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A New Coordinate System for Constructing Spherical Grid Systems [PDF]

open access: goldApplied Sciences, 2020
In astronomy, physics, climate modeling, geoscience, planetary science, and many other disciplines, the mass of data often comes from spherical sampling.
Kin Lei, Dongxu Qi, Xiaolin Tian
doaj   +4 more sources

Fault classification in inverter based resources system using spherical coordinate system

open access: golde-Prime: Advances in Electrical Engineering, Electronics and Energy
Modern grid codes require renewable energy source (RES) plants to remain connected with the grid even during fault scenarios. Fault current being comparable to rated full-load output of RES plants, makes timely fault analysis a more challenging task.
Vivek Sahu, Pratim Kundu
doaj   +3 more sources

Spherical Coordinate System for Dyslipoproteinemia Phenotyping and Risk Prediction. [PDF]

open access: goldJ Clin Med
Background/Objectives: The factors contributing to residual atherosclerotic cardiovascular disease (ASCVD) risk in individuals are not fully understood, but knowledge of the specific type of dyslipoproteinemia may help further refine risk assessment.
Cole J, Sampson M, Remaley AT.
europepmc   +3 more sources

Regular coordinate systems for Schwarzschild and other spherical spacetimes [PDF]

open access: greenAmerican Journal of Physics, 2001
The continuation of the Schwarzschild metric across the event horizon is a well-understood problem discussed in most textbooks on general relativity. Among the most popular coordinate systems that are regular at the horizon are the Kruskal–Szekeres and Eddington–Finkelstein coordinates.
Karl Martel, Eric Poisson
core   +6 more sources

Application of spherical coordinate system to facial asymmetry analysis in mandibular prognathism patients. [PDF]

open access: goldImaging Sci Dent, 2011
The purpose of this study was to compare asymmetric mandibular prognathism individuals with symmetric mandibular prognathism individuals using a new alternate spherical coordinate system.This study consisted of 47 computed tomographic images of patients with mandibular prognathism.
Yoon SJ   +5 more
europepmc   +6 more sources

Relativistic Hartree-Bogoliubov theory in coordinate space: Finite element solution for a nuclear system with spherical symmetry [PDF]

open access: green, 1997
A C++ code for the solution of the relativistic Hartree-Bogoliubov theory in coordinate space is presented. The theory describes a nucleus as a relativistic system of baryons and mesons.
W. Po ̈schl, D. Vretenar, P. Ring
openalex   +3 more sources

Physics students’ construction and checking of differential volume elements in an unconventional spherical coordinate system [PDF]

open access: goldPhysical Review Physics Education Research, 2019
In upper-division physics courses, students’ use of differential line, area, and volume elements and their facility with the various multivariable coordinate systems consistently go hand in hand.
Benjamin P. Schermerhorn   +1 more
doaj   +2 more sources

Spherical Coordinate-based Reliability Analysis in a Control System

open access: bronzeInternational Journal of Signal Processing, Image Processing and Pattern Recognition, 2013
It is very important to design a feedback loop which takes the output into consideration so that the system is able to adjust its performance. Reliability analysis in the control system is able to examine the system stability and make the control system is more compatible and reliable.
Xuexuan Zhu
openalex   +2 more sources

Physics students’ construction of differential length vectors in an unconventional spherical coordinate system [PDF]

open access: goldPhysical Review Physics Education Research, 2019
Vector calculus and multivariable coordinate systems play a large role in the understanding and calculation of much of the physics in upper-division electricity and magnetism. Differential vector elements represent one key mathematical piece of students’
Benjamin P. Schermerhorn   +1 more
doaj   +2 more sources

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