Results 61 to 70 of about 71,240 (263)
Universal centers in the cubic trigonometric Abel equation
Electronic Journal of Qualitative Theory of Differential Equations, 2014 We study the center problem for the trigonometric Abel equation $d \rho/ d \theta= a_1 (\theta) \rho^2 + a_2(\theta) \rho^3,$ where $a_1(\theta)$ and $a_2(\theta)$ are cubic trigonometric polynomials in $\theta$.
Jaume Giné +2 more
doaj +1 more source
Cubic Systems and Abel Equations
Journal of Differential Equations, 1998 Consider autonomous differential systems of the type \[ dx/dt = \lambda x + y + P_2 (x,y)+ P_3 (x,y), \qquad dy/dt =-x+ \lambda y + Q_2 (x,y)+ Q_3 (x,y),\tag \(*\) \] where \(P_i (x,y)\) and \(Q_i (x,y)\), \(i=2,3\), are homogeneous polynomials of degree \(i\).
Devlin, J., Lloyd, N.G., Pearson, J.M.
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Advanced Engineering Materials, EarlyView.The temperature dependence of fatigue behavior in nickel‐based superalloys is investigated through high‐resolution measurements of plastic localization. While increasing temperature reduces localization and enhances fatigue performance in René 88DT, Inconel 718 exhibits a sharp degradation at intermediate temperature due to intensified slip ...
M. Calvat +5 more
wiley +1 more source
Equalities and inequalities for several variables mappings
Journal of Inequalities and Applications, 2022 In this paper, some special mappings of several variables such as the multicubic and the multimixed quadratic–cubic mappings are introduced. Then, the systems of equations defining a multicubic and a multimixed quadratic–cubic mapping are unified to a ...
Abasalt Bodaghi
doaj +1 more source
Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy
Advanced Engineering Materials, EarlyView.A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang +10 more
wiley +1 more source
Two multi-cubic functional equations and some results on the stability in modular spaces
Journal of Inequalities and Applications, 2020 In this article, we study n-variable mappings which are cubic in each variable. We also show that such mappings can be described by an equation, say, multi-cubic functional equation. Furthermore, we study the stability of such functional equations in the
Choonkil Park, Abasalt Bodaghi
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Advanced Engineering Materials, EarlyView.Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova +2 more
wiley +1 more source
A system of cubic diophantine equations
Journal of Number Theory, 1977 AbstractIn this paper we solve x3 + y + 1 − xyz = 0 completely and study a pair of simultaneous cubic diophantine equations (1) x | y3 + 1 and y | x3 + 1, where x and y are positive integers. The main result in this paper is that there exist an infinite number of sequences such that x and y satisfy (1) if and only if they are consecutive terms of one ...
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Cubic nonlinear Schrödinger equation with vorticity
New Journal of Physics, 2008 In this paper, we introduce a new class of nonlinear Schrodinger equations (NLSEs), with an electromagnetic potential(A,8), both depending on the wavefunction9. The scalar potential8 depends on |9| 2 , whereas the vector potential A satisfies the equation of magnetohydrodynamics with coefficient depending on9.
CALIARI, Marco +3 more
openaire +2 more sources
Modular Critical Element Recycling Platform Using a Nanoporous Additively Manufactured Gyroid
Advanced Engineering Materials, EarlyView.A modular recycling platform integrates 3D‐printed nanoporous gyroid structures to enable efficient critical element recovery. This system utilizes a hierarchical architecture, combining macroscopic channels with polymerization‐induced nanoscale porosity. By systematically tuning structural wall thickness and resin formulation, the platform achieves an
Xiangyu Gao +6 more
wiley +1 more source