Seminar by Dr. Akihiro Kishimoto (IBM Ireland Research Lab)

Wed, 26 Jul 2017 14:00 - 15:00 JST

RIKEN Center for Advanced Intelligence Project (AIP)

Nihonbashi 1-chome Mitsui Building, 15th floor, 1-4-1 Nihonbashi, Chuo-ku, Tokyo 103-0027, Japan


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Speaker: Akihiro Kishimoto, IBM Ireland Research Lab

Title: Efficient AND/OR search algorithms for exact MAP inference task over graphical models

Abstract: Graphical models provide a powerful framework for reasoning with probabilistic information. Combinatorial maximization, or maximum a posteriori (MAP) tasks arise in many applications and often can be efficiently solved by search schemes, especially in the context of AND/OR search spaces that are sensitive to the underlying problem structure.
In this talk, I present the power of limited memory best-first search over AND/OR search spaces, named RBFAOO, which performs exact MAP inference over graphical models. I also present parallelized versions of RBFAOO which run in both shared-memory and distributed-memory environments. I show that RBFAOO is empirically superior to the current state-of-the-art approaches based on AND/OR search, especially on very hard problem instances.

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