Sciweavers

154 search results - page 19 / 31
» Some Logical Properties of Nonmonotonic Causal Theories
Sort
View
PODS
2008
ACM
152views Database» more  PODS 2008»
14 years 7 months ago
Towards a theory of schema-mapping optimization
A schema mapping is a high-level specification that describes the relationship between two database schemas. As schema mappings constitute the essential building blocks of data ex...
Ronald Fagin, Phokion G. Kolaitis, Alan Nash, Luci...
DLOG
2009
13 years 5 months ago
On Correspondences between Probabilistic First-Order and Description Logics
Abstract This paper analyzes the probabilistic description logic PSHIQ by looking at it as a fragment of probabilistic first-order logic with semantics based on possible worlds. We...
Pavel Klinov, Bijan Parsia, Ulrike Sattler
EUSFLAT
2007
180views Fuzzy Logic» more  EUSFLAT 2007»
13 years 9 months ago
On Cluster Analysis Based on Fuzzy Relations Between Spatial Data
Methods like DBSCAN are widely used in the analysis of spatial data. These methods are based on the neighborhood relations which use distance between points. However, these neighb...
Efendi N. Nasibov, Gözde Ulutagay
SIGSOFT
2005
ACM
14 years 8 months ago
Fluent temporal logic for discrete-time event-based models
Fluent model checking is an automated technique for verifying that an event-based operational model satisfies some state-based declarative properties. The link between the event-b...
Emmanuel Letier, Jeff Kramer, Jeff Magee, Sebasti&...
DLOG
2008
13 years 9 months ago
A Survey of Revision Approaches in Description Logics
Abstract. Revision of a Description Logic-based ontology to incorporate newly received information consistently is an important problem for the lifecycle of ontologies. Many approa...
Guilin Qi, Fangkai Yang