Figure 5.
The three-level decomposition tree for discrete wavelet transform. A3 with the frequency range of 0–0.625 Hz was selected to compute wavelet energy.
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.