AAAI Publications, Thirty-First AAAI Conference on Artificial Intelligence

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Latent Dependency Forest Models
Shanbo Chu, Yong Jiang, Kewei Tu

Last modified: 2017-02-12


Probabilistic modeling is one of the foundations of modern machine learning and artificial intelligence. In this paper, we propose a novel type of probabilistic models named latent dependency forest models (LDFMs). A LDFM models the dependencies between random variables with a forest structure that can change dynamically based on the variable values. It is therefore capable of modeling context-specific independence. We parameterize a LDFM using a first-order non-projective dependency grammar. Learning LDFMs from data can be formulated purely as a parameter learning problem, and hence the difficult problem of model structure learning is circumvented. Our experimental results show that LDFMs are competitive with existing probabilistic models.


probabilistic modeling; latent dependency forest model; non-projective dependency grammar

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