AAAI Publications, Twenty-Ninth AAAI Conference on Artificial Intelligence

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Improving Exploration in UCT Using Local Manifolds
Sriram Srinivasan, Erik Talvitie, Michael Bowling

Last modified: 2015-03-04

Abstract


Monte-Carlo planning has been proven successful in manysequential decision-making settings, but it suffers from poorexploration when the rewards are sparse. In this paper, weimprove exploration in UCT by generalizing across similarstates using a given distance metric. We show that this algorithm,like UCT, converges asymptotically to the optimalaction. When the state space does not have a natural distancemetric, we show how we can learn a local manifold from thetransition graph of states in the near future. to obtain a distancemetric. On domains inspired by video games, empiricalevidence shows that our algorithm is more sample efficientthan UCT, particularly when rewards are sparse.

Keywords


UCT;Exploration;Manifolds

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