Results 31 to 40 of about 260,783 (310)
Frontiers in Physiology, 2023 Introduction: Premature ventricular contractions (PVCs) are one of the most commonly targeted pathologies for ECGI validation, often through ventricular stimulation to mimic the ectopic beat.
Laura R. Bear +19 more
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Inverse Problems Have Inverse Complexity [PDF]
, 2008 In this paper we show that inverting problems of higher complexity is easier than inverting problems of lower complexity. While inverting Σp i3CNFSAT is known to be coNP-complete sideri for i=1 we prove that it remains coNP-complete for i=2 and is in P for all i⩾ 3. Relatedly, we show that inverting Σp i3DNFSAT is in P for all i⩾ 1.
Tobias Berg, Harald Hempel
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On the inverse Collatz-Sinogowitz irregularity problem
Open 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
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Presentations of inverse semigroups, their kernels and extensions [PDF]
, 2011 "Part of this work was done while Gray was an EPSRC Postdoctoral Research Fellow at the University of St Andrews, Scotland"Let S be an inverse semigroup and let π:S→T be a surjective homomorphism with kernel K.
Ruskuc, Nik +8 more
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Scattering matrices with finite phase shift and the inverse scattering problem [PDF]
, 1996 The inverse scattering problem for the Schrodinger operator on the half-axis is studied. It is shown that this problem can be solved for the scattering matrices with arbitrary finite phase shift on the real axis if one admits potentials with long-range ...
Kurasov, Pavel, Kurasov, Pavel,
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NON-INVASIVE INVERSE PROBLEM IN CIVIL ENGINEERING
Acta 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
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Minimal Geometric Deformation: the inverse problem
European Physical Journal C: Particles and Fields, 2018 In this paper we show that any static and spherically symmetric anisotropic solution of the Einstein field equations can be thought as a system sourced by certain deformed isotropic system in the context of Minimal Geometric Deformation-decoupling ...
Ernesto Contreras
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The inverse Banzhaf problem [PDF]
Social Choice and Welfare, 2009 Let \({\mathcal{F}}\) be a family of subsets of the ground set [n] = {1, 2, . . . , n}. For each \({i \in [n]}\) we let \({p(\mathcal{F},i)}\) be the number of pairs of subsets that differ in the element i and exactly one of them is in \({\mathcal{F}}\). We interpret \({p(\mathcal{F},i)}\) as the influence of that element. The normalized Banzhaf vector
Alon, Noga, Edelman, Paul H.
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An inverse problem for biharmonic equation
International 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
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Deterministic-Statistical Approach for an Inverse Acoustic Source Problem using Multiple Frequency Limited Aperture Data [PDF]
, 2022 We propose a deterministic-statistical method for an inverse source problem using multiple frequency limited aperture far field data. The direct sampling method is used to obtain a disc such that it contains the compact support of the source.
Yanfang Liu +11 more
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