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ICML
2007
IEEE
14 years 5 months ago
Mixtures of hierarchical topics with Pachinko allocation
The four-level pachinko allocation model (PAM) (Li & McCallum, 2006) represents correlations among topics using a DAG structure. It does not, however, represent a nested hiera...
David M. Mimno, Wei Li, Andrew McCallum
JACM
2010
208views more  JACM 2010»
13 years 3 months ago
The nested chinese restaurant process and bayesian nonparametric inference of topic hierarchies
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 ...
David M. Blei, Thomas L. Griffiths, Michael I. Jor...
EMNLP
2009
13 years 2 months ago
Nested Named Entity Recognition
Many named entities contain other named entities inside them. Despite this fact, the field of named entity recognition has almost entirely ignored nested named entity recognition,...
Jenny Rose Finkel, Christopher D. Manning
LREC
2008
151views Education» more  LREC 2008»
13 years 6 months ago
A LAF/GrAF based Encoding Scheme for underspecified Representations of syntactic Annotations
Data models and encoding formats for syntactically annotated text corpora need to deal with syntactic ambiguity; underspecified representations are particularly well suited for th...
Manuel Kountz, Ulrich Heid, Kerstin Eckart