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Journal articles on the topic 'Heterogeneous electromagnetic field'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Zhukovskiy, Mikhail Evgenievich, and Varvara Alekseevna Egorova. "Modeling of the radiation induced electromagnetic field in finely-disperse media." Mathematica Montisnigri 52 (2021): 52–65. http://dx.doi.org/10.20948/mathmontis-2021-52-6.

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Algorithms for supercomputer modeling of the radiation electromagnetic field in heterogeneous materials of a complex finely-dispersed structure are constructed. A geometric model of a heterogeneous medium is created using Stilinger-Lubachevsky algorithms for multimodal structures. The model includes a system of detectors for statistical evaluation of functionals on the space of solutions of the photon-electron cascade transport equations. Algorithms for the three-dimensional approximation of the results of modeling the radiation transport in a fine-dispersed medium to an electrodynamic differe

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2

Grinchik, N. N., and Yu N. Grinchik. "Fundamental Problems of the Electrodynamics of Heterogeneous Media." Physics Research International 2012 (April 8, 2012): 1–28. http://dx.doi.org/10.1155/2012/185647.

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The consistent physic-mathematical model of propagation of an electromagnetic wave in a heterogeneous medium is constructed using the generalized wave equation and the Dirichlet theorem. Twelve conditions at the interfaces of adjacent media are obtained and justified without using a surface charge and surface current in explicit form. The conditions are fulfilled automatically in each section of counting schemes for calculations. A consistent physicomathematical model of interaction of nonstationaly electric and thermal fields in a layered medium with allowance or mass transfer is constructed.

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Choroszucho, Agnieszka, Boguslaw Butrylo, Adam Steckiewicz, and Jacek Maciej Stankiewicz. "Determination of the Effective Electromagnetic Parameters of Complex Building Materials for Numerical Analysis of Wireless Transmission Networks." Electronics 9, no. 10 (2020): 1569. http://dx.doi.org/10.3390/electronics9101569.

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In this paper, we present the method for determination of effective electromagnetic parameters of complex building materials. By application of the proposed algorithm, it is possible to analyze electromagnetic field distribution for large-scale problems with heterogeneous materials. The two-dimensional numerical model of building components (hollow brick) with periodic boundary conditions was solved using the finite-difference time-domain method (FDTD) and discussed. On this basis, the resultant transmission coefficient was found and then the equivalent relative permeability and electric condu

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List, Nanna Holmgaard, Hans Jørgen Aagaard Jensen, and Jacob Kongsted. "Local electric fields and molecular properties in heterogeneous environments through polarizable embedding." Physical Chemistry Chemical Physics 18, no. 15 (2016): 10070–80. http://dx.doi.org/10.1039/c6cp00669h.

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Effective external field effects in spectroscopies of molecules in heterogeneous environments, i.e., the implications of the additional environment polarization induced by the probing electromagnetic field, can be significant and depart remarkably from the simple Onsager picture.

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Mendoza, Gaston, Guillaume Blanchy, Ellen Van De Vijver, Jeroen Verhegge, Wim Cornelis, and Philippe De Smedt. "Quantitative soil characterization using the frequency domain electromagnetic induction method in heterogeneous fields." Hydrology and Earth System Sciences 29, no. 13 (2025): 2837–50. https://doi.org/10.5194/hess-29-2837-2025.

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Abstract. The frequency domain electromagnetic induction (FDEM) method is a widely used tool for geophysical soil exploration. Field surveys using FDEM provide apparent electrical conductivity (ECa), which is typically used for qualitative interpretations. Quantitative estimations of soil properties remain challenging, especially in heterogeneous fields. Quantitative approaches are based on either deterministic or empirical modeling. While the deterministic approach faces limitations related to instrumental drift, data calibration, inversion, and pedophysical modeling, the empirical approach r

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Zlygostev, I. N., S. I. Trashkeev, P. A. Statsenko, and E. S. Khlystun. "Numerical solution of a direct problem of the method of transient signals using a new formulation of Maxwell's equations." Russian Journal of Geophysical Technologies, no. 4 (April 9, 2025): 64–74. https://doi.org/10.18303/2619-1563-2024-4-64.

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A new approach to solving the direct problem of non-stationary electrodynamics in a complete formulation for a heterogeneous geological environment is proposed. The new formulation of Maxwell's equations makes it possible to write down the equations of the electromagnetic field for potentials in the form of a system of first-order hyperbolic type equations. Information about the spatial distribution of specific electrical conductivity in the geological environment is contained in the electromagnetic response – the reaction of the medium to external electromagnetic influence.

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Katyal, Jyoti. "Al-Au Heterogeneous Dimer-trimer Nanostructure for SERS." Nanoscience & Nanotechnology-Asia 10, no. 1 (2020): 21–28. http://dx.doi.org/10.2174/2210681208666180821141727.

