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IJCAI
2001
13 years 10 months ago
An Improved Grid-Based Approximation Algorithm for POMDPs
Although a partially observable Markov decision process (POMDP) provides an appealing model for problems of planning under uncertainty, exact algorithms for POMDPs are intractable...
Rong Zhou, Eric A. Hansen
GECCO
2007
Springer
193views Optimization» more  GECCO 2007»
14 years 2 months ago
Approximating covering problems by randomized search heuristics using multi-objective models
The main aim of randomized search heuristics is to produce good approximations of optimal solutions within a small amount of time. In contrast to numerous experimental results, th...
Tobias Friedrich, Nils Hebbinghaus, Frank Neumann,...
SODA
2012
ACM
249views Algorithms» more  SODA 2012»
11 years 11 months ago
Improved competitive ratio for the matroid secretary problem
The Matroid Secretary Problem, introduced by Babaioff et al. (2007), is a generalization of the Classical Secretary Problem. In this problem, elements from a matroid are presente...
Sourav Chakraborty, Oded Lachish
COCOON
2003
Springer
14 years 1 months ago
Randomized Approximation of the Stable Marriage Problem
Abstract. While the original stable marriage problem requires all participants to rank all members of the opposite sex in a strict order, two natural variations are to allow for in...
Magnús M. Halldórsson, Kazuo Iwama, ...
STACS
2010
Springer
13 years 6 months ago
Improved Approximation Guarantees for Weighted Matching in the Semi-Streaming Model
ABSTRACT. We study the maximum weight matching problem in the semi-streaming model, and improve on the currently best one-pass algorithm due to Zelke (Proc. STACS '08, pages 6...
Leah Epstein, Asaf Levin, Julián Mestre, Da...