Results 41 to 50 of about 24,237 (256)
Singular Dirichlet boundary value problems II: Resonance case [PDF]
Czechoslovak Mathematical Journal, 1998 Existence results are established for the resonant problem y " + lambda(m) a y = f(t, y) a.e. on [0, 1] with y satisfying Dirichlet boundary conditions. The problem is singular since f is a Caratheodory function, a is an element of L-loc(1) (0, 1) with a > 0 a.e. on [O, I] and integral(0)(1) x(1 - x)a(x) dx < infinity.
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Nonlocal boundary value problems with resonant or non-resonant conditions [PDF]
Boundary Value Problems, 2013 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wang, Weibing, Yang, Xuxin
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International Journal of Adaptive Control and Signal Processing, EarlyView.This article proposes a convergent adaptive observer for a damped wave PDE and an infinite‐dimensional ODE coupled in cascade using sampled‐in‐space ODE state measurements. The proposed observer estimates the distributed states of the PDE and ODE along with unknown PDE parameters and spatial input.
Zehor Belkhatir +2 more
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Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
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Periodic solutions for 2kth boundary value problem with resonance
Journal of Mathematical Analysis and Applications, 2006 The authors prove existence and uniqueness of periodic solutions to the even-order differential equation in \(\mathbb{R}^N\) \[ u^{(2k)} (t)+\sum^k_{j=1}A_j u^{(2j-1)}(t)+(-1)^{k-1}\nabla G(u,t)=f(t) \] under the assumptions (1) \(A_1, A_2,\dots,A_k\) are symmetric and there exist symmetric matrices \(B_1\) and \(B_2\) and orthogonal matrices \(P_1 ...
Chen, Jinhai, Li, Weiguo
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Karl Popper and the Mechanisms of Hydrogen Embrittlement
Advanced Engineering Materials, EarlyView.Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
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Existence of Solutions for a Hadamard Fractional Boundary Value Problem at Resonance
Fractal and FractionalWe explore the existence of solutions for a Hadamard fractional differential equation, subject to nonlocal boundary conditions, which contain Hadamard fractional derivatives and Riemann–Stieltjes integrals.
Rodica Luca, Alexandru Tudorache
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Electronic Journal of Qualitative Theory of Differential Equations, 2011 In this paper, we investigate the existence of solutions for multi-point boundary value problems of impulsive fractional differential equations at resonance by using the coincidence degree theory due to Mawhin.
Chuanzhi Bai
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Liapunov-type inequalities and Neumann boundary value problems at resonance [PDF]
Mathematical Inequalities & Applications, 2005 The paper is concerned with the study of a space-dependent second-order equation with Neumann boundary conditions. First, the authors carry out a careful analysis of the associated linear problem. Using some Lyapunov type estimates, they manage to evaluate the \( \mathcal{L}^p\) norm of the smallest coefficient function for which the linear problem ...
Cañada, A. +2 more
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The PRIMA Thesaurus for Materials Science and Engineering
Advanced Engineering Materials, EarlyView.The PRIMA Thesaurus is a structured vocabulary designed to improve how materials science data is described and shared. Developed with input from multiple experts, it enables clear documentation of research workflows, data exchange, and reuse across platforms.
Rossella Aversa +8 more
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