Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The results from the Variational Mode Decomposition (VMD)-based algorithm of a single character "A". (a) The phase information after segmentation; (b) The first mode decomposed by the VMD; (c) The second mode decomposed from the VMD; and (d) the time-varying frequency of the signal in (a).
