Results 91 to 100 of about 884,568 (273)

Strain Rate Angle Distribution as an Indicator of Post‐Infarct Myocardial Remodeling: Proof‐of‐Concept of a Novel Application of the MRI Derived Strain Rate Tensor Field

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Left ventricular (LV) strain is an early indicator of myocardial dysfunction. However, conventional strain metrics do not fully account for the multidirectional nature of myocardial deformation. The strain rate tensor, derived from velocity‐encoded MRI, represents the time‐resolved magnitude and direction of strain rate without the ...
Lasse Totland, Bård A. Bendiksen, Einar S. Nordén, Ida Marie Hauge‐Iversen, Kaja Knudsen Bergo, Lili Zhang, Ivar Sjaastad, Emil K. S. Espe   +7 more
wiley   +1 more source

Sparse-Grid Gaussian Kernel Quadrature Kalman Filter for Nonlinear State Estimation

Aerospace
Nonlinear state estimation plays an important role in aerospace sensing applications, where estimation accuracy must be balanced against computational efficiency.
Yijie Zhao, Hao Wu, Guoxu Zeng, Minbo Yang, Chaoqi Li, Sahan Rathnayake   +5 more
doaj   +1 more source

Bandlimited quadrature rule for projection based model order reduction

, 2007
A quadrature rule is presented in order to obtain bandlimited Laguerre-type reduced order models efficiently. The quadrature points are chosen in accordance with the phase variation of the bandlimited Laguerre functions.
De Zutter, Daniël, G. Lippens, Knockaert, Luc, L. Knockaert, D. De Zutter, Lippens, Gunther   +5 more
core   +1 more source

Sharp inequality of three point Gauss-Legendre quadrature rule

, 2020
An interesting identity for 3-point Gauss-Legendre quadrature rule using functions that are n-times differentiable. By applying the established identity, a sharp inequality which gives an error bound for 3-point Gauss-Legendre quadrature rule and some ...
Kashuri, Artion
core   +1 more source

Optimal Transmission Performance of Quadrature Wireless Resonators at 3 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To demonstrate a method for optimizing the efficiency of wireless resonators using tailored excitation from a dual‐transmit birdcage coil (BC), and to present the design and experimental investigation of a quadrature resonator for 3 T breast MRI application.
Leila Sharipova, Dmitrii Tikhonenko, Christophe Vilmen, David Bendahan, Stefan Enoch, Redha Abdeddaim, Alena Shchelokova, Marc Dubois   +7 more
wiley   +1 more source

Stability Analysis and Finite Difference Approximations for a Damped Wave Equation with Distributed Delay

Mathematics
This paper presents a fully implicit finite difference scheme for the numerical approximation of a wave equation featuring strong damping and a distributed delay term. The discretization employs second-order accurate approximations in both time and space.
Manal Alotaibi
doaj   +1 more source

Toward Brain Biosignature at 7 T—Repeatability of a Multiparametric CEST, QSM, QTI, and Sodium Imaging Protocol

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To evaluate the repeatability of an extended multiparametric 7 T MRI protocol for voxel‐wise tissue characterization combining morphological, CEST, QSM, QTI, and Sodium contrasts. Methods A repeatability study was performed in 12 volunteers without diagnosed neurological disease on a 7 T MRI system, using a comprehensive acquisition ...
Annika Hofmann, Martin Freudensprung, Lion Mücke, Tobias Wilferth, Zijin Yang, Dominik Perrin, Julius Glaser, Katharina Tkotz, Magda Duarte, Simon Weinmüller, Oliver Chaudry, Annemarie Wirth, Angelika Mennecke, Oliver Gödicke, Patrick Liebig, Lena V. Gast, Philipp Ehses, Clemens Stilianu, Rudolf Stollberger, Jannis Hanspach, Alexander German, Jürgen Winkler, Michael Uder, Arnd Doerfler, Sebastian Bickelhaupt, Andreas Maier, Katharina Breininger, Moritz Zaiss, Armin M. Nagel, Frederik B. Laun, Florian Knoll   +30 more
wiley   +1 more source

Designing ZV and ZVD Input Shapers Using the Designed Fixed Output Response Method to Suppress Residual Vibration of Overhead Crane Systems With Trolley Traveling and Payload Hoisting

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Classical Zero Vibration (ZV) and Zero Vibration and Derivative (ZVD) input shapers are designed around a fixed nominal natural frequency and cannot accommodate the time‐varying dynamics introduced when an overhead crane simultaneously travels and hoists a payload.
Mohammad Alfares, Khaled Alhazza
wiley   +1 more source

Gaussian Filtering Using a Spherical-Radial Double Exponential Cubature

IEEE Open Journal of Signal Processing
Gaussian filters use quadrature rules or cubature rules to recursively solve Gaussian-weighted integrals. Classical and contemporary methods use stable rules with a minimal number of cubature points to achieve the highest accuracy. Gaussian quadrature is
Quade Butler, Youssef Ziada, S. Andrew Gadsden   +2 more
doaj   +1 more source

Lp –Error Bounds of Two and Three–Point Quadrature Rules For Riemann–Stieltjes Integrals

Moroccan Journal of Pure and Applied Analysis, 2018
In this work, Lp-error estimates of general two and three point quadrature rules for Riemann-Stieltjes integrals are given. The presented proofs depend on new triangle type inequalities of Riemann-Stieltjes integrals.
Alomari Mohammad W., Guessab Allal
doaj   +1 more source