9683 search results - page 422 / 1937 » Predicting query performance |
309
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ADHOC
2008
15 years 7 months ago
2008
Energy efficiency and positional accuracy are often contradictive goals. We propose to decrease power consumption without sacrificing significant accuracy by developing an energy-...
183
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TSP
2008
15 years 6 months ago
2008
We propose a wireless fading channel prediction algorithm for a pilot-symbol aided Orthogonal Frequency Division Multiplexing (OFDM) system. Assuming a doubly selective (time and ...
203
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SOCO
2002
Springer
15 years 6 months ago
2002
Springer
A granular neural Web-based stock prediction agent is developed using the granular neural network (GNN) that can discover fuzzy rules. Stock data sets are downloaded from www.yahoo...
294
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ICDE
2001
IEEE
16 years 8 months ago
2001
IEEE
We study the problem of approximately answering aggregation queries using sampling. We observe that uniform sampling performs poorly when the distribution of the aggregated attrib...
154
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WWW
2008
ACM
16 years 7 months ago
2008
ACM
This paper proposes several vectorial operators for processing XML twig queries, which are easy to be performed and inherently efficient for both Ancestor-Descendant (A-D) and Par...