Table 2.

Fourier series analysis of normal, taut, and slippery pulses.

Pulse type	Fourier series analysis of spatiotemporal pulse waves
	Temporal analysis	Spatial analysis	Spatial harmonic ratio sequence
Normal pulse	Undistinguishable	Base and first harmonic share importance	Three sequences are well distributed
Taut pulse		Behaves as a rectangular pulse with dominant base and little harmonics	Base is high, and others merged together
Slippery pulse		The first harmonic can be higher or lower than the second one	Three sequences intersect each other