12519 search results - page 2281 / 2504 » Approximation Problems Categories |
247
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SIGMOD
2009
ACM
16 years 5 months ago
2009
ACM
Research has investigated mappings among data sources under two perspectives. On one side, there are studies of practical tools for schema mapping generation; these focus on algor...
241
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SIGMOD
2009
ACM
16 years 5 months ago
2009
ACM
This paper addresses the problem of monitoring the k nearest neighbors to a dynamically changing path in road networks. Given a destination where a user is going to, this new quer...
252
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SIGMOD
2009
ACM
16 years 5 months ago
2009
ACM
Ranking queries are essential tools to process large amounts of probabilistic data that encode exponentially many possible deterministic instances. In many applications where unce...
227
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SIGMOD
2009
ACM
16 years 5 months ago
2009
ACM
Reachability queries on large directed graphs have attracted much attention recently. The existing work either uses spanning structures, such as chains or trees, to compress the c...
265
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SIGMOD
2009
ACM
16 years 5 months ago
2009
ACM
Ontology matching, aiming to obtain semantic correspondences between two ontologies, has played a key role in data exchange, data integration and metadata management. Among numero...