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GLOBECOM
2006
IEEE

132views Communications» more GLOBECOM 2006»

Optimal Resource Allocation via Geometric Programming for OFDM Broadcast and Multiple Access Channels

14 years 1 months ago

Abstract— For multi-user orthogonal frequency division multiplexing (OFDM) systems, efﬁcient optimal rate and power allocation algorithms are presented via geometric programmin...

Kibeom Seong, David D. Yu, Youngjae Kim, John M. C...

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26

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JGO
2008

111views more JGO 2008»

A geometric framework for nonconvex optimization duality using augmented lagrangian functions

13 years 7 months ago

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We provide a unifying geometric framework for the analysis of general classes of duality schemes and penalty methods for nonconvex constrained optimization problems. We present a ...

Angelia Nedic, Asuman E. Ozdaglar

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30

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NI
2011

168views more NI 2011»

Automated Reconstruction of Dendritic and Axonal Trees by Global Optimization with Geometric Priors

12 years 10 months ago

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We present a novel probabilistic approach to fully automated delineation of tree structures in noisy 2D images and 3D image stacks. Unlike earlier methods that rely mostly on local...

Engin Türetken, Germán González...

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24

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FOCS
2007
IEEE

109views Theoretical Computer Science» more FOCS 2007»

On the Optimality of Planar and Geometric Approximation Schemes

14 years 1 months ago

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We show for several planar and geometric problems that the best known approximation schemes are essentially optimal with respect to the dependence on ǫ. For example, we show that...

Dániel Marx

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21

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EOR
2011

119views more EOR 2011»

Geometric representation of the mean-variance-skewness portfolio frontier based upon the shortage function

12 years 11 months ago