4276 search results - page 647 / 856 » Techniques for Empirical Validation |
153
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SIGMOD
2004
ACM
16 years 6 months ago
2004
ACM
Block-level sampling is far more efficient than true uniform-random sampling over a large database, but prone to significant errors if used to create database statistics. In this ...
151
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SIGMOD
2003
ACM
16 years 6 months ago
2003
ACM
To ensure high data quality, data warehouses must validate and cleanse incoming data tuples from external sources. In many situations, clean tuples must match acceptable tuples in...
176
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SIGMOD
2003
ACM
16 years 6 months ago
2003
ACM
We describe the design and implementation of a new data layout scheme, called multi-dimensional clustering, in DB2 Universal Database Version 8. Many applications, e.g., OLAP and ...
178
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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...
223
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ICDE
2010
IEEE
16 years 6 months ago
2010
IEEE
The Voronoi diagram is an important technique for answering nearest-neighbor queries for spatial databases. In this paper, we study how the Voronoi diagram can be used on uncertain...