55 search results - page 4 / 11 » Lower-bounding term frequency normalization |
85
Voted
SIGIR
2011
ACM
14 years 12 days ago
2011
ACM
We reveal that the Okapi BM25 retrieval function tends to overly penalize very long documents. To address this problem, we present a simple yet effective extension of BM25, namel...
ICDCS
2010
IEEE
15 years 1 months ago
2010
IEEE
—Wireless communication is particularly vulnerable to signal jamming attacks. Spread spectrum mitigates such problem by spreading normal narrowband signals over a much wider band...
CSCW
2011
ACM
14 years 4 months ago
2011
ACM
A microblogged stream is delivered over time, providing an ongoing commentary of topics, trends, and issues. In this article, we present two methods of finding temporal topics wi...
61
Voted
TCOM
2010
14 years 4 months ago
2010
Abstract--The optimization of the pilot overhead in singleuser wireless fading channels is investigated, and the dependence of this overhead on various system parameters of interes...
182
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SIGMOD
2008
ACM
15 years 9 months ago
2008
ACM
Approximate queries on a collection of strings are important in many applications such as record linkage, spell checking, and Web search, where inconsistencies and errors exist in...