Results 21 to 30 of about 7,674 (246)

Electromagnetic Scattering by Bianisotropic Spheres

open access: yesApplied Sciences, 2023
Electromagnetic fields in bulk bianisotropic media contain plane waves whose k-vectors can be found using the method of the index of refraction’s operator and belong to the Fresnel wave surfaces that fall into one of the five hyperbolic classes of the ...
Maxim Durach
doaj   +1 more source

Spherical Harmonics for the 1D Radiative Transfer Equation. I. Reflected Light

open access: yesThe Astrophysical Journal, 2023
A significant challenge in radiative transfer theory for atmospheres of exoplanets and brown dwarfs is the derivation of computationally efficient methods that have adequate fidelity to more precise, numerically demanding solutions.
Caoimhe M. Rooney   +2 more
doaj   +1 more source

Improving Decoupled Spherical Harmonics ESPRIT Using Structured Least Squares

open access: yesIEEE Access, 2018
Spherical arrays have been widely used in direction-of-arrival estimation in recent years, and most algorithms in the spherical harmonics domain typically simultaneously obtain the 2-D angles. In this paper, we first use the structured least squares (SLS)
Qinghua Huang, Lin Zhang, Yong Fang
doaj   +1 more source

Modal Projection for Quasi-Homogeneous Anisotropic Turbulence

open access: yesAtmosphere, 2023
This article, or essay, addresses the anisotropic structure and the dynamics of quasi-homogeneous, incompressible turbulence. Modal projection and expansions in terms of spherical harmonics in three-dimensional Fourier space are in line with a seminal ...
Ying Zhu, Claude Cambon
doaj   +1 more source

Monopole vector spherical harmonics [PDF]

open access: yesPhysical Review D, 1994
Eigenfunctions of total angular momentum for a charged vector field interacting with a magnetic monopole are constructed and their properties studied. In general, these eigenfunctions can be obtained by applying vector operators to the monopole spherical harmonics in a manner similar to that often used for the construction of the ordinary vector ...
openaire   +3 more sources

Efficient Representation of Head-Related Transfer Functions With Combination of Spherical Harmonics and Spherical Wavelets

open access: yesIEEE Access, 2019
Recently, a modeling method for head-related transfer functions (HRTFs) in the spatial domain is proposed based on spherical wavelets. Because spherical wavelets are local functions on the sphere, HRTF local features can be efficiently represented by ...
Huaping Liu, Yong Fang, Qinghua Huang
doaj   +1 more source

Incorporation of anisotropic scattering into the method of characteristics

open access: yesNuclear Engineering and Technology, 2022
In this study, we incorporate an anisotropic scattering scheme involving spherical harmonics into the method of characteristics (MOC). The neutron transport solution in a light water reactor can be significantly improved because of the impact of an ...
Anisur Rahman, Deokjung Lee
doaj   +1 more source

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

open access: yesAdvanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora   +4 more
wiley   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

View-Adaptive Gaussian Splatting With Dynamic Spherical Harmonics Modulation for Multi-Scale Urban Scene Rendering

open access: yesIEEE Access
Despite recent advances in large-scale novel view synthesis centered around CityGaussian, performance degradation still occurs under extreme view-scale changes such as transitions between aerial and ground-level viewpoints.
Jiye Kim   +4 more
doaj   +1 more source

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