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: Tunability in resonance wavelength and the enhancement of the electromagnetic field intensities around the surface are two unique properties which make metal as a plasmonic material. A theoretical investigation on the LSPR and field enhancement for heterogeneous dimer–trimer metallic nanostructure by constituting Al and Au as two different plamsonic materials has been studied. Since electrons in Al exhibit free behavior for LSPR of Au, therefore, they influence the electric field magnitude generated by Au LSPR. Methods: The electromagnetic simulations reported in this paper were performed us

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Bruzzone, S., M. Malvaldi, G. P. Arrighini, and C. Guidotti. "Electromagnetic Coupling in Near-Field Scattering by Small Homogeneous and Heterogeneous Nanoaggregates." Journal of Physical Chemistry B 109, no. 50 (2005): 23808–15. http://dx.doi.org/10.1021/jp0538518.

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Zhyla, O., та N. Stognii. "SPAСETIME ANALYSIS OF AN ELECTROMAGNETIC AIRY PULSE AFTER ITS INTERACTION WITH A PLANAR BOUNDARY IN UNIFORMLY ACCELERATED RELATIVISTIC MOTION". Radio physics and radio astronomy 29, № 4 (2024): 271–80. https://doi.org/10.15407/rpra29.04.271.

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Subject and Purpose. The transformation peculiarities that the electromagnetic pulses get when heading towards a boundary that per- forms uniformly accelerated relativistic motion are the present paper concern. A smooth non-stationarity case when the boundary velocity gradually changes from zero to the pulse velocity value is considered, with a focus on the spacetime distribution and evolution of the electromagnetic Airy pulse field. Methods and methodology. The study and analysis are carried out by the method of Volterra integral equations which can describe electromagnetic wave propagation i

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Samluk, Jesse P., Cathleen A. Geiger, and Chester J. Weiss. "Full-physics 3-D heterogeneous simulations of electromagnetic induction fields on level and deformed sea ice." Annals of Glaciology 56, no. 69 (2015): 405–14. http://dx.doi.org/10.3189/2015aog69a737.

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AbstractIn this paper we explore simulated responses of electromagnetic (EM) signals relative to in situ field surveys and quantify the effects that different values of conductivity in sea ice have on the EM fields. We compute EM responses of ice types with a three-dimensional (3-D) finite-volume discretization of Maxwell’s equations and present 2-D sliced visualizations of their associated EM fields at discrete frequencies. Several interesting observations result: First, since the simulator computes the fields everywhere, each gridcell acts as a receiver within the model volume, and captures

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Ижовкина, Н.И., С.Н. Артеха, Н.С. Ерохин, and Л.А. Михайловская. "SPIRAL FLOW STRUCTURES IN THE AEROSOL ATMOSPHERIC PLASMA." Инженерная физика, no. 7 (August 27, 2016): 57–68. https://doi.org/10.5281/zenodo.2579052.

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Strong electric fields are frequently observed in atmospheric clouds. The occurrence of vortex structures in a heterogeneous gyrotropic medium is stochastically determined. The gyrotropy of the ionosphere and the atmosphere is associated with Coriolis force, and with the movement of charged particles in the geomagnetic field. The vortices of plasma nature are generated in the atmosphere. Nonmonotonic stratification of unstable plasma irregularities contributes to the formation of cellular structures. A manifestation of the electric field of plasma vortices is possible for the pressure gradient

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12

Booth, James C., Nathan Orloff, Christian Long, et al. "(Invited, Digital Presentation) Nonlinear and Electro-Thermo-Mechanical Effects in Heterogeneous Electronics at Microwave Frequencies." ECS Meeting Abstracts MA2022-02, no. 17 (2022): 862. http://dx.doi.org/10.1149/ma2022-0217862mtgabs.

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Materials properties are an essential component for the accurate modeling of integrated devices and circuits. The accuracy of such models depends explicitly on the accuracy of the input material parameters and interfaces between them. With the trend toward increasing heterogeneous integration, the relationships between electromagnetic, thermal, and mechanical material properties of heterogeneously integrated devices are even more important. Recent trends toward co-design emphasize the optimization of all aspects of circuit performance from the beginning, rather than sequentially optimizing the

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Carcione, José M. "A spectral numerical method for electromagnetic diffusion." GEOPHYSICS 71, no. 1 (2006): I1—I9. http://dx.doi.org/10.1190/1.2159050.

