Results 21 to 30 of about 14,097 (243)

Optimizing the Strategic Decisions for One-Way Station-Based Carsharing Systems: A Mean-CVaR Approach

open access: yesIEEE Access, 2021
The study focuses on the strategic decisions including on the location and capacity of stations and the fleet size for designing the one-way station-based carsharing systems. Under demand uncertainty, we introduce a two-stage risk-averse stochastic model
Kai Zhang   +3 more
doaj   +1 more source

A Branch-and-Cut Algorithm for the Multilevel Generalized Assignment Problem

open access: yesIEEE Access, 2013
The multilevel generalized assignment problem (MGAP) consists of minimizing the assignment cost of a set of jobs to machines, each having associated therewith a capacity constraint.
Pasquale Avella   +2 more
doaj   +1 more source

Cutting the Coon amplitude

open access: yesJournal of High Energy Physics, 2023
The Coon amplitude is a q-deformed generalization of the Veneziano amplitude exhibiting a semi-infinite sequence of poles that converge on an accumulation point, from which a branch cut emerges. A number of recent papers have provided compelling evidence
Christian Baadsgaard Jepsen
doaj   +1 more source

A branch‐and‐cut algorithm for the Team Orienteering Problem [PDF]

open access: yesInternational Transactions in Operational Research, 2017
AbstractThe Team Orienteering Problem aims at maximizing the total amount of profit collected by a fleet of vehicles while not exceeding a predefined travel time limit on each vehicle. In the last years, several exact methods based on different mathematical formulations were proposed.
Bianchessi, Nicola   +2 more
openaire   +4 more sources

Ultrasound intima media thickness cut-off values for cranial and extracranial arteries in patients with suspected giant cell arteritis

open access: yesFrontiers in Medicine, 2022
ObjectiveTo determine the optimal ultrasound (US) cut-off values for cranial and extracranial arteries intima media thickness (IMT) to discriminate between patients with and without giant cell arteritis (GCA).MethodsRetrospective observational study ...
Katerine López-Gloria   +19 more
doaj   +1 more source

A Branch-and-Cut-and-Price Algorithm for the Electric Vehicle Routing Problem with Multiple Technologies [PDF]

open access: yes, 2021
Este artículo es parte de Topical Collection on Decomposition at 70We provide an exact optimization algorithm for the electric vehicle routing problem with multiple recharge technologies.
Righini, Giovanni   +4 more
core   +1 more source

A Branch-and-Cut Algorithm for Submodular Interdiction Games

open access: yesINFORMS Journal on Computing, 2022
Many relevant applications from diverse areas such as marketing, wildlife conservation, and defending critical infrastructure can be modeled as interdiction games. In this work, we introduce interdiction games whose objective is a monotone and submodular set function.
Kübra Taninmis, Markus Sinnl
openaire   +2 more sources

Beech shearing/high-stumping to control understory interference

open access: yesThe Forestry Chronicle, 2017
The research evaluated opportunities for cutting off small understory beech root suckers at 0.6-0.9 m above ground. By six years (pilot test) after cutting with lopping shears in a closed-canopy uneven-aged northern hardwood stand, 91% of high stumps ...
Ralph D. Nyland, Diane H. Kiernan
doaj   +1 more source

Branch-and-Cut-and-Price algorithms for the preemptive RCPSP [PDF]

open access: yesRAIRO - Operations Research, 2018
In this article, we address the preemptive Resource-Constrained Precedence Scheduling Problem. We propose two mixed integer formulations containing an exponential number of variables and inequalities. An antichain is a set of pairwise incomparable elements with respect to the precedence constraints.
Fouilhoux, Pierre   +3 more
openaire   +3 more sources

An exact algorithm for design of content delivery networks in MPLS environment

open access: yesJournal of Telecommunications and Information Technology, 2004
Content delivery network (CDN) is an efficient and inexpensive method to improve Internet service quality. In this paper we formulate an optimisation problem of replica location in a CDN using MPLS techniques.
Krzysztof Walkowiak
doaj   +1 more source

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