18 search results - page 1 / 4 » OLAP Over Uncertain and Imprecise Data |
VLDB
2005
ACM
13 years 10 months ago
2005
ACM
We extend the OLAP data model to represent data ambiguity, specifically imprecision and uncertainty, and introduce an allocation-based approach to the semantics of aggregation qu...
VLDB
2007
ACM
14 years 5 months ago
2007
ACM
Several recent papers have focused on OLAP over imprecise data, where each fact can be a region, instead of a point, in a multidimensional space. They have provided a multiple-wor...
SIGMOD
2008
ACM
13 years 4 months ago
2008
ACM
OLAP is an important tool in decision support. With the help of domain knowledge, such as hierarchies of attribute values, OLAP helps the user observe the effects of various decis...
IS
2007
13 years 4 months ago
2007
Sensors are often employed to monitor continuously changing entities like locations of moving objects and temperature. The sensor readings are reported to a database system, and a...
ICDE
2009
IEEE
14 years 6 months ago
2009
IEEE
Recently, data mining over uncertain data streams has attracted a lot of attentions because of the widely existed imprecise data generated from a variety of streaming applications....