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Category of quantizations and inverse problem

open access: yesNuclear Physics B, 2023
We introduce a category composed of all quantizations of all Poisson algebras. By the category, we can treat in a unified way the various quantizations for all Poisson algebras and develop a new classical limit formulation.
Akifumi Sako
doaj   +1 more source

Modeling Groundwater Flow in Heterogeneous Porous Media with YAGMod

open access: yesComputation, 2015
Modeling flow and transport in porous media requires the management of complexities related both to physical processes and to subsurface heterogeneity. A thorough approach needs a great number of spatially-distributed phenomenological parameters, which ...
Laura Cattaneo   +4 more
doaj   +1 more source

Obtaining L-systems Rules from Strings

open access: yesVetor, 2012
Este artigo apresenta uma proposta para solucionar o Problema Inverso de Lindenmayer nas classes de gramáticas L-systems livres de contexto e determinísticas.
Edmar Santos, Regina Célia Coelho
doaj   +4 more sources

Boundary Shape Inversion of Two-Dimensional Steady-State Heat Transfer System Based on Finite Volume Method and Decentralized Fuzzy Adaptive PID Control

open access: yesApplied Sciences, 2019
A shape identification scheme was developed to determine the geometric shape of the inaccessible parts of two-dimensional objects using the measured temperatures on their accessible surfaces.
Liangliang Yang   +2 more
doaj   +1 more source

Application of direct and inverse kinematics and dynamics in motion planning of manipulator links

open access: yesInternational Journal of Applied Mechanics and Engineering, 2023
For the synthesis of manipulators and robots, an accurate analysis of the movements of the individual links is essential. This thesis deals with motion planning of the effector of a multi-linked manipulator.
Ingrid Delyová   +5 more
doaj   +1 more source

Spectral, Scattering and Dynamics: Gelfand–Levitan–Marchenko–Krein Equations

open access: yesMathematics, 2023
In this paper, we consider the Gelfand–Levitan–Marchenko–Krein approach. It is used for solving a variety of inverse problems, like inverse scattering or inverse problems for wave-type equations in both spectral and dynamic formulations.
Sergey Kabanikhin   +3 more
doaj   +1 more source

Investigation into the importance of using natural PVCs and pathological models for potential-based ECGI validation

open access: yesFrontiers 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
doaj   +1 more source

Inverse Problems Have Inverse Complexity [PDF]

open access: yes, 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
openaire   +2 more sources

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

Uniqueness of semilinear elliptic inverse problem

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2003
We consider the uniqueness of the inverse problem for a semilinear elliptic differential equation with Dirichlet condition. The necessary and sufficient condition of unique solution is obtained.
Chaochun Qu, Ping Wang
doaj   +1 more source

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