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Mathematical Problems in Engineering
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Mathematical Problems in Engineering
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2020
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Article
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Fig 10
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Research Article
Title Fault Diagnosis Method of Gearbox Multifeature Fusion Based on Quadratic Filter and QPSO-KELM
Figure 10
Time-frequency analysis of inner race fault: (a) STFT; (b) CWT; (c) ST; (d) MSSST.
(a)
(b)
(c)
(d)