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I present a pseudospectral explicit scheme that can simulate low-frequency electromagnetic (EM) propagation in the earth. This scheme solves linear periodic parabolic equations, having accuracy within machine precision, both temporally and spatially. The method is based on a Chebyshev expansion of the evolution operator, with the spatial derivatives computed via a staggered Fourier pseudospectral technique. The results match analytical solutions of the initial-value problem and the Green's function. An example of the EM field produced by a set of magnetic sources in a heterogeneous model illus

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Valentyn, Glyva, Kasatkina Natalia, Nazarenko Vasyl, et al. "DEVELOPMENT AND STUDY OF PROTECTIVE PROPERTIES OF THE COMPOSITE MATERIALS FOR SHIELDING THE ELECTROMAGNETIC FIELDS OF A WIDE FREQUENCY RANGE." Eastern-European Journal of Enterprise Technologies 2, no. 12 (104) (2020): 40–47. https://doi.org/10.15587/1729-4061.2020.201330.

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Composites were shown to be the most promising materials for protection against electromagnetic fields. A technology of magnetic treatment of textile material with magnetic fluid and technology of ultrasonic treatment of a mixture of latex and iron ore concentrate has been developed. This has increased saturation of fibers of the textile material with magnetic fluid nanoparticles, dispersity of the iron ore concentrate, and isotropy of the liquid metal-polymer material. As a result of the use of this technology, the consumption of magnetic fluid for the treatment of the textile material decrea

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15

Singer, B. Sh, and E. B. Fainberg. "Modelling of electromagnetic fields in thin heterogeneous layers with application to field generation by volcanoes-theory and example." Geophysical Journal International 138, no. 1 (1999): 125–45. http://dx.doi.org/10.1046/j.1365-246x.1999.00844.x.

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Karpowicz, Jolanta, Patryk Zradziński, Jarosław Kieliszek, Krzysztof Gryz, Jaromir Sobiech, and Wiesław Leszko. "An In Situ and In Silico Evaluation of Biophysical Effects of 27 MHz Electromagnetic Whole Body Humans Exposure Expressed by the Limb Current." BioMed Research International 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/5785482.

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Objectives. The aim was to evaluate correlations between biophysical effects of 27 MHz electromagnetic field exposure in humans (limb induced current (LIC)) and (1) parameters of affecting heterogeneous electric field and (2) body anthropometric properties, in order to improve the evaluation of electromagnetic environmental hazards. Methods. Biophysical effects of exposure were studied in situ by measurements of LIC in 24 volunteers (at the ankle) standing near radio communication rod antenna and in silico in 4 numerical body phantoms exposed near a model of antenna. Results. Strong, positive,

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Han, Qiyu, and Zhijing (Zee) Wang. "Time‐domain simulation of SH-wave‐induced electromagnetic field in heterogeneous porous media: A fast finite‐element algorithm." GEOPHYSICS 66, no. 2 (2001): 448–61. http://dx.doi.org/10.1190/1.1444936.

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When a horizontally polarized rotational mechanical wave (SH-wave) travels through a porous rock, acceleration of the rock frame induces a streaming current in the SH particle motion plane. This streaming current is parallel to the particle displacement and has an associated electromagnetic (EM) field. This phenomenon is often described as the electroseismic (EOS) conversion. Numerically, the EOS phenomenon can be simulated in either the frequency or the time domain. Frequency‐domain numerical simulation has huge memory and computational requirements. Traditional time‐domain simulation, on the

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18

Yoon, Sangwoo, Kye Sang Yoo, and Joohan Kim. "Effect of Pd Ions on the Generation of Ag and Au Heterogeneous Nanoparticles Using Laser Ablation in Liquid." Applied Sciences 11, no. 4 (2021): 1394. http://dx.doi.org/10.3390/app11041394.

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Heterogeneous Ag/Au nanoparticles combined with Pd ions were generated by irradiating Ag/Au metal targets in a Pd solution with nanosecond and femtosecond lasers. AgPd and AuPd nanoparticles were generated by laser fragmentation and bonded. We numerically analyzed the hot spots with electromagnetic field enhancement of nanoparticles of different sizes separated by various distances. AgPd and AuPd nanoparticles differing in diameter were generated and showed different characteristics compared to typical core-shell heterogeneous nanoparticles. Pd ions played an important role in the generation o

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Aksenchyk, A. V., and I. F. Kirynovich. "Simulation of High-Power Klystrons with Heterogeneous Focusing Magnetic Field." Doklady BGUIR 20, no. 2 (2022): 94–98. http://dx.doi.org/10.35596/1729-7648-2022-20-2-94-98.

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The work shows a significant effect of the focusing magnetic field on the output characteristics of the klystron. When the calculations are done using nonlinear one-dimensional models, optimization of the parameters makes it possible to obtain versions of devices with the efficiency of 0.8 – 0.9 and higher. However, when testing these options using nonlinear two-dimensional models that take into account the radial motion of electrons, there is a significant discrepancy in the output characteristics obtained from the one-dimensional and two-dimensional models. This is due to the fact that durin

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NABUTOVSKII, V. M., and V. R. BELOSLUDOV. "VAN DER WAALS CONTRIBUTION TO THE THERMODYNAMICAL PROPERTIES OF THE CURVILINEAR SURFACES." International Journal of Modern Physics B 03, no. 02 (1989): 171–210. http://dx.doi.org/10.1142/s0217979289000154.

