515 search results - page 46 / 103 » Query Decomposition, Optimization and Processing in Multidat... |
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FOIKS
2004
Springer
15 years 3 months ago
2004
Springer
Abstract. We give a general framework for approximate query processing in semistructured databases. We focus on regular path queries, which are the integral part of most of the que...
104
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ICDE
2005
IEEE
15 years 3 months ago
2005
IEEE
Current federated systems deploy cost-based query optimization mechanisms; i.e., the optimizer selects a global query plan with the lowest cost to execute. Thus, cost functions in...
WEBI
2010
Springer
14 years 7 months ago
2010
Springer
Abstract--Expertise matching, aiming to find the alignment between experts and queries, is a common problem in many real applications such as conference paper-reviewer assignment, ...
ADBIS
2004
Springer
15 years 3 months ago
2004
Springer
Abstract. Query reformulation techniques based on semantic knowledge have been used in two ways in database management systems, namely for query optimization and for data integrati...
77
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VTC
2008
IEEE
15 years 4 months ago
2008
IEEE
— In this paper, we propose a two-step precoding approach for multiple-input multiple-output (MIMO) systems by dividing the precoding process into two steps: spatial multiplexing...