Table 4 Main points of fractal-based spatial analysis for COVID-19 pandemic in Chinese mainland.

From: Multifractal scaling analyses of the spatial diffusion pattern of COVID-19 pandemic in Chinese mainland

Item

Feature

Inference

Log-log plot

Straight-line trend

Fractal pattern

Fractal parameters

D0 > D1 > D2

Multifractal scaling

Global multifractal spectrum, D(q) curve

Inverse S-shaped curve

Multifractal diffusion

Local multifractal spectrum, f(α) curve

Right-leaning unimodal curve

Global aggregation, and local diffusion

Fractal dimension growth curves

Quasi S-shaped curves

Prevention and control measures are effective

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