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Report

Approximating The DCM

By Madsen, Rasmus Elsborg1

From

Department of Informatics and Mathematical Modeling, Technical University of Denmark1

The Dirichlet compound multinomial (DCM), which has recently been shown to be well suited for modeling for word burstiness in documents, is here investigated. A number of conceptual explanations that account for these recent results, are provided. An exponential family approximation of the DCM that is substantially faster to train, while still producing similar probabilities and classification performance is provided.

Language: English
Year: 2005
Types: Report
Keywords

dirichlet approximation DCM

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Analysis