Results 21 to 30 of about 262,918 (303)

Accurate Modeling and Control System Design for a Spherical Radial AC HMB for a Flywheel Battery System

open access: yesEnergies, 2023
Different from common cylindrical magnetic bearings, the spherical radial AC HMB has obvious advantages in suppressing the gyroscopic effect, thus it is very suitable for application in flywheel battery systems.
Weiyu Zhang, Zhen Wang
doaj   +1 more source

Conversion calculation method of multivariate integrals

open access: yesAIMS Mathematics, 2021
The new schemes of calculation of double integrals and triple integrals are proposed in this paper. The formulas in which the double integral is converted into a line integral with respect to the arc length, and the triple integral is converted into a ...
Rong-jian Ning, Xiao-yan Liu, Zhi Liu
doaj   +1 more source

A Knowledge Graph Completion Method for Telecom Metadata Based on the Spherical Coordinate System

open access: yesIEEE Access, 2022
In the telecommunications field, the problem of data island is caused by the separation and isolation of data. They are distributed in different systems including the business support system (BSS), management support system (MSS), and operation support ...
Kaicheng Zhang   +5 more
doaj   +1 more source

Surface reconstruction with spherical harmonics and its application for single particle crushing simulations

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2022
Particle morphology has great influence on mechanical behaviour and hydro/thermal/electrical conductivities of granular materials. Surface reconstruction and mesh generation are critical to consider realistic particle shapes in various computational ...
Deheng Wei, Budi Zhao, Yixiang Gan
doaj   +1 more source

Radial Stellar Pulsation and 3D Convection. I. Numerical Methods and Adiabatic Test Cases [PDF]

open access: yes, 2011
We are developing a 3D radiation hydrodynamics code to simulate the interaction of convection and pulsation in classical variable stars. One key goal is the ability to carry these simulations to full amplitude in order to compare them with observed light
Deupree, Robert G., Geroux, Chris M.
core   +2 more sources

Weakly Orthogonal Spherical Harmonics in a Non-Polar Spherical Coordinates and its Application to Functions on Cubed-Sphere

open access: yesSultan Qaboos University Journal for Science, 2012
In a recent paper (Nasir, 2007), a set of weakly orthogonal and completely orthogonal spherical harmonics in a non-polar spherical coordinate system based on a cubed-sphere was constructed. In this work, we explore some linear relations between these two
M.A.A.M. Faham, H.M. Nasir
doaj   +1 more source

HOTINE OBLIQUE MERCATOR MAP PROJECTION IN PROJ4JS LIBRARY [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
The implementation of GIS application using hybrid approach on smartphone should have a coordinate transformation capability from one coordinate system into another.
K. Anshar, N. Suryana, M. F. I. Othman
doaj   +1 more source

Design of centroid deviated spherical rolling robot

open access: yesThe Journal of Engineering, 2019
A spherical robot is a machine with a unique appearance and novel function. The spherical robot function designed in this study is limited to the movement in all directions.
Wenjie Chai, Yibo Zhang, Quan Li
doaj   +1 more source

Magnetization dynamics: path-integral formalism for the stochastic Landau-Lifshitz-Gilbert equation [PDF]

open access: yes, 2014
We construct a path-integral representation of the generating functional for the dissipative dynamics of a classical magnetic moment as described by the stochastic generalization of the Landau-Lifshitz-Gilbert equation proposed by Brown, with the ...
Arenas, Zochil Gonzalez   +4 more
core   +2 more sources

Symmetry without Symmetry: Numerical Simulation of Axisymmetric Systems using Cartesian Grids [PDF]

open access: yes, 1999
We present a new technique for the numerical simulation of axisymmetric systems. This technique avoids the coordinate singularities which often arise when cylindrical or polar-spherical coordinate finite difference grids are used, particularly in ...
Alcubierre M.   +30 more
core   +2 more sources

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