A study of convolution tree kernel with local alignment

  • Authors:
  • Lidan Zhang;Kwok-Ping Chan

  • Affiliations:
  • HKU, Hong Kong;HKU, Hong Kong

  • Venue:
  • GEMS '09 Proceedings of the Workshop on Geometrical Models of Natural Language Semantics
  • Year:
  • 2009

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Abstract

This paper discusses a new convolution tree kernel by introducing local alignments. The main idea of the new kernel is to allow some syntactic alternations during each match between subtrees. In this paper, we give an algorithm to calculate the composite kernel. The experiment results show promising improvements on two tasks: semantic role labeling and question classification.