Results 51 to 60 of about 1,917 (183)

Coupled Micromachined Magnetic Resonators for Microwave Signal Processing

Micromachines
In this paper, the theory, micromachining technology, and experimental results of the coupling of integrated magnetic film-based resonators for microwave signal filtering are presented.
Romolo Marcelli, Andrea Lucibello, Emanuela Proietti, Takuro Koike   +3 more
doaj   +1 more source

DONKIN'S DIFFERENTIAL OPERATORS FOR HOMOGENEOUS HARMONIC FUNCTIONS

St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019
The work continues the study of Donkin operators for homogeneous harmonic functions. Previously, a basic list of such first-order operators for three-dimensional harmonic functions was obtained.
Berdnikov Alexander, Gall Lidia, Gall Nikolaj, Solovyev Konstantin   +3 more
doaj   +1 more source

Magnetostatic Active Contour Model with Classification Method of Sparse Representation

Journal of Electrical and Computer Engineering, 2020
The active contour model is widely used to segment images. For the classical magnetostatic active contour (MAC) model, the magnetic field is computed based on the detected points by using an edge detector.
Guoqi Liu, Yifei Dong, Ming Deng, Yihang Liu   +3 more
doaj   +1 more source

3D finite element modeling of a permanent magnet linear actuator [PDF]

Serbian Journal of Electrical Engineering, 2008
The magnetostatic field and electromagnetic force of a linear actuator with a fixed permanent magnet and soft magnetic mover was studied using the 3D finite element method.
Yatchev Ivan, Ilieva Nikolina, Hinov Krastyo   +2 more
doaj   +1 more source

Hohenberg-Kohn theorems in electrostatic and uniform magnetostatic fields

The Journal of Chemical Physics, 2015
The Hohenberg-Kohn (HK) theorems of bijectivity between the external scalar potential and the gauge invariant nondegenerate ground state density, and the consequent Euler variational principle for the density, are proved for arbitrary electrostatic field and the constraint of fixed electron number. The HK theorems are generalized for spinless electrons
Xiao-Yin Pan, Viraht Sahni
openaire   +4 more sources

Electromagnetic Response of Two Interacting Topological Insulator Spheres in External Fields

Annalen der Physik, Volume 538, Issue 7, July 2026.
ABSTRACT We study the static electromagnetic response of two spherical topological insulators embedded in a dielectric medium and subjected to a uniform external electric field. The gapped surface states are described by a piecewise constant axion field, which induces a topological magnetoelectric coupling localized at the spherical interfaces.
J. Cornejo Gómez, M. Ibarra‐Meneses, L. Medel Onofre, A. Martín‐Ruiz   +3 more
wiley   +1 more source

Evaluation of magnetic field’s uniformity inside electromagnetic coils using graphene

AIP Advances, 2018
The distribution of the magnetic field in electromagnetic coils, such as those employed in magnetic resonance imaging (MRI), is evaluated in this paper, through graphene gyrotropic properties.
Stamatios A. Amanatiadis, Nikolaos V. Kantartzis, Tadao Ohtani, Yasushii Kanai   +3 more
doaj   +1 more source

GENERALIZATION OF THE THOMSON FORMULA FOR HOMOGENEOUS HARMONIC FUNCTIONS

St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019
It is shown that the Thomson formula for three-dimensional harmonic homogeneous functions can be generalized if, instead of purely algebraic linear expressions, one uses a linear algebraic form with the participation of the first order partial ...
Berdnikov Alexander, Gall Lidia, Gall Nikolaj, Solovyev Konstantin   +3 more
doaj   +1 more source

Microstructure Engineering Toward High Cost‐Effective Nd–Fe–B Sintered Magnets: A Review

Rare Metals, Volume 45, Issue 7, July 2026.
ABSTRACT Nd–Fe–B sintered magnets, critical for enhancing electromechanical conversion efficiency and operational stability in wind turbines and electric vehicle drives, are prized for their outstanding coercivity, high remanence, and superior maximum energy product.
Dongmin Zhang, Minggang Zhu, Xu Sun, Qisong Sun, Xiaolong Song, Jingyan Zuo   +5 more
wiley   +1 more source

Simplified method for analytically determining the external magnetostatic field of uncertain extended technical objects based on near-field measurements

Electrical engineering & Electromechanics
Introduction. An important scientific and technical problem of magnetism of uncertain extended energy-saturated objects - such as naval vessels and submarines is implementation of strict requirements for magnetic silence based on mathematical modeling of
B. I. Kuznetsov, T. B. Nikitina, I. V. Bovdui, K. V. Chunikhin, V. V. Kolomiets, I. V. Nefodova   +5 more
doaj   +1 more source