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This article is a review of our papers devoted to the application of the Lifshitz, Dzjaloshinskii, Pitaevskii theory for the theoretical investigation of the thermodynamical properties of the plane, spherical and cylindrical interfaces and layers. In accordance with this theory the thermodynamical properties of the surface are determined by the fluctuating electromagnetic field. This field may be characterized by the averaged quadratic combinations of the electric and magnetic strength which are thermodynamical Green functions of this field. We have obtained these Green functions for the spher

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Castrignanò, A., R. Quarto, A. Venezia, and G. Buttafuoco. "A geostatistical approach for modelling and combining spatial data with different support." Advances in Animal Biosciences 8, no. 2 (2017): 594–99. http://dx.doi.org/10.1017/s2040470017000048.

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The paper proposes a geostatistical framework to solve the issues of heterogeneous support for spatial estimation. Apparent soil electrical conductivity (ECa) was measured in a field cropped with San Marzano tomato using a multiple frequency electromagnetic profiler with 6 operating frequencies. Mixed support kriging was used to estimate ECa taking into account the change of support. The method includes punctual kriging with the error being the dispersion variance associated with each frequency. The individual ECa maps were weighted by the dispersion variance to obtain a map which was used for

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22

Khan, Zehra, Tarun Sharma, Naiyara Khan, and Adil Ahmad Magray. "Soil exploration using ground penetrating radar." IOP Conference Series: Earth and Environmental Science 889, no. 1 (2021): 012009. http://dx.doi.org/10.1088/1755-1315/889/1/012009.

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Abstract Geophysical methods are extensively utilized in the field of geology and in geotechnical engineering such as seismic, gravitational, magnetic and electromagnetic fields. These methods are used to locate or to understand conditions below the ground surface, and the physical properties of subsurface. GPR also known as Radio Detecting and Ranging is based on the electromagnetic waves. It is a specially designed radar unit for transmitting electromagnetic pulses below the ground instead of air. In GPR the medium is soil which is heterogeneous and has higher attenuation rate than air. This

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Boris, Demianchuk, Guliiev Shota, Ugol'nikov Alexander, Kliat Yurii, and Kosenko Artem. "Development of microwave technology of selective heating the components of heterogeneous media." Eastern-European Journal of Enterprise Technologies 1, no. 5 (115) (2022): 43–52. https://doi.org/10.15587/1729-4061.2022.253329.

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The relevance of solving the technological problem of guaranteed inactivation of microflora by heating in liquid media and the preservation of their useful components, in particular, in wine materials, is substantiated. Traditional heat treatment with heating up to 70...75 °C leads to a deterioration in the properties of the medium due to the thermal decomposition of its useful components. Newer is the technology of heating by the energy of the microwave field in the working chamber. But its significant drawback is the formation of standing waves in the metal chamber, causing local zo

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Ren, Zhengyong, Thomas Kalscheuer, Stewart Greenhalgh, and Hansruedi Maurer. "A finite-element-based domain-decomposition approach for plane wave 3D electromagnetic modeling." GEOPHYSICS 79, no. 6 (2014): E255—E268. http://dx.doi.org/10.1190/geo2013-0376.1.

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We developed a novel parallel domain-decomposition approach for 3D large-scale electromagnetic induction modeling in the earth. We used the edge-based finite-element method and unstructured meshes. Unstructured meshes were divided into sets of nonoverlapping subdomains. We used the curl-curl electric field equation to carry out the analysis. In each subdomain, the electric field was discretized by first-order vector shape functions along the edges of tetrahedral elements. The tangential components of the magnetic field on the interfaces of the subdomains were defined as a set of Lagrange multi

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Valentyn, Glyva, Barabash Oleg, Kasatkina Natalia, et al. "STUDYING THE SHIELDING OF AN ELECTROMAGNETIC FIELD BY A TEXTILE MATERIAL CONTAINING FERROMAGNETIC NANOSTRUCTURES." Eastern-European Journal of Enterprise Technologies 1, no. 10 (103) (2020): 26–31. https://doi.org/10.15587/1729-4061.2020.195232.

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The technology has been proposed for manufacturing a textile material that contains ferromagnetic nanoparticles for shielding electromagnetic fields. It has been shown that the most effective method of sticking together between nano-particles and the fibers of the textile material is the application of magnetic liquid with nanoparticles on the material and its exposure in a heterogeneous permanent magnetic field. Under the condition of a magnetic field intensity of 450 A/m and the exposure to it for 12 hours, the implantation of the nanoparticles into the linen fabric becomes almost

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Muradova, Peri. "Effect of Microwave Radiation on the Development of a Porous Aluminum Carrier of the Active Mass of Catalysts in Heterogeneous Catalytic Reactions." Catalysis Research 02, no. 03 (2022): 1–13. http://dx.doi.org/10.21926/cr.2203030.

