Results 141 to 150 of about 26,746 (306)
Rational interpolation and mixed inverse spectral problem for finite CMV matrices
, 2009 For finite-dimensional CMV matrices the mixed inverse spectral problem of reconstructing the matrix by its submatrix and a part of its spectrum is considered.
Kudryavtsev, Mikhail, Golinskii, Leonid
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Physical Origin of Temperature Induced Activation Energy Switching in Electrically Conductive Cement
Advanced Science, EarlyView.The temperature‐induced Arrhenius activation energy switching phenomenon of electrical conduction in electrically conductive cement originates from structural degradation within the biphasic ionic‐electronic conduction architecture and shows percolation‐governed characteristics: pore network opening dominates the low‐percolation regime with downward ...
Jiacheng Zhang +7 more
wiley +1 more source
Neural Fields for Highly Accelerated 2D Cine Phase Contrast MRI
Advanced Science, EarlyView.ABSTRACT 2D cine phase contrast (CPC) MRI provides quantitative information on blood velocity and flow within the human vasculature. However, data acquisition is time‐consuming, motivating the reconstruction of the velocity field from undersampled measurements to reduce scan times. In this work, neural fields are proposed as a continuous spatiotemporal
Pablo Arratia +7 more
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Continuations of Hermitian indefinite functions and corresponding canonical systems : an example
, 2004 M. G. Krein established a close connection between the continuation problem of positive definite functions from a finite interval to the real axis and the inverse spectral problem for differential operators.
Langer, M. +5 more
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Interpolation and inverse problems in spectral Barron spaces
CoRRSpectral Barron spaces, which quantify the absolute value of weighted Fourier coefficients of a function, have gained considerable attention due to their capability for universal approximation across certain function classes. By establishing a connection between these spaces and a specific positive linear operator, we investigate the interpolation and ...
Shuai Lu, Peter Mathé
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The inverse spectral problem for indefinite strings [PDF]
, 2014 Motivated by the study of certain nonlinear wave equations (in particular, the Camassa–Holm equation), we introduce a new class of generalized indefinite strings associated with differential equations of the form −u" = z u ω + z2u υ on an interval [0, L),
Jonathan Eckhardt (5731769) +3 more
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, 2004 Many self-adjoint operators appearing in mathematical physics and geometry have their spectral data: eigenvalues informations of eigenvectors scattering matrices.
ISOZAKI Hiroshi
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Advanced Science, EarlyView.Laser‐induced graphene (LIG) provides a scalable, laser‐direct‐written route to porous graphene architecture with tunable chemistry and defect density. Through heterojunction engineering, catalytic functionalization, and intrinsic self‐heating, LIG achieves highly sensitive and selective detection of NOX, NH3, H2, and humidity, supporting next ...
Md Abu Sayeed Biswas +6 more
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Asymptotic inverse spectral problem for anharmonic oscillators
Communications in Mathematical Physics, 1987 The paper studies the direct and inverse spectral problem for perturbations \(L=A+B\) of the harmonic oscillator \(A=()(-\partial^ 2+x^ 2)\) on \({\mathbb{R}}\), where potential B(x) has a prescribed asymptotics at \(\{\infty \}\), \(B(x)\sim | x|^{-\alpha}V(x)\), with a trigonometric function \(V(x)=\sum a_ m \cos \omega_ mx.\) The k-th eigenvalue of ...
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Shape constrained estimators in inverse regression models with convolution-type operator [PDF]
In this paper we are concerned with shape restricted estimation in inverse regression problems with convolution-type operator. We use increasing rearrangements to compute increasingand convex estimates from an (in principle arbitrary) unconstrained ...
Bissantz, Nicolai, Birke, Melanie
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