To the problem of global discovery among domains , a new multiple mobile agents cooperating system model based on fuzzy knowledge exchanging is proposed . the structure , life cycle and roaming strategy of mobile agent are involved in the mobility model 针对域之间的全局资源发现问题，提出了一种基于模糊知识交换的多agent移动合作系统模型（ fkmac人其中的移动模型涉及移动agent的结构、生命周期和移动策略等问题；而合作模型则对agent建立和表达变化或不确定网络环境的信念、信念的消退。
This article first analyzes a paradoxical phenomenon that is predominant in campus lan settings where there is a large amount of idle cpu cycles available while at the same time the computing needs from many researchers ca n ' t be met . it proposes an idea of setting up a campus computing grid with a detailed plan for its implementation , discusses the challenges of upscaling a campus computing grid into an internet computing grid and suggests possible solutions . gram ( grid resource allocation manager ) of globus toolkit 3 . 2 and relative technology on it is studied , and the solutions to extend gram to support task rescheduling and the cooperation type task are proposed . the design and implement of the gram client based on web that is the kernel part of the task anagement module are discussed , and the design of resource discovery module and task transfer module are gived 本文首先分析了校园网环境中存在大量计算资源闲置与科研人员科学计算需要得不到满足之间的矛盾,给出了建立校园计算网格的构想及具体的设计方案,并提出了校园计算网格推广到internet计算网格存在的问题及解决方案;研究了globustoolkit3 . 2中的资源分配管理器gram及其相关技术,并给出了扩展gram对任务再调度和协作型任务支持的解决方案;设计实现了校园计算网格中任务管理模块的核心部分基于web的gram客户端,并介绍了资源发现与任务迁移模块的设计;然后在分析min - min调度算法基础上,借鉴qosguidedmin - min算法的思想,并利用主机资源分类的思想,给出了在负载平衡和时间跨度都有较大改善的balance - qosguidedmin - min算法模型的思想与实现;最后设计实现了调度算法验证模块,并在此模块上对比了改进的算法balance - qosguidedmin - min与min - min算法的调度性能。
This paper gave the definition of the concept of a hybrid library , investigated the project of hybrid library in foreign country , analyzed the feature of it and then described that the central function is identify and discovery , location , reference and delivery . with this idea as the base theory , development are described , including system architecture , metadata standards , content integration , information processing , example products for today ' s hybrid information systems , improving services ways and so on . finally the conclusion is that the management model must be changed in two ways 论文大量查阅了发达国家进行的复合图书馆建设的资料，从复合图书馆的定义出发，调查了国外复合图书馆的研究项目agora 、 builder 、 headline 、 hylife 、 malibu及其进展与结论，分析了复合图书馆的特征，认为图书馆正在变成信息技术和信息服务的合成体，而这种信息服务不再局限于时间和空间位置，桌面信息传递不再仅仅是一种愿望了，因此复合图书馆的主体功能是搜索(资源发现) 、定位、咨询和传递。
Abstract in order to solve the problems of conventional resource discovery framework , a hierarchy - based model was discussed , which combined super - peer model and contact node , a membership join protocol was introduced , and a resource discovery algorithm was proposed based on time to live ( ttl ) limit and cache list 摘要为了解决传统资源发现机制不能很好地适应网络状态、可扩展性较差等问题，在超级节点模型的基础上，结合联系节点，建立了一种基于层次结构的网格模型，设计了成员加入协议，给出了基于跳数限定、缓存列表的资源发现算法。
This thesis introduces the resource discovery algorithm of the current network , analyses the disadvantages of traditional resource discovery algorithms . aimed at the highly dynamic characteristic of mobile network , this thesis puts forward an agent - oriented distributed resource discovery algorithm , ddf ( double - direction - feedback algorithm ) on the base of flooding algorithm 本文介绍了现有网络中的资源发现算法和协议，分析了传统资源发现算法的不足，针对移动网络高度动态性的特点，在泛洪算法的基础上，提出了一种基于移动agent的分布式资源发现算法，设计并实现了基于此算法的资源发现系统。
The grid is a set of newly technique that be constructed on the internet , it merges high - speed internet , high performance calculator , large database , sensors , the long range equipments into a whole , and provide more resource , functions and alternations to technological personnel and ordinary user . there are three principles to measure whether a system can be called grid or not , 1 ) coordinates resources that are not subject to centralized control ; 2 ) using standard , open , general - purpose protocols and interfaces ; 3 ) to deliver nontrivial qualities of service . a system which strictly meet the above three principles can be called grid . rid architecture includes the fabric layer - - local resources interfaces ; connectivity layer - - manage communications ; resource layer - - sharing a single resource ; pool layer - - correspond resources ; application layer ? self - definition grid application . it defined the basic construction of grid , the function and purpose of the architecture , and how to alternate these components do . in the domestic and international grid research and applied realm , digital libraries have played a pivotal role 作者在对数字图书馆网格信息资源和非网格信息资源比较的基础上,论述了一个异构信息同构化集成的跨库检索的方法;构建了网格环境下数字图书馆信息资源管理和信息资源组织的概念模型,并对其中的四个主要步骤进行了论述,包括信息资源描述、信息资源发现、信息资源发布和信息资源命名;论述了元数据在dl网格信息资源组织中的应用,及基于元数据的dl网格信息资源组织的原则;其后对数字图书馆网格信息资源调度和本地资源调度的进行了比较,简述了数字图书馆网格信息资源调度的目的和作用;对数字图书馆内容分发网络和内容分发网格进行论述和比较;最后提出在内容分发网格的基础上,融入数字图书馆自身的特点,构架出数字图书馆内容分发(调度)网格的层次架构。
On the background of middleware , distributed object computing and mobile computing , the author explores the dot in mobile environment at three levels , i . e . , system kernel , application model and service . some targets of the research works include the reflection technology , flexible distributed computing model , and resource discovery in mobile computing environment . some innovative contributions of the dissertation are enumerated as : proposing a general , abstract and theoretic reflective model , i . e . , information - representation - controlling model of reflection 以中间件、分布对象计算和移动计算等相关领域技术为背景，论文从系统核心级、应用模型级、服务设施级等三个层次研究了面向移动环境的分布对象技术，内容主要涉及移动计算环境中的反省技术、灵活的分布计算模型、资源发现等，研究工作取得了如下创新性成果：提出一种通用、抽象的反省理论模型：信息?表示?控制模型。
It also makes a design and implement of the resource discovery system which is based on the algorithm we proposed , and improves the system performance by bringing forward the concept of layered domain model . meanwhile , to improve the flexibility of mobile agent in the resource discovery , this thesis suggests several various travel policies , and revises agent " s travel plan according to travel policies to make the agent adapt to the dynamic characteristic of mobile network more better 通过对系统运行情况的分析，进一步改进了该系统，提出了层次化的域模型概念；同时为提高移动agent在移动网络中资源发现的灵活性，给出了几种不同的移动策略，根据移动策略动态修改移动agent的旅行计划，使之能够更好地适应移动网络的动态性。
