id	keyword
hungeobull-1071	hilbert
hungeobull-1071	signal
hungeobull-1071	spectrum
hungeobull-1071	frequency
hungeobull-1071	flow
hungeobull-1071	time
hungeobull-1071	analysis
hungeobull-1071	velocity
hungeobull-1071	huang
hungeobull-1071	method
hungeobull-1071	fourier
hungeobull-1071	rhoads
hungeobull-1071	hht