Results 131 to 140 of about 1,101,519 (253)

Optimizing Selective RF Pulses for Enhanced Signal Stability in Turbo Spin Echo Using a Differentiable Extended Phase Graph Model

Magnetic Resonance in Medicine, Volume 96, Issue 1, Page 214-226, July 2026.
ABSTRACT Purpose To improve slice profile consistency across echo trains in turbo spin echo (TSE) imaging, thereby reducing image blurring and increasing the accuracy of multi echo spin echo T2$$ {T}_2 $$ mapping. Methods Excitation and refocusing RF pulses were optimized for TSE using a differentiable extended phase graph model that incorporates the ...
Madison M. Augelli, Anuj Sharma, Mark A. Griswold, William A. Grissom   +3 more
wiley   +1 more source

A Global Krylov Subspace Method for the Sylvester Quaternion Matrix Equation

Journal of New Theory
This study concerns the Sylvester matrix equation in the quaternion setting when the coefficient matrices as well as the unknown matrix have quaternion entries.
Sinem Şimşek
doaj   +1 more source

f16 – NAG Interface to BLAS f16rac [PDF]

NAG C Library Function Document nag_dge_norm (f16rac) nag_dge_norm (f16rac) calculates the value of the 1-norm, the infinity-norm, the Frobenius norm, or the maximum absolute value of the elements, of a real m by n ...
Xm X
core  

Geometric Planted Matchings Beyond the Gaussian Model

Random Structures &Algorithms, Volume 68, Issue 4, July 2026.
ABSTRACT We consider the problem of recovering an unknown matching between a set of n$$ n $$ randomly placed points in ℝd$$ {\mathbb{R}}^d $$ and random perturbations of these points. This can be seen as a model for particle tracking and more generally, entity resolution.
Lucas R. Schwengber, Roberto I. Oliveira
wiley   +1 more source

Capital in Motion: Synthesizing the Circulation and Reproduction in a Multi‐Sector Growth Model

Metroeconomica, Volume 77, Issue 3, Page 274-288, July 2026.
ABSTRACT This paper analyzes Capital in Motion (CIM) in a capitalist economy, based on Karl Marx's Capital, Volume 2. It examines the circuit of capital, distinguishing between stock and flow variables, and integrates a multi‐sector growth model that combines the circuit and turnover of capital with the reproduction scheme.
Takashi Satoh
wiley   +1 more source

Enhancing Direction-of-Arrival Estimation for Single-Channel Reconfigurable Intelligent Surface via Phase Coding Design

Remote Sensing
Traditional antenna arrays for direction-of-arrival (DOA) estimation typically require numerous elements to achieve target performance, increasing system complexity and cost.
Changcheng Hu, Ruoyu Zhang, Jingqi Wang, Boyu Sima, Yue Ma, Chen Miao, Wei Kang   +6 more
doaj   +1 more source

On the Frobenius norm of the inverse of a non-negative matrix

Linear Algebra and its Applications
We prove a new lower bound for the Frobenius norm of the inverse of an non-negative matrix. This bound is only a modest improvement over previous results, but is sufficient for fully resolving a conjecture of Harwitz and Sloane, commonly referred to as the S-matrix conjecture, for all dimensions larger than a small constant.
Frankel, Elsa, Urschel, John
openaire   +2 more sources

On the Lang–Trotter conjecture for Siegel modular forms

Mathematika, Volume 72, Issue 3, July 2026.
Abstract Let f$f$ be a genus‐two cuspidal Siegel eigenform. We prove an adelic open image theorem for the compatible system of Galois representations associated with f$f$, generalizing the results of Ribet and Momose for elliptic modular forms. Using this result, we investigate the distribution of the Hecke eigenvalues ap$a_p$ of f$f$, and obtain upper
Arvind Kumar, Moni Kumari, Ariel Weiss
wiley   +1 more source

Phenome‐ and Genome‐Wide Insights Into Dietary Patterns: Health Consequences and Genetic Basis

eFood, Volume 7, Issue 3, June 2026.
Three new dietary patterns were derived from quadratically regularized‐principal components analysis. These patterns showed strong associations with a wide range of diseases and genetic factors. ABSTRACT Dietary patterns (DPs) integrate complex eating behaviors and provide stronger insights into health than analyses of single nutrients.
Shuxiao Shi, Ying Dong, Zixin Hu, Libing Shen, Sujing Wang, Shuo Jiang, Deshan Wu, Nannan Feng, Lan Xu, Kexin Li, Kaixiong Ye, Xihao Du, Victor W. Zhong, Jingqi Zhou   +13 more
wiley   +1 more source

Data‐Driven Characterization of Knee Structures Using Non‐Negative Matrix Factorization of 3D Multi‐Echo UTE MRI

NMR in Biomedicine, Volume 39, Issue 6, June 2026.
Non‐negative matrix factorization (NMF) can derive tissue features in a data‐driven manner without relying on biophysical model assumptions. First‐time application of NMF to 3D multi‐echo UTE knee MRI revealed four reproducible components associated with tissues of fast and slow transverse relaxation, water–fat mixture (chemical shift), and fat tissue.
Céline Smekens, Pieter Van Dyck, Patrick S. Fuchs, Jan Sijbers, Thomas Janssens, Ben Jeurissen   +5 more
wiley   +1 more source