121 search results - page 21 / 25 » On Containment of Conjunctive Queries with Negation |
KRDB
2003
13 years 9 months ago
2003
We report about some preliminary issues from the DFG project “Description Logics and Spatial Reasoning” (“DLS”, DFG Grant NE 279/8-1), one of whose goals is to develop a p...
ICDE
2000
IEEE
14 years 9 months ago
2000
IEEE
Abstract Arturo Crespo, Orkut Buyukkokten, and Hector Garcia-Molina Stanford University With information dissemination (information push), data is delivered from a set of producers...
SODA
2012
ACM
11 years 10 months ago
2012
ACM
We describe a data structure for submatrix maximum queries in Monge matrices or Monge partial matrices, where a query specifies a contiguous submatrix of the given matrix, and it...
ICDT
2010
ACM
13 years 11 months ago
2010
ACM
Several computational problems in phylogenetic reconstruction can be formulated as restrictions of the following general problem: given a formula in conjunctive normal form where ...
SIGIR
2003
ACM
14 years 29 days ago
2003
ACM
One of the major problems in question answering (QA) is that the queries are either too brief or often do not contain most relevant terms in the target corpus. In order to overcom...