نتایج جستجو برای: concave points

تعداد نتایج: 273578  

2012
Thomas L. Magnanti Dan Stratila

We introduce an algorithm design technique for a class of combinatorial optimization problems with concave costs. This technique yields a strongly polynomial primal-dual algorithm for a concave cost problem whenever such an algorithm exists for the fixedcharge counterpart of the problem. For many practical concave cost problems, the fixed-charge counterpart is a well-studied combinatorial optim...

Journal: :The Annals of Statistics 2010

Journal: :SSRN Electronic Journal 2015

Journal: :Discrete Mathematics 1991

Journal: :The Annals of Statistics 2019

Journal: :Intelligent Control and Automation 2013

Journal: :Journal of Economic Theory 1991

Ali Reza Yarahmadi Bafghi Hamid Reza Bakhshi Mehdi Mousavi

In the past, rock slope stability analysis were performed either graphically or using a hand-held calculator, but nowadays there are variety of slope stability analysis which can be used according to the field condition and potential failure mode. In 2-D analysis, effect of convex and concave walls are neglected, however concave slopes are believed to be more stable than straight walls due to t...

Journal: :Journal of controlled release : official journal of the Controlled Release Society 2006
Elena Losi Ruggero Bettini Patrizia Santi Fabio Sonvico Gaia Colombo Kristine Lofthus Paolo Colombo Nicholas A Peppas

The aim of this paper was to study the applicability of the release module assemblage technology for an adaptable control of drug delivery rate and site. The elementary release module was a swellable matrix having one base convex and the other concave, named Dome Matrix. The swelling and release behavior of the release module was studied. The presence of the convex and concave bases in the swel...

2015
Sang Yong Lee

Three methods are investigated to remove the concavity at the boundary edges and/or vertices during polyhedral mesh generation by a dual mesh method. The non-manifold elements insertion method is the first method examined. Concavity can be removed by inserting non-manifold surfaces along the concave edges and using them as an internal boundary before applying Delaunay mesh generation. Conical c...

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