| Title:
|
A comparison of deterministic and Bayesian inverse with application in micromechanics (English) |
| Author:
|
Blaheta, Radim |
| Author:
|
Béreš, Michal |
| Author:
|
Domesová, Simona |
| Author:
|
Pan, Pengzhi |
| Language:
|
English |
| Journal:
|
Applications of Mathematics |
| ISSN:
|
0862-7940 (print) |
| ISSN:
|
1572-9109 (online) |
| Volume:
|
63 |
| Issue:
|
6 |
| Year:
|
2018 |
| Pages:
|
665-686 |
| Summary lang:
|
English |
| . |
| Category:
|
math |
| . |
| Summary:
|
The paper deals with formulation and numerical solution of problems of identification of material parameters for continuum mechanics problems in domains with heterogeneous microstructure. Due to a restricted number of measurements of quantities related to physical processes, we assume additional information about the microstructure geometry provided by CT scan or similar analysis. The inverse problems use output least squares cost functionals with values obtained from averages of state problem quantities over parts of the boundary and Tikhonov regularization. To include uncertainties in observed values, Bayesian inversion is also considered in order to obtain a statistical description of unknown material parameters from sampling provided by the Metropolis-Hastings algorithm accelerated by using the stochastic Galerkin method. The connection between Bayesian inversion and Tikhonov regularization and advantages of each approach are also discussed. (English) |
| Keyword:
|
inverse problems |
| Keyword:
|
Bayesian approach |
| Keyword:
|
stochastic Galerkin method |
| MSC:
|
60-08 |
| MSC:
|
65C60 |
| MSC:
|
65N21 |
| MSC:
|
82-08 |
| MSC:
|
86-08 |
| idZBL:
|
Zbl 07031682 |
| idMR:
|
MR3893005 |
| DOI:
|
10.21136/AM.2018.0195-18 |
| . |
| Date available:
|
2019-01-03T09:11:04Z |
| Last updated:
|
2021-01-04 |
| Stable URL:
|
http://hdl.handle.net/10338.dmlcz/147563 |
| . |
| Reference:
|
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