A unitary correlation operator method [PDF]
Nuclear Physics A, 1997 The short range repulsion between nucleons is treated by a unitary correlation operator which shifts the nucleons away from each other whenever their uncorrelated positions are within the replusive core. By formulating the correlation as a transformation
Afnan +30 more
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Composite Operator Method Analysis of the Underdoped Cuprates Puzzle [PDF]
Advances in Condensed Matter Physics, 2014 The microscopical analysis of the unconventional and puzzling physics of the underdoped cuprates, as carried out lately by means of the composite operator method (COM) applied to the 2D Hubbard model, is reviewed and systematized.
Adolfo Avella
doaj +4 more sources
OPERATOR METHOD IN THE PROBLEM OF A PLANE ELECTROMAGNETIC WAVE DIFFRACTION BY AN ANNULAR SLOT IN THE PLANE OR BY A RING [PDF]
Radio Physics and Radio Astronomy, 2021 Purpose: The problem of a plane electromagnetic wave diffraction by an annular slot in the perfectly conducting zero thickness plane is considered.
M. E. Kaliberda +2 more
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AN OPERATOR METHOD FOR THE PROBLEM OF PLANE WAVE DIFFRACTION BY INFINITELY THIN, PERFECTLY CONDUCTING HALF-PLANE AND TWO DISKS [PDF]
Radio Physics and Radio Astronomy, 2022 Subject and Purpose. Considered in the paper is diffraction of a plane wave by a structure involving a half-plane and two disks. The disks and the half-plane, lying within parallel planes, are assumed to be infinitely thin and perfectly conducting.
M. E. Kaliberda +2 more
doaj +1 more source
OPERATOR METHOD IN THE PROBLEM OF THE H-POLARIZED WAVE DIFFRACTION BY TWO SEMI-INFINITE GRATINGS PLACED IN THE SAME PLANE [PDF]
Radio Physics and Radio Astronomy, 2021 Purpose: Problem of the H-polarized plane wave diffraction by the structure, which consists of two semi-infinite strip gratings, is considered. The gratings are placed in the same plane. The gap between the gratings is arbitrary. The purpose of the paper
M. E. Kaliberda +2 more
doaj +1 more source
Operational Research: methods and applications [PDF]
Journal of the Operational Research Society, 2023 Throughout its history, Operational Research has evolved to include a variety of methods, models and algorithms that have been applied to a diverse and wide range of contexts. This encyclopedic article consists of two main sections: methods and applications.
Petropoulos, Fotios +82 more
openaire +9 more sources
Transmutation Operator Method for Solving Heat Conduction Problem [PDF]
EPJ Web of Conferences, 2021 The transmutation operator method is extended to the case of functions of two variables. The transmutation operator flattens the function, i.e. the transmutation operator replaces a function with discontinuous partial derivatives on the coordinate axes ...
Yaremko Oleg, Yaremko Natalia
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OPERATOR METHOD IN THE PROBLEM OF AN H-POLARIZED PLANE WAVE DIFFRACTION BY A DOUBLE-LAYER INFINITE PERIODIC STRIP GRATING IN THE ABSENCE OF ONE STRIP IN EVERY LAYER [PDF]
Radio Physics and Radio Astronomy, 2020 Purpose: The problem of an H-polarized plane wave diffraction by the infinite double-layer non-ideally periodic strip grating is considered. The grating is obtained from the ideally-periodic one by excluding of a single strip in each layer.
M. E. Kaliberda +2 more
doaj +1 more source
Two approaches for automating analysis of electromagnetic processes in non-linear circuits with valves [PDF]
E3S Web of Conferences, 2019 This article analyses and compares two approaches related to automating modeling of valve electric circuits with piecewise linear approximation of valve characteristics. The first approach is based on operator equivalent circuits’ analytical formulas and
Sapaev Khushnud, Umarov Shukhrat
doaj +1 more source
Cartesian Operator Factorization Method for Hydrogen
Atoms, 2022 We generalize Schrödinger’s factorization method for Hydrogen from the conventional separation into angular and radial coordinates to a Cartesian-based factorization.
Xinliang Lyu +2 more
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