Paper Info
Title
T-SMOTE: Temporal-oriented Synthetic Minority Oversampling Technique for Imbalanced Time Series Classification.
Abstract
Time series classification is a popular and important topic in machine learning, and it suffers from the class imbalance problem in many real-world applications. In this paper, to address the class imbalance problem, we propose a novel and practical oversampling method named T-SMOTE, which can make full use of the temporal information of time-series data. In particular, for each sample of minority class, T-SMOTE generates multiple samples that are close to class border. Then, based on those samples near class border, T-SMOTE synthesizes more samples. Finally, a weighted sampling method is called on both generated samples near class border and synthetic samples. Extensive experiments on a diverse set of both univariate and multivariate time-series datasets demonstrate that T-SMOTE consistently outperforms the current state-of-the-art methods on imbalanced time series classification. More encouragingly, our empirical evaluations show that T-SMOTE performs better in the scenario of early prediction, an important application scenario in industry, which indicates that T-SMOTE could bring benefits in practice.
Year
DOI
Venue
2022
10.24963/ijcai.2022/334
European Conference on Artificial Intelligence
Keywords
DocType
Citations 
Data Mining: Class Imbalance and Unequal Cost,Data Mining: Mining Spatial and/or Temporal Data
Conference
0
PageRank 
References 
Authors
0.34
0
7
Name
Order
Citations
PageRank
Pu Zhao13211.73
Chuan Luo249641.38
Bo Qiao3339.09
Lu Wang400.34
Saravan Rajmohan501.69
Qingwei Lin628527.76
Dongmei Zhang71439132.94