scholarly journals A regularization operator for source identification for elliptic PDEs

2020 ◽  
Vol 0 (0) ◽  
pp. 1-20
Author(s):  
Ole Løseth Elvetun ◽  
◽  
Bjørn Fredrik Nielsen
Keyword(s):  
Source Identification ◽  
Elliptic Pdes ◽  
Regularization Operator

Acoustic noise-source identification in aircraft-based atmospheric temperature measurements

1999 ◽  
Author(s):  
Ronald Hugo ◽  
Scott Nowlin ◽  
Kim McCrae ◽  
Frank Eaton ◽  
Ila Hahn
Keyword(s):  
Source Identification ◽  
Noise Source ◽  
Acoustic Noise ◽  
Atmospheric Temperature ◽  
Temperature Measurements ◽  
Noise Source Identification

Physics-informed Broadband Noise Source Identification and Prediction of an Ideally Twisted Rotor

2021 ◽  
Author(s):  
Christopher Thurman ◽  
Nikolas S. Zawodny ◽  
Nicole A. Pettingill ◽  
Leonard V. Lopes ◽  
James D. Baeder
Keyword(s):  
Source Identification ◽  
Noise Source ◽  
Broadband Noise ◽  
Noise Source Identification

Comparisons of regularization methods and regularization parameter selection methods in sound source identification using inverse boundary element method

2019 ◽  
Vol 67 (3) ◽  
pp. 219-227
Author(s):  
Youhong Xiao ◽  
Qingqing Song ◽  
Shaowei Li ◽  
Guoxue Lv ◽  
Zhenlin Ji
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Transfer Matrix ◽  
Sound Source ◽  
Source Identification ◽  
Regularization Parameter ◽  
Vibration Velocity ◽  
Regularization Methods ◽  
Inverse Boundary ◽  
Element Method

In noise source identification based on the inverse boundary element method (IBEM), the boundary vibration velocity is predicted based on the field pressure through a transfer matrix of the vibration velocity and field pressure established on the Helmholtz integral equation. Because the matrix is often ill-posed, it needs to be regularized before reconstructing the vibration velocity. Two regularization methods and two methods of selecting the regularization parameter are investigated through the simulation analysis of a pulsating sphere. The result of transfer matrix regularization is further verified through the reconstruction of the vibration of an aluminum plate. Additionally, to reduce the large errors at some frequencies in the reconstruction result, increasing the number of measuring points is more effective than reducing the distance between the measurement plane and the sound source.

Deterministic Methods of Seismic Source Identification

1983 ◽  
Author(s):  
C. B. Archambeau
Keyword(s):  
Source Identification ◽  
Seismic Source ◽  
Deterministic Methods

scholarly journals A robust solver for elliptic PDEs in 3D complex geometries

2021 ◽  
pp. 110511
Author(s):  
Matthew J. Morse ◽  
Abtin Rahimian ◽  
Denis Zorin
Keyword(s):  
Elliptic Pdes ◽  
Complex Geometries

Soil lead distribution characteristics and source identification in Hanyuan, upstream of Yangtze River, China

2021 ◽  
Vol 14 (15) ◽  
Author(s):  
Xiaowen Liu ◽  
Dan Zhou ◽  
Xue Tang ◽  
Ying Li ◽  
Ying Yang ◽  
...  
Keyword(s):  
Source Identification ◽  
Yangtze River ◽  
Distribution Characteristics ◽  
Soil Lead ◽  
Lead Distribution

Two-grid IPDG discretization scheme for nonlinear elliptic PDEs

2020 ◽  
pp. 105587
Author(s):  
Liuqiang Zhong ◽  
Liangliang Zhou ◽  
Chunmei Liu ◽  
Jie Peng
Keyword(s):  
Elliptic Pdes ◽  
Discretization Scheme ◽  
Nonlinear Elliptic
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