Results 21 to 30 of about 11,838,591 (211)

Fractional Gradient Methods via ψ-Hilfer Derivative

Fractal and Fractional, 2023
Motivated by the increase in practical applications of fractional calculus, we study the classical gradient method under the perspective of the ψ-Hilfer derivative.
Nelson Vieira, M. Manuela Rodrigues, Milton Ferreira   +2 more
doaj   +1 more source

A second-order impulsive Cauchy problem

International Journal of Mathematics and Mathematical Sciences, 2002
We study the existence of mild and classical solutions for an abstract second-order impulsive Cauchy problem modeled in the form u¨(t)=A u(t)+f(t,u(t),u˙(t)),t∈(−T0,T1),t≠ti;u(0)=x0,u˙(0)=y0; △u(ti)=Ii1 (u (ti)).
Eduardo Hernández Morales
doaj   +1 more source

A family of high-order accurate contour integral methods for strongly continuous semigroups

CoRR
Exponential integrators based on contour integral representations lead to powerful numerical solvers for a variety of ODEs, PDEs, and other time-evolution equations. They are embarrassingly parallelizable and lead to global-in-time approximations that can be efficiently evaluated anywhere within a finite time horizon.
Andrew J. Horning, Adam R. Gerlach
openaire   +3 more sources

Microgyroscope control system using a high-order band-pass continuous-time sigma-delta modulator [PDF]

, 2007
The paper presents a novel 6th order continuous-time, force-feedback band-pass sigma-delta modulator control system for the detection mode of micromachined vibratory gyroscopes.
Y. Dong, Redman-White, William, M. Kraft, Redman-White, W., Dong, Y., N. Hedenstierna, Dong, Yufeng, Kraft, Michaël, Kraft, M., W. Redman-White, Hedenstierna, N.   +10 more
core   +1 more source

Existence of mild solutions of second-order neutral functional differential inclusions with nonlocal conditions in Banach spaces

International Journal of Mathematics and Mathematical Sciences, 2004
We study the existence of mild solutions of the nonlinear second-order neutral functional differential and integrodifferential inclusions with nonlocal conditions in Banach spaces.
S. Marshal Anthoni, J.-H. Kim, J. P. Dauer   +2 more
doaj   +1 more source

Mild solutions of a class of semilinear fractional integro-differential equations subjected to noncompact nonlocal initial conditions

Cubo, 2020
In this paper, we prove the existence of mild solutions of a class of fractional semilinear integro-differential equations of order $\beta\in(1,2]$ subjected to noncompact initial nonlocal conditions.
Abdeldjalil Aouane, Smaïl Djebali, Mohamed Aziz Taoudi   +2 more
doaj   +1 more source

Dimensional Crossover in the Superfluid-Supersolid Quantum Phase Transition

Physical Review X, 2022
Supersolids are a fundamental quantum phase of matter where the global phase and translational symmetries are spontaneously broken. The recently discovered supersolidity in quantum gases of strongly magnetic atoms gives the opportunity to explore in ...
Giulio Biagioni, Nicolò Antolini, Aitor Alaña, Michele Modugno, Andrea Fioretti, Carlo Gabbanini, Luca Tanzi, Giovanni Modugno   +7 more
doaj   +1 more source

Forecasting the Dialysis Burden in Japan: Validation‐Based Projections of Prevalence and Incidence Through 2050

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Japan has one of the highest dialysis prevalence rates worldwide and a shrinking, aging population. Whether dialysis burden has entered a sustained post‐peak phase or whether recent declines partly reflect pandemic‐related disruptions remains uncertain.
Hatice Şahin, Berrak Itır Aylı, Nüket Paksoy   +2 more
wiley   +1 more source

INVERSE VARIATIONAL INEQUALITIES AND SECOND-ORDER DYNAMICAL SYSTEMS

Tạp chí Khoa học Đại học Đà Lạt
We consider the inverse variational inequality problem in finite-dimensional space and study its associated second-order dynamical system. In particular, we propose a second-order dynamical system whose trajectory converges exponentially to the solution
Quoc Thanh Trinh
doaj   +1 more source

Competition between the superconductivity and nematic order in the high-Tc superconductor

New Journal of Physics, 2013
We investigate the competition between the d-wave superconductivity and the nematic order in the high- T _c superconductor and examine the role played by the gapless fermionic degrees of freedom.
Jing Wang, Guo-Zhu Liu
doaj   +1 more source