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Exploratory Undersampling for Class-Imbalance Learning

Xu-Ying Liu, Jianxin Wu, Zhi-Hua Zhou·2009·IEEE Transactions on Systems, Man, and Cybernetics, Part B (Cybernetics)

Abstract

Undersampling is a popular method in dealing with class-imbalance problems, which uses only a subset of the majority class and thus is very efficient. The main deficiency is that many majority class examples are ignored. We propose two algorithms to overcome this deficiency. EasyEnsemble samples several subsets from the majority class, trains a learner using each of them, and combines the outputs of those learners. BalanceCascade trains the learners sequentially, where in each step, the majority class examples that are correctly classified by the current trained learners are removed from further consideration. Experimental results show that both methods have higher Area Under the ROC Curve, F-measure, and G-mean values than many existing class-imbalance learning methods. Moreover, they have approximately the same training time as that of undersampling when the same number of weak classifiers is used, which is significantly faster than other methods.

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Metadata

Authors
Liu, X.-Y., Wu, J., & Zhou, Z.-H.
Venue
IEEE Transactions on Systems, Man, and Cybernetics, Part B (Cybernetics)
Published
2009-04
Volume
39
Issue
2
Pages
539-550
ISSN
1083-4419 (ISSN-L)
OpenAlex
W2104167780
Cited by
2,465
References
8
FWCI
57.24
Type
journal article
Language
en
Open access
closed

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Liu, X.-Y., Wu, J., & Zhou, Z.-H. (2009). Exploratory Undersampling for Class-Imbalance Learning. IEEE Transactions on Systems, Man, and Cybernetics, Part B (Cybernetics). https://doi.org/10.1109/tsmcb.2008.2007853

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