Figure 5.
Time-frequency features extraction. (a) Demonstration of acquiring the frequency-domain observation vectors; (b) Time-frequency diagram after STFT.
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.