Results 11 to 20 of about 340,916 (149)

Positive almost periodic solutions of nonautonomous evolution equations and application to Lotka–Volterra systems

open access: yesMathematical Methods in the Applied Sciences, Volume 46, Issue 11, Page 11780-11801, 30 July 2023., 2023
The aim of this paper is to establish some sufficient conditions ensuring the existence and uniqueness of positive (Bohr) almost periodic solutions to a class of semilinear evolution equations of the form: u′(t)=A(t)u(t)+f(t,u(t)),t∈ℝ$$ {u}^{\prime }(t)=A(t)u(t)+f\left(t,u(t)\right),t\in \mathbb{R} $$.
Kamal Khalil
wiley   +1 more source

Optimal control of the sweeping process over polyhedral controlled sets [PDF]

open access: yes, 2015
The paper addresses a new class of optimal control problems governed by the dissipative and discontinuous differential inclusion of the sweeping/Moreau process while using controls to determine the best shape of moving convex polyhedra in order to ...
Colombo, Giovanni   +3 more
core   +3 more sources

The classical limit of non-integrable quantum systems [PDF]

open access: yes, 2005
The classical limit of non-integrable quantum systems is studied. We define non-integrable quantum systems as those which have, as their classical limit, a non-integrable classical system.
Castagnino, Mario, Lombardi, Olimpia
core   +1 more source

Lipschitzian Regularity of the Minimizing Trajectories for Nonlinear Optimal Control Problems

open access: yes, 2002
We consider the Lagrange problem of optimal control with unrestricted controls and address the question: under what conditions we can assure optimal controls are bounded?
Torres, Delfim F. M.
core   +2 more sources

Sliding mode adaptive state observation for time-delay uncertain nonlinear systems [PDF]

open access: yes, 2008
In this paper a method to design robust adaptive sliding mode observers (ASMO) for a class of nonlinear time- delay systems with uncertainties, is proposed. The objective is to achieve insensitivity and robustness of the proposed sliding mode observer to
Raoufi, R., Zinober, A.S.I.
core   +1 more source

Homogenization of locally stationary diffusions with possibly degenerate diffusion matrix [PDF]

open access: yes, 2009
This paper deals with homogenization of second order divergence form parabolic operators with locally stationary coefficients. Roughly speaking, locally stationary coefficients have two evolution scales: both an almost constant microscopic one and a ...
Rhodes, Rémi
core   +2 more sources

Convergence rate and concentration inequalities for Gibbs sampling in high dimension

open access: yes, 2014
The objective of this paper is to study the Gibbs sampling for computing the mean of observable in very high dimension - a powerful Markov chain Monte Carlo method. Under the Dobrushin's uniqueness condition, we establish some explicit and sharp estimate
Wang, Neng-Yi, Wu, Liming
core   +1 more source

Caratheodory-Equivalence, Noether Theorems, and Tonelli Full-Regularity in the Calculus of Variations and Optimal Control

open access: yes, 2002
We study, in a unified way, the following questions related to the properties of Pontryagin extremals for optimal control problems with unrestricted controls: i) How the transformations, which define the equivalence of two problems, transform the ...
Torres, Delfim F. M.
core   +3 more sources

Subgradient formulas for optimal control problems with constant dynamics

open access: yes, 2012
In this thesis our first concern is the study of the minimal time function corresponding to control problems with constant convex dynamics and closed target sets.
Lingyan Huang
semanticscholar   +1 more source

Nonlocal Cooperative Behavior, Psychological Effects, and Collective Decision‐Making: An Exemplification With Predator–Prey Models

open access: yesMathematical Methods in the Applied Sciences, Volume 48, Issue 12, Page 12011-12037, August 2025.
ABSTRACT In bio‐social models, cooperative behavior has evolved as an adaptive strategy, playing multi‐functional roles. One of such roles in populations is to increase the success of the survival and reproduction of individuals and their families or social groups.
Sangeeta Saha   +2 more
wiley   +1 more source

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