Results 131 to 140 of about 720,931 (344)

Dynamic of a nonautonomous two-species impulsive competitive system with infinite delays

open access: yesOpen Mathematics, 2019
In this paper, we consider a nonautonomous two-species impulsive competitive system with infinite delays. By the impulsive comparison theorem and some mathematical analysis, we investigate the permanence, extinction and global attractivity of the system,
He Mengxin, Li Zhong, Chen Fengde
doaj   +1 more source

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

open access: yesAdvanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal   +3 more
wiley   +1 more source

A Study Looking the Electronic Payment Market [PDF]

open access: yes
The aim of this paper is to make an analysis of the electronic payment market. We identified the most important characteristics of the electronic payment systems especially those mentioned by the European Central Bank.
Codruta POENAR
core  

Existence and attractivity results on semi-infinite intervals for integrodifferential equations with non-instantaneous impulsions in Banach spaces

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica
In this article, we study the existence of mild solutions of a non-instantaneous integrodi erential equations on unbounded domain via resolvent operators in Banach space. For our proofs, we employ the semigroups theory and Schauder’s fixed point theorem.
Bensalem Abdelhamid   +3 more
doaj   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

open access: yesAdvanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati   +11 more
wiley   +1 more source

Global Attractivity of a Rational Difference Equation [PDF]

open access: yes, 2014
: In this paper, we investigate the global attractivity of positive solutions of the nonlinear difference equation xn+1 = ax3 n+ bxnx2 n−1 + cx2 nxn−1+ dx3 n−1 Ax3 n+ Bxnx2 n−1 +Cx2 nxn−1+ Dx3, n=0,1,...
Yacine Halim, Nouressadat Touafek
core  

Continuous Stiffness Graded Metal–Ceramic Femoral Stems: UMAT‐Based Design and Finite Element Assessment

open access: yesAdvanced Engineering Materials, EarlyView.
Functionally graded metal–ceramic femoral stems are engineered through continuous UMAT‐based stiffness tailoring, eliminating discrete material interfaces while enhancing biomechanical compatibility. Low‐index power‐law gradation optimizes load transfer, reduces stress shielding, and controls implant–bone micromotion, highlighting a materials‐design ...
Rihem Nouira, Sameh Elleuch, Hanen Jrad
wiley   +1 more source

Experiments on color attractivity for the adults of Diaphorina citri Kuwayama [PDF]

open access: yes, 1990
Various colours in the visual spectrum were tested for their attractivity against the adults of Diaphorina citri Kuwayama, the Oriental Citrus psyllid.
Quilici, Serge, Trahais, B.
core  

Advances in Road Engineering: Innovation in Road Pavements and Materials

open access: yesBuildings
The road pavement sector is currently gaining more and more attractivity as a peculiar field of civil engineering [...]
Andrea Baliello, Di Wang
doaj   +1 more source

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