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JAPLL
2010
179views more  JAPLL 2010»
13 years 6 months ago
Tractable query answering and rewriting under description logic constraints
Answering queries over an incomplete database w.r.t. a set of constraints is an important computational task with applications in fields as diverse as information integration and ...
Héctor Pérez-Urbina, Boris Motik, Ia...
DLOG
2006
13 years 9 months ago
Data Complexity of Answering Unions of Conjunctive Queries in SHIQ
The novel context of accessing and querying large data repositories through ontologies that are formalized in terms of expressive DLs requires on the one hand to consider query an...
Magdalena Ortiz, Diego Calvanese, Thomas Eiter
CIBSE
2008
ACM
13 years 9 months ago
Using Refinement Checking as System Testing
Abstract. Software testing is an expensive and time-consuming activity; it is also error-prone due to human factors. But, it still is the most common effort used in the software in...
Cristiano Bertolini, Alexandre Mota
JMLR
2008
230views more  JMLR 2008»
13 years 7 months ago
Exponentiated Gradient Algorithms for Conditional Random Fields and Max-Margin Markov Networks
Log-linear and maximum-margin models are two commonly-used methods in supervised machine learning, and are frequently used in structured prediction problems. Efficient learning of...
Michael Collins, Amir Globerson, Terry Koo, Xavier...
ENTCS
2007
117views more  ENTCS 2007»
13 years 7 months ago
Relating Hybrid Chi to Other Formalisms
The hybrid χ (Chi) formalism is suited to modeling, simulation and verification of hybrid systems. It integrates concepts from dynamics and control theory with concepts from com...
D. A. van Beek, J. E. Rooda, Ramon R. H. Schiffele...