An Adaptive Active Learning Method for Multiclass Imbalanced Data Streams with Concept Drift

被引:0
|
作者
Han, Meng [1 ]
Li, Chunpeng [1 ]
Meng, Fanxing [1 ]
He, Feifei [1 ]
Zhang, Ruihua [1 ]
机构
[1] North Minzu Univ, Sch Comp Sci & Engn, Yinchuan 750021, Peoples R China
来源
APPLIED SCIENCES-BASEL | 2024年 / 14卷 / 16期
关键词
data stream classification; multiclass imbalance; concept drift; ensemble learning; active learning; CLASSIFICATION;
D O I
10.3390/app14167176
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Learning from multiclass imbalanced data streams with concept drift and variable class imbalance ratios under a limited label budget presents new challenges in the field of data mining. To address these challenges, this paper proposes an adaptive active learning method for multiclass imbalanced data streams with concept drift (AdaAL-MID). Firstly, a dynamic label budget strategy under concept drift scenarios is introduced, which allocates label budgets reasonably at different stages of the data stream to effectively handle concept drift. Secondly, an uncertainty-based label request strategy using a dual-margin dynamic threshold matrix is designed to enhance learning opportunities for minority class instances and those that are challenging to classify, and combined with a random strategy, it can estimate the current class imbalance distribution by accessing only a limited number of instance labels. Finally, an instance-adaptive sampling strategy is proposed, which comprehensively considers the imbalance ratio and classification difficulty of instances, and combined with a weighted ensemble strategy, improves the classification performance of the ensemble classifier in imbalanced data streams. Extensive experiments and analyses demonstrate that AdaAL-MID can handle various complex concept drifts and adapt to changes in class imbalance ratios, and it outperforms several state-of-the-art active learning algorithms.
引用
收藏
页数:32
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