Results 31 to 40 of about 9,050,649 (204)

Mittag-Leffler string stability of singularly perturbed stochastic systems within local fractal space

open access: yesMathematical Modelling and Analysis, 2019
In this paper, we define a new type of string stability based on Mittag-Leffler function so-called Mittag-Leffler (p\alpha)-string stability. This kind of stability for a class of singularly perturbed stochastic systems of fractional order will be ...
Khosro Sayevand
doaj   +1 more source

Second Order Eigensensitivities of Singularly Perturbed Systems

open access: yesJournal of King Saud University: Engineering Sciences, 1994
In this paper, second order eigenvalue sensitivities are derived with respect to the singular perturbation parameter whose variation changes the reduced system order.
Zaglol S. Elrazaz, Awadh A. Al-Digs
doaj   +1 more source

Stability bound analysis of singularly perturbed systems with time-delay [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2013
This paper considers the stability bound problem of singularly perturbed systems with time-delay. Some stability criteria are derived by constructing appropriate Lyapunov-Krasovskii functionals.
Sun Fengqi   +3 more
doaj   +1 more source

Robust Control of Wind Turbines by Using Singular Perturbation Method and Linear Parameter Varying Model

open access: yesJournal of Control Science and Engineering, 2016
The maximum power point tracking problem of variable-speed wind turbine systems is studied in this paper. The wind conversion systems contain both mechanical part and electromagnetic part, which means the systems have time scale property.
Yan Zhang   +3 more
doaj   +1 more source

On Step-Like Contrast Structure of Singularly Perturbed Systems

open access: yesBoundary Value Problems, 2009
The existence of a step-like contrast structure for a class of high-dimensional singularly perturbed system is shown by a smooth connection method based on the existence of a first integral for an associated system.
Ni Mingkang, Wang Zhiming
doaj   +2 more sources

Semiclassical states for non-cooperative singularly perturbed fractional Schrödinger systems

open access: yesBoundary Value Problems, 2022
We study the following non-cooperative type singularly perturbed systems involving the fractional Laplacian operator: { ε 2 s ( − Δ ) s u + a ( x ) u = g ( v ) , in  R N , ε 2 s ( − Δ ) s v + a ( x ) v = f ( u ) , in  R N , $$ \textstyle\begin{cases ...
Suhong Li   +3 more
doaj   +1 more source

Higher-Order Energy Expansions and Spike Locations [PDF]

open access: yes, 2004
We consider the following singularly perturbed semilinear elliptic problem: (I)\left\{ \begin{array}{l} \epsilon^{2} \Delta u - u + f(u)=0 \ \ \mbox{in} \ \Omega, \\ u>0 \ \ \mbox{in} \ \ \Omega \ \ \mbox{and} \ \frac{\partial u}{\partial \nu}
Winter, M, Wei, J
core   +1 more source

A Marchuk’s Model Analysis by Proposed Decomposition Theorem

open access: yesComputation
Taking the Singularly Perturbed System (SPS) as a model of ODE system separation into fast and slow subsystems by an arbitrarily small parameter, we state and prove a theorem on the decomposition of an Ordinary Differential Equations (ODE) system without
Marina Bershadsky   +2 more
doaj   +1 more source

Conditions of Functional Null Controllability for Some Types of Singularly Perturbed Nonlinear Systems with Delays

open access: yesAxioms, 2019
Two types of singularly-perturbed nonlinear time delay controlled systems are considered. For these systems, sufficient conditions of the functional null controllability are derived.
Valery Y. Glizer
doaj   +1 more source

Mixed TiO2–SiO2 thin coatings for selective adsorption and sunlight‐powered photodegradation of cationic pollutants

open access: yesResponsive Materials, EarlyView.
Environmental pollution and water scarcity demand innovative purification methods. This study presents a sol‐gel approach to fabricate mixed silica–titania thin films joining photocatalytic activity with selective sorption capability. The films exhibit higher surface area, enhanced degradation of cationic and improved performance over bare titania ...
Andrea Lanfranchi   +13 more
wiley   +1 more source

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