Results 31 to 40 of about 514,697 (295)

Modeling magnetic fields using Gaussian processes

2013 IEEE International Conference on Acoustics, Speech and Signal Processing, 2013
Starting from the electromagnetic theory, we derive a Bayesian non-parametric model allowing for joint estimation of the magnetic field and the magnetic sources in complex environments. The model is a Gaussian process which exploits the divergence- and curl-free properties of the magnetic field by combining well-known model components in a novel manner.
Wahlström, Niklas, Kok, Manon, Schön, Thomas B., Gustafsson, Fredrik   +3 more
openaire   +3 more sources

Progress in the modeling of Earth and planetary internal magnetic fields

地球与行星物理论评
A majority of the planets in the Solar System are characterized by intrinsic magnetic fields that co-rotate with these celestial bodies. With ongoing advances in human deep-space exploration, magnetic field models have been established for all known ...
Jiawei Gao, Zhaojin Rong, Yong Wei, Yuqi Wang, Yaochen Yue, Zhen Shi, Weidong Gu, Dongquan Wang, Shuaiyu Zhai, Xinzhou Li   +9 more
doaj   +1 more source

Modeling and interpolation of the ambient magnetic field by Gaussian processes

, 2018
Anomalies in the ambient magnetic field can be used as features in indoor positioning and navigation. By using Maxwell's equations, we derive and present a Bayesian non-parametric probabilistic modeling approach for interpolation and extrapolation of the
Kok, Manon, Schön, Thomas B., Solin, Arno, Särkkä, Simo, Wahlström, Niklas   +4 more
core   +1 more source

Characterization of anomalous Zeeman patterns in complex atomic spectra

, 2012
The modeling of complex atomic spectra is a difficult task, due to the huge number of levels and lines involved. In the presence of a magnetic field, the computation becomes even more difficult.
A. G. Shenstone, A. Jucys, A. R. Edmonds, B. R. Judd, D. A. Varshalovich, E. El-Baz, E. El-Baz, E. El-Baz, E. U. Condon, F. Paschen, Franck Gilleron, G. A. Korn, G. Mathys, G. Mathys, H. R. Griem, I. I. Sobelman, Jean-Christophe Pain, M. G. Kendall, P. Zeeman, R. C. Kirkpatrick, R. D. Cowan, R. Karazija, R. Karazija, R. Karazija, W. C. Martin, Y. Bordarier   +25 more
core   +1 more source

LOCAL MAGNETIZATION IN CRITICAL ISING MODEL WITH BOUNDARY MAGNETIC FIELD [PDF]

Modern Physics Letters A, 1994
We describe a simple way to derive spin correlation functions in 2-D Ising model at critical temperature but with nonzero magnetic field at the boundary. Local magnetization (i.e. one-point function) is computed explicitly for half-plane and disk geometries.
Chatterjee, R., Zamolodchikov, A.
openaire   +2 more sources

The extraordinary complex magnetic field of the helium-strong star HD 37776

, 2010
The early-type chemically peculiar stars often show strong magnetic fields on their surfaces. These magnetic topologies are organized on large scales and are believed to be close to an oblique dipole for most of the stars. In a striking exception to this
Adelman, Andreas Lundin, Babel, Babel, Bohlender, Dmitry Kudryavtsev, Donati, Groote, Groote, Hunger, Iosif Romanyuk, Kudryavtsev, Landstreet, Leone, Mathys, Mestel, Oleg Kochukhov, Pedersen, Pedersen, Romanyuk, Townsend, Ud-Doula, Vasilchenko, Zboril   +23 more
core   +1 more source

MAGNETIC FIELD GENERATION IN HIGGS INFLATION MODEL [PDF]

International Journal of Modern Physics A, 2012
We study the generation of magnetic field in Higgs inflation models where the Standard Model Higgs boson has a large coupling to the Ricci scalar. We couple the Higgs field to the electromagnetic fields via a nonrenormalizable dimension six operator suppressed by the Planck scale in the Jordan frame. We show that by choosing the Higgs coupling λ(MZ) =
Das, Moumita, Mohanty, Subhendra
openaire   +2 more sources

Heisenberg necklace model in a magnetic field

Physical Review B, 2016
11 ...
Tsvelik, A. M., Zaliznyak, I. A.
openaire   +3 more sources

Modeling of High-Precision Sea Surface Geomagnetic Field in the Northern South China Sea Based on PSO-BP Neural Network

Journal of Marine Science and Engineering
In existing regional geomagnetic field modeling, the smoothness of basic functions and the insufficient data constraints in marginal regions lead to the omission of detail features and extrapolation oscillations.
Hongjie Chen, Guiqian Wu, Haopeng Chen, Chuang Xu, Chunhong Wu   +4 more
doaj   +1 more source

Shell to shell energy transfer in MHD, Part I: steady state turbulence

, 2005
We investigate the transfer of energy from large scales to small scales in fully developed forced three-dimensional MHD-turbulence by analyzing the results of direct numerical simulations in the absence of an externally imposed uniform magnetic field ...
A. N. Kolmogorov, Alexandros Alexakis, Annick Pouquet, H. K. Moffatt, P. A. Davidson, P. S. Iroshnikov, Pablo D. Mininni, S. Boldyrev   +7 more
core   +1 more source