Results 21 to 30 of about 1,071 (239)

Carroll membranes

open access: yesJournal of High Energy Physics, 2019
We explore Carroll limit corresponding to M2 as well as M3 branes propagating over 11D supergravity backgrounds in M theory. In the first part of the analysis, we introduce the membrane Carroll limit associated to M2 branes propagating over M theory ...
Dibakar Roychowdhury
doaj   +1 more source

Hamilton-Jacobi Equations with State Constraints [PDF]

open access: yesTransactions of the American Mathematical Society, 1990
In the present paper we consider Hamilton-Jacobi equations of the form H ( x , u
CAPUZZO DOLCETTA, Italo, P. L. Lions
openaire   +1 more source

On optimal periodic solution of differential equations

open access: yesJournal of Kufa for Mathematics and Computer, 2018
this paper dedicated to the construction of solution of a three time scale periodic singular perturbed non-linear quadratic optimal control problem by using the direct method.
Methaq Hamza Geem
doaj   +1 more source

Payload motion control for a varying length flexible gantry crane

open access: yesAutomatika, 2021
Cranes play a very important role in transporting heavy loads in various industries. However, because of its natural swinging characteristics, the control of crane needs to be considered carefully.
Tung Lam Nguyen   +2 more
doaj   +1 more source

Size dependent free vibration analysis of functionally graded piezoelectric micro/nano shell based on modified couple stress theory with considering thickness stretching effect

open access: yesDefence Technology, 2021
Higher-order shear and normal deformation theory is used in this paper to account thickness stretching effect for free vibration analysis of the cylindrical micro/nano shell subjected to an applied voltage and uniform temperature rising.
Maryam Lori Dehsaraji   +2 more
doaj   +1 more source

An expansion term in Hamilton's equations [PDF]

open access: yesEurophysics Letters (EPL), 1999
For any given spacetime the choice of time coordinate is undetermined. A particular choice is the absolute time associated with a preferred vector field. Using the absolute time Hamilton's equations are $- (δH_{c})/(δq)=\dotπ+Θπ, $+ (δH_{c})/(δπ)=\dot{q}$, where $Θ= V^{a}_{.;a}$ is the expansion of the vector field.
openaire   +2 more sources

Analytical mechanics methods in finite element analysis of multibody elastic system

open access: yesBoundary Value Problems, 2023
The study of multibody systems with elastic elements involves at the moment the reevaluation of the classical methods of analysis offered by analytical mechanics.
Maria Luminita Scutaru   +2 more
doaj   +1 more source

Vibration Suppression Control of a Flexible Gantry Crane System with Varying Rope Length

open access: yesJournal of Control Science and Engineering, 2019
The paper presents a control approach to a flexible gantry crane system. From Hamilton’s extended principle the equations of motion that characterized coupled transverse-transverse motions with varying rope length of the gantry is obtained. The equations
Tung Lam Nguyen   +2 more
doaj   +1 more source

Nonlocal state-space strain gradient wave propagation of magneto thermo piezoelectric functionally graded nanobeam

open access: yesCurved and Layered Structures, 2023
In this work, the state -space nonlocal strain gradient theory is used for the vibration analysis of magneto thermo piezoelectric functionally graded material (FGM) nanobeam.
Selvamani Rajendran   +3 more
doaj   +1 more source

Invariante adiabático gerado por lenta variação de coordenada generalizada

open access: yesRevista Brasileira de Ensino de Física
Apresentamos estudo de sistema mecânico em que uma coordenada generalizada está sujeita a lenta variação, realizado através de tratamento hamiltoniano no qual se permite a ação de força generalizada ao longo daquela coordenada, gerando o invariante ...
G.F. Leal Ferreira
doaj   +1 more source

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