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In this study, we prepared a fine-grained, aluminum-reinforced alumina support matrix of the active mass of catalysts, which showed activity in heterogeneous catalytic reactions stimulated by electromagnetic radiation in the microwave range. The support absorbed microwave radiation of 2.45 GHz. We compared the textural characteristics of samples of Аl/Аl<sub>2</sub>О<sub>3 </sub>supports obtained by conventional heat treatment to those synthesized by heat treatment in a microwave field. We found several advantages of heat treating potential supports of the active mass b

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Pryshchenko, O. A., V. A. Plakhtii, F. G. Fomin, and Y. S. Khodachok. "Location of objects in a heterogeneous soil using pulse georadar and artificial neural networks." Visnyk of V.N. Karazin Kharkiv National University, series “Radio Physics and Electronics”, no. 37 (December 30, 2022): 73–85. https://doi.org/10.26565/2311-0872-2022-37-06.

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Background: Detection of hidden objects in the soil layer is a problem that is important in construction, archeology, humanitarian demining, non-destructive testing of road surfaces, flaw detection etc. Studying the peculiarities of electromagnetic filed behavior in heterogeneous media provides a possibility to create subsurface survey systems that can work effectively in real conditions. Objectives: To recognize an object hidden in a heterogeneous medium using ultrawideband ground penetrating radar (GPR) and artificial neural network (ANN), to evaluate the performance of a neural network that

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Krylov, V. P. "Modelling of electromagnetic properties of multicomponent material." Industrial laboratory. Diagnostics of materials 84, no. 7 (2018): 38–41. http://dx.doi.org/10.26896/1028-6861-2018-84-7-38-41.

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Current theories of heterogeneous media consider non-uniform materials as natural and artificially synthesizable structures. Nowadays, synthesis of the non-uniform multicomponent materials with given electrodynamic properties and characterized by magnetic and dielectric permeability, is gaining increasing development. When modeling a multicomponent structure as a uniform material with effective dielectric permeability (ignoring the magnetic properties) using the developed models for the components with known dielectric permeability, the errors arise in calculation of the transmission coefficie

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Celaya-Echarri, Mikel, Leyre Azpilicueta, Fidel Alejandro Rodríguez-Corbo, et al. "Towards Environmental RF-EMF Assessment of mmWave High-Node Density Complex Heterogeneous Environments." Sensors 21, no. 24 (2021): 8419. http://dx.doi.org/10.3390/s21248419.

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The densification of multiple wireless communication systems that coexist nowadays, as well as the 5G new generation cellular systems advent towards the millimeter wave (mmWave) frequency range, give rise to complex context-aware scenarios with high-node density heterogeneous networks. In this work, a radiofrequency electromagnetic field (RF-EMF) exposure assessment from an empirical and modeling approach for a large, complex indoor setting with high node density and traffic is presented. For that purpose, an intensive and comprehensive in-depth RF-EMF E-field characterization study is provide

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Muradova, P. A. "Research on liquid-phase catalytic thermolysis of high-viscosity oil samples being stimulated by microwave radiation in dynamic mode (in the order of discussion)." Azerbaijan Oil Industry, no. 11 (November 15, 2023): 48–56. http://dx.doi.org/10.37474/0365-8554/2023-11-48-56.

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A significant part of Azerbaijan’s oil reserves are fields of high high-viscosity oil, being at younger stage of development, in conditions of low permeable reservoirs. Technogenic complications arising from the exploitation of such fields, create new requirements for oil production technologies, capable to increase the oil recovery of the already existing layers. This paper presents the results of a study of liquid-phase catalytic thermolysis stimulated by microwave radiation of samples of high-viscosity oil from the Balakhani-Sabunchu-Ramany (VI and XI horizons) and Kyurovdag fields, charact

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Arutyunov, S. Yu, I. N. Dorokhov, V. V. Kafarov, V. G. Korniichuk, and V. P. Solov'ev. "Application of methods of the mechanics of heterogeneous media to describe dispersion processes in an electromagnetic field." Journal of Applied Mechanics and Technical Physics 29, no. 4 (1989): 583–87. http://dx.doi.org/10.1007/bf00852501.

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Yoon, Eui Pak, Jung Pyung Choi, Yu Sik Seo, and Tae Woon Nam. "The Continuous Elimination of Inclusions in Molten Aluminum by Direct and Alternate Electromagnetic Force." Materials Science Forum 539-543 (March 2007): 499–502. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.499.

