With the continuous development of biomedical technology, non-contact life signal monitoring techniques have gradually gained attention. This paper proposes a Variational Mode Decomposition (VMD) ...

The flow chart of the feature extraction method of SRN based on BOA-VMD and SE is shown in Figure 2. The specific implementation steps of the proposed feature extraction method for SRN are as follows: ...

In view of the incipient fault characteristics are difficult to be extracted from the raw bearing fault signals, an incipient bearing fault diagnosis method based on parameter-adaptive variational ...