Learning Different User Profile Annotated Rules for Fuzzy Preference Top-k Querying

Authors:
A. Eckhardt;T. Horváth;P. Vojtáš
Affiliations:
Charles University, P. J. Šafárik University, Czech Academy of Science,;Charles University, P. J. Šafárik University, Czech Academy of Science,;Charles University, P. J. Šafárik University, Czech Academy of Science,
Venue:
SUM '07 Proceedings of the 1st international conference on Scalable Uncertainty Management
Year:
2007

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Abstract

Uncertainty querying of large data can be solved by providing top-k answers according to a user fuzzy ranking/scoring function. Usually different users have different fuzzy scoring function --- a user preference model. Main goal of this paper is to assign a user a preference model automatically. To achieve this we decompose user's fuzzy ranking function to ordering of particular attributes and to a combination function. To solve the problem of automatic assignment of user model we design two algorithms, one for learning user preference on particular attribute and second for learning the combination function. Methods were integrated into a Fagin-like top-k querying system with some new heuristics and tested.