Using Linear and Nonlinear Inversion Algorithm Combined with Simple Dislocation Model Inversion of Coal Mine Subsidence Mechanism

Author(s):  
YuFeng ZHUQinWei WUTieDing Lu ◽  
Yan Luo
2019 ◽  
Vol 34 (4) ◽  
pp. 867
Author(s):  
Jia-ming LI ◽  
Jian-hui YU ◽  
Wen-zhong ZHANG

Author(s):  
James A. Jessop ◽  
Calvin L. Cumerlato ◽  
Kevin M. O‘Connor ◽  
John A. Siekmeier

2019 ◽  
Vol 42 (7) ◽  
pp. 1991-2005
Author(s):  
Mengjie Zhang ◽  
Xingzhong Yuan ◽  
Dongjie Guan ◽  
Hong Liu ◽  
Kuo Sun ◽  
...  

1989 ◽  
Vol 18 (3) ◽  
pp. 265-267 ◽  
Author(s):  
R. G. Darmody ◽  
I. J. Jansen ◽  
S.G. Carmer ◽  
J.S. Steiner

Geophysics ◽  
2002 ◽  
Vol 67 (2) ◽  
pp. 438-447 ◽  
Author(s):  
Niels Bøie Christensen

This paper presents a fast approximate 1-D inversion algorithm for transient electromagnetic (EM) data that can be applied for all measuring configurationsand transmitter waveforms and for all field components. The inversion is based on an approximate forward mapping in the adaptive Born approximation. The generality is obtained through a separation of the forward problem into a configuration-independent part, mapping layer conductivities into apparent conductivity, and a configuration-dependent part, the half-space step response. The EM response from any waveform can then be found by a convolution with the time derivative of the waveform. The approach does not involve inherently unstable deconvolution computations or nonunique transformations, and it is about 100 times faster than ordinary nonlinear inversion. Nonlinear model responses of the models obtained through the approximate inversion fit the data typically within 5%.


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