Results 1 to 10 of about 804,012 (291)

Discrete Time Crystals

open access: yesAnnual Review of Condensed Matter Physics, 2020
Experimental advances have allowed for the exploration of nearly isolated quantum many-body systems whose coupling to an external bath is very weak. A particularly interesting class of such systems is those that do not thermalize under their own isolated quantum dynamics.
Dominic V Else   +2 more
exaly   +3 more sources

Discrete-Time Goldfishing

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2011
The original continuous-time ''goldfish'' dynamical system is characterized by two neat formulas, the first of which provides the N Newtonian equations of motion of this dynamical system, while the second provides the solution of the corresponding ...
Francesco Calogero
doaj   +5 more sources

High Bandwidth Control of a Piezo-Actuated Nanopositioning System Based on a Discrete-Time High-Order Dual-Loop Framework [PDF]

open access: yesSensors
Dual-loop control enhances the bandwidth of piezo-actuated nanopositioning systems via inner-loop state feedback controller suppressing lightly damped resonance and outer-loop tracking controller eliminating hysteresis nonlinearity.
Longhuan Yu   +2 more
doaj   +2 more sources

Application of the Lagrange-Sylvester formula to computation of the solution to state equations of fractional linear systems [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2021
The Lagrange-Sylvester formula is applied to the computation of the solutions of state equations of fractional continuous-time and discrete-time linear systems.
Tadeusz Kaczorek
doaj   +1 more source

New stability tests for fractional positive descriptor linear systems [PDF]

open access: yesArchives of Control Sciences, 2023
The asymptotic stability of fractional positive descriptor continuous-time and discretetime linear systems is considered. New sufficient conditions for stability of fractional positive descriptor linear systems are established.
Tadeusz Kaczorek, Andrzej Ruszewski
doaj   +1 more source

UKF-Based Neural Training for Nonlinear Systems Identification and Control Improvement

open access: yesIEEE Access, 2022
Numerous academic works have addressed the identification and control problem for complex dynamic systems. In recent decades, the use of control algorithms based on neural networks (NNs) has been highlighted, which have shown satisfactory results in the ...
Juan F. Guerra   +3 more
doaj   +1 more source

Coordinated Formation Control of Discrete-Time Autonomous Underwater Vehicles under Alterable Communication Topology with Time-Varying Delay

open access: yesJournal of Marine Science and Engineering, 2022
This paper is concerned with the coordinated formation control problem of multiple autonomous underwater vehicles (AUVs) under alterable communication topology and time-varying delay in discrete time domain.
Haomiao Yu, Zhenfang Zeng, Chen Guo
doaj   +1 more source

Practical and asymptotic stabilities for a class of delayed fractional discrete-time linear systems [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2019
The practical and asymptotic stabilities of delayed fractional discrete-time linear systems described by the model without a time shift in the difference are addressed. The D-decomposition approach is used for stability analysis.
A. Ruszewski
doaj   +1 more source

Discrete time quasicrystals [PDF]

open access: yesPhysical Review B, 2019
Version accepted for publication in Phys. Rev.
Giergiel, Krzysztof   +2 more
openaire   +3 more sources

State-Feedback Control in Descriptor Discrete-Time Fractional-Order Linear Systems: A Superstability-Based Approach

open access: yesApplied Sciences, 2021
In this article, the superstabilizing state-feedback control problem in descriptor discrete-time fractional-order linear (DDFL) systems with a regular matrix pencil is studied.
Kamil Borawski
doaj   +1 more source

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