Results 1 to 10 of about 321 (78)

Strength-plasticity synergy from ambient to high temperature via gradient-ordering in boride-reinforced WTaV medium-entropy alloy [PDF]

open access: yesNature Communications
Developing next-generation hypersonic vehicles necessitates structural materials capable of withstanding extreme thermal gradients. However, conventional alloys usually sacrifice room-temperature plasticity for breakthroughs in high-temperature strength.
Bo Sun   +8 more
doaj   +2 more sources

Networks of causal relationships in the U.S. stock market

open access: yesDependence Modeling, 2022
We consider a network-based framework for studying causal relationships in financial markets and demonstrate this approach by applying it to the entire U.S. stock market.
Shirokikh Oleg   +6 more
doaj   +1 more source

Some Results on Path-Factor Critical Avoidable Graphs

open access: yesDiscussiones Mathematicae Graph Theory, 2023
A path factor is a spanning subgraph F of G such that every component of F is a path with at least two vertices. We write P≥k = {Pi : i ≥ k}. Then a P≥k-factor of G means a path factor in which every component admits at least k vertices, where k ≥ 2 is ...
Zhou Sizhong
doaj   +1 more source

Decomposing tournaments into paths

open access: yesProceedings of the London Mathematical Society, Volume 121, Issue 2, Page 426-461, August 2020., 2020
Abstract We consider a generalisation of Kelly's conjecture which is due to Alspach, Mason, and Pullman from 1976. Kelly's conjecture states that every regular tournament has an edge decomposition into Hamilton cycles, and this was proved by Kühn and Osthus for large tournaments. The conjecture of Alspach, Mason, and Pullman asks for the minimum number
Allan Lo   +3 more
wiley   +1 more source

Determination of the magnetostrictive atomic enviroments in FeCoB alloys [PDF]

open access: yes, 2012
The atomic environments of Fe and Co involved in the magnetostriction effect in FeCoB alloys have been identified by differential extended x-ray fine structure (DiffEXAFS) spectroscopy.
Aroca Hernández-Ros, Claudio   +6 more
core   +3 more sources

Mathematical evolution in discrete networks [PDF]

open access: yes, 2013
This paper provides a mathematical explanation for the phenomenon of \triadic closure" so often seen in social networks. It appears to be a natural consequence when network change is constrained to be continuous.
Pfaltz, John F.
core   +2 more sources

The impact of filtering in a branch-and-cut algorithm for multicommodity capacitated fixed charge network design

open access: yesEURO Journal on Computational Optimization, 2018
In this paper, we present a state-of-the-art branch-and-cut (B&C) algorithm for the multicommodity capacitated fixed charge network design problem (MCND).
Mervat Chouman   +2 more
doaj   +1 more source

Evacuation modeling: a case study on linear and nonlinear network flow models

open access: yesEURO Journal on Computational Optimization, 2016
We present a nonlinear traffic flow network model that is coupled to gaseous hazard information for evacuation planning. This model is evaluated numerically against a linear network flow model for different objective functions that are relevant for ...
Simone Göttlich   +3 more
doaj   +1 more source

A hybrid approach to the solution of a pricing model with continuous demand segmentation

open access: yesEURO Journal on Computational Optimization, 2013
Price optimization fits naturally the framework of bilevel programming, where a leader integrates within its decision process the reaction of rational customers.
Patrice Marcotte   +2 more
doaj   +1 more source

Sink location to find optimal shelters in evacuation planning

open access: yesEURO Journal on Computational Optimization, 2016
The sink location problem is a combination of network flow and location problems: from a given set of nodes in a flow network a minimum cost subset W has to be selected such that given supplies can be transported to the nodes in W.
P. Heßler, H.W. Hamacher
doaj   +1 more source

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