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  Boosting Algorithms for Maximizing the Soft Margin

Warmuth, M., Glocer, A., & Rätsch, G. (2008). Boosting Algorithms for Maximizing the Soft Margin. In C., Platt, D., Koller, Y., Singer, & S., Roweis (Eds.), Advances in Neural Information Processing Systems 20: 21st Annual Conference on Neural Information Processing Systems 2007 (pp. 1264-1271). Red Hook, NY, USA: Curran.

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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-000C-9E54-4 版のパーマリンク: https://hdl.handle.net/21.11116/0000-000C-9E56-2
資料種別: 会議論文

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 作成者:
Warmuth, MK, 著者
Glocer, AK, 著者
Rätsch, G1, 著者                 
所属:
1Rätsch Group, Friedrich Miescher Laboratory, Max Planck Society, ou_3378052              

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 要旨: We present a novel boosting algorithm, called SoftBoost, designed for sets of bi- nary labeled examples that are not necessarily separable by convex combinations of base hypotheses. Our algorithm achieves robustness by capping the distribu- tions on the examples. Our update of the distribution is motivated by minimizing a relative entropy subject to the capping constraints and constraints on the edges of the obtained base hypotheses. The capping constraints imply a soft margin in the dual optimization problem. Our algorithm produces a convex combination of hypotheses whose soft margin is within δ of its maximum. We employ relative en- tropy projection methods to prove an O( ln N δ2 ) iteration bound for our algorithm, where N is number of examples. We compare our algorithm with other approaches including LPBoost, Brown- Boost, and SmoothBoost. We show that there exist cases where the number of iter- ations required by LPBoost grows linearly in N instead of the logarithmic growth for SoftBoost. In simulation studies we show that our algorithm converges about as fast as LPBoost, faster than BrownBoost, and much faster than SmoothBoost. In a benchmark comparison we illustrate the competitiveness of our approach.

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 日付: 2008-09
 出版の状態: 出版
 ページ: -
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関連イベント

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イベント名: Twenty-First Annual Conference on Neural Information Processing Systems (NIPS 2007)
開催地: Vancouver, BC, Canada
開始日・終了日: 2007-12-03 - 2007-12-06

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出版物 1

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出版物名: Advances in Neural Information Processing Systems 20: 21st Annual Conference on Neural Information Processing Systems 2007
種別: 会議論文集
 著者・編者:
Platt, C, 編集者
Koller, D, 編集者
Singer, Y, 編集者
Roweis, ST, 編集者
所属:
-
出版社, 出版地: Red Hook, NY, USA : Curran
ページ: - 巻号: - 通巻号: - 開始・終了ページ: 1264 - 1271 識別子(ISBN, ISSN, DOIなど): ISBN: 978-1-605-60352-0