Results 1 to 10 of about 58,761 (268)
Journal of Low Frequency Noise, Vibration and Active Control, 2022 In this work, we investigate and apply higher-order Hamiltonian approach (HA) as one of the novelty techniques to find out the approximate analytical solution for vibrating double-sided quintic nonlinear nano-torsional actuator.
Gamal Mohamed Ismail +3 more
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Anti-BRST in the Causal Approach
Universe, 2021 It is known that the elimination of anomalies in all orders of perturbation theory is an open problem. The constraints given by usual invariance properties and the Wess–Zumino identities are not enough to eliminate the anomalies in the general case of a ...
Dan-Radu Grigore
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AIP Advances, 2014 A new and effective analytical perturbation method is presented for the multipole acoustic logging in a transversely isotropic medium (TIM), whose symmetric principal axis is parallel to the borehole axis and the exact solutions could be found.
L. Zhang +3 more
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Nonlinear Analysis, 2021 In this paper, we investigate a class of fractional hybrid differential equations with impulses, which can be seen as nonlinear differential equations with a quadratic perturbation of second type and a linear perturbation in partially ordered Banach ...
Jin You, Zhenlai Han
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Mathematics, 2020 This paper is proposed for solving a partial differential equation of second order with a fractional derivative with respect to time (the vibration string equation), where the fractional derivative order is in the range from zero to two.
Temirkhan S. Aleroev, Asmaa M. Elsayed
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Application of Perturbation Theory to a Master Equation
Advances in Mathematical Physics, 2016 We develop a matrix perturbation method for the Lindblad master equation. The first- and second-order corrections are obtained and the method is generalized for higher orders.
B. M. Villegas-Martínez +2 more
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Mathematics, 2022 The biparametric perturbation method is applied to solve the improved Föppl–von Kármán equation, in which the improvements of equations come from two different aspects: the first aspect concerns materials, and the other is from deformation.
Xiao-Ting He +3 more
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Attainability set of a mechanical controlable system and conditions of robust stability
Revista Iberoamericana de Automática e Informática Industrial RIAI, 2020 In this work, the boundary of the attainabbility set of a second order differential equation with an external perturbation is determined numerically, using the solution of the problem of the maximum variation of the oscillation amplitudes of its ...
R. Temoltzi-Ávila, R Ávila-Pozos
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A Smoothing Method for Sparse Programs by Symmetric Cone Constrained Generalized Equations
Mathematics, 2023 In this paper, we consider a sparse program with symmetric cone constrained parameterized generalized equations (SPSCC). Such a problem is a symmetric cone analogue with vector optimization, and we aim to provide a smoothing framework for dealing with ...
Cong Cheng, Lianjie Tang
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The general solution at large scale for second order perturbations in a scalar field dominated universe [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 In this paper we consider second order perturbations of a flat Friedmann-Lema tre universe whose stress-energy content is a single minimally coupled scalar field with an arbitrary potential. We derive the general solution of the perturbed Einstein equations in explicit form for this class of models when the perturbations are in the super-horizon ...
Uggla, Claes, Wainwright, John
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