An Ensemble Extended Belief Rule Base Decision Model for Imbalanced Classification Problems

Long-Hao Yang, Tian-Yu Ren, Fei-Fei Ye, Peter Nicholl, Ying-Ming Wang, Haitian Lu

Research output: Contribution to journalArticlepeer-review

Abstract

Class imbalance is a common problem in real-world applications and usually poses a major challenge to artificial intelligent (AI)-based decision models. The present work introduces a novel ensemble decision model which utilizes an explainable and fast-growing rule-based system, called extended belief rule base (EBRB) decision model, to alleviate the impact of class imbalance, where the proposed ensemble EBRB model includes two core components: a diversity-based base EBRB construction scheme and a consistency-based ensemble EBRB inference scheme. Specifically, for the purpose of enhancing diversity in the construction scheme, various kinds of oversampling techniques are applied to construct diverse base EBRBs firstly, followed by the calculation of attribute weights based on information gain. As for the inference scheme, the proposed ensemble EBRB model aims to produce inferential outputs not only integrating the rules activated from all base EBRBs, but also taking into consideration the consistency of the activated rules. In experimental study, twenty-six imbalanced classification datasets are used to demonstrate the effectiveness of the proposed ensemble EBRB decision model. Results demonstrate that the proposed model outperforms conventional EBRB systems and other typical imbalanced classifiers.
Original languageEnglish
Article number108410
Pages (from-to)1-15
Number of pages15
JournalKnowledge-Based Systems
Volume242
Early online date15 Feb 2022
DOIs
Publication statusPublished - 22 Apr 2022

Bibliographical note

Funding Information:
This research was supported by the National Natural Science Foundation of China (Nos. 72001043 and 61773123 ), the Natural Science Foundation of Fujian Province , China (No. 2020J05122 ), the Humanities and Social Science Foundation of the Ministry of Education , China (No. 20YJC630188 ), and the Social Science Foundation of Fujian Province, China (No. FJ2019C032 ).

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Belief rule base
  • Imbalanced classification
  • Diversity
  • Inconsistency
  • Oversampling

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