Results 81 to 90 of about 317,601 (325)
Positive Radial Solutions for Semilinear Biharmonic Equations in Annular Domains
Revista Matemática Complutense, 1993 Summary: We study the existence of positive radial solutions of \(\Delta^ 2u= g(| x|) f(u)\) in an annulus with Dirichlet boundary conditions. We establish that the equation has at least one positive radially symmetric solution on any annulus if \(f\) and \(g\) are nonnegative, \(g\not\equiv 0\) and \(f\) is superlinear at zero and \(+\infty\). We also
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Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control
Advanced Engineering Materials, EarlyView.This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian +4 more
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On the positive, “radial” solutions of a semilinear elliptic equation in N$\mathbb {H}^N$
Advances in Nonlinear Analysis, 2012 We discuss various kinds of existence and non existence results for positive solutions of Emden–Fowler type equations in the hyperbolic space. The main tools are perturbation analysis, variational methods, Pohozeav type identities and reduction to ...
Bandle Catherine, Kabeya Yoshitsugu
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Hopf's lemma for viscosity solutions to a class of non-local equations with applications
, 2019 We consider a large family of non-local equations featuring Markov generators of L\'evy processes, and establish a non-local Hopf's lemma and a variety of maximum principles for viscosity solutions.
Biswas, Anup, Lőrinczi, József
core
A short course on positive solutions of systems of ODEs via fixed point index [PDF]
, 2017 We shall firstly study the existence of one positive solution of a model problem for one equation via the classical Krasnosel'ski\u\i{} fixed-point theorem.
Infante, Gennaro
core
Advanced Engineering Materials, EarlyView.Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt +8 more
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Advances in Difference Equations, 2019 Under simple conditions on f and a, we show the existence of positive radial solutions for the n-dimensional elliptic differential system {Δu(x)+Λa(|x|)f(u(x))=0,R10,x∈Rn,n≥2 $\mathbf{x}=(x_{1},x_{2},\ldots ,x_{n})^{T}, \mathbf{u}(\mathbf {x})=(u _{1 ...
Meiqiang Feng, Ping Li
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STUDY THE NONEXISTENCE OF RADIAL POSITIVE SOLUTIONS FOR A CLASS OF NONPOSITONE SEMILNEAR ELLIPTIC SYSTEMS [PDF]
, 2022 S. Hakimi
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Advanced Engineering Materials, EarlyView.This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar +6 more
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Coercive elliptic systems with gradient terms
Advances in Nonlinear Analysis, 2017 In this paper we give a classification of positive radial solutions of the following system:
Filippucci Roberta, Vinti Federico
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