GA-TVRC: a novel relational time varying classifier to extract temporal information using genetic algorithms

  • Authors:
  • Ismail Günes;Zehra Çataltepe;Şule Gündüz Öğüdücü

  • Affiliations:
  • BILGEM UEKAE, TUBITAK, Gebze, Kocaeli, Turkey;Computer Engineering Department, Istanbul Technical University, Istanbul, Turkey;Computer Engineering Department, Istanbul Technical University, Istanbul, Turkey

  • Venue:
  • MLDM'11 Proceedings of the 7th international conference on Machine learning and data mining in pattern recognition
  • Year:
  • 2011

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Abstract

Almost all networks in real world evolve over time, and analysis of these temporal changes may help in understanding or explanation of some properties or processes of a network. This paper presents GA-TVRC, a novel Relational Time Varying Classifier which uses Genetic Algorithms to extract temporal information. GA-TVRC uses Evolutionary Strategies to optimize the influence of each previous time period on classification of new nodes. A Relational Bayesian Classifier (RBC) that is proposed by Neville et.al. [3] is utilized to compute the fitness function. The performance of GA-TVRC is compared with both the RBC, which ignores the time effect and the time varying relational classifier (TVRC) that is proposed by Sharan and Neville [20]. TVRC improves the RBC by taking the time effect into account using different predetermined weights. According to the experiments on two real world datasets, GA-TVRC extracts time effect better than the previous methods and improves the classification performance by up to 5% compared to TVRC and up to 10% compared to RBC.