An official website of the United States government
Here's how you know
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.
Influence of the wall insulation thickness on (a) cooling demand and (b) heating demand for buildings with PDRC roof in Harbin, Beijing, Shanghai, Guangzhou, and Kunming.