信息网格环境下信息资源的异构集成与透明访问研究

发布时间：2018-05-26 00:03

本文选题：信息网格 + 元数据　；参考：《河海大学》2005年硕士论文

【摘要】：随着科学经济的迅猛发展,各式各样的信息成爆炸式的增长,人类社会进入了“信息爆炸”时代。目前的信息资源具有分布性、异构性、连通性差等特点。本文针对以上信息表示及访问中的不足与问题,重点研究信息网格环境下信息资源的异构集成与透明访问问题。以期解决信息资源分布、异构、连通性差和信息挖掘方面的问题,实现信息的高共享水平,提升其价值。本文在认真分析和总结前人相关工作的基础上,以信息资源的异构集成与透明访问为出发点,重点研究以下三方面的内容: 1.充分论述了信息网格的定义、信息网格下信息资源的特性、信息资源管理的内容、面临的挑战及相关技术。提出了论文论题的解决思路:运用元数据技术,通过XML Schema进行建模,然后将元数据与目录服务结合提供元数据目录服务,最终实现信息网格环境下高效、异构、透明地访问信息资源。 2.研究了信息网格下的元数据体系。元数据是“关于数据的结构化的数据”,通过元数据可以实现信息资源的异构与透明访问。信息资源元数据化的系统工程就是元数据体系。论文在详细分析现有的研究工作的基础上,根据元数据层次结构模型,具体阐述了信息网格环境下信息资源的元数据的内容与体系。同时给出了元数据实现的一般过程。 3.研究如何将元数据结合目录服务技术,以便提供元数据目录服务,用于信息资源元数据的发布、存储、查询及定位等。通过大量的研究工作,论文改进了元数据目录服务的架构和运行流程,重点阐述了其主要功能。论文最后进行了应用实现研究。根据应用背景假设,提出了解决方案。选用J2EE、Apache Tomcat、Netscape Directory Server等开发平台构建了解决方案的体系架构。对部分功能进行实现,给出了运行结果。
[Abstract]:With the rapid development of science and economy, all kinds of information has explosive growth, human society has entered the era of "information explosion". The current information resources have the characteristics of distribution, heterogeneity, poor connectivity and so on. In this paper, we focus on the heterogeneous integration and transparent access of information resources under the information grid environment in view of the shortcomings and problems in the representation and access of information. The purpose of this paper is to solve the problems of information resource distribution, heterogeneity, poor connectivity and information mining, to realize the high level of information sharing and to enhance its value. On the basis of analyzing and summarizing the related work of predecessors, this paper focuses on the following three aspects, starting from the heterogeneous integration and transparent access of information resources: 1. The definition of information grid, the characteristics of information resources under information grid, the contents of information resource management, the challenges faced and the related technologies are discussed. This paper puts forward the solution of the thesis: using metadata technology, modeling through XML Schema, then combining metadata and directory services to provide metadata directory services, finally realizing the efficient and heterogeneous information grid environment. Transparent access to information resources. 2. The metadata system under information grid is studied. Metadata is "structured data about data", through which heterogeneous and transparent access to information resources can be realized. The system engineering of metadata of information resources is metadata system. On the basis of detailed analysis of the existing research work, according to the metadata hierarchy model, this paper expounds the content and system of information resources metadata in the information grid environment. At the same time, the general process of metadata implementation is given. 3. This paper studies how to combine metadata with directory service technology in order to provide metadata directory services for publishing, storing, querying and locating metadata of information resources. Through a lot of research work, this paper improves the architecture and running flow of metadata directory service, and expounds its main functions. At the end of the thesis, the research of application and realization is carried out. According to the application background hypothesis, the solution is proposed. The architecture of the solution is constructed by using J2EE Apache Tomcat Directory Server and other development platforms. Some functions are realized and the running results are given.
【学位授予单位】：河海大学
【学位级别】：硕士
【学位授予年份】：2005
【分类号】：F062.5

【相似文献】