Results 31 to 40 of about 846,274 (324)

Greenhouse gas observation network design for Africa

open access: yesTellus: Series B, Chemical and Physical Meteorology, 2020
An optimal network design was carried out to prioritise the installation or refurbishment of greenhouse gas (GHG) monitoring stations around Africa. The network was optimised to reduce the uncertainty in emissions across three of the most important GHGs:
Alecia Nickless   +11 more
doaj   +1 more source

Assessing urban methane emissions using column-observing portable Fourier transform infrared (FTIR) spectrometers and a novel Bayesian inversion framework

open access: yesAtmospheric Chemistry and Physics, 2021
. Cities represent a large and concentrated portion of global greenhouse gas emissions, including methane. Quantifying methane emissions from urban areas is difficult, and inventories made using bottom-up accounting methods often differ greatly from top ...
T. Jones   +14 more
semanticscholar   +1 more source

Comparison of deterministic and stochastic approaches to crosshole seismic travel-time inversions

open access: yesEarth and Planetary Physics, 2019
The Bayesian inversion method is a stochastic approach based on the Bayesian theory. With the development of sampling algorithms and computer technologies, the Bayesian inversion method has been widely used in geophysical inversion problems.
YanZhe Zhao, YanBin Wang
doaj   +1 more source

Hierarchical Bayesian level set inversion [PDF]

open access: yesStatistics and Computing, 2016
The level set approach has proven widely successful in the study of inverse problems for interfaces, since its systematic development in the 1990s. Recently it has been employed in the context of Bayesian inversion, allowing for the quantification of uncertainty within the reconstruction of interfaces. However the Bayesian approach is very sensitive to
Matthew M. Dunlop   +2 more
openaire   +7 more sources

Ultrasonic Defect Characterization Using the Scattering Matrix: A Performance Comparison Study of Bayesian Inversion and Machine Learning Schemas

open access: yesIEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2021
Accurate defect characterization is desirable in the ultrasonic nondestructive evaluation as it can provide quantitative information about the defect type and geometry.
L. Bai   +5 more
semanticscholar   +1 more source

On Bayesian scatterometer wind inversion [PDF]

open access: yesIEEE Transactions on Geoscience and Remote Sensing, 2006
In a quest for a generic unbiased scatterometer wind inversion method, the different inversion procedures currently in use are revisited in this paper. A careful examination of both the errors in the wind and in the measurement domain, combined with the nonlinear shape of the geophysical model function (GMF), leads to a generic and novel Bayesian wind ...
Stoffelen, Ad, Portabella, Marcos
openaire   +2 more sources

Inference of internal stress in a cell monolayer [PDF]

open access: yes, 2016
We combine traction force data with Bayesian inversion to obtain an absolute estimate of the internal stress field of a cell monolayer. The method, Bayesian inversion stress microscopy (BISM), is validated using numerical simulations performed in a wide ...
Ishihara, S.   +5 more
core   +3 more sources

Bayesian Inversion of Multi‐Gaussian Log‐Conductivity Fields With Uncertain Hyperparameters: An Extension of Preconditioned Crank‐Nicolson Markov Chain Monte Carlo With Parallel Tempering

open access: yes, 2021
In conventional Bayesian geostatistical inversion, specific values of hyperparameters characterizing the prior distribution of random fields are required. However, these hyperparameters are typically very uncertain in practice.
Sinan Xiao   +4 more
semanticscholar   +1 more source

Bayesian seismic multi-scale inversion in complex Laplace mixed domains

open access: yesPetroleum Science, 2017
Seismic inversion performed in the time or frequency domain cannot always recover the long-wavelength background of subsurface parameters due to the lack of low-frequency seismic records.
Kun Li, Xing-Yao Yin, Zhao-Yun Zong
doaj   +1 more source

Fast Markov chain Monte Carlo sampling for sparse Bayesian inference in high-dimensional inverse problems using L1-type priors [PDF]

open access: yes, 2012
Sparsity has become a key concept for solving of high-dimensional inverse problems using variational regularization techniques. Recently, using similar sparsity-constraints in the Bayesian framework for inverse problems by encoding them in the prior ...
Lucka, Felix
core   +1 more source

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