Information Retrieval - ad-teaching.infor...
Information Retrieval - ad-teaching.infor... Information Retrieval - ad-teaching.infor...
from ad.teaching.informatik.uni.freiburg.de
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12.07.2015
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Synonyms 4/4• Solution 3: Automatic methods– The text itself also tells us which words are related– For example: pizza delivery webpagesthey have similar contents (and style)some use the word Bringdienstsome use the word Lieferservice– Latent Semantic Indexing (LSI) tries to find suchrelations, based on similar context, automatically– This is the topic of today's lecture !8
Latent Semantic Indexing 1/9• An example term-document matrix9
- Page 1 and 2: Information RetrievalWS 2012 / 2013
- Page 3 and 4: Experiences with ES#7 (cookies, UTF
- Page 5 and 6: Synonyms 1/4• Problem: another so
- Page 7: Synonyms 3/4• Solution 2: Track u
- Page 11 and 12: Latent Semantic Indexing 3/9• If
- Page 13: Latent Semantic Indexing 5/9• Eig
- Page 17: Latent Semantic Indexing 8/9• Wit
- Page 20 and 21: Octave 2/5• Use the Octave shell
- Page 22 and 23: Octave 4/5• Sparse matrices- Our
- Page 24: References• Further reading- Text
Latent Semantic Indexing 1/9• An example term-document matrix9
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