Results 61 to 70 of about 1,076,716 (239)

DREAMER: Rapid and Simultaneous Multiple Contrast Magnetic Resonance Imaging of Solid and Soft Tissue

Magnetic Resonance in Medicine, Volume 95, Issue 3, Page 1513-1527, March 2026.
ABSTRACT Purpose Pediatric craniofacial imaging may involve examination of both the skull and brain tissues via CT and MRI, respectively. DREAMER (Dual Repetition and Echo Acquisition with Multi‐contrast Encoding and Reconstruction) simultaneously acquires solid‐ and soft‐tissue images, potentially providing a rapid, high‐resolution, and radiation‐free
Brian‐Tinh Duc Vu, Nada Kamona, Felix W. Wehrli, Rajiv S. Deshpande, Hee Kwon Song, Allison Hu, Emily Baccaglini, Scott P. Bartlett, Chamith S. Rajapakse   +8 more
wiley   +1 more source

Dual Toeplitz Operators on the Orthogonal Complement of the Generalized Fock Space

Mathematics
We characterize the boundedness and compactness of dual Toeplitz operators on the orthogonal complement of the generalized Fock space. We study the problem when the finite sum of the dual Toeplitz products is compact.
Baoli Xie, Jianxiang Dong, Caochuan Ma
doaj   +1 more source

On the composition of Berezin-Toeplitz operators on symplectic manifolds

, 2018
We compute the second coefficient of the composition of two Berezin-Toeplitz operators associated with the $\text{spin}^c$ Dirac operator on a symplectic manifold, making use of the full-off diagonal expansion of the Bergman kernel.Comment: accepted for ...
Ioos, Louis
core   +1 more source

Toeplitz operators on concave corners and topologically protected corner states [PDF]

Letters in Mathematical Physics, 2019
We consider Toeplitz operators defined on a concave corner-shaped subset of the square lattice. We obtain a necessary and sufficient condition for these operators to be Fredholm.
S. Hayashi
semanticscholar   +1 more source

Modeling and Forecasting Stochastic Seasonality: Are Seasonal Autoregressive Integrated Moving Average Models Always the Best Choice?

Journal of Forecasting, Volume 45, Issue 1, Page 316-334, January 2026.
ABSTRACT In this paper, we study models for stochastic seasonality and compare the well‐known SARIMA models to Seasonal Autoregressive Unit Root Moving Average (SARUMA) models. SARUMA models assume that the polynomial of the stationarizing differencing operator has roots on the unit circle at some seasonal frequencies, while SARIMA models impose roots ...
Evangelos E. Ioannidis, Sofia‐Eirini Nikolakakou   +1 more
wiley   +1 more source

On semibounded Toeplitz operators

, 2016
We show that a semibounded Toeplitz quadratic form is closable in the space $\ell^2({\Bbb Z}_{+})$ if and only if its matrix elemens are Fourier coefficients of an absolutely continuous measure.
Yafaev, D. R.
core   +3 more sources

Ultra‐Short‐Term Wind Speed Prediction Based on Information Aggregation With Spatial Decoupling in Turbine Cluster Space

IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
Core approach: hybrid model combining wake dynamics, spectral clustering and adaptive neighbourhood selection. Methodology: spatial decoupling → representative turbine identification → feature aggregation via memory network. Outcome: enhanced prediction accuracy validated by real‐data comparisons, addressing spatial correlation challenges in wind farms.
Xiaofeng Zhu, Zhenxin Li, Chenghan Hou, Shoukun Zou   +3 more
wiley   +1 more source

Calculation of the Density of States Using Discrete Variable Representation and Toeplitz Matrices

, 1995
A direct and exact method for calculating the density of states for systems with localized potentials is presented. The method is based on explicit inversion of the operator $E-H$.
, A Baram, Aguilar J, Alexander S, Baer M, Balslev E, Baram A, Baram A, Burke P G, Dickinson A S, E Eisenberg, Grenander U, Harris D O, Jauho A P, M Baer, Macias A, Moiseyev N, Moiseyev N, Porto J A, Simon B, Simons J, Taylor H S   +21 more
core   +1 more source

The sharp upper bound for generation of linear semigroups by higher order equations with fractional powers

Bulletin of the London Mathematical Society, Volume 58, Issue 1, January 2026.
Abstract In this paper, we consider a class of higher‐order equations and show a sharp upper bound on fractional powers of unbounded linear operators associated with higher‐order abstract equations in Hilbert spaces.
Flank D. M. Bezerra, Lucas A. Santos, Maria J. M. Silva   +2 more
wiley   +1 more source

Boundedness of Toeplitz type operators associated to Riesz potential operator with general kernel on Orlicz space

Open Mathematics, 2015
In this paper, the boundedness properties for some Toeplitz type operators associated to the Riesz potential and general integral operators from Lebesgue spaces to Orlicz spaces are proved.
Chen Dazhao
doaj   +1 more source