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MOR
2010
120views more  MOR 2010»
15 years 2 months ago
Proximal Alternating Minimization and Projection Methods for Nonconvex Problems: An Approach Based on the Kurdyka-Lojasiewicz In
We study the convergence properties of an alternating proximal minimization algorithm for nonconvex structured functions of the type: L(x, y) = f(x)+Q(x, y)+g(y), where f : Rn → ...
Hedy Attouch, Jérôme Bolte, Patrick R...
IVC
2007
94views more  IVC 2007»
15 years 4 months ago
Vector quantization and fuzzy ranks for image reconstruction
The problem of clustering is often addressed with techniques based on a Voronoi partition of the data space. Vector quantization is based on a similar principle, but it is a diffe...
Stefano Rovetta, Francesco Masulli
SIAMSC
2011
115views more  SIAMSC 2011»
14 years 11 months ago
A Fast and Stable Solver for Singular Integral Equations on Piecewise Smooth Curves
A scheme is presented for the numerical solution of singular integral equations on piecewise smooth curves. It relies on several techniques: reduction, Nystr¨om discretization, co...
Johan Helsing
ICCD
2005
IEEE
101views Hardware» more  ICCD 2005»
16 years 1 months ago
Restrictive Compression Techniques to Increase Level 1 Cache Capacity
Increasing cache latencies limit L1 cache sizes. In this paper we investigate restrictive compression techniques for level 1 data cache, to avoid an increase in the cache access l...
Prateek Pujara, Aneesh Aggarwal
VLDB
2004
ACM
118views Database» more  VLDB 2004»
15 years 9 months ago
On the performance of bitmap indices for high cardinality attributes
It is well established that bitmap indices are efficient for read-only attributes with low attribute cardinalities. For an attribute with a high cardinality, the size of the bitma...
Kesheng Wu, Ekow J. Otoo, Arie Shoshani