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.
Visualization map of the institution. There are 502 nodes (circles) in the figure, representing 502 institutions. The larger the circle, the more documents produced by that institution. A connection between 2 nodes means that 2 institutions appear in a document at the same time, that is, 2 institutions have a cooperative relationship in this document. There were 1,068 collaboration between these institutions.
