Partial data querying through racing algorithms

Vu-Linh Nguyen, Sébastien Destercke, Marie-Hélène Masson

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

The paper studies the problem of actively learning from instances characterized by imprecise features or imprecise class labels, where by actively learning we understand the possibility to query the precise value of imprecisely specified data. We differ from classical active learning by the fact that in the later, data are either fully precise or completely missing, while in our case they can be partially specified. Such situations can appear when sensor errors are important to encode, or when experts have only specified a subset of possible labels when tagging data. We provide a general active learning technique that can be applied in principle to any model. It is inspired from racing algorithms, in which several models are competing against each others. The main idea of our method is to identify the query that will be the most helpful in identifying the winning model in the competition. After discussing and formalizing the general ideas of our approach, we illustrate it by studying the particular case of binary SVM in the case of interval valued features and set-valued labels. The experimental results indicate that, in comparison to other baselines, racing algorithms provide a faster reduction of the uncertainty in the learning process, especially in the case of imprecise features.

Original languageEnglish
Pages (from-to)36-55
Number of pages20
JournalInternational Journal of Approximate Reasoning
Volume96
DOIs
Publication statusPublished - May 2018

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Keywords

  • Active learning
  • Data querying
  • Interval-valued data
  • Partial data
  • Racing algorithms
  • Set-valued labels

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