Results 21 to 30 of about 563,494 (247)

Clustering Improves the Goemans–Williamson Approximation for the Max-Cut Problem

open access: yesComputation, 2020
MAX-CUT is one of the well-studied NP-hard combinatorial optimization problems. It can be formulated as an Integer Quadratic Programming problem and admits a simple relaxation obtained by replacing the integer “spin” variables xi by unitary vectors v→i ...
Angel E. Rodriguez-Fernandez   +3 more
doaj   +1 more source

Home away table classification and carry-over effect values minimization under restricted breaks for round-robin tournament

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2022
Sports scheduling is the research region that concerns making a reasonable game schedule, especially a round-robin tournament, for sports competitions. One of the important factors in game scheduling is fairness.
Fei XUE, Haijunfu MA, Maiko SHIGENO
doaj   +1 more source

Existence of Multispike Positive Solutions for a Nonlocal Problem in ℝ3

open access: yesAdvances in Mathematical Physics, 2020
In this paper, we study the following nonlinear Choquard equation −ϵ2Δu+Kxu=1/8πϵ2∫ℝ3u2y/x−ydyu,x∈ℝ3, where ϵ>0 and Kx is a positive bounded continuous potential on ℝ3.
Jing Yang, Qiuxiang Bian, Na Zhao
doaj   +1 more source

Linear-Time FPT Algorithms via Network Flow [PDF]

open access: yes, 2013
In the area of parameterized complexity, to cope with NP-Hard problems, we introduce a parameter k besides the input size n, and we aim to design algorithms (called FPT algorithms) that run in O(f(k)n^d) time for some function f(k) and constant d. Though
Iwata, Yoichi   +2 more
core   +1 more source

Off-axis vortex beam propagation through classical optical system in terms of Kummer confluent hypergeometric function

open access: yes, 2020
The analytical solution for the propagation of the laser beam with optical vortex through the system of lenses is presented. The optical vortex is introduced into the laser beam (described as Gaussian beam) by spiral phase plate.
Augustyniak, Ireneusz   +4 more
core   +1 more source

On Pairwise Costs for Network Flow Multi-Object Tracking [PDF]

open access: yes, 2015
Multi-object tracking has been recently approached with the min-cost network flow optimization techniques. Such methods simultaneously resolve multiple object tracks in a video and enable modeling of dependencies among tracks.
Chari, Visesh   +3 more
core   +1 more source

Identity-based incremental signature scheme from lattices

open access: yesTongxin xuebao, 2021
By taking ideas of identity-based cryptography into incremental signatures, the concept of identity-based incremental signature was proposed, and then a specific scheme from lattices was also constructed.The scheme was shown to be provably secure against
Miaomiao TIAN, Jing CHEN, Hong ZHONG
doaj   +2 more sources

Mathematical models and a constructive heuristic for finding minimum fundamental cycle bases [PDF]

open access: yesYugoslav Journal of Operations Research, 2005
The problem of finding a fundamental cycle basis with minimum total cost in a graph arises in many application fields. In this paper we present some integer linear programming formulations and we compare their performances, in terms of instance size, CPU
Liberti Leo   +3 more
doaj   +1 more source

Small Black Holes on Branes: Is the horizon regular or singular ?

open access: yes, 2004
We investigate the following question: Consider a small mass, with $\epsilon$ (the ratio of the Schwarzschild radius and the bulk curvature length) much smaller than 1, that is confined to the TeV brane in the Randall-Sundrum I scenario.
C. Sahabandu   +10 more
core   +1 more source

Modeling and optimization of production and distribution of drinking water at VMW [PDF]

open access: yes, 2011
We develop and discuss an operational planning model aiming at minimizing production and distribution costs in large drinking water networks containing buffers with free inflow.
B. Ulanicki   +5 more
core   +1 more source

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