The nested chinese restaurant process and bayesian nonparametric inference of topic hierarchies

By David M. Blei, T. Griffiths, Michael I. Jordan. JACM, 2007

731 citations recorded by the source corpus.

We present the nested Chinese restaurant process (nCRP), a stochastic process that assigns probability distributions to ensembles of infinitely deep, infinitely branching trees. We show how this stochastic process can be used as a prior distribution in a Bayesian nonparametric model of document collections. Specifically, we present an application to information retrieval in which documents are modeled as paths down a random tree, and the preferential attachment dynamics of the nCRP leads to clustering of documents according to sharing of topics at multiple levels of abstraction. Given a corpus of documents, a posterior inference algorithm finds an approximation to a posterior distribution over trees, topics and allocations of words to levels of the tree. We demonstrate this algorithm on collections of scientific abstracts from several journals. This model exemplifies a recent trend in statistical machine learning—the use of Bayesian nonparametric methods to infer distributions on flexible data structures.

Subfields: Artificial Intelligence

View Paper: https://www.semanticscholar.org/paper/a36a4755cb17f8add5b11cbc58e5901e6a5c1d0a

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