Results 11 to 20 of about 163,323 (140)

Modification of laser correlation spectroscopy method for analyzing polydisperse nanoparticle suspensions

open access: yesSt. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019
The paper proposes a modification of the laser correlation spectroscopy method to improve the accuracy of determining the size of polydisperse nanoparticles in suspensions.
Nepomnyashchaya Elina, Velichko Elena
doaj   +1 more source

Evaluation of Fifteen Algorithms for the Resolution of the Electrocardiography Imaging Inverse Problem Using ex-vivo and in-silico Data

open access: yesFrontiers in Physiology, 2018
The electrocardiographic imaging inverse problem is ill-posed. Regularization has to be applied to stabilize the problem and solve for a realistic solution. Here, we assess different regularization methods for solving the inverse problem.
Amel Karoui   +8 more
doaj   +1 more source

Improved real-time dynamics from imaginary frequency lattice simulations [PDF]

open access: yes, 2017
The computation of real-time properties, such as transport coefficients or bound state spectra of strongly interacting quantum fields in thermal equilibrium is a pressing matter.
Pawlowski, Jan M., Rothkopf, Alexander
core   +2 more sources

Shrunken Locally Linear Embedding for Passive Microwave Retrieval of Precipitation [PDF]

open access: yes, 2014
This paper introduces a new Bayesian approach to the inverse problem of passive microwave rainfall retrieval. The proposed methodology relies on a regularization technique and makes use of two joint dictionaries of coincidental rainfall profiles and ...
Bras, Rafael Luis   +2 more
core   +1 more source

Joint state-parameter estimation of a nonlinear stochastic energy balance model from sparse noisy data [PDF]

open access: yes, 2019
While nonlinear stochastic partial differential equations arise naturally in spatiotemporal modeling, inference for such systems often faces two major challenges: sparse noisy data and ill-posedness of the inverse problem of parameter estimation.
Lu, Fei, Monahan, Adam H., Weitzel, Nils
core   +2 more sources

Development of the VGF Crystal Growth Recipe: Intelligent Solutions of Ill‐Posed Inverse Problems using Images and Numerical Data

open access: yesCrystal research and technology (1981), 2023
Development of the Vertical Growth Freeze crystal growth process is a typical example of solving the ill‐posed inverse problem, which violates one or more of Hadamard's well‐posedness criteria of solution existence, uniqueness, and stability.
N. Dropka   +3 more
semanticscholar   +1 more source

Bayesian inference for inverse problems [PDF]

open access: yes, 2001
Traditionally, the MaxEnt workshops start by a tutorial day. This paper summarizes my talk during 2001'th workshop at John Hopkins University. The main idea in this talk is to show how the Bayesian inference can naturally give us all the necessary tools ...
Mohammad-Djafari, Ali
core   +2 more sources

A Sparsity-Constrained Preconditioned Kaczmarz Reconstruction Method for Fluorescence Molecular Tomography

open access: yesBioMed Research International, 2016
Fluorescence molecular tomography (FMT) is an imaging technique that can localize and quantify fluorescent markers to resolve biological processes at molecular and cellular levels.
Duofang Chen   +3 more
semanticscholar   +1 more source

Proposals which speed-up function-space MCMC

open access: yes, 2013
Inverse problems lend themselves naturally to a Bayesian formulation, in which the quantity of interest is a posterior distribution of state and/or parameters given some uncertain observations.
Law, Kody J. H.
core   +1 more source

Analysis of the Gibbs sampler for hierarchical inverse problems [PDF]

open access: yes, 2014
Many inverse problems arising in applications come from continuum models where the unknown parameter is a field. In practice the unknown field is discretized resulting in a problem in $\mathbb{R}^N$, with an understanding that refining the discretization,
Agapiou, Sergios   +3 more
core   +6 more sources

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