Table 3.
The number of topics arranged in descending determined in each study using latent Dirichlet allocation as a type of unsupervised learning approach
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.