Results 51 to 60 of about 26,208 (246)
, 2015 The Erlangian approximation of Markovian fluid queues leads to the problem of computing the matrix exponential of a subgenerator having a block-triangular, block-Toeplitz structure.
Bini, D. A. +3 more
core +1 more source
A fast algorithm for LR-2 factorization of Toeplitz matrices [PDF]
, 1995 In this paper a new order recursive algorithm for the efficient −1 factorization of Toeplitz matrices is described. The proposed algorithm can be seen as a fast modified Gram-Schmidt method which recursively computes the orthonormal columns i, i = 1,2,
Glentis, George-Othon
core +3 more sources
Coil Sketching for Fast and Efficient 4D Lung MRI Reconstruction
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose To develop and evaluate a memory‐efficient and accelerated reconstruction framework for respiratory‐resolved 4D lung MRI using coil sketching and Toeplitz approximation, enabling high‐quality motion‐compensated low‐rank (MoCo‐LR) reconstructions on clinically accessible GPU hardware.
Joseph W. Plummer +7 more
wiley +1 more source
An Improved Direction Finding Algorithm Based on Toeplitz Approximation
Sensors, 2013 In this paper, a novel direction of arrival (DOA) estimation algorithm called the Toeplitz fourth order cumulants multiple signal classification method (TFOC-MUSIC) algorithm is proposed through combining a fast MUSIC-like algorithm termed the modified ...
Qing Wang +4 more
doaj +1 more source
A preconditioned fast collocation method for a linear bond-based peridynamic model
Advances in Difference Equations, 2020 We develop a fast collocation method for a static bond-based peridynamic model. Based on the analysis of the structure of the stiffness matrix, a fast matrix-vector multiplication technique was found, which can be used in the Krylov subspace iteration ...
Xuhao Zhang +3 more
doaj +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 +2 more sources
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose Previous studies suggested that arterial‐input‐function (AIF) images are necessary to avoid signal saturation for pulmonary transit time (PTT) measurements. This study challenges that notion by investigating whether PTT can be accurately measured using blood pool signals from myocardial enhancement (non‐AIF) images during resting first‐
Mingyue Zhao +8 more
wiley +1 more source
The Inverses of Block Toeplitz Matrices
Journal of Mathematics, 2013 We study the inverses of block Toeplitz matrices based on the analysis of the block cyclic displacement. New formulas for the inverses of block Toeplitz matrices are proposed.
Xiao-Guang Lv, Ting-Zhu Huang
doaj +1 more source
Boundary correlation function of fixed-to-free bcc operators in square-lattice Ising model
, 2006 We calculate the boundary correlation function of fixed-to-free boundary condition changing operators in the square-lattice Ising model. The correlation function is expressed in four different ways using $2\times2$ block Toeplitz determinants.
+4 more
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International Journal of Dermatology, EarlyView.ABSTRACT Background Patients with alopecia areata (AA) in ALLEGRO‐2b/3 (NCT03732807) had clinically significant hair regrowth and patient‐reported improvements with ritlecitinib versus placebo, but patient‐reported improvements in AA Patient Priority Outcomes (AAPPO) emotional symptoms (ES) or activity limitations (AL) were not observed during the 24 ...
Ernest H. Law +8 more
wiley +1 more source