Corrigendum to “A Diagnosis Method for Rotation Machinery Faults Based on Dimensionless Indexes Combined with -Nearest Neighbor Algorithm”

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In the article titled “A Diagnosis Method for Rotation Machinery Faults Based on Dimensionless Indexes Combined with -Nearest Neighbor Algorithm” [1], there was an error in the “Theory” section which should be corrected as follows.

when , , kurtosis index is defined asshould be corrected to

when , , kurtosis index is defined as