A Wave-Spectrum Analysis of Urban Population Density: Entropy, Fractal, and Spatial Localization

Table 4

Autocorrelation function (ACF) and partial autocorrelation function (PACF) values.

Distribution	Function	Correlogram	Suggestion
Exponential distribution	ACF	Tailing: gradual one-sided damping
	PACF	Cutoff at a displacement of 1	Locality
Power-law distribution	ACF	Tailing: slow one-sided damping
	PACF	Tailing: rapid one-sided damping	Action at a distance
Urban density of Hangzhou city	ACF	Damped oscillation
	PACF	Cutoff at a displacement of 1	Locality