Results 31 to 40 of about 178,657 (259)

Boundary Sentinels with Given Sensitivity [PDF]

open access: yes, 2009
The notion of sentinels with given sensitivity was introduced by J.-L. Lions in [10] in order to identify parameters in a problem of pollution ruled by a semilinear parabolic equation.
Massengo Mophou, Gisèle   +1 more
core   +2 more sources

Exact controllability of linear neutral type systems by the moment problem approach [PDF]

open access: yes, 2008
International audienceThe problem of exact null-controllability is considered for a wide class of linear neutral type systems with distributed delay. The main tool of the analysis is the application of the moment problem approach and the theory of the ...
Rabah, Rabah, Sklyar, Grigory,
core   +3 more sources

Fast global null controllability for a viscous Burgers' equation despite the presence of a boundary layer [PDF]

open access: yes, 2013
In this work, we are interested in the small time global null controllability for the viscous Burgers' equation y_t - y_xx + y y_x = u(t) on the line segment [0,1]. The second-hand side is a scalar control playing a role similar to that of a pressure. We
Marbach, Frédéric
core   +3 more sources

Boundary controllability of nonlocal Hilfer fractional stochastic differential systems with fractional Brownian motion and Poisson jumps

open access: yesAdvances in Difference Equations, 2019
By using stochastic analysis, fractional analysis, compact semigroups and the Schauder fixed-point theorem, we discuss the approximate boundary controllability of a nonlocal Hilfer fractional stochastic differential system with fractional Brownian motion
Hamdy M. Ahmed   +2 more
doaj   +1 more source

Numerical null controllability of a semi-linear heat equation via a least squares method [PDF]

open access: yes, 2011
This note deals with the computation of distributed null controls for a semi-linear 1D heat equation, in the sublinear and slightly superlinear cases.
Fernández Cara, Enrique, Münch, Arnaud
core   +3 more sources

An approach to exact nonlinear feedback control design employing recursive approximations and the null space [PDF]

open access: yesInternational Journal of Dynamics and Control, 2021
AbstractA strategy to design exact nonlinear feedback controllers based on a recursive application of approximate linearization methods is examined. The computations are algebraic and computationally simpler than solving the set of coupled nonlinear partial differential equations thereby facilitating practical symbolic computer computations enabling ...
Parisa Khosravi, Robert H. Bishop
openaire   +1 more source

Optimal estimates of norms of fast controls in exact null controllability of two non-classical abstract parabolic systems

open access: yesAdvances in Differential Equations, 2003
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
R. Triggiani
semanticscholar   +4 more sources

Quantitative Fattorini-Hautus test and minimal null control time for parabolic problems [PDF]

open access: yes, 2018
This paper investigates the link between the null controllability property for some abstract parabolic problems and an inequality that can be seen as a quantified Fattorini-Hautus test.
Ammar-Khodja, Farid   +3 more
core   +3 more sources

Local exact controllability of the diffusion equation in one dimension

open access: yesAbstract and Applied Analysis, 2003
This paper establishes the local exact null controllability of the diffusion equation in one dimension using distributed controls in the case of the Dirichlet boundary value problem.
Marius Beceanu
doaj   +1 more source

Null controllability of a nonlinear heat equation

open access: yesAbstract and Applied Analysis, 2002
We study the internal exact null controllability of a nonlinear heat equation with homogeneous Dirichlet boundary condition. The method used combines the Kakutani fixed-point theorem and the Carleman estimates for the backward adjoint linearized system ...
G. Aniculăesei, S. Aniţa
doaj   +1 more source

Home - About - Disclaimer - Privacy