Results 41 to 50 of about 1,347,601 (289)

Numerical Modeling of Marine Circulation with 4D Variational Data Assimilation

Journal of Marine Science and Engineering, 2020
The technology is presented for modeling and prediction of marine hydrophysical fields based on the 4D variational data assimilation technique developed at the Marchuk Institute of Numerical Mathematics, Russian Academy of Sciences (INM RAS).
Vladimir Zalesny, Valeriy Agoshkov, Victor Shutyaev, Eugene Parmuzin, Natalia Zakharova   +4 more
doaj   +1 more source

Variational schemes in the Fokker - Planck equation [PDF]

Journal of Physics A: Mathematical and General, 1996
We investigate variational methods for finding approximate solutions to the Fokker-Planck equation, especially in cases lacking detailed balance. These schemes fall into two classes: those in which a Hermitian operator is constructed from the (non-Hermitian) Fokker-Planck operator, and those which are based on soluble approximations to this operator ...
Blum, T., McKane, A. J.
openaire   +4 more sources

Fractional View Analysis of Acoustic Wave Equations, Using Fractional-Order Differential Equations

Applied Sciences, 2020
In the present research work, a newly developed technique which is known as variational homotopy perturbation transform method is implemented to solve fractional-order acoustic wave equations.
Izaz Ali, Hassan Khan, Rasool Shah, Dumitru Baleanu, Poom Kumam, Muhammad Arif   +5 more
doaj   +1 more source

The variational iteration method for solving linear and nonlinear Schrodinger equations [PDF]

Iranian Journal of Numerical Analysis and Optimization, 2009
In this paper, the variational iteration method proposed by Ji-Huan He is applied to solve both linear and nonlinear Schrodinger equations. The main property of the method is in its flexibility and ability to solve linear and nonlinear equations ...
B. Jazbi, M. Moini
doaj   +1 more source

Bone Mineral Density After Contemporary Treatment for Acute Lymphoblastic Leukaemia: A Matched Cross‐Sectional Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Reduced bone mineral density (BMD) has been reported in survivors of childhood and young adult acute lymphoblastic leukaemia (ALL); however, data from cohorts treated with contemporary protocols and including matched controls remain limited.
Karen Schow Jensen, Mette Tiedemann Skipper, Niels Holtum Birkebæk, Kjeld Schmiegelow, Thomas Leth Frandsen, Bente Langdahl, Rikke Beck Jensen, Asger Roer Pedersen, Christian Mølgaard, Liv Andrés‐Jensen, Birgitte Klug Albertsen   +10 more
wiley   +1 more source

‎Exact analytical solution of tempered fractional heat-like (diffusion) equations by the modified variational iteration method [PDF]

Journal of Mahani Mathematical Research
‎    This paper introduces a modified version of the Variational Iteration Method, incorporating $\mathbb{P}$-transformation. We propose a novel semi-analytical technique named the modified variational iteration method   for addressing fractional ...
Mohammad Hossein Akrami, Abbas Poya, Mohammad Ali Zirak   +2 more
doaj   +1 more source

Geometric Discretization of Lagrangian Mechanics and Field Theories [PDF]

, 2009
This thesis presents a unified framework for geometric discretization of highly oscillatory mechanics and classical field theories, based on Lagrangian variational principles and discrete differential forms. For highly oscillatory problems in mechanics,
Stern, Ari Joshua
core   +1 more source

Bone and Soft Tissue Neoplasms in Infants Versus Older Children: A Report From the Cancer in Young People in Canada Program

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background and Aims Infant bone and soft tissue neoplasms present distinct clinical challenges and lack large‐scale data to inform treatment decisions. This study aims to characterize bone and soft tissue neoplasms in infants in Canada and to compare their outcomes with those of older pediatric patients.
Samuel Sassine, Hallie Coltin, Maria Kondyli, Monia Marzouki, Nicolas Prud'homme, Nida Usmani, Rebecca J. Deyell, Lesleigh Abbott, Tony H. Truong, Sapna Oberoi, Ketan Kulkarni, Josée Brossard, Lynette Bowes, Paul Gibson, Sarah McKillop, Roona Sinha, Lillian Sung, Catherine Vezina, Laura Wheaton, Alexandra P. Zorzi, Marie‐Claude Pelland‐Marcotte, Thai Hoa Tran   +21 more
wiley   +1 more source

Dyson–Schwinger Approach to Hamiltonian QCD

EPJ Web of Conferences, 2017
Dyson–Schwinger equations are an established, powerful non-perturbative tool for QCD. In the Hamiltonian formulation of a quantum field theory they can be used to perform variational calculations with non-Gaussian wave functionals.
Campagnari Davide, Reinhardt Hugo, Huber Markus Q., Vastag Peter, Ebadati Ehsan   +4 more
doaj   +1 more source

Some Variations on Maxwell’s Equations [PDF]

, 2007
In the first sections of this article, we discuss two variations on Maxwell's equations that have been introduced in earlier work--a class of nonlinear Maxwell theories with well-defined Galilean limits (and correspondingly generalized Yang-Mills equations), and a linear modification motivated by the coupling of the electromagnetic potential with a ...
Ascoli, Giorgio A., Goldin, Gerald A.
openaire   +2 more sources