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JACM
1998
88views more  JACM 1998»
15 years 6 months ago
A Threshold of ln n for Approximating Set Cover
Given a collection Ᏺ of subsets of S ϭ {1, . . . , n}, set cover is the problem of selecting as few as possible subsets from Ᏺ such that their union covers S, and max k-cover ...
Uriel Feige
NAR
1998
161views more  NAR 1998»
15 years 6 months ago
Touring protein fold space with Dali/FSSP
The FSSP database and its new supplement, the Dali Domain Dictionary, present a continuously updated classification of all known 3D protein structures. The classification is deriv...
Liisa Holm, Chris Sander
TEC
2002
183views more  TEC 2002»
15 years 6 months ago
The particle swarm - explosion, stability, and convergence in a multidimensional complex space
Abstract--The particle swarm is an algorithm for finding optimal regions of complex search spaces through the interaction of individuals in a population of particles. Even though t...
Maurice Clerc, James Kennedy
TROB
2002
126views more  TROB 2002»
15 years 6 months ago
Modeling and controllability for a class of hybrid mechanical systems
Abstract-- This work studies a class of hybrid mechanical systems that locomote by switching between constraints defining different dynamic regimes. We develop a geometric framewor...
Francesco Bullo, Milos Zefran
IJCV
2010
249views more  IJCV 2010»
15 years 5 months ago
A Computational Model of Multidimensional Shape
We develop a computational model of shape that extends existing Riemannian models of shape of curves to multidimensional objects of general topological type. We construct shape sp...
Xiuwen Liu, Yonggang Shi, Ivo D. Dinov, Washington...