Results 31 to 40 of about 7,623 (154)

The Gravity Force Generated by a Non-Rotating Level Ellipsoid of Revolution with Low Eccentricity as a Series of Spherical Harmonics

open access: yesMathematics, 2023
The gravity force of a gravity field generated by a non-rotating level ellipsoid of revolution enclosing mass M is given as a solution of a partial differential equation along with a boundary condition of Dirichlet type. The partial differential equation
Gerassimos Manoussakis
doaj   +1 more source

A G-Modified Helmholtz Equation with New Expansions for the Earth’s Disturbing Gravitational Potential, Its Functionals and the Study of Isogravitational Surfaces

open access: yesAppliedMath
The G-modified Helmholtz equation is a partial differential equation that enables us to express gravity intensity g as a series of spherical harmonics having radial distance r in irrational powers.
Gerassimos Manoussakis
doaj   +1 more source

Spherical Harmonics Ylm(θ,ϕ): Positive and Negative Integer Representations of su(1,1) for l-m and l+m

open access: yesAdvances in High Energy Physics, 2016
The azimuthal and magnetic quantum numbers of spherical harmonics Ylm(θ,ϕ) describe quantization corresponding to the magnitude and z-component of angular momentum operator in the framework of realization of su(2) Lie algebra symmetry.
H. Fakhri
doaj   +1 more source

The sand grain and the butterfly. Instability in geodesy and geophysics

open access: yesAnnals of Geophysics, 1997
The problems of convergence of series in celestial mechanics and of certain series in geodesy (Molodensky's series and spherical harmonics) show similar features, involving a curious instability. This is imaginatively expressed as the « butterfly effect»
H. Moritz
doaj   +1 more source

4. On Spherical Harmonics

open access: yesProceedings of the Royal Society of Edinburgh, 1880
n ...
openaire   +2 more sources

High-Order Harmonics Generation Using Spherical and Non-Spherical Nanoparticles

open access: yesNanomaterials
The conversion efficiency of 800 nm, 65 fs radiation toward high-order harmonic generation (HHG) in laser-induced plasmas containing spherical and non-spherical nanoparticles (NPs) produced during the laser ablation of different metals in water using ...
Rashid A. Ganeev, Aigars Atvars
doaj   +1 more source

Failing to Reflect Reality: Gaussian Splatting’s Collapse on Non-Lambertian Surfaces

open access: yesIEEE Open Journal of Signal Processing
We explore the applicability of Gaussian Splatting (GS) to the view synthesis (VS) of non-Lambertian objects. Materials with anisotropic appearance have always been a failure case for VS, until the recent introduction of spherical harmonics promising ...
Eva Dubar   +3 more
doaj   +1 more source

Tensor series expansion of a spherical function for the use in constitutive theory of materials containing orientable particles; pp 73-92 [PDF]

open access: yesProceedings of the Estonian Academy of Sciences, 2018
This paper presents a didactical introduction to a tensor series expansion of a spherical function for the use in constitutive theory of materials containing orientable particles. In several application areas a function of two angles, e.g. an orientation
Heiko Herrmann, Miriam Beddig
doaj   +1 more source

Transformation of Irregular Solid Spherical Harmonics at Parallel Translation of the Coordinate System [PDF]

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2017
When studying physical phenomena in spatial regions bounded by spherical or slightly non-spherical surfaces, spherical functions and solid spherical harmonics are widely used.
A.A. Aganin, A.I. Davletshin
doaj  

Limitations and Performance Analysis of Spherical Sector Harmonics for Sound Field Processing

open access: yesApplied Sciences
Developing spherical sector harmonics (SSHs) benefits sound field decomposition and analysis over spherical sector regions. Although SSHs demonstrate potential in the field of spatial audio, a comprehensive investigation into their properties and ...
Hanwen Bi   +4 more
doaj   +1 more source

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