的心智变化角度,详细描述了动态协作任务求解模型实现的6个阶段:任务动态分配、协作意愿产生、协作群体生成、共同计划制定、协作群体行动和结果评估。通过在MAGE等平台上的实验和仿真测试,验证了方法的可行性和有效性。     

基于多Agent的危险源分布式监控系统

针对危险源特别是重大危险源的分布式远程监控预警系统对预防重大事故、应急救援、管理决策等具有重要作用.文中基于多Agent技术,提出了多Agent组(MAG)的概念和模型,并分析其特点及与多Agent系统(MAS)的区别与联系.进而在危险源监控任务的基础上建立了危险源监控的MAG功能模型,即把针对一个危险源的监控任务分解到监控Agent、远程通信Agent、特征提取Agent、预警Agent和界面Agent等5个Agent中,它们自主运行并通过协作构成一个多Agent组共同完成监控任务,由多个分布的MAG构成分布式危险源监控系统.最后基于以上MAG模型和分布式监控系统结构,建立了液化石油气储存装置的危险源监控原型系统,分析了该系统中实现的各个Agent的主要功能.     

多Agent协同机制及其在AeSCM系统中的应用

对多Agent协同问题进行了研究,提出了面向任务熟人联盟(Task Oriented Acquaintance Coalition,TOAC)的协同机制,并将该模型应用到本文构造的电子商务供应链管理系统中．试验分析和实际应用都证实：在电子商务供应链的环境下,能够有效地解决在开放分布的MAS环境中多Agent的社会组织、合作问题求解、任务分配、通信开销瓶颈等问题．     

智能仿真支撑环境H-MAS

引入分布式人工智能中多Agent的概念，将HLA仿真技术框架和多Agent技术相结合性，提出了一种具有智能特性的H－MAS仿真支撑，在此环境下充分利用Agent所具备的驻留性、自主性，反应性，协作性和连续性等诸多特性，实现了一个通用的Agent仿真对象模型，并构造了一个由Agent控制器和KQML语言处理器组成的通信对象，用以完成Agent间的互操作，最后阐述了H－MAS系统的工作流程，实验证明，H－MAS不仅保留了HLA的全部服务功能，而且具有较强的智能化处理能力，是建模与仿较为理想的智能化实验平台。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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