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Semantic Similarity Group By Operators for Metric Data

  • Natan A. Laverde
  • Mirela T. Cazzolato
  • Agma J. M. Traina
  • Caetano TrainaJr.
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10609)

Abstract

Grouping operators summarize data in DBMS arranging elements in groups using identity comparisons. However, for metric data, grouping by identity is seldom useful, since adopting the concept of similarity is often a better fit. There are operators that can group data elements using similarity. However, the existing operators do not achieve good results for certain data domains or distributions. The major contributions of this work are a novel operator called the SGB-Vote that assign groups using an election involving already assigned groups and an extension for current operators bounds each group to a maximum amount of the nearest neighbors. The operators were implemented in a framework and evaluated using real and synthetic datasets from diverse domains considering both quality of and execution time. The results obtained show that the proposed operators produce higher quality groups in all tested datasets and highlight that the operators can efficiently run inside a DBMS.

Keywords

Similarity Group By Grouping Similarity comparison Metric data 

Notes

Acknowledgments

This research is partially funded by FAPESP, CNPq, CAPES, and the RESCUER Project, as well as by the European Commission (Grant: 614154) and by the CNPq/MCTI (Grant: 490084/2013-3).

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Natan A. Laverde
    • 1
  • Mirela T. Cazzolato
    • 1
  • Agma J. M. Traina
    • 1
  • Caetano TrainaJr.
    • 1
  1. 1.Institute of Mathematics and Computer SciencesUniversity of Sao PauloSao CarlosBrazil

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