3142 search results - page 429 / 629 » Applied ontology issues |
245
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VLDB
2007
ACM
16 years 6 months ago
2007
ACM
Query generators producing sequences of SQL statements are embedded in many applications. As the execution time of such sequences is often far from optimal, their optimization is ...
265
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SIGMOD
2008
ACM
16 years 6 months ago
2008
ACM
In wireless sensor networks (WSNs), energy consumption and data quality are two important issues due to limited energy resources and the need for accurate data. In this scenario, i...
183
Voted
SIGMOD
2004
ACM
16 years 6 months ago
2004
ACM
We present several methods for mining knowledge from the query logs of the MSN search engine. Using the query logs, we build a time series for each query word or phrase (e.g., `Th...
186
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SIGMOD
2002
ACM
16 years 6 months ago
2002
ACM
Time-parameterized queries (TP queries for short) retrieve (i) the actual result at the time that the query is issued, (ii) the validity period of the result given the current mot...
175
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EDBT
2008
ACM
16 years 6 months ago
2008
ACM
For complex data mining queries, query optimization issues arise, similar to those for the traditional database queries. However, few works have applied the cost-based query optim...