Improving SVM Performance Using a Linear Combination of Kernels

  • Authors:
  • Laura Dioş;Mihai Oltean;Alexandrina Rogozan;Jean-Pierre Pecuchet

  • Affiliations:
  • Computer Science Department, Babeş-Bolyai University, Cluj-Napoca, Romania and LITIS, Institut National des Sciences Appliquées, Rouen, France;Computer Science Department, Babeş-Bolyai University, Cluj-Napoca, Romania;LITIS, Institut National des Sciences Appliquées, Rouen, France;LITIS, Institut National des Sciences Appliquées, Rouen, France

  • Venue:
  • ICANNGA '07 Proceedings of the 8th international conference on Adaptive and Natural Computing Algorithms, Part II
  • Year:
  • 2007

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Abstract

Standard kernel-based classifiers use only a single kernel, but the real-world applications and the recent developments of various kernel methods have emphasized the need to consider a combination of multiple kernels. We propose an evolutionary approach for finding the optimal weights of a combined kernel used by the Support Vector Machines (SVM) algorithm for solving some particular problems. We use a genetic algorithm (GA) for evolving these weights. The numerical experiments show that the evolved combined kernels (ECKs) perform better than the convex combined kernels (CCKs) for several classification problems.