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In the casting Al alloys, Inclusions are formed by various melt treatment and the some alloying elements have a bad effect on quality of products. Generally, inclusions deteriorate mechanical properties of casting products as well as provide heterogeneous nucleation sites of hydrogen porosity. But the difficulty of removing it is the fact that the inclusions are measured generally small about 20㎛ in the melt. So, in this study, Experiments were carried out on commercial die casting aluminum alloy A383 (JIS: ADC 12). The separation system including a D.C. electric field with steady D.C. magneti

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Xu, Min, Robert Geer, Pavel Kabos, and Thomas Wallis. "High Speed Signal Transmission using Through-Si Vias and Coplanar Waveguides in a 3D IC Test Structure." International Symposium on Microelectronics 2013, no. 1 (2013): 000228–32. http://dx.doi.org/10.4071/isom-2013-tp13.

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High frequency signal transmission through silicon substrates is critical for 3D heterogeneous integration. This paper presented fabrication, testing, and simulation of high-frequency interconnects based on through-silicon vias (TSVs) and coplanar waveguides (CPWs) for stacked 3D integrated circuits (3D ICs). Our simulation results showed that adding ground TSVs can improve signal transmission by 6× at 50GHz. We further investigated signal/ground TSV (1SXG) configurations for high-bandwidth signal transmission links. Scattering parameter measurements of fabricated 1SXG TSV structures for frequ

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Zhang, Yang, Ben-Gao Yang, Jing Xie, Rui-Feng Tang, Yan-Bo Bai, and Ming-Zhong Gao. "Study on heating characteristics of granites with different sizes in microwave field." Thermal Science 28, no. 4 Part B (2024): 3511–16. http://dx.doi.org/10.2298/tsci2404511z.

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Studying the heating characteristics of rocks in a microwave field is fundamental to exploring the mechanism of microwave rock breaking. Therefore, a heterogeneous granite model was established using COMSOL Multiphysics to deeply analyze the specific influence of rock size on rock heating characteristics in a microwave field. The results show that with the increase of rock size, the heating rate of rock exhibits a fluctuation characteristic. This phenomenon occurs because changes in rock size leads to variations in both the magnitude and spatial arrangement of electric field intensity. Further

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Orel, V. E., P. P. Loshitskiy, YU A. Kuratov, et al. "Study of the influence of the magnetosensitive complex and heterogeneous electromagnetic field on the nonlinear dynamics of tumor growth and survival of animals with Geren's carcinoma." Electronics and Communications 15, no. 3 (2010): 126–30. https://doi.org/10.20535/2312-1807.2010.15.3.306485.

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Intravenous introduction of mechanochemically synthesized magnetosensitive complex on the basis of nanoparticles of Fe3O4, KCl and antitumor drug - doxorubicin and next irradiation by local spatially inhomogeneous electromagnetic field and mild hyperthermia of Guerin carcinoma increased on 56% survival of animals as compared to experiments when treatment by conventional doxorubicin only

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Anzulevich, Anton P., Leonid N. Butko, Dmitry A. Pavlov, et al. "Effective electrodynamical parameters and microwave heating of radially heterogeneous pellets containing EAF dust and biochar." Journal of Physics: Conference Series 2015, no. 1 (2021): 012007. http://dx.doi.org/10.1088/1742-6596/2015/1/012007.

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Abstract In this work, we investigated the effect of microwave radiation with radially heterogeneous pellets consisting of electric arc furnace (EAF) dust and biochar. We reviewed the possible content of EAF dust in terms of permittivity and permeability of its components and calculated effective permittivity and permeability of EAF dust by an effective medium approach. Using obtained values we calculated dependencies of effective permittivity and permeability of EAF dust - biochar composite mixture on the volume fraction of EAF dust and conductivity of biochar. Taking into account these depen

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Slavich, PG. "Determining ECa-depth profiles from electromagnetic induction measurements." Soil Research 28, no. 3 (1990): 443. http://dx.doi.org/10.1071/sr9900443.

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The response of the EM-38 instrument to a wide range of simulated apparent electrical conductivity (ECa) profiles of different shape and mean ECa was modelled using depth response functions derived for uniform ECa profiles. Relationships between the calculated EM-38 readings and average profile ECa for depths to 1 m were determined using linear regression. These relationships were used to predict ECa profiles measured in the field using a 4-electrode probe. The mean profile ECa of the simulated profiles was strongly correlated with simple linear combinations of the calculated vertical (EM,) an

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Gómez‐Treviño, Enrique, Francisco J. Esparza, and Sóstenes Méndez‐Delgado. "New theoretical and practical aspects of electromagnetic soundings at low induction numbers." GEOPHYSICS 67, no. 5 (2002): 1441–51. http://dx.doi.org/10.1190/1.1512744.

