Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The local multifractal spectrums based on singularity exponent, i.e., the f(α) curves. Note: A local multifractal spectrum is a unimodal curve, which can be used to reflect the aggregation or diffusion of a city’s evolution. (a) 1984; (b) 1994; (c) 2006; (d) 2015.
