Combination of Multiple Web Search Results and Its Effect on the Search Performance
Dong, Jianhua
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Permalink
https://hdl.handle.net/2142/81569
Description
Title
Combination of Multiple Web Search Results and Its Effect on the Search Performance
Author(s)
Dong, Jianhua
Issue Date
2000
Doctoral Committee Chair(s)
Smith, Linda C.
Department of Study
Library and Information Science
Discipline
Library and Information Science
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Information Science
Language
eng
Abstract
The study shows that hypothesis one is supported when the value of relevancy threshold is set to be documents that are at least partially relevant, that hypothesis two is not supported, and that hypotheses three and four are not supported in most cases, but supported when the original results are involved in the comparisons. Some other findings are: complex queries are more likely to retrieve documents from more search engines; more than 15% of retrieved Web links are inactive for various reasons; on the average combining more evidence sources does improve Web IR performance. The study shows that the best result of improvement is achieved at the 2-way level, combining the ranked output of two search engines.
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