Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu


  • Zhi-Hua ZhouEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_568


Boosting is a kind of ensemble methods [13] which produces a strong learner that is capable of making very accurate predictions by combining rough and moderately inaccurate learners (which are called as base learners or weak learners). In particular, boosting sequentially trains a series of base learners by using a base learning algorithm, where the training examples wrongly predicted by a base learner will receive more attention from the successive base learner. After that, it generates a final strong learner through a weighted combination of these base learners.

Historical Background

In 1989, Kearns and Valiant posed an interesting theoretical question, i.e., whether two complexity classes, weakly learnable and strongly learnable problems, are equal. In other words, whether a weak learning algorithm that performs just slightly better than random guess can be boosted into an arbitrarily accurate strong learning algorithm. In 1990, Schapire [9] proved that the answer to the...

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Recommended Reading

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.National Key Lab for Novel Software TechnologyNanjing UniversityNanjingChina

Section editors and affiliations

  • Kyuseok Shim
    • 1
  1. 1.School of Elec. Eng. and Computer ScienceSeoul National Univ.SeoulRepublic of Korea