Results 21 to 30 of about 8,186 (267)
Thermal Simulations, Open Boundary Conditions and Switches
EPJ Web of Conferences, 2018 SU(N) gauge theories on compact spaces have a non-trivial vacuum structure characterized by a countable set of topological sectors and their topological charge. In lattice simulations, every topological sector needs to be explored a number of times which
Burnier Yannis +3 more
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Journal of Magnesium and Alloys, 2022 In this work, pre-strain annealing strengthening (PSAS) effect was investigated in an extruded Mg-1.0Gd-1.5 Zn (wt.%) alloy with respect to different grain sizes.
Qinghang Wang +8 more
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Scientific Reports, 2018 Helmholtz resonators offer an ideal platform for advanced sound absorbers, but their utility has been impeded by inherent frequency range limitations and the lack of function reconfiguration.
Houyou Long, Ying Cheng, Xiaojun Liu
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Boundary Element formulation for Electrical Impedance Tomography [PDF]
ESAIM: Proceedings, 2005 Summary: This paper concerns the modelisation and simulation of the forward problem of Electrical Impedance Tomography (EIT), i.e., the computation of an electrical potential due to an applied boundary current. The underlying goal is the estimation of the conductivities of the head tissues, in particular the skull, in order to improve the head models ...
Clerc, M. +4 more
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On the impedance boundary condition
Applied Mathematical Modelling, 1982 The use of the impedance boundary condition (IBC) provides a useful means of treating the problem of scattering by a material object and rough surfaces. A systematic development of the subject is presented. Alternative forms of the IBC are given and their range of validity is discussed.
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Impedance Passive and Conservative Boundary Control Systems [PDF]
Complex Analysis and Operator Theory, 2007 The external Cayley transform is used for the conversion between the linear dynamical systems in scattering form and in impedance form. We use this transform to define a class of formal impedance conservative boundary control systems (colligations), without assuming a priori that the associated Cauchy problems are solvable. We give su!
Jarmo Malinen, Olof J. Staffans
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PLoS ONE, 2017 The late Permian mass extinction event was the largest biotic crisis of the Phanerozoic and has the longest recovery interval of any extinction event.
William J Foster +3 more
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RECONSTRUCTION OF A POTENTIAL FROM THE IMPEDANCE BOUNDARY MAP [PDF]
Eurasian Journal of Mathematical and Computer Applications, 2013 We give formulas and equations for finding generalized scattering data for the Schrödinger equation in open bounded domain at fixed energy from the impedance boundary map (or Robin-to-Robin map). Combining these results with results of the inverse scattering theory we obtain efficient methods for reconstructing potential from the impedance boundary map.
Isaev, Mikhail, Novikov, Roman
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Generalized Impedance Boundary Conditions with Vanishing or Sign-Changing Impedance
SIAM Journal on Mathematical AnalysisWe consider a Laplace type problem with a generalized impedance boundary condition of the form $\partial_νu=-\partial_x(g\partial_xu)$ on a flat part $Γ$ of the boundary. Here $ν$ is the outward unit normal vector to $\partialΩ$, $g$ is the impedance function and $x$ is the coordinate along $Γ$.
Bourgeois, Laurent, Chesnel, Lucas
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A boundary element eigensolver for acoustic resonances in cavities with impedance boundary conditions [PDF]
The Journal of the Acoustical Society of America, 2020 This letter presents a boundary element scheme for analysis of acoustic resonances in cavities with impedance boundary conditions. The resultant eigenproblem, which is nonlinear and difficult to solve directly, is transformed to a linear one through a contour integral method. A variant-parameter scheme based on the Burton-Miller combined formulation is
Cheng, Wan +3 more
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