Figure 6.
Comparison with the subtopic retrieval method on 2006’s topics. The x-axis presents the evaluation measures, where “06a”, “06b” and “06c” in the right figure stand for three baselines corresponding to Okapi06a, Okapi06b and Okapi06c.
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.