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.
Evaluation with respect to HealthMap gazetteer tags. F1 score with respect to HealthMap gazetteer tags for several values of λ (red plain line). F1 scores among words with visible lexical index (green dashed line) and among words with hidden dictionary's index (blue pointed-dashed line)
