FIGURE 5.
The 2014 gradient among provinces of Eastern, Central and Western China. The y-axes are magnitudes and x-axes directions of this vector-valued function.
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.