Prioritised fuzzy constraint satisfaction problems: axioms, instantiation and validation

  • Authors:

  • Xudong Luo;Jimmy Ho-man Lee;Ho-fung Leung;Nicholas R. Jennings

  • Affiliations:

  • Department of Electronics and Computer Science, The University of Southampton, Highfield, Southampton SO17 1BJ, UK;Department of Computer Science and Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, People's Republic of China;Department of Computer Science and Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, People's Republic of China;Department of Electronics and Computer Science, The University of Southampton, Highfield, Southampton SO17 1BJ, UK

  • Venue:
  • Fuzzy Sets and Systems - Theme: Multicriteria decision
  • Year:
  • 2003

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Abstract

This paper identifies a generic axiom framework for prioritised fuzzy constraint satisfaction problems (PFCSPs), and proposes methods to instantiate it (i.e., to construct specific schemes which obey the generic axiom framework). In particular, we give five methods to construct the priority operators that are used for calculating the local satisfaction degree of a prioritised fuzzy constraint, and identify priority T-norm operators that can be used for calculating the global satisfaction degree of a prioritised fuzzy constraint problem. Moreover, a number of numerical examples and real examples are used to validate our system, and thus we further obtain some insights into our system. In addition, we explore the relationship between weight schemes and prioritised FCSP schemes, and reveal that the weighted FCSP schemes are the dual of prioritised FCSP schemes, which can, correspondingly, be called posterioritised FCSP schemes.