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Learning Qualitative Constraint Networks

Authors Malek Mouhoub , Hamad Al Marri, Eisa Alanazi

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Author Details

Malek Mouhoub
  • University of Regina 3737 Wascana Parkway, Regina SK S4V 0A2, Canada
Hamad Al Marri
  • University of Regina 3737 Wascana Parkway, Regina SK S4V 0A2, Canada
Eisa Alanazi
  • Um Al Qura University Aif Road, 21955, Mecca, Makkah Province, Saudi Arabia

Funding

  • Mouhoub, Malek: Natural Sciences and Engineering Research Council of Canada (NSERC), RGPIN-2016-05673

Cite AsGet BibTex

Malek Mouhoub, Hamad Al Marri, and Eisa Alanazi. Learning Qualitative Constraint Networks. In 25th International Symposium on Temporal Representation and Reasoning (TIME 2018). Leibniz International Proceedings in Informatics (LIPIcs), Volume 120, pp. 19:1-19:13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)
https://doi.org/10.4230/LIPIcs.TIME.2018.19

Abstract

Temporal and spatial reasoning is a fundamental task in artificial intelligence and its related areas including scheduling, planning and Geographic Information Systems (GIS). In these applications, we often deal with incomplete and qualitative information. In this regard, the symbolic representation of time and space using Qualitative Constraint Networks (QCNs) is therefore substantial. We propose a new algorithm for learning a QCN from a non expert. The learning process includes different cases where querying the user is an essential task. Here, membership queries are asked in order to elicit temporal or spatial relationships between pairs of temporal or spatial entities. During this acquisition process, constraint propagation through Path Consistency (PC) is performed in order to reduce the number of membership queries needed to reach the target QCN. We use the learning theory machinery to prove some limits on learning path consistent QCNs from queries. The time performances of our algorithm have been experimentally evaluated using different scenarios.

Subject Classification

ACM Subject Classification
  • Computing methodologies → Temporal reasoning
Keywords
  • Temporal Reasoning
  • Qualitative Constraint Network (QCN)
  • Constraint Learning
  • Path Consistency
  • Constraint Propagation

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