Results 1 to 10 of about 795,154 (263)

Memory Effects, Multiple Time Scales and Local Stability in Langevin Models of the S&P500 Market Correlation [PDF]

open access: yesEntropy, 2023
The analysis of market correlations is crucial for optimal portfolio selection of correlated assets, but their memory effects have often been neglected.
Tobias Wand   +2 more
doaj   +2 more sources

Physical Origins of Memory Effects in a Non-Markovian Quantum Evolution [PDF]

open access: yesEntropy
We quantitatively investigate the physical origins of the non-Markovianity measure proposed in our previous work, which can be directly interpreted as memory effects, i.e., the dependence of a quantum system’s future evolution on its history.
Shao-Cheng Hou   +3 more
doaj   +2 more sources

Memory Effects in Quantum Dynamics Modelled by Quantum Renewal Processes [PDF]

open access: yesEntropy, 2021
Simple, controllable models play an important role in learning how to manipulate and control quantum resources. We focus here on quantum non-Markovianity and model the evolution of open quantum systems by quantum renewal processes.
Nina Megier   +3 more
doaj   +2 more sources

Memory Effects in High-Dimensional Systems Faithfully Identified by Hilbert–Schmidt Speed-Based Witness [PDF]

open access: yesEntropy, 2022
A witness of non-Markovianity based on the Hilbert–Schmidt speed (HSS), a special type of quantum statistical speed, has been recently introduced for low-dimensional quantum systems.
Kobra Mahdavipour   +4 more
doaj   +2 more sources

Hybrid Predistorter for Broadband Power Amplifiers Linearization With Relaxed DAC Speed in the Signal Transmit Path

open access: yesIEEE Access, 2022
This paper proposes a novel predistorter architecture suitable for hybrid baseband/RF implementation. The distortion function is split into a memory polynomial and an AM/AM only look-up table (LUT).
Anfal Alsayed Ali   +2 more
doaj   +1 more source

Work Extraction and Performance of Colloidal Heat Engines in Viscoelastic Baths

open access: yesFrontiers in Physics, 2021
A colloidal particle embedded in a fluid can be used as a microscopic heat engine by means of a sequence of cyclic transformations imposed by an optical trap.
Juan Ruben Gomez-Solano
doaj   +1 more source

Simultaneous Flow of Three Immiscible Fractional Maxwell Fluids ‎with the Clear and Hoamogeneous Porous Cylindrical Domain [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2020
One-dimensional transient flows of three layers immiscible fractional Maxwell fluids in a cylindrical domain have been investigated in the presence of a porous medium.
Abdul Rauf, Memona Naz
doaj   +1 more source

Исследования напряженно-деформированного состояния геосреды эманационными методами на примере α(t)-модели переноса радона

open access: yesVestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2023
Непрерывный мониторинг вариаций объемной активности радона с целью поиска ее аномальных значений, предшествующих сейсмическим событиям, является одной из эффективных методик исследования напряженно-деформированного состояния геосреды. Предлагается задача
Твёрдый, Д.А.   +2 more
doaj   +1 more source

Memory Effects in Repeated Survey Questions: Reviving the Empirical Investigation of the Independent Measurements Assumption

open access: yesSurvey Research Methods, 2020
It is common to repeat survey questions in the social sciences, for example to estimate test-retest reliability or in pretest-posttest experimental designs.
Hannah Schwarz   +2 more
doaj   +1 more source

A Weighted Linearization Method for Highly RF-PA Nonlinear Behavior Based on the Compression Region Identification

open access: yesApplied Sciences, 2021
In this paper, we present an adaptive modeling and linearization algorithm using the weighted memory polynomial model (W-MPM) implemented in a chain involving the indirect learning approach (ILA) as a linearization technique.
Jose Alejandro Galaviz-Aguilar   +6 more
doaj   +1 more source

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