Results 21 to 30 of about 1,310,010 (183)
Development of a Multiperimeter Sensing System Based on POTDR
IEEE Photonics Journal, 2018 Polarization optical time-domain reflectometry (POTDR) is sensitive to perturbations on any point of the fiber under test (FUT). However, restricted by the sensing principle, the signal of the front perturbation would mask the signals of the rear ones ...
Feng Wang +6 more
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A remark on the linearization technique in half-linear oscillation theory [PDF]
Opuscula Mathematica, 2006 We show that oscillatory properties of the half-linear second order differential equation \[(r(t)\Phi(x'))'+c(t)\Phi(x)=0,\qquad\Phi(x)=|x|^{p-2}x,\quad p\gt 1,\] can be investigated via oscillatory properties of a certain associated second order linear ...
Ondřej Došlý
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A remark on the similarity and perturbation problems [PDF]
, 2013 In this note we show that Kadison's similarity problem for C*-algebras is equivalent to a problem in perturbation theory: must close C*-algebras have close ...
Smith, R.R. +15 more
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Regularized variational principles for the perturbed Kepler problem [PDF]
Advances in Mathematics, 2021 The goal of the paper is to develop a method that will combine the use of variational techniques with regularization methods in order to study existence and multiplicity results for the periodic and the Dirichlet problem associated to the perturbed Kepler system \[ \ddot x = -\frac{x}{|x|^3} + p(t), \quad x \in \mathbb{R}^d, \] where $d\geq 1$, and $p:\
Vivina Laura Barutello +2 more
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Abstract and Applied Analysis, 2012 We study the optimal control problem of a controlled time-symmetric forward-backward doubly stochastic differential equation with initial-terminal state constraints. Applying the terminal perturbation method and Ekeland’s variation principle, a necessary
Shaolin Ji, Qingmeng Wei, Xiumin Zhang
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A continuation principle for a class of periodically perturbed autonomoussystems
Mathematische Nachrichten, 2007 AbstractThe paper deals with a T ‐periodically perturbed autonomous system in ℝn of the form with ε > 0 small. The main goal of the paper is to provide conditions ensuring the existence of T ‐periodic solutions to (PS) belonging to a given open set W ⊂ C ([0, T ],ℝn ).
Kamenskii M., Makarenkov O., Nistri P.
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Sensitivity of the Solution to Nonsymmetric Differential Matrix Riccati Equation
Mathematics, 2021 Nonsymmetric differential matrix Riccati equations arise in many problems related to science and engineering. This work is focusing on the sensitivity of the solution to perturbations in the matrix coefficients and the initial condition.
Vera Angelova +2 more
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Abstract and Applied Analysis, 2014 We focus on the fully coupled forward-backward stochastic differential equations with jumps and investigate the associated stochastic optimal control problem (with the nonconvex control and the convex state constraint) along with stochastic maximum ...
Qingmeng Wei
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A localization principle for multiplicative perturbations
Journal of Functional Analysis, 1986 A certain resolvent estimate implies point spectrum for discrete linear wave equations with random local propagation speed. The significance of point spectrum in this context is that scattering within a random medium produces only localized standing waves.
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Demonstratio Mathematica, 2020 The existence of a.e. monotonic solutions for functional quadratic Hammerstein integral equations with the perturbation term is discussed in Orlicz spaces.
Metwali Mohamed M. A.
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