Title
Dynamic selection of enumeration strategies for solving constraint satisfaction problems
Date Issued
01 December 2012
Access level
metadata only access
Resource Type
journal article
Author(s)
Crawford B.
Castro C.
Monfroy E.
Palma W.
Paredes F.
Universidad Autónoma de Chile
Abstract
The main goal concerning Constraint Satisfaction Problems is to determine a value assignment for variables satisfying a set of constraints, or otherwise, to conclude that such an assignment does not exist (the set of constraints is unsatisfiable). In the Constraint Programming resolution process, it is known that the order in which the variables are assigned have a significant impact in terms of computational cost. In this paper we propose a new framework for guiding the classical Constraint Programming resolution process. Such a framework is able to measure the resolution process, using some indicators, in order to perform on-the-fly replacements of variable/value ordering heuristics exhibiting poor performances. The replacement is performed depending on a quality rank, which is computed by means of a choice function-based Hyperheuristic, where its parameters are fine-tuned by a Genetic Algorithm which trains the choice function carrying out a sampling phase. The experimental results show the effectiveness of our approach where our combination of strategies outperforms the use of individual strategies.
Start page
106
End page
128
Volume
15
Issue
2
Language
English
OCDE Knowledge area
Sistemas de automatización, Sistemas de control Ingeniería de sistemas y comunicaciones
Scopus EID
2-s2.0-84878619125
Source
Romanian Journal of Information Science and Technology
ISSN of the container
14538245
Sources of information: Directorio de Producción Científica Scopus