远程教育资源智能检索系统的研究与设计

【作者】 刘玉燕；

【导师】 杨喜权；

【作者基本信息】 东北师范大学 ， 计算机软件与理论， 2004， 硕士

【摘要】 在信息技术飞速发展的今天，互联网已成为每个人工作、学习和生活中的一部分，用户上网离不开搜索工具的帮助。搜索工具以一定的策略在互联网中搜集、发现信息，并对信息进行理解、提取、组织和处理，为用户提供检索服务，从而起到信息导航的目的。本文通过分析国内外搜索工具的特点和研究现状，指出了研究设计“远程教育资源智能检索系统（System of Intelligent Search in Distant Education Resource以下简称SISDER）”的必要性和重要性。 论文系统地介绍了SISDER模型研究、设计过程，阐述了SISDER模型的工作原理。SISDER主要由分布式并行PhpDig、信息分析器、信息资源数据库等模块构成，支持基于XML封装的信息检索。SISDER是一个面向远程教育者与远程学习者专用、可调式的Internet中文智能搜索工具，SISDER采用客户机/中间件/服务器（C/M/S）三层体系结构规划设计，由服务器端承载资源管理器、中间件承载智能工作任务（信息分析器、资源搜集代理）、客户端实现用户交互与数据表示，采用C/M/S模式可同时减轻客户机和服务器两端负载，使其协同工作以提高服务质量和效率，并通过对搜索对象属性的语义处理来提高检索性能。 论文同时介绍了SISDER搜索系统的信息封装处理模型，描述了XML信息封装过程，以及PhpDig的多线程PHP编程。PhpDig是一个分布式并行搜索的系统，它对整个SISDER系统的数据来源、信息及时更新起决定作用。更多还原

【Abstract】 With the explosive development of information techno -logy, Internet as one of the most convenience and helpful medium to get information from has become an important part of people’s work, study and daily life. Therefore, Internet searchers which help to find and gather information serve as an essential tool for internet users, and they can also offer searching service by collecting, organizing and disposing information. This article points out the necessity and importance of researching and designing the system of intelligent search in distant education resource (SISDER) by analyzing searchers’ characteristics and present status both domestic and aboard.This thesis introduces SISDER’s model research and designing process as well as its work principle. SISDER is made up of modules such as distributed parallel PhpDig, data encapsulated machine，information source data base and so on, supporting information searching based on XML encapsulation. SISDER is an adjustable Internet intelligent searcher in Chinese facing distance education. It uses three layers of systematic structural project design.The server is used to bear the searching task manager, while the midst to bear the intelligent work task and client. Using C/M/S pattern can lighten the load of both the client and the server to improve the service quality and efficiency, and develop the searching function by handling the semantic meaning of searching object. This thesis also introduces the information handling model of SISDER searching system, and shows the process of the encapsulation of data information and the multithread PHP program of PHPDIG, which is distributed parallel searching system, and is decisive in the data source and information renewal in time of SISDER.更多还原