scholarly journals Improved Current Density and Magnetization Reconstruction Through Vector Magnetic Field Measurements

2020 ◽  
Vol 14 (2) ◽  
Author(s):  
D.A. Broadway ◽  
S.E. Lillie ◽  
S.C. Scholten ◽  
D. Rohner ◽  
N. Dontschuk ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Current Density ◽  
Field Measurements ◽  
Vector Magnetic Field ◽  
Magnetic Field Measurements

scholarly journals Fault Identification on a Fuel Cell by 3-D Current Density Reconstruction From External Magnetic Field Measurements

2019 ◽  
Vol 55 (6) ◽  
pp. 1-5 ◽  
Author(s):  
Lyes Ifrek ◽  
Olivier Chadebec ◽  
Sebastien Rosini ◽  
Gilles Cauffet ◽  
Yann Bultel ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fuel Cell ◽  
External Magnetic Field ◽  
Current Density ◽  
Field Measurements ◽  
Fault Identification ◽  
Magnetic Field Measurements

scholarly journals Driving Layer of Solar Activity

2002 ◽  
Vol 12 ◽  
pp. 371-377
Author(s):  
Jingxiu Wang
Keyword(s):  
Magnetic Field ◽  
Solar Activity ◽  
Magnetic Energy ◽  
Field Measurements ◽  
Basic Structure ◽  
The Sun ◽  
Flux Emergence ◽  
Vector Magnetic Field ◽  
Elementary Processes ◽  
Magnetic Field Measurements

AbstractThere should be a driving layer on the Sun, in which the interaction between magnetic field and plasma motion would provide enough magnetic energy and necessary topology for the explosion of solar activity in the corona.Although the exact location of the driving layer is not known, phenomenologically, the photosphere is acting, in many aspects, as the driving layer. Vector magnetic field measurements on the photosphere are greatly needed in clarifying the nature of the driving.Two elementary processes, flux emergence and cancellation, andone basic structure, magnetic interface between topology-independent magnetic loops, are key elements in the driving.

scholarly journals 2D and 3D fault basis for fuel cell diagnosis by external magnetic field measurements

2017 ◽  
Vol 79 (2) ◽  
pp. 20901 ◽  
Author(s):  
Lyes Ifrek ◽  
Gilles Cauffet ◽  
Olivier Chadebec ◽  
Yann Bultel ◽  
Sébastien Rosini ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Inverse Problem ◽  
Fuel Cell ◽  
External Magnetic Field ◽  
Current Density ◽  
Field Measurements ◽  
Magnetic Field Measurements ◽  
Uniqueness Of The Solution ◽  
Ill Posed ◽  
Value Decomposition

An original approach used for the identification of faults in fuel cell stacks is presented. It is based on the 3D reconstruction of the current density from external magnetic field measurements which is an ill-posed magnetostatic linear inverse problem. A suitable and original current density and magnetic field basis are proposed in order to define both local and global faults on a fuel cell stack. The inverse problem is regularized by truncated singular value decomposition (SVD) to ensure the uniqueness of the solution.

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