Results 111 to 120 of about 12,436,371 (298)

Quadratures of Pontryagin extremals for optimal control problems [PDF]

open access: yes, 2006
We obtain a method to compute effective first integrals by combining Noether's principle with the Kozlov-Kolesnikov integrability theorem. A sufficient condition for the integrability by quadratures of optimal control problems with controls taking values
Rocha, E. A.   +3 more
core   +2 more sources

Optimal Control and Sustainability

open access: yes, 2022
reservedThe aim of the thesis is to deal with applications of optimal control models combined with sustainability. Starting with an overview of what optimal control and sustainability are, we, then, analyze different application of those two concepts to ...
SCHIAVON, MICHELE
core  

Time‐optimal finite control set model predictive control of non‐isolated DC–DC converters

open access: yesIET Electric Power Applications
The authors propose a time‐optimal finite control‐set model predictive control (FCS‐MPC) formulation, generalised to the three most common non‐isolated DC–DC converters (buck, boost, buck–boost) tracking a constant switching frequency.
Thibaut Harzig, Brandon Grainger
doaj   +1 more source

Quaternary Boundary Optimal Control Problem for Quaternary Nonlinear Elliptic System with Constraints

open access: yesAl-Mustansiriyah Journal of Science
Background: Boundary optimal control problems governed by nonlinear elliptic systems are complex, involving equality and inequality constraints. Objective: This paper examines a quaternary boundary optimal control vector problem (QBOCVP) regulated by a ...
Alaa S. Khneab   +2 more
doaj   +1 more source

Intrapatient tumour heterogeneity and clonal evolution in an autopsy study of metastatic salivary gland cancer

open access: yesMolecular Oncology, EarlyView.
Tumour heterogeneity and clonal evolution of metastatic salivary gland cancer were evaluated in two patients with adenoid carcinoma and one patient with myoepithelial carcinoma. Radiology‐guided autopsy enabled multi‐region sampling (total samples n = 149), followed by whole‐genome sequencing and phylogenetic reconstruction (17 tumour samples, 4–7 per ...
Gerben Lassche   +10 more
wiley   +1 more source

Numerical simulation of boundary-layer control using MEMS actuation [PDF]

open access: yes
MEMS actuators and their effect on boundary layers is investigated using numerical simulation. The thesis is specifically focussed on jet actuators and their application to the targeted control of turbulent boundary layers.
Lockerby, Duncan A.
core  

Optimal shape design and unilateral boundary value problems. I.

open access: yes, 1988
In the first part we give a general existence theorem and a regularization method for an optimal control problem where the control is a domain in R″ and where the system is governed by a state relation which includes differential equations as well as ...
Haslinger, Jaroslav   +3 more
core   +1 more source

On non-variational solutions to optimal boundary control problems for parabolic equations

open access: yesVìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Matematika, 2014
We study an optimal boundary control problem (OCP) associated to the linear parabolic equation $y_t - \mathrm{div}(\nabla y + A(x) \nabla y) = f$. The characteristic feature of this equation is the fact that the matrix $A(x) = [a_{ij}(x)]_{i,j=1,...,N ...
S.O. Gorbonos, P.I. Kogut
doaj  

Somatostatin receptor 4 (SSTR4) is a tumor suppressor in cutaneous and head & neck squamous cell carcinomas

open access: yesMolecular Oncology, EarlyView.
This study identifies somatostatin receptor 4 (Sstr4) as a critical tumor suppressor against skin and head/neck cancers (HNSCC, cSCC, and BCC). The loss of Sstr4 removes a check on cell growth, causing hyperactivation of the MAPK‐ERK signaling pathway (↑).
Ali Taqvi   +6 more
wiley   +1 more source

On an optimal boundary control problem for a parabolic system

open access: yes, 2017
This paper is concerned with an optimal control problem governed by a parabolic equation. One of the boundary conditions of this equation is not given by known function, but it belongs to a certain set. We prove the existence, uniqueness and stability for the optimal control problem under some conditions and present an variational inequality for the ...
TOYOĞLU, FATMA   +2 more
openaire   +2 more sources

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