Results 31 to 40 of about 596 (116)

Accelerated water residual removal in MRS: Exploring deep learning versus fitting‐based approaches

Magnetic Resonance in Medicine, Volume 95, Issue 1, Page 38-50, January 2026.
Abstract PurposeRemoving water residual signals from MRS spectra is crucial for accurate metabolite quantification. However, currently available algorithms are computationally intensive and time‐consuming, limiting their clinical applicability. This work aims to propose and validate two novel pipelines for fast water residual removal in MRS. MethodsTwo
Federico Turco, Johannes Slotboom, Milena Capiglioni   +2 more
wiley   +1 more source

Hankel and Loewner matrices

Linear Algebra and its Applications, 1984
Es sei \(A=(a_{i,k}) (i,k=0,...,n-1)\) eine komplexe Matrix. Gilt mit komplexen Zahlen \(c_ 0,...,c_{2n-2}\) einerseits \(a_{i,k}=c_{i+k}\), so heißt A Hankel-Matrix, oder andererseits \(a_{i,k}=c_{n+i-k}\), so heißt A Toeplitz-Matrix. Schließlich wird A eine Loewner-Matrix genannt, wenn \(a_{i,k}=(c_ i-d_ k)(y_ i-z_ k)^{-1}\) entsprechend mit ...
openaire   +2 more sources

The Triangular Decomposition of Hankel Matrices [PDF]

Mathematics of Computation, 1971
An algorithm for determining the triangular decomposition H = R ∗ D R H = {R^ \ast }DR of a Hankel matrix H using O ( n 2 ) O({n^2}) operations is derived.
openaire   +1 more source

Reproducibility of Metabolic Mapping Using 2D Multi‐Slice Short‐TE and GABA‐Edited Spin‐Echo MRSI at 3T in a Single Protocol

NMR in Biomedicine, Volume 39, Issue 1, January 2026.
Short‐TE MRSI at 3T enables reproducible metabolic mapping for tNAA, tCr, tCho, mI, and Glx; however, GABA+ mapping with edited MRSI remains challenging due to susceptibility to intermittent subject motion. Although 96% of regions from the short‐TE MRSI met quality control for major metabolites for at least one visit, only 82.5% of voxels of the GABA ...
Helge J. Zöllner, Dillip K. Senapati, İpek Özdemir, Kimberly L. Chan, Georg Oeltzschner, Doris D. M. Lin, Peter B. Barker   +6 more
wiley   +1 more source

Gradient Scheme Optimization for PRESS‐Localized Edited MRS Using Weighted Pathway Suppression

NMR in Biomedicine, Volume 39, Issue 1, January 2026.
This study presents an optimized DOTCOPS‐based gradient scheme for PRESS‐localized edited MRS that integrates a volume‐based likelihood model to prioritize suppression of unwanted coherence transfer pathways. Using a dual‐penalty genetic algorithm, the scheme achieved a 197% increase in k‐space crushing efficiency and significantly reduced out‐of‐voxel
Gizeaddis L. Simegn, Zahra Shams, Saipavitra Murali‐Manohar, Dunja Simicic, Abdelrahman Gad, Yulu Song, Vivek Yedavalli, Christopher W. Davies‐Jenkins, Aaron T. Gudmundson, Helge J. Zöllner, Georg Oeltzschner, Richard A. E. Edden   +11 more
wiley   +1 more source

Polynomials and Hankel matrices

Linear Algebra and its Applications, 1985
Compatibility of a Hankel \(n\times n\)-matrix H and a polynomial f of degree m, \(m\leq n\), is defined. If \(m=n\), compatibility means that \(HC^ T_ f=C_ fH\) where \(C_ f\) is the companion matrix of f.
openaire   +1 more source

Decentralised and Centralised Fixed Structure H∞ Robust Loop Shaping for the MIMO Microsurgical Manipulation Based on PSOGSA

IET Control Theory &Applications, Volume 20, Issue 1, January/December 2026.
This paper presents a robust H∞ decentralised and centralised control approach for a microsurgical manipulator using Particle Swarm Optimisation and Gravitational Search Algorithm (PSOGSA). The proposed fixed‐structure Proportional‐Integral‐Derivative (PID)‐based controllers address implementation challenges of conventional high‐order H∞ controllers ...
Somyot Kaitwanidvilai, Poom Konghuayrob, Hisayuki Aoyama   +2 more
wiley   +1 more source

Advances in Characterising Dielectric Materials at Microwave Frequencies Using Circular Open Waveguides

Electronics Letters, Volume 62, Issue 1, January/December 2026.
The dielectric characterisation method using an open circular waveguide, while widely recognised for its advantages, faces key limitations such as multiple solutions during data extraction and an imperfect calibration process. Our research introduces solutions that ensure convergence toward a unique result and enhance calibration accuracy, particularly
Baptiste Henriot, Olivier Tantot, Ali Dia, Aurélien Périgaud, Nicolas Delhote, Serge Verdeyme, Steven Granet, Emmanuel Perrin   +7 more
wiley   +1 more source

Fast eigenvalue algorithm for Hankel matrices

SPIE Proceedings, 1998
A pioneering transfer of experience from the real symmetric matrices to their complex symmetric counterparts. NB: The idea could find a broad applicability [cf. PT symmetric quantum mechanics models in \textit{F. M. Fernandez, R. Guardiola, J. Ros}, and \textit{M. Znojil}, J. Phys. A: Math. Gen. 31, No. 50, 10105-10112 (1998) for a sample].
Luk, Franklin T., Qiao, Sanzheng
openaire   +2 more sources

Product of Rectangular Toeplitz (Hankel) Matrices

Computational Mathematics and Mathematical Physics
In this paper, we study products of asymmetric Toeplitz matrices, we give necessary and sufficient conditions for the product of two asymmetric Toeplitz matrices compatible sizes is asymmetric Toeplitz matrix. We also give some results related to the isometry.
Bensliman, S., Yagoub, A., Toumache, K.
openaire   +2 more sources