9359 search results - page 207 / 1872 » Generalization Algorithms for Second-Order Terms |
187
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SIGIR
2011
ACM
14 years 9 months 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...
169
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ISSAC
2004
Springer
16 years 11 days ago
2004
Springer
We present a streamlined and refined version of Karr’s summation algorithm. Karr’s original approach constructively decides the telescoping problem in ΠΣ-fields, a very ge...
127
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WWW
2004
ACM
16 years 7 months ago
2004
ACM
On-demand broadcast has been supported in the Internet to enhance system scalability. Unfortunately, most of existing on-demand scheduling algorithms did not consider the time con...
185
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KDD
2005
ACM
16 years 7 months ago
2005
ACM
We propose a hybrid, unsupervised document clustering approach that combines a hierarchical clustering algorithm with Expectation Maximization. We developed several heuristics to ...
159
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GECCO
2007
Springer
16 years 1 months ago
2007
Springer
It is widely assumed and observed in experiments that the use of diversity mechanisms in evolutionary algorithms may have a great impact on its running time. Up to now there is no...