826 search results - page 18 / 166 » Query Performance Prediction: Evaluation Contrasted with Eff... |
109
Voted
EDBT
2012
ACM
13 years 2 months ago
2012
ACM
We present an effective optimization framework for general SQLlike map-reduce queries, which is based on a novel query algebra and uses a small number of higher-order physical ope...
90
Voted
SIGIR
2006
ACM
15 years 5 months ago
2006
ACM
We present a novel language modeling approach to capturing the query reformulation behavior of Web search users. Based on a framework that categorizes eight different types of “...
109
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SIGIR
2010
ACM
14 years 12 months ago
2010
ACM
In information retrieval (IR), research aiming to reduce the cost of retrieval system evaluations has been conducted along two lines: (i) the evaluation of IR systems with reduced...
SBBD
2003
15 years 1 months ago
2003
A common requirement of many scientific applications is the ability to process queries involving expensive predicates corresponding to user programs. Optimizing such queries is ha...
115
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WWW
2008
ACM
14 years 11 months ago
2008
ACM
We propose a novel Partition Path-Based (PPB) grouping strategy to store compressed XML data in a stream of blocks. In addition, we employ a minimal indexing scheme called Block S...