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Research on and Implementation of Chinese Structured Information Retrieval

Author: ZhangYiBo
Tutor: SunYuFang
School: Institute of Software
Course: Computer Software and Theory
Keywords: Information Retrieval Structured Query Incidence matrix Query Expansion Chinese information processing
CLC: TP391.3
Type: PhD thesis
Year: 2001
Downloads: 294
Quote: 12
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Abstract


The theme of this study contains two aspects of the Chinese information retrieval with structured information retrieval, document from the Chinese information retrieval system with query similarity calculation, query expansion, query translation and structured information retrieval four points and discussion. The main contribution of this paper is as follows: (1) discusses the Chinese information retrieval system must take the index based on the index of Chinese words. Systematic exposition of the relationship between a new computational search term - based on the the PM search term on the right weight calculation method, and the introduction to the document and query similarity calculation. (2) neighboring relations value of Chinese information retrieval system to retrieve word pairs with mutual information values ??system retrieval performance, experimental results show that When lower search term accuracy of the calculation of the mutual information, the search term on the neighboring relationship more helpful than the value of the mutual information retrieval system performance improvement. (3) The proposed query expansion method based on local information search term associated matrix. Concentrated at the forefront of the document obtained by the initial query, automatic thesauri to build ideological calculated forefront of search terms and their weight values, and added to the initial query query expansion based on the second level associated assumptions. (4) the proposed mutual information based on the search term query translation methods for the search term query translation options which provides a new way, and indirectly, through better search terms related sequence to save the query the phrase constructed a search term goal with a right of re-query languages. (5) analysis of the XML document structure information to improve the performance of traditional information retrieval system to retrieve. By introducing the structure of the document indexing library, the index of the element the library and attribute index library implements Structured Query for XML documents, design a Chinese structured information retrieval system CSIR, and some of its main functions.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Retrieval machine
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