Results 41 to 50 of about 13,648,456 (359)

On the inverse Collatz-Sinogowitz irregularity problem

open access: yesOpen Mathematics, 2023
The Collatz-Sinogowitz irregularity index is the oldest known numerical measure of graph irregularity. For a simple and connected graph GG of order nn and size mm, it is defined as CS(G)=λ1−2m/n,\hspace{0.1em}\text{CS}\hspace{0.1em}\left(G)={\lambda }_{1}
Alazemi Abdullah   +2 more
doaj   +1 more source

NON-INVASIVE INVERSE PROBLEM IN CIVIL ENGINEERING

open access: yesActa Polytechnica CTU Proceedings, 2017
In this contribution we focus on recovery of spatial distribution of material parameters utilizing only non-invasive boundary measurements. Such methods has gained its importance as imaging techniques in medicine, geophysics or archaeology.
Jan Havelka   +2 more
doaj   +1 more source

A generalization of Szebehely's inverse problem of dynamics [PDF]

open access: yes, 2013
The so-called inverse problem of dynamics is about constructing a potential for a given family of curves. We observe that there is a more general way of posing the problem by making use of ideas of another inverse problem, namely the inverse problem of ...
Mestdag, T., Prince, G., Sarlet, W.
core   +3 more sources

Solving ill-posed inverse problems using iterative deep neural networks [PDF]

open access: yesarXiv.org, 2017
We propose a partially learned approach for the solution of ill-posed inverse problems with not necessarily linear forward operators. The method builds on ideas from classical regularisation theory and recent advances in deep learning to perform learning
J. Adler, O. Öktem
semanticscholar   +1 more source

Inverse problem of a buried metallic object [PDF]

open access: yes
[[abstract]]In this paper we address an inverse scattering problem whose aim is to discuss the CPU time for recovering a perfectly conducting cylindrical object buried in a half-space.
Chien, Wei
core   +1 more source

On an inverse potential problem for a fractional reaction–diffusion equation

open access: yesInverse Problems, 2019
This paper considers an inverse problem for a reaction diffusion equation from overposed final time data. Specifically, we assume that the reaction term is known but modified by a space-dependent coefficient to obtain .
B. Kaltenbacher, W. Rundell
semanticscholar   +1 more source

An inverse problem for biharmonic equation

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1988
An inhomogeneity immersed in a medium is found from the measurements of the elastic field on the surface of the medium.
A. G. Ramm
doaj   +1 more source

Machine Teaching: An Inverse Problem to Machine Learning and an Approach Toward Optimal Education

open access: yesAAAI Conference on Artificial Intelligence, 2015
I draw the reader's attention to machine teaching, the problem of finding an optimal training set given a machine learning algorithm and a target model.
Xiaojin Zhu
semanticscholar   +1 more source

Inverse problem for sl(2) lattices

open access: yes, 2002
We consider the inverse problem for periodic sl(2) lattices as a canonical transformation from the separation to local variables. A new concept of a factorized separation chain is introduced allowing to solve the inverse problem explicitly. The method is
Kuznetsov, Vadim B.
core   +2 more sources

Evaluation of in vitro toxicity of common phytochemicals included in weight loss supplements using 1H NMR spectroscopy

open access: yesFEBS Open Bio, EarlyView.
We investigated the toxicity of 12 active compounds commonly found in herbal weight loss supplements (WLS) using human liver and colon cell models. Epigallocatechin‐3‐gallate was the only compound showing significant toxicity. Metabolic profiling revealed protein degradation, disrupted energy and lipid metabolism suggesting that the inclusion of EGCG ...
Emily C. Davies   +3 more
wiley   +1 more source

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