Posts Tagged ‘topic models’

Satisfying Needs by Diversifying Topics

Thursday, February 24th, 2011

When retrieving documents for a search query, a simplistic approach that ranks the most relevant documents highest will leave users completely unsatisfied if it incorrectly interprets the query. Incorrect interpretation is an inevitable possibility when dealing with ambiguous queries, which in some experiments were shown to represent over 16% of all queries. To address this we can apply a topic modeling algorithm to the fetched search results and then use a reordering algorithm to ensure we highly rank both relevant documents and topics with a high probability of being in different topics.

Diversification System Diagram

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Are our Preferences in a Sub-Space?

Sunday, January 30th, 2011

The web is really big, but when one searches for information the topics they are looking for exist within a much smaller portion of the web. A system that knows our individual preferences can optimize its document search, by starting its search from documents that we likely prefer.

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