Results 51 to 60 of about 404,061 (285)

Periodic boundary value problems on time scales [PDF]

Advances in Difference Equations, 2005
The paper deals with the periodic boundary value problem on time scales \[ \begin{aligned} &x^{\Delta \Delta}(t) = f(t, x(\sigma(t))), \quad t \in [a, b]_{\mathbb{T}} \\ &x(a) = x(\sigma^2(b)), \quad x^\Delta (a) = x^\Delta (\sigma(b)),\end{aligned} \] where time scale \(\mathbb{T}\) is closed subset of the interval \([a,b]\), \(\sigma(t) = \inf \{ s ...
openaire   +4 more sources

Age‐Related Characteristics of SYT1‐Associated Neurodevelopmental Disorder

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objectives We describe the clinical manifestations and developmental abilities of individuals with SYT1‐associated neurodevelopmental disorder (Baker‐Gordon syndrome) from infancy to adulthood. We further describe the neuroradiological and electrophysiological characteristics of the condition at different ages, and explore the associations ...
Sam G. Norwitz, Josefine Eck, Joel S. Winston, Kate Baker   +3 more
wiley   +1 more source

Sensitivity Analysis of Chaotic Systems using Unstable Periodic Orbits

, 2018
A well-behaved adjoint sensitivity technique for chaotic dynamical systems is presented. The method arises from the specialisation of established variational techniques to the unstable periodic orbits of the system.
Lasagna, Davide
core   +1 more source

Patterns of Postictal Abnormalities in Relation to Status Epilepticus in Adults

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Abnormalities on peri‐ictal diffusion‐weighted magnetic resonance imaging (DWI‐PMAs) are well‐established for patients with status epilepticus (SE), but knowledge on patterns of DWI‐PMAs and their prognostic impact is sparse. Methods This systematic review and individual participant data meta‐analysis included observational studies ...
Andrea Enerstad Bolle, Silvana Sarria‐Estrada, Thomas Bonduelle, Bertram Daniel Dynesen, Manuel Toledo, Zhu Chung Che, Kjell Heuser, Anastasios Chatzikonstantinou, Jérôme Aupy, Udaya Seneviratne, Estevo Santamarina Perez, Christoph Patrick Beier   +11 more
wiley   +1 more source

Matter wave pulses characteristics

, 2005
We study the properties of quantum single-particle wave pulses created by sharp-edged or apodized shutters with single or periodic openings. In particular, we examine the visibility of diffraction fringes depending on evolution time and temperature; the ...
Abramowitz A, Adolfo del Campo, Baute A D, Bernet S, Busch P, Clairon A Laurent P Nadir A Drewsen M Grison D Lounis B Salomon C, Delgado F, Faddeyeva V N, Felber J, Fowles G R, Gerasimov A S, Juan Gonzalo Muga, Lindner F, Marchewka A Schuss Z, Metcalf H J, Moretti P, Moshinsky M, Moshinsky M, Mánko V, Ramsey N F, Ranfangi A, Schneble D, Stevens K W H, Stevens K W H, Stevens K W H   +24 more
core   +1 more source

An Adaptive Human Pilot Model With Reaction Time Delay for Enhanced Adaptive Control in Piloted Systems

International Journal of Adaptive Control and Signal Processing, EarlyView.
This work introduces an adaptive human pilot model that captures pilot time‐delay effects in adaptive control systems. The model enables the prediction of pilot–controller interactions, facilitating safer integration and improved design of adaptive controllers for piloted applications.
Abdullah Habboush, Yildiray Yildiz
wiley   +1 more source

The Periodic Boundary Value Problem for the Weakly Dissipative μ-Hunter-Saxton Equation

Advances in Mathematical Physics, 2015
We study the periodic boundary value problem for the weakly dissipative μ-Hunter-Saxton equation. We establish the local well-posedness in Besov space B2,13/2, which extends the previous regularity range to the critical case.
Zhengyong Ouyang, Xiangdong Wang, Haiwu Rong   +2 more
doaj   +1 more source

A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller

International Journal of Adaptive Control and Signal Processing, EarlyView.
Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg, Paulo Jefferson Dias de Oliveira Evald, Shivam Chaturvedi, Hilton Abilio Gründling, Rodrigo Varella Tambara, Wencong Su   +5 more
wiley   +1 more source

Existence of Positive Solutions for a Fourth-Order Periodic Boundary Value Problem

Abstract and Applied Analysis, 2011
The existence results of positive solutions are obtained for the fourth-order periodic boundary value problem u(4)−βu′′+αu=f(t,u,u′′), 0≤t≤1, u(i)(0)=u(i)(1),  i=0,1,2,3, where f:[0,1]×R+×R→R+ is continuous, α,β∈R, and satisfy 00.
Yongxiang Li
doaj   +1 more source

Three positive solutions for second-order periodic boundary value problems with sign-changing weight

Boundary Value Problems, 2018
In this paper, we study the global structure of positive solutions of periodic boundary value problems {−u″(t)+q(t)u(t)=λh(t)f(u(t)),t∈(0,2π),u(0)=u(2π),u′(0)=u′(2π), $$\textstyle\begin{cases} -u''(t)+q(t)u(t)=\lambda h(t)f(u(t)), \quad t\in (0,2\pi ), \\
Zhiqian He, Ruyun Ma, Man Xu
doaj   +1 more source