January 2008
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14 Reads
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147 Citations
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January 2008
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14 Reads
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147 Citations
... The Pitman-Yor process, a generalization of the Dirichlet process, is a flexible two-parameter distribution over discrete distributions. Pitman-Yor processes have been used to study how online social networks grow 40 , count object frequencies for image segmentation 41 , build species sampling models in ecology 42 , and can model a wide range of discrete distributions including heavy-tail discrete distributions. A Pitman-Yor process induces an 'exchangeable partition' 43 of arbitrary size. ...
January 2008