Uncertainty in Artificial Intelligence
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Improved Dynamic Schedules for Belief Propagation
Charles Sutton, Andrew McCallum
Abstract:
Belief propagation and its variants are popular methods for approximate inference, but their running time and even their convergence depend greatly on the schedule used to send the messages. Recently, dynamic update schedules have been shown to converge much faster on hard networks than static schedules, namely the residual BP schedule of Elidan et al. [2006]. But that RBP algorithm wastes message updates: many messages are computed solely to determine their priority, and are never actually performed. In this paper, we show that estimating the residual, rather than calculating it directly, leads to significant decreases in the number of messages required for convergence, and in the total running time. The residual is estimated using an upper bound based on recent work on message errors in BP. On both synthetic and real-world networks, this dramatically decreases the running time of BP, in some cases by a factor of five, without affecting the quality of the solution.
Keywords:
Pages: 376-383
PS Link:
PDF Link: /papers/07/p376-sutton.pdf
BibTex:
@INPROCEEDINGS{Sutton07,
AUTHOR = "Charles Sutton and Andrew McCallum",
TITLE = "Improved Dynamic Schedules for Belief Propagation",
BOOKTITLE = "Proceedings of the Twenty-Third Conference Annual Conference on Uncertainty in Artificial Intelligence (UAI-07)",
PUBLISHER = "AUAI Press",
ADDRESS = "Corvallis, Oregon",
YEAR = "2007",
PAGES = "376--383"
}


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