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This paper presents a theoretical yet practical study of electromagnetic (EM) soundings at low induction numbers for vertical and horizontal magnetic dipoles. The physical model is a heterogeneous half‐space with arbitrary vertical conductivity variations. The study comprises a novel approach for solving forward problems, analytical formulas for inversion, and a practical algorithm for recovering conductivity variations from field measurements. The basis of the theoretical approach is a series representation of the EM field in terms of ascending powers of frequency. At low induction numbers on

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Zlobina, I. V., and N. V. Bekrenev. "The Influence of Electromagnatic Field Microwave on Physical and Mechanical Characteristics of CFRP (Carbon Fiber Reinforced Polymer) Structural." Materials Science Forum 870 (September 2016): 101–6. http://dx.doi.org/10.4028/www.scientific.net/msf.870.101.

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Based on the analysis of the development trends of modern transport equipment the prospect of structural composite materials usage, for example CFRP structural, is shown. In this regard, the expediency of conducting research to improve the strength characteristics of these materials is established. It is shown that, despite the large amount of scientific publications on the application of electro-technological methods and microwave technologies for modification of composite materials, applied to heterogeneous materials, such as carbon fiber, in Russia and abroad there are still some unsolved t

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Hu, Feiyue, Fan Zhang, Xiaohan Wang, et al. "Ultrabroad band microwave absorption from hierarchical MoO3/TiO2/Mo2TiC2Tx hybrids via annealing treatment." Journal of Advanced Ceramics 11, no. 9 (2022): 1466–78. http://dx.doi.org/10.1007/s40145-022-0624-0.

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AbstractTwo-dimensional (2D) transition metal carbide MXene-based materials hold great potentials applied for new electromagnetic wave (EMW) absorbers. However, the application of MXenes in the field of electromagnetic wave absorption (EMA) is limited by the disadvantages of poor impedance matching, single loss mechanism, and easy oxidation. In this work, MoO3/TiO2/Mo2TiC2Tx hybrids were prepared by the annealing-treated Mo2TiC2Tx MXene and uniform MoO3 and TiO2 oxides in-situ grew on Mo2TiC2Tx layers. At the annealing temperature of 300 °C, the minimum reflection loss (RLmin) value of MoO3/Ti

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Mazmanishvili, Oleksandr, and Ganna Sydorenko. "SIMULATION OF THE PROPAGATION OF A PLANE ELECTROMAGNETIC WAVE IN AN INHOMOGENEOUS NONABSORBING MEDIUM." Bulletin of National Technical University "KhPI". Series: System Analysis, Control and Information Technologies, no. 2 (10) (December 19, 2023): 55–59. http://dx.doi.org/10.20998/2079-0023.2023.02.08.

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Analytical solutions of the Ishimaru's parabolic equation for the coherence function of the electromagnetic field, which describe the temporal properties of the pulse at the output of a heterogeneous non-dissipative medium, are considered. A generalization of the approach used in the Ishimaru model to describe the time evolution of a monochromatic electromagnetic pulse enveloping in homogeneous non-dissipative media is obtained for the case of non-homogeneous non-dissipative media. Thus, an attempt was made to take into account the influence of the heterogeneity of the medium on the shape of t

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Lin, Jiazhe, Rui Xu, and Xiaohong Tian. "Spatiotemporal Dynamics in Reaction–Diffusion Neural Networks Near a Turing–Hopf Bifurcation Point." International Journal of Bifurcation and Chaos 29, no. 11 (2019): 1950154. http://dx.doi.org/10.1142/s0218127419501542.

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Since the electromagnetic field of neural networks is heterogeneous, the diffusion phenomenon of electrons exists inevitably. In this paper, we investigate the existence of Turing–Hopf bifurcation in a reaction–diffusion neural network. By the normal form theory for partial differential equations, we calculate the normal form on the center manifold associated with codimension-two Turing–Hopf bifurcation, which helps us understand and classify the spatiotemporal dynamics close to the Turing–Hopf bifurcation point. Numerical simulations show that the spatiotemporal dynamics in the neighborhood o

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Kanwal, Samra, Chun Yun Kee, Samuel Y. W. Low, Muhammad Zubair, and L. K. Ang. "Capacitance for fractal-like disordered dielectric slab." Journal of Applied Physics 132, no. 2 (2022): 024104. http://dx.doi.org/10.1063/5.0100159.

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In this paper, we model a heterogeneous dielectric medium exhibiting fractal geometry or disordered random structures by applying non-integer dimensions to determine its capacitance between two parallel plates. The capacitance depends on the fractional dimensions of the fractal or disordered dielectric slab, which may be obtained from the theoretical fractal dimension or box-counting method. The findings are verified by CST Studio Suite (Electromagnetic field simulation software), experimental measurements, and the equivalent capacitance method. Five common types of fractals (Cantor bars/plate

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Kudryashova’, Tatiana, Sergey Polyakov, and Nikita Tarasov. "A novel parallel algorithm for 3D modelling electromagnetic purification of water." MATEC Web of Conferences 210 (2018): 04027. http://dx.doi.org/10.1051/matecconf/201821004027.

