Least squares support vector machine for class imbalance learning and their applications to fault detection of aircraft engine

2019 ◽  
Vol 84 ◽  
pp. 56-74 ◽  
Author(s):  
Peng-Peng Xi ◽  
Yong-Ping Zhao ◽  
Pei-Xiao Wang ◽  
Zhi-Qiang Li ◽  
Ying-Ting Pan ◽  
...  
Keyword(s):  
Support Vector Machine ◽  
Fault Detection ◽  
Least Squares ◽  
Class Imbalance ◽  
Aircraft Engine ◽  
Support Vector ◽  
Imbalance Learning ◽  
Class Imbalance Learning

Imbalanced Kernel Extreme Learning Machines for Fault Detection of Aircraft Engine

2020 ◽  
Vol 142 (10) ◽  
Author(s):  
Yong-Ping Zhao ◽  
Yao-Bin Chen ◽  
Zhao Hao ◽  
Hao Wang ◽  
Zhe Yang ◽  
...  
Keyword(s):  
Fault Detection ◽  
Class Imbalance ◽  
Aircraft Engine ◽  
Cholesky Factorization ◽  
Learning Machines ◽  
Benchmark Datasets ◽  
Kernel Extreme Learning Machine ◽  
Learning Machine ◽  
Imbalance Learning ◽  
Class Imbalance Learning

Abstract To deal with class imbalance learning (CIL) problems, a novel algorithm is proposed based on kernel extreme learning machine (KELM), named KELM-CIL. To solve it, two algorithms are developed from the dual and primal spaces, respectively, thus yielding D-KELM-CIL and P-KELM-CIL. However, both D-KELM-CIL and P-KELM-CIL are not sparse algorithms. Hence, a sparse strategy based on Cholesky factorization is utilized to realize their sparseness, producing CD-KELM-CIL and CP-KELM-CIL. For large-size problems, a probabilistic trick is applied to accelerate them further, hence obtaining PCD-KELM-CIL and PCP-KELM-CIL. To test the effectiveness and efficacy of the proposed algorithms, experiments on benchmark datasets are carried out. When the proposed algorithms are applied to fault detection of aircraft engine, they show good generalization performance and real-time performance, especially for CP-KELM-CIL and PCP-KELM-CIL, which indicates that they can be developed as candidate techniques for fault detection of aircraft engine.

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