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.
Percentage of average overlapping expansion terms for fifteen high-overlapping pairs of term ranking algorithms with the default parameter setting (R = 10, E = 25). IDF: inverse document frequency, EMIM: expected mutual information measure, LCA: local context analysis, KLD: Knullback-Leibler divergence, RSV: Robertson selection value.
