Table 6 The nonlinear CVs of EBSs
From: Changes in bowel sounds of inpatients undergoing general anesthesia
| Nonlinear CVs | Calculation methods | Physiological significance |
|---|---|---|
| RR | The percentage of recurrent points falling within the specified radius | Reflect the similarity of signal fluctuation |
| Lmean | The mean of the diagonal lengths in recurrence plot | Related to the separation velocity of adjacent trajectories |
| ENTR | The Shannon information entropy of all diagonal line lengths | A measure of signal complexity |
| TT | The average length of vertical line structures | Degree of system stability |