Results 51 to 60 of about 230,401 (283)

The Regular Indefinite Linear Quadratic Optimal Control Problem: Stabilizable Case [PDF]

open access: yesSIAM Journal on Control and Optimization, 2018
This paper addresses an open problem in the area of linear quadratic optimal control. We consider the regular, infinite-horizon, stability-modulo-a-subspace, indefinite linear quadratic problem under the assumption that the dynamics are stabilizable.
Vukosavljev, Marijan   +2 more
openaire   +3 more sources

Imaging of Biphoton States: Fundamentals and Applications

open access: yesAdvanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

Feedback Control Method Using Haar Wavelet Operational Matrices for Solving Optimal Control Problems

open access: yesAbstract and Applied Analysis, 2013
Most of the direct methods solve optimal control problems with nonlinear programming solver. In this paper we propose a novel feedback control method for solving for solving affine control system, with quadratic cost functional, which makes use of only ...
Waleeda Swaidan, Amran Hussin
doaj   +1 more source

From Infinite to Finite Programs: Explicit Error Bounds with Applications to Approximate Dynamic Programming

open access: yes, 2017
We consider linear programming (LP) problems in infinite dimensional spaces that are in general computationally intractable. Under suitable assumptions, we develop an approximation bridge from the infinite-dimensional LP to tractable finite convex ...
Esfahani, Peyman Mohajerin   +3 more
core   +1 more source

Temperature‐Induced Nonvolatile Switching through Thermal Hysteresis in a Gd3Fe5O12/Ho3Fe5O12 Exchange‐Coupled Rare‐Earth Iron Garnet Bilayer

open access: yesAdvanced Functional Materials, EarlyView.
Reducing power consumption in spintronic memory remains a major challenge due to the need for high current densities. A bilayer of gadolinium and holmium iron garnets enables purely temperature‐induced, nonvolatile magnetic switching with bistable states within a ±25 K range. This approach achieves up to 66‐fold lower energy use than current spin–orbit
Junseok Kim   +3 more
wiley   +1 more source

Maximum Principle for Delayed Stochastic Linear-Quadratic Control Problem with State Constraint

open access: yesJournal of Applied Mathematics, 2013
This paper is concerned with one kind of delayed stochastic linear-quadratic optimal control problems with state constraints. The control domain is not necessarily convex and the control variable does not enter the diffusion coefficient.
Feng Zhang
doaj   +1 more source

Using block pulse functions for seismic vibration semi-active control of structures with MR dampers

open access: yesResults in Physics, 2018
This article applied the idea of block pulse functions in the semi-active control of structures. The BP functions give effective tools to approximate complex problems.
Saeed Rahimi Gendeshmin, Daniel Davarnia
doaj   +1 more source

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

open access: yesAdvanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source

Solving Non-Linear Quadratic Optimal Control Problems By Variational Iteration Method

open access: yesJournal of Mathematical Extension, 2014
In this article, we give an analytical approximate solution for non-linear quadratic optimal control problems using the variational iteration method (VIM).
R.ZARE, M.H.FARAHI, J.IZADIAN
doaj  

Robust Solution of the Multi-Model Singular Linear-Quadratic Optimal Control Problem: Regularization Approach

open access: yesAxioms, 2023
We consider a finite horizon multi-model linear-quadratic optimal control problem. For this problem, we treat the case where the problem’s functional does not contain a control function. The latter means that the problem under consideration is a singular
Valery Y. Glizer
doaj   +1 more source

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