166 search results - page 27 / 34 » A Theory of Signs for Database Semantics |
CORR
2011
Springer
13 years 2 months ago
2011
Springer
We study in this paper provenance information for queries with aggregation. Provenance information was studied in the context of various query languages that do not allow for aggr...
PODS
2011
ACM
12 years 10 months ago
2011
ACM
In the traditional data exchange setting, source instances are restricted to be complete in the sense that every fact is either true or false in these instances. Although natural ...
TCS
1998
13 years 7 months ago
1998
Algebraic translation methods are argued for in many fields of science. Several examples will be considered: from the field of compiler construction, database updates, concurren...
GIS
2008
ACM
14 years 8 months ago
2008
ACM
Geospatial information integration is not a trivial task. An integrated view must be able to describe various heterogeneous data sources and its interrelation to obtain shared con...
MM
2004
ACM
14 years 1 months ago
2004
ACM
Subspace learning techniques are widespread in pattern recognition research. They include Principal Component Analysis (PCA), Locality Preserving Projection (LPP), etc. These tech...