Results 11 to 20 of about 66,753 (329)
Numerical and asymptotic flow stability analysis of vortex structures [PDF]
E3S Web of Conferences, 2021 Stability problem of an axisymmetric swirling flow of a viscous incompressible fluid with respect to nonaxisymmetric perturbations is considered. The system of ordinary differential equations for the amplitude functions is solved numerically by the Runge-
Akhmetov Vadim
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On a singular perturbation problem for linear systems of ordinary differential equations. II. [PDF]
Kodai Mathematical Journal, 1979 Yoshikazu Hirasawa
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Asymptotic forms of solutions of perturbed half-linear ordinary differential equations [PDF]
Archivum Mathematicum, 2021 Consider the following two differential equations on \([0,\infty)\): \((E_+)\) \(\quad (|u^{\prime}|^{\alpha -1}u^{\prime})^{\prime}=\alpha (1+p(t))|u|^{\alpha -1}u,\) \((E_-)\) \(\quad (|u^{\prime}|^{\alpha -1}u^{\prime})^{\prime}=\alpha (1-p(t))|u|^{\alpha -1}u,\) where \(\alpha\) is a positive constant; \(p\in C[0,\infty)\) with \(p(t)\ge 0\) for \((
Luey, Sokea, Usami, Hiroyuki
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Asymptotic behaviour of solutions of quasilinear differential-algebraic equations
Electronic Journal of Qualitative Theory of Differential Equations, 2022 This paper is concerned with the asymptotic behavior of solutions of linear differential-algebraic equations (DAEs) under small nonlinear perturbations.
Vu Hoang Linh, Ngo Nga, Nguyen Tuan
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1 + 3 covariant perturbations in power-law f(R) gravity
European Physical Journal C: Particles and Fields, 2021 We applied the 1+3 covariant approach around the Friedmann–Lemaître–Robertson–Walker (FLRW) background, together with the equivalence between f(R) gravity and scalar-tensor theory to study cosmological perturbations.
Beatrice Murorunkwere +2 more
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Passive identification of multivariable stabilization system elements’ dynamics
Автоматизация технологических и бизнес-процессов, 2020 Increasing domestic automatic control systems competitiveness requires the design work intensification based on the implementation of modern information technologies.
S. I. Osadchy, V. A. Zozulia
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Transversal homoclinics in nonlinear systems of ordinary differential equations
Electronic Journal of Qualitative Theory of Differential Equations, 2000 Bifurcation of transversal homoclinics is studied for a pair of ordinary differential equations with periodic perturbations when the first unperturbed equation has a manifold of homoclinic solutions and the second unperturbed equation is vanishing.
Michal Fečkan
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Universe, 2022 We investigate electromagnetic, gravitational, and plasma-related perturbations to the first order on homogeneous and hypersurface orthogonal locally rotationally symmetric (LRS) class II spacetimes.
Philip Semrén
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A two-step perturbation technique for nonuniform single and differential lines [PDF]
, 2013 A novel two-step perturbation technique to analyze nonuniform single and differential transmission lines in the frequency domain is presented. Here, nonuniformities are considered as perturbations with respect to a nominal uniform line, allowing an ...
Chernobryvko, Mykola +2 more
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Sparse inference and active learning of stochastic differential equations from data
Scientific Reports, 2022 Automatic machine learning of empirical models from experimental data has recently become possible as a result of increased availability of computational power and dedicated algorithms. Despite the successes of non-parametric inference and neural-network-
Yunfei Huang +3 more
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