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The computational fluid dynamic research in this work has focused on the problem of full-scale three-dimensional modelling water purification processes by the electromagnetic method. Presently, this method of purification was used in the final stage of processing for the production of ultrapure water. In spite of many field experiments, detailed data on such processes can be obtained only by the mathematical modelling. This way allows us to take into account many aspects, for example: real three-dimensional geometry, physical structure of the purification system, heterogeneous composition of t

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Aralkin, Mikhail V., Andrei N. Dement’ev, and Oleg V. Osipov. "Research of electromagnetic characteristics of planar chiral metastructures based on composite helices components taking into account the heterogeneous Bruggeman model." Physics of Wave Processes and Radio Systems 23, no. 3 (2020): 44–55. http://dx.doi.org/10.18469/1810-3189.2020.23.3.44-55.

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In this work a mathematical model of a chiral metamaterial is constructed which based on composite fine-wire helices components, which takes into account the properties of chirality, heterogeneity and dispersion. When constructing the model the chiral metamaterial was considered as a heterogeneous system and described by the Bruggeman model. Inthis work, analytical relationships were obtained for calculating the resonance frequencies of composite helices components. Thedispersion properties of the metamaterial were described using the well-known Condon model. As an example of using the constru

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Yan, Shu Qing, Jing Pei Xie, Wen Yan Wang, and Ji Wen Li. "Microstructure and Tensile Property of Zn-Al Alloy Reinforced with Titanium Produced by Electrolysis." Advanced Materials Research 79-82 (August 2009): 1415–18. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.1415.

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In this study, some low-titanium aluminum alloys produced by electrolysis were prepared and the effect of various titanium contents on microstructure and tensile property of Zn-Al alloy was investigated. The test results showed that addition of titanium by electrolysis is an effective way to refine the grain size of Zn-Al alloy. As the titanium content is 0.04 wt%, the grain size becomes to be a minimum value and the tensile property of the alloy reaches to the maximum. Electrolysis showed that titanium atoms are to be some inherent particles in low-titanium aluminum alloy. These titanium atom

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Neubauer, Georg, Patrick Preiner, Stefan Cecil, Niki Mitrevski, Johannes Gonter, and Heinrich Garn. "The relation between the specific absorption rate and electromagnetic field intensity for heterogeneous exposure conditions at mobile communications frequencies." Bioelectromagnetics 30, no. 8 (2009): 651–62. http://dx.doi.org/10.1002/bem.20519.

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Kasatkina, N. Yu, I. V. Badretdinova, A. A. Litvinyuk, and V. V. Kasatkin. "Substantiation of technological parameters for the production of flax pulp by alkaline cooking in the microwave field." IOP Conference Series: Earth and Environmental Science 949, no. 1 (2022): 012111. http://dx.doi.org/10.1088/1755-1315/949/1/012111.

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Abstract Flax fiber is the most valuable, rapidly renewable source of cellulose. To isolate cellulose from the fiber, it is necessary to get rid of its non-cellulose components: lignin, pectin substances, waxes and hemicellulose. These substances can be removed by cooking flax fiber in an alkaline solution. To intensify the process of destruction of the non-cellulose complex, it is proposed to use the energy of the electromagnetic field of ultrahigh frequencies. The article presents the results of theoretical and experimental studies aimed at establishing the dielectric characteristics of the

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Uvarova, Lyudmila A., Irina V. Krivenko, Marina A. Smirnova, and Alexey B. Nadykto. "Electromagnetic Radiation and Heat Transfer in Disperse Systems Consisting of Spherical and Cylindrical Particles." EPJ Web of Conferences 224 (2019): 02008. http://dx.doi.org/10.1051/epjconf/201922402008.

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The article deals with the electromagnetic radiation transfer in systems of spherical disperse particles with different optical characteristics. A model of the electromagnetic radiation transfer in cylindrical particles containing a small volume of different chemical substance is developed. The substance differs substantially from that of the particle in a radiation absorption coefficient for the wavelength under study in the long wave approximation. The finite element method is used to calculate the temperature field for the system of spherical particles in a two-dimensional approximation. Th

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Glinskikh, Viacheslav, Oleg Nechaev, Igor Mikhaylov, Kirill Danilovskiy, and Vladimir Olenchenko. "Pulsed Electromagnetic Cross-Well Exploration for Monitoring Permafrost and Examining the Processes of Its Geocryological Changes." Geosciences 11, no. 2 (2021): 60. http://dx.doi.org/10.3390/geosciences11020060.

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This paper is dedicated to the topical problem of examining permafrost’s state and the processes of its geocryological changes by means of geophysical methods. To monitor the cryolithozone, we proposed and scientifically substantiated a new technique of pulsed electromagnetic cross-well sounding. Based on the vector finite-element method, we created a mathematical model of the cross-well sounding process with a pulsed source in a three-dimensional spatially heterogeneous medium. A high-performance parallel computing algorithm was developed and verified. Through realistic geoelectric models of

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