488 search results - page 43 / 98 » General Database Statistics Using Entropy Maximization |
SIGMOD
2011
ACM
12 years 12 months ago
2011
ACM
Joins are essential for many data analysis tasks, but are not supported directly by the MapReduce paradigm. While there has been progress on equi-joins, implementation of join alg...
GIS
2004
ACM
14 years 10 months ago
2004
ACM
The R*-tree is a state-of-the-art spatial index structure. It has already found its way into commercial systems. The most important improvement of the R*-tree over the original R-...
ISPA
2007
Springer
14 years 3 months ago
2007
Springer
A concept hierarchy is a kind of general form of knowledge representation. Most of the previous researches on describing the concept hierarchy use tree-like crisp taxonomy. However...
SIGIR
2005
ACM
14 years 2 months ago
2005
ACM
State-of-the-art question answering (QA) systems employ termdensity ranking to retrieve answer passages. Such methods often retrieve incorrect passages as relationships among ques...
SIGMOD
2011
ACM
12 years 12 months ago
2011
ACM
Differential privacy is a powerful tool for providing privacypreserving noisy query answers over statistical databases. It guarantees that the distribution of noisy query answers...