254 search results - page 18 / 51 » On the Limitations of Provenance for Queries With Difference |
CIKM
2004
Springer
14 years 1 months ago
2004
Springer
At present, most of the state-of-the-art solutions for XML access controls are either (1) document-level access control techniques that are too limited to support fine-grained sec...
BDA
2003
13 years 9 months ago
2003
Pervasive computing introduces data management requirements that must be tackled in a growingvariety of lightweight computing devices. Personal folders on chip, networks of sensor...
ICDE
2006
IEEE
14 years 9 months ago
2006
IEEE
Aggregate monitoring over data streams is attracting more and more attention in research community due to its broad potential applications. Existing methods suffer two problems, 1...
EDBT
2009
ACM
14 years 2 months ago
2009
ACM
In this paper we consider distributed K-Nearest Neighbor (KNN) search and range query processing in high dimensional data. Our approach is based on Locality Sensitive Hashing (LSH...
SIGIR
2011
ACM
12 years 10 months ago
2011
ACM
Pseudo-relevance feedback has proven effective for improving the average retrieval performance. Unfortunately, many experiments have shown that although pseudo-relevance feedback...