Paper: Type-Based MCMC

ACL ID N10-1082
Title Type-Based MCMC
Venue Human Language Technologies
Session Main Conference
Year 2010
Authors

Most existing algorithms for learning latent- variable models—such as EM and existing Gibbs samplers—are token-based, meaning that they update the variables associated with one sentence at a time. The incremental na- ture of these methods makes them suscepti- ble to local optima/slow mixing. In this paper, we introduce a type-based sampler, which up- dates a block of variables, identified by a type, which spans multiple sentences. We show im- provements on part-of-speech induction, word segmentation, and learning tree-substitution grammars.