211 search results - page 4 / 43 » Ranked Query Processing in Uncertain Databases |
ICDE
2007
IEEE
14 years 7 months ago
2007
IEEE
Top-k processing in uncertain databases is semantically and computationally different from traditional top-k processing. The interplay between score and uncertainty makes traditio...
ICDE
2008
IEEE
14 years 7 months ago
2008
IEEE
This work introduces novel polynomial algorithms for processing top-k queries in uncertain databases under the generally adopted model of x-relations. An x-relation consists of a n...
ICDE
2009
IEEE
14 years 7 months ago
2009
IEEE
Mediator-based data integration systems resolve exploratory queries by joining data elements across sources. In the presence of uncertainties, such multiple expansions can quickly ...
ICDE
2008
IEEE
14 years 7 months ago
2008
IEEE
This paper introduces U-relations, a succinct and purely relational representation system for uncertain databases. U-relations support attribute-level uncertainty using vertical pa...
SIGMOD
2011
ACM
12 years 8 months ago
2011
ACM
Ranking queries report the top-K results according to a user-defined scoring function. A widely used scoring function is the weighted summation of multiple scores. Often times, u...