Results 141 to 150 of about 3,669,023 (333)
Advanced Materials Interfaces, EarlyView.Volume changes of a solid‐state battery cell are separated into the individual contributions of anode and cathode. Simultaneously determining the “reaction volumes” of both electrodes requires a reference electrode with a pressure‐independent potential.
Mervyn Soans +5 more
wiley +1 more source
Numerical method for a Cauchy problem for multi-dimensional Helmholtz equation
Applied Mathematics in Science and EngineeringThe main focus of this research is to address the Cauchy problem of the multi-dimensional Helmholtz equation with mixed boundary conditions. This problem is known to be ill-posed according to Hadamard's definition.
Xianli Lv, Xiufang Feng
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Advanced Materials Interfaces, EarlyView.In situ SAXS/WAXS enables real‐time tracking of nanoparticle formation and evolution in exsolved and infiltrated Ni‐based perovskites under reducing conditions. The combined technique captures nucleation, growth, and coarsening dynamics with high temporal resolution, providing statistically robust insights into structural and morphological ...
Elena Vicente +4 more
wiley +1 more source
An efficient and accurate modified Adomian decomposition method for solving the Helmholtz equation with high-wavenumber [PDF]
Surveys in Mathematics and its ApplicationsThis paper presents a modified Adomian decomposition method (MADM) for solving the one and two-dimensional Helmholtz equation with large wavenumbers. The standard Adomian decomposition method (ADM) suffers from severe divergence issues as the wavenumber ...
Saleem Nasser Alomari +1 more
doaj
Helmholtz operators on infinite graphs
HeliyonThe Helmholtz equation in its simplest form is Δu(a)=−k2u(a). In this note, we study a generalized discrete version of this equation on an infinite graph, by using potential-theoretic methods.
Varadha Raj Manivannan +1 more
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Bound on global error of the fast multipole method for Helmholtz equation in 2-D
, 2018 This paper analyze the global error of the fast multipole method(FMM) for two-dimensional Helmholtz equation. We first propose the global error of the FMM for the discretized boundary integral operator.
Meng, Wenhui
core
An inverse problem for Helmholtz's equation II
Inverse Problems, 1987 [For part I see ibid. 3, L 19-L 22 (1987; Zbl 0619.35109).] A method is given for recovery of n(z) and h(k) in \[ [\nabla^ 2+k^ 2n(z)]u=-\delta (x)h(k)\quad in\quad R^ 3 \] from the surface data.
openaire +2 more sources
Phonon Engineering in Ultrathin Sn Films
Advanced Materials Interfaces, EarlyView.When embedded in multilayer structures, ultrathin Sn layers demonstrate strongly modified vibrational density of states (VDOS). This allows engineering a drastic increase of the Lamb‐Mössbauer factor fLM$f_{\text{LM}}$ and thereby of the cross‐section for coherent excitation of the ultrasharp nuclear resonance of 119Sn$^{119}{\rm Sn}$. This enables the
Sven Velten +9 more
wiley +1 more source
Optical Detection and Modeling of Lithium Deposition on Copper Current Collectors
Advanced Materials Interfaces, EarlyView.ABSTRACT Understanding lithium (Li) deposition on copper (Cu) substrates is essential for improving the performance and lifetime of zero–excess lithium metal batteries. In this study, Li deposition was investigated under realistic coin–cell conditions using complementary scanning electron microscopy and laser scanning microscopy. A semi–automatic image
Tjark T. K. Ingber +4 more
wiley +1 more source
Analysis of the Shifted Helmholtz Expansion Preconditioner for the Helmholtz Equation
, 2018 We study in this paper the so-called expansion preconditioner which is a generalization of the shifted Helmholtz preconditioner. We show that this preconditioner can reduce the number of GMRES iterations if the meshsize is small enough and the shift is at most of the size of the wavenumber.
Cocquet, Pierre-Henri, Gander, Martin
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