1582 search results - page 67 / 317 » On sparse signal representations |
126
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ICANNGA
2007
Springer
15 years 6 months ago
2007
Springer
In this paper we present a new method of 3D non-negative tensor factorization (NTF) that is robust in the presence of noise and has many potential applications, including multi-way...
138
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ICASSP
2008
IEEE
15 years 6 months ago
2008
IEEE
Non-negative matrix factorisation (NMF) is an unsupervised learning technique that decomposes a non-negative data matrix into a product of two lower rank non-negative matrices. Th...
ICASSP
2010
IEEE
15 years 2 days ago
2010
IEEE
We propose a new method for imaging sound speed in breast tissue from measurements obtained by ultrasound tomography (UST) scanners. Given the measurements, our algorithm finds a...
ICASSP
2011
IEEE
14 years 3 months ago
2011
IEEE
We introduce the Line Search A-Function (LSAF) technique that generalizes the Extended-Baum Welch technique in order to provide an effective optimization technique for a broader s...
144
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STOC
2012
ACM
13 years 2 months ago
2012
ACM
We consider the problem of computing the k-sparse approximation to the discrete Fourier transform of an ndimensional signal. We show: • An O(k log n)-time randomized algorithm f...