文档介绍：本科毕业设计
(2007届)
题目
元搜索引擎--查询结果合成处理模块的设计与实现
学院
计算机学院
专业
计算机科学与技术
班级
030511
学号
学生姓名
指导教师
完成日期
2007年6月
诚信承诺
我谨在此承诺:本人所写的毕业论文《元搜索引擎--查询结果合成处理模块的设计与实现》均系本人独立完成,没有抄袭行为,凡涉及其他作者的观点和材料,均作了注释,若有不实,后果由本人承担。
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摘要
已经成为当今和未来人们获取资源和信息交流的主要场所。然而,上找到需要的信息,是一项极富挑战性的工作。传统的搜索引擎的发展,一方面使其实用性不断加强,部分解决了人们的信息搜索问题;另一方面,其自身的局限性,限制了人们对资源更有效的获取。上获取有价值的信息,就必须有一套高效的解决方案。元搜索引擎正是这种需求的产物:它利用现有的搜索引擎的查询性能,将它们看成一个整体,为用户体提供统一的查询界面与返回结果。
本文首先概述了搜索引擎的工作原理和现状,分析了现有传统搜索引擎的不足,提出未来搜索引擎的研究方向和引入元搜索引擎的必要性;其次概述了元搜索引擎的原理和现状,分析了当前研究元搜索引擎的难点所在,并提出改进方案;接着分析了有关元搜索引擎技术的相关算法,重点实现了轮转法查询结果合成处理,查询结果排序的算法实现。
关键词: 元搜索引擎;查询结果合成处理;查询结果排序
ABSTRACT
The has already e the main place to gain and exchange information at present and in the future. However, it is an extremely challenging work to find the satisfied information in a great deal of information on the . The development of the existing traditional search engine, on one hand strengthened its practicability constantly and solved the information search issue partly; on the other hand, it restricted people to obtain the more effective resources,because of its own limitations. It is necessary to design a series of highly effective solutions for obtaining valuable information from the . The metasearch engine is the exactly technique that can meet the needs, which adopts the query ability of these existing search engines, and regards them as a unity, and provids users with an uniform interface and the returning.
In this paper, the search engine principles and its current development status were firstly discussed, and the disadvantages of existing traditional search engines were also analyzed. Based on the preceding analysis, we have proposed the future research directions and analyzed the necessity of introducing metasearch engine. Secondly,the metasearch engine principles and its current development status were summarized, and the difficulties of research about the current metasearch engines were pointed out. Moreover we have given some m