3688 search results - page 242 / 738 » Requirements of Phylogenetic Databases |
251
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SIGMOD
2007
ACM
16 years 6 months ago
2007
ACM
A "sparse" data set typically has hundreds or even thousands of attributes, but most objects have non-null values for only a small number of these attributes. A popular ...
266
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SIGMOD
2007
ACM
16 years 6 months ago
2007
ACM
In many business scenarios, record matching is performed across different data sources with the aim of identifying common information shared among these sources. However such need...
234
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SIGMOD
2007
ACM
16 years 6 months ago
2007
ACM
In contrast to classical databases and IR systems, real-world information systems have to deal increasingly with very vague and diverse structures for information management and s...
157
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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 ...
192
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SIGMOD
2003
ACM
16 years 6 months ago
2003
ACM
Spatial database operations are typically performed in two steps. In the filtering step, indexes and the minimum bounding rectangles (MBRs) of the objects are used to quickly dete...