1497 search results - page 3 / 300 » Online Negative Databases |
JACIII
2006
13 years 6 months ago
2006
DEXA
2010
Springer
13 years 7 months ago
2010
Springer
We consider the containment problem for conjunctive queries with atomic negation. Firstly, we refine an existing algorithm based on homomorphism checks, which itself improves other...
NIPS
2003
13 years 8 months ago
2003
We interpret non-negative matrix factorization geometrically, as the problem of finding a simplicial cone which contains a cloud of data points and which is contained in the posi...
ADBIS
2009
Springer
14 years 1 months ago
2009
Springer
Abstract. We consider the problem of query containment for conjunctive queries with the safe negation property. Some necessary conditions for this problem are given. A part of the ...
ICIP
2007
IEEE
14 years 8 months ago
2007
IEEE
Nonnegative Matrix Factorization (NMF) is a powerful decomposition tool which has been used in several content representation applications recently. However, there are some diffic...