2026-09-22T02:44:53Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/81569 2023-07-11 col_2142_5131 col_2142_8951 com_2142_5130 com_2142_8950 com_2142_150

Smith, Linda C. Dong, Jianhua 2015-09-25T20:17:19Z 2015-09-25T20:17:19Z 10000-01-01 2000 2000 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. Made available in DSpace on 2015-09-25T20:17:19Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9989982.pdf: 6733342 bytes, checksum: 1cf6b1e03b2d6f6ee7f8c7c138e171a6 (MD5) Previous issue date: 2000 Embargo set by: Seth Robbins for item 82850 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 140 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2000. http://hdl.handle.net/2142/81569 (MiAaPQ)AAI9989982 eng Information Science Combination of Multiple Web Search Results and Its Effect on the Search Performance text Library and Information Science Library and Information Science University of Illinois at Urbana-Champaign Dissertation Ph.D.