Beyond Boosting: Recursive ECOC Learning Machines
Identifieur interne : 002832 ( Main/Merge ); précédent : 002831; suivant : 002833Beyond Boosting: Recursive ECOC Learning Machines
Auteurs : Elizabeth Tapia [Argentine] ; José C. González [Espagne] ; Alexander Hütermann [Espagne] ; Javier García [Espagne]Source :
- [ 0302-9743 ]
Abstract
Abstract: We present a wide experimental work evaluating the behaviour of Recursive ECOC (RECOC) [1] learning machines based on Low Density Parity Check (LDPC) coding structures. We show that owing to the iterative decoding algorithms behind LDPC codes, RECOC multiclass learning is progressively achieved. This learning behaviour confirms the existence of new boosting dimension, the one provided by the coding space. We present a method for searching potential good RECOC codes from LDPC ones. Starting from a properly selected LDPC code, we assess the effect of boosting in both weak and strong binary learners. For nearly all domains, we find that boosting a strong learner like a Decision Tree is as effective as boosting a weak one like a Decision Stump. This surprising result substantiates the hypothesis that weakening strong classifiers by boosting has a decorrelation effect, which can be used to improve RECOC learning.
Url:
DOI: 10.1007/978-3-540-25966-4_6
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<front><div type="abstract" xml:lang="en">Abstract: We present a wide experimental work evaluating the behaviour of Recursive ECOC (RECOC) [1] learning machines based on Low Density Parity Check (LDPC) coding structures. We show that owing to the iterative decoding algorithms behind LDPC codes, RECOC multiclass learning is progressively achieved. This learning behaviour confirms the existence of new boosting dimension, the one provided by the coding space. We present a method for searching potential good RECOC codes from LDPC ones. Starting from a properly selected LDPC code, we assess the effect of boosting in both weak and strong binary learners. For nearly all domains, we find that boosting a strong learner like a Decision Tree is as effective as boosting a weak one like a Decision Stump. This surprising result substantiates the hypothesis that weakening strong classifiers by boosting has a decorrelation effect, which can be used to improve RECOC learning.</div>
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