561 search results - page 48 / 113 » Algorithms and applications for approximate nonnegative matr... |
APPROX
2005
Springer
14 years 1 months ago
2005
Springer
Abstract. We consider the problem of fitting an n × n distance matrix M by a tree metric T. We give a factor O(min{n1/p , (k log n)1/p }) approximation algorithm for finding the...
NPL
1998
13 years 7 months ago
1998
Adaptive artificial neural network techniques are introduced and applied to the factorization of 2-D second order polynomials. The proposed neural network is trained using a const...
NIPS
2003
13 years 9 months ago
2003
In this paper, sparse representation (factorization) of a data matrix is first discussed. An overcomplete basis matrix is estimated by using the K−means method. We have proved ...
DEXA
2008
Springer
13 years 9 months ago
2008
Springer
So far, an efficient similarity search in multimedia databases has been carried out by metric access methods (MAMs), where the utilized similarity measure had to satisfy the metric...
SIAMSC
2008
13 years 7 months ago
2008
In this paper we present a new incomplete factorization of a square matrix into triangular factors in which we get standard LU or LDLT factors (direct factors) and their inverses (...