Results 221 to 230 of about 114,108 (264)
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Modelling coronal magnetic fields
Solar Physics, 1981The ‘hairy ball’ model of coronal magnetic fields has a spherical source surface separating potential and radial magnetic fields. In the present model the source surface is chosen such that the wind speed equals the Alfvenic speed at selected points on the source surface. Results have been obtained for a dipole base field and an isothermal corona.
D. P. Rowse, I. W. Roxburgh
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Mechanisms and Machine Science, 2011
The magnetic field modeling of the PM-pole rotor is presented. According to the magnetic characteristics of the three regions of the rotor space, Laplace’s equations of magnetic scalar potential are derived. By using the boundary conditions in between neighboring regions as well as the spherical harmonic expansion of radial component of the residual ...
Liang Yan, I-Ming Chen, Kok-Meng Lee
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The magnetic field modeling of the PM-pole rotor is presented. According to the magnetic characteristics of the three regions of the rotor space, Laplace’s equations of magnetic scalar potential are derived. By using the boundary conditions in between neighboring regions as well as the spherical harmonic expansion of radial component of the residual ...
Liang Yan, I-Ming Chen, Kok-Meng Lee
exaly +2 more sources
A hybrid magnetic field model for axisymmetric magnets
2013 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 2013A hybrid model, synergistically fusing the accuracy of artificial neutral networks (ANNs) and the efficiency of the single magnetic dipole (MD) model, is presented to characterize the magnetic field of axisymmetric cylindrical permanent magnets. While the MD model is widely used due to its simplicity, its efficacy reduces dramatically near the source ...
Faye Wu, Dan D. Frey, Shaohui Foong
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A CRITICAL ISING MODEL IN A MAGNETIC FIELD
International Journal of Modern Physics B, 1993Generalising ideas developed by Owczarek and Baxter and by Pasquier, we establish an equivalence between restricted solid-on-solid models and loop models. Application to the O (n) model leads to a new family of solvable A-D-E models. For the models related to the classical A L algebra we present an off-critical extension and show that the A 3 model ...
WARNAAR, SO, NIENHUIS, B, SEATON, KA
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Magnetic Field Data Correction in Space for Modelling the Lithospheric Magnetic Field
Space Science Reviews, 2016The Earth’s magnetic field as it is measured by low-Earth orbit satellites such as Swarm and CHAMP results from the superposition of internal and external source fields overlapping in time and in space. The Earth’s lithospheric field is one of the weakest sources detectable from space and its accurate description requires treatments of rapidly-varying ...
Thébault, Erwan +3 more
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Magnetic dipole model in the near-field
2015 IEEE International Conference on Information and Automation, 2015Magnetic dipole model is significant to calculate the magnetic strength of the magnet source. However, a restriction is that the distance from the testing position to the magnet's position must be much farther than the size of the magnet. The magnetic dipole model is not suitable for the near-filed around the magnet.
Yupeng Ren +3 more
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String Cosmological Models with Magnetic Field
General Relativity and Gravitation, 1999A new class of string cosmological models with and without magnetic field in the context of a spacetime with \(G_3\) symmetry has been presented. In order to study the effects of magnetic field, the standard energy-momentum tensor is modified by incorporating an additional term due to a magnetic field.
Singh, G. P., Singh, Triloki
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