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Explorations in Automatic Thesaurus Discovery (Hardcover, 1994 ed.)
Loot Price: R4,756
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Explorations in Automatic Thesaurus Discovery (Hardcover, 1994 ed.)
Series: The Springer International Series in Engineering and Computer Science, 278
Expected to ship within 10 - 15 working days
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Explorations in Automatic Thesaurus Discovery presents an automated
method for creating a first-draft thesaurus from raw text. It
describes natural processing steps of tokenization, surface
syntactic analysis, and syntactic attribute extraction. From these
attributes, word and term similarity is calculated and a thesaurus
is created showing important common terms and their relation to
each other, common verb--noun pairings, common expressions, and
word family members. The techniques are tested on twenty different
corpora ranging from baseball newsgroups, assassination archives,
medical X-ray reports, abstracts on AIDS, to encyclopedia articles
on animals, even on the text of the book itself. The corpora range
from 40,000 to 6 million characters of text, and results are
presented for each in the Appendix. The methods described in the
book have undergone extensive evaluation. Their time and space
complexity are shown to be modest. The results are shown to
converge to a stable state as the corpus grows. The similarities
calculated are compared to those produced by psychological testing.
A method of evaluation using Artificial Synonyms is tested. Gold
Standards evaluation show that techniques significantly outperform
non-linguistic-based techniques for the most important words in
corpora. Explorations in Automatic Thesaurus Discovery includes
applications to the fields of information retrieval using
established testbeds, existing thesaural enrichment, semantic
analysis. Also included are applications showing how to create,
implement, and test a first-draft thesaurus.
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