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Sinead Williamson
Thursday 19 January 2006, 15:00-16:00
Lexicographic text analysis using non-negative factorisation techniques
- đ¤ Speaker: Sinead Williamson
- đ Date & Time: Thursday 19 January 2006, 15:00 - 16:00
- đ Venue: Ryle Seminar Room, Cavendish Laboratory
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Phil Cowans
Abstract
Non-negative matrix factorisation (NNMF) is proposed as an alternative to Principle Component Analysis for use in latent semantic analysis of large text corpora. NNMF recognises the inherent non-negativity of language data, and has been shown to organise data into easily understood concept groups of words. The representation of articles as a linear superposition of such concept groups provides an intuitive method for comparison between articles.
Series This talk is part of the Inference Group series.
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