Relaxation spectra using nonlinear Tikhonov regularization with a Bayesian criterion
Relaxation spectra using nonlinear Tikhonov regularization with a Bayesian criterion
复制标题
使用非线性吉洪诺夫正则化和贝叶斯准则的弛豫谱
DOI:
10.1007/s00397-020-01212-w
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发表时间:
2020
期刊:
影响因子:
2.3
通讯作者:
Shanbhag, Sachin
中科院分区:
文献类型:
--
作者:
Shanbhag, Sachin
Nonlinear Tikhonov regularization within a Bayesian framework is incorporated into a computer program called pyReSpect, which infers the continuous and discrete relaxation spectra from oscillatory shear experiments. It uses Bayesian inference to provide uncertainty estimates for the continuous spectrumh(τ) by propagating the uncertainty in the regularization parameterλ. The new algorithm is about 6–9 times faster than an older version of the program (ReSpect) in which the optimalλwas determined by the L-curve method. About half of the speedup arises from the Bayesian formulation by restricting the window ofλexplored. The other half arises from the nonlinear formulation for which the spectrum is a weak function ofλ, allowing us to use a coarse mesh forλ. The program is tested and validated on three examples: a synthetic spectrum, a H-polymer, and an elastomer with a nonzero terminal plateau.
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DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
S. Goyal;R. Larson;C. Aloisio
通讯作者:
C. Aloisio
影响因子:
6.3
作者:
J. Weese
通讯作者:
J. Weese
影响因子:
3.1
作者:
H. Winter
通讯作者:
H. Winter
影响因子:
2.1
作者:
J. Macdonald
通讯作者:
J. Macdonald
影响因子:
3.1
作者:
BAUMGAERTEL, M;WINTER, HH
通讯作者:
WINTER, HH