APDM	Adaptive parameterized domain mapping.
STFT	Short-time Fourier transform.
WT	Wavelet transform.
ASTFT	Adaptive short-time Fourier transform.
TFR	Time–frequency representation.
TFA	Time–frequency analysis.
IF	Instantaneous frequency.
GPTF	Generalized parameterized time–frequency transform.
PDM	Parameterized domain mapping.
PDMF	Parameterized domain mapping function.
WOA	Whale optimization algorithm.
MTNCM	Mono-trend nonlinear chirp modes.
GD	Generalized demodulation.
TLOT	Tacholess order tracking.
PSO	Particle swarm optimization.
SSA	Sparrow algorithm optimization.
RTF	Relative trend function.