588 search results - page 21 / 118 » Positive higher-order queries |
ALT
2003
Springer
15 years 10 months ago
2003
Springer
A pattern is a finite string of constant and variable symbols. The erasing language generated by a pattern p is the set of all strings that can be obtained by substituting (possib...
142
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ICDT
2010
ACM
15 years 3 months ago
2010
ACM
When a query is evaluated under bag semantics, each answer is returned as many times as it has derivations. Bag semantics has long been recognized as important, especially when ag...
SIGIR
2002
ACM
15 years 1 months ago
2002
ACM
We develop a method for predicting query performance by computing the relative entropy between a query language model and the corresponding collection language model. The resultin...
TAMC
2007
Springer
15 years 8 months ago
2007
Springer
Abstract. Formal language learning models have been widely investigated in the last four decades. But it was not until recently that the model of learning from corrections was intr...
102
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SIGIR
2008
ACM
15 years 1 months ago
2008
ACM
We propose an expert finding method based on assumption of sequential dependence between a candidate expert and the query terms in the scope of a document. We assume that the stre...