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» Sums of squares based approximation algorithms for MAX-SAT
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COMPGEOM
2006
ACM
14 years 1 months ago
How to get close to the median shape
In this paper, we study the problem of L1-fitting a shape to a set of point, where the target is to minimize the sum of distances of the points to the shape, or alternatively the...
Sariel Har-Peled
MOC
2011
13 years 2 months ago
Geometric weakly admissible meshes, discrete least squares approximations and approximate Fekete points
Using the concept of Geometric Weakly Admissible Meshes (see §2 below) together with an algorithm based on the classical QR factorization of matrices, we compute efficient points...
Len Bos, Jean-Paul Calvi, Norman Levenberg, Alvise...
ICASSP
2011
IEEE
12 years 11 months ago
A reweighted least squares algorithm for detection of QAM signaling in MIMO channels
This paper proposes a reweighted least squares algorithm for quadrature amplitude modulation (QAM) detector in multiple-input multiple-output (MIMO) channels. Although the QAM det...
Katsumi Konishi, Toshihiro Furukawa
MPC
2010
Springer
147views Mathematics» more  MPC 2010»
14 years 7 days ago
Designing an Algorithmic Proof of the Two-Squares Theorem
We show a new and constructive proof of the two-squares theorem, based on a somewhat unusual, but very effective, way of rewriting the so-called extended Euclid’s algorithm. Rat...
João F. Ferreira
MICCAI
1999
Springer
13 years 11 months ago
Understanding the "Demon's Algorithm": 3D Non-rigid Registration by Gradient Descent
The “Demons Algorithm” in increasingly used for non-rigid registration of 3D medical images. However, if it is fast and usually accurate, the algorithm is based on intuitive id...
Xavier Pennec, Pascal Cachier, Nicholas Ayache