Results 91 to 100 of about 692,162 (247)

Distributed Energy Resources Integration in AC Grids: a Family of Passivity-Based Controllers

Revista Iberoamericana de Automática e Informática Industrial RIAI, 2019
This paper presents the design and application of passivity–based control theory for distributed energy resources (DERs) integration through voltage source converters (VSC) in ac single–phase grids.
Oscar Danilo Montoya, Walter Gil-González, Sofía Avila-Becerril, Alejandro Garces, Gerardo Espinosa-Pérez   +4 more
doaj   +1 more source

Optimized pulses for the control of uncertain qubits

, 2012
Constructing high-fidelity control fields that are robust to control, system, and/or surrounding environment uncertainties is a crucial objective for quantum information processing. Using the two-state Landau-Zener model for illustrative simulations of a
A. Messiah, C. Brif, D. A. Lidar, F. Gaitan, G. G. Balint-Kurti, J. E. Levy, J. Ruths, J. W. Milnor, Jason M. Dominy, M. P. do Carmo, Malcolm S. Carroll, Matthew D. Grace, R. Abraham, S. J. van Enk, V. Guillemin, W. H. Press, Wayne M. Witzel   +16 more
core   +1 more source

Mixed-state fidelity susceptibility through iterated commutator series expansion

, 2014
We present a perturbative approach to the problem of computation of mixed-state fidelity susceptibility (MFS) for thermal states. The mathematical techniques used provides an analytical expression for the MFS as a formal expansion in terms of the ...
Tonchev, N. S.
core   +1 more source

Engineering non-equilibrium quantum phase transitions via causally gapped Hamiltonians

New Journal of Physics, 2018
We introduce a phenomenological theory for many-body control of critical phenomena by engineering causally-induced gaps for quantum Hamiltonian systems. The core mechanisms are controlling information flow within and/or between clusters that are created ...
Masoud Mohseni, Johan Strumpfer, Marek M Rams   +2 more
doaj   +1 more source

Operator theoretic approach to optimal control problems characterized by the Caputo fractional differential equations

Results in Control and Optimization, 2023
In this paper, our aim is to solve an optimal control problem by using an operator theoretic approach in the sense of Caputo fractional derivative. We first reduce the fractional dynamical system into an equivalent Hammerstein operator equation and then ...
M. Vellappandi, V. Govindaraj
doaj  

Optimal Control of Engine Warmup in Hybrid Vehicles

Oil & Gas Science and Technology, 2016
An Internal Combustion Engine (ICE) under cold conditions experiences increased friction losses due to a high viscosity of the lubricant. With the additional control freedom present in hybrid electric vehicles, the losses during warmup can be minimized ...
van Reeven Vital, Hofman Theo, Willems Frank, Huisman Rudolf, Steinbuch Maarten   +4 more
doaj   +1 more source

Time-dependent Gutzwiller simulation of Floquet topological superconductivity

Communications Physics
Periodically driven systems provide a novel route to control the topology of quantum materials. In particular, Floquet theory allows an effective band description of periodically-driven systems through the Floquet Hamiltonian.
Takahiro Anan, Takahiro Morimoto, Sota Kitamura   +2 more
doaj   +1 more source

H∞Excitation Control Design for Stochastic Power Systems with Input Delay Based on Nonlinear Hamiltonian System Theory [PDF]

, 2015
Weiwei Sun, Lianghong Peng, Ying Zhang, Huaidan Jia   +3 more
openalex   +1 more source

Relational Observables in Gravity: a Review

Symmetry, Integrability and Geometry: Methods and Applications, 2012
We present an overview on relational observables in gravity mainly from a loop quantum gravity perspective. The gauge group of general relativity is the diffeomorphism group of the underlying manifold.
Johannes Tambornino
doaj   +1 more source

Optimal control of Cocoa Black pod disease: A multi-pronged approach

Franklin Open
This study presents a novel approach to controlling cocoa black pod disease, caused by Phytophthora megakarya. Unlike previous methods, we employ a mathematical modeling framework based on Pontryagin’s Maximum Principle to optimize control strategies ...
A.O. Adeniran, A.S. Onanaye, O.J. Adeleke   +2 more
doaj