Results 91 to 100 of about 55,329 (202)

Relaxivity of Gadobutrol and Gadoteric Acid in Cerebrospinal Fluid at 3T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose The aim was to estimate T1 relaxivity of gadobutrol and gadoteric acid in cerebrospinal fluid (CSF) at 3T, to support research on CSF‐flow and the glymphatic system in humans utilizing T1 mapping after intrathecal injection. Methods Using a phantom, relaxivity was estimated for gadobutrol and gadoteric acid in lumbar CSF and an ...
Sofia Behndig, Anders Garpebring, Daniel Dahlgren Lindström, Jan Malm, Anders Wåhlin, Anders Eklund   +5 more
wiley   +1 more source

Damage Identification in Bars with a Wave Propagation Approach: Performance Comparison of Five Hybrid Optimization Methods

Shock and Vibration, 2013
The formulation and solution of the inverse problem of damage identification based on an one-dimensional wave propagation approach are presented in this paper.
R.A. Tenenbaum, L.T. Stutz, K.M. Fernandes   +2 more
doaj   +1 more source

Spectropolarimetric NLTE inversion code SNAPI

, 2018
Inversion codes are computer programs that fit a model atmosphere to the observed Stokes spectra, thus retrieving the relevant atmospheric parameters. The rising interest in the solar chromosphere, where spectral lines are formed by scattering, requires ...
Milic, Ivan, van Noort, Michiel
core   +1 more source

Ellipsoid‐Based Interval‐Type Uncertainty Model Updating Based on Riemannian Manifold and Gaussian Process Model

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Modern engineering systems require advanced uncertainty‐aware model updating methods that address parameter correlations beyond conventional interval analysis. This paper proposes a novel framework integrating Riemannian manifold theory with Gaussian Process Regression (GPR) for systems governed by Symmetric Positive‐Definite (SPD) matrix ...
Yanhe Tao, Qintao Guo, Jin Zhou, Cheng Yi   +3 more
wiley   +1 more source

Solid Particle Erosion and Predictive Modeling of Epoxy Composites Reinforced With Diatom Frustules

Polymer Composites, EarlyView.
Schematic representation of the solid particle erosion process and predictive modeling workflow for diatom frustule‐reinforced epoxy composites, illustrating the test setup, erosion response curve, and filler‐matrix interaction. ABSTRACT This study examines the solid particle erosion wear behavior of epoxy composites reinforced with 5–20 wt% calcined ...
Elif Gültürk, Eser Yarar, Orkan Baran Korkusuz, Aleyna Kara, Tamer Sınmazçelik   +4 more
wiley   +1 more source

A two-step smoothing Levenberg-Marquardt algorithm for real-time pricing in smart grid

AIMS Mathematics
As is well known, the utility function is significant for solving the real-time pricing problem of smart grids. Based on a new utility function, the social welfare maximization model is considered in this paper.
Linsen Song , Gaoli Sheng
doaj   +1 more source

A Monte-Carlo-Based Network Method for Source Positioning in Bioluminescence Tomography

International Journal of Biomedical Imaging, 2007
We present an approach based on the improved Levenberg Marquardt (LM) algorithm of backpropagation (BP) neural network to estimate the light source ...
Zhun Xu, Xiaolei Song, Xiaomeng Zhang, Jing Bai   +3 more
doaj   +1 more source

Fast and numerically stable circle fit

, 2015
We develop a new algorithm for fitting circles that does not have drawbacks commonly found in existing circle fits. Our fit achieves ultimate accuracy (to machine precision), avoids divergence, and is numerically stable even when fitting circles get ...
Abdul-Rahman, Houssam, Chernov, Nikolai
core   +1 more source

Comparison of the Coating Structure of Silicon‐Based PECVD Coatings With Varying Organic Content

Plasma Processes and Polymers, EarlyView.
Silicon‐based PECVD coatings transition abruptly from organic SiOCH to oxidic SiOx at ~32 at% silicon, exhibiting threshold behavior in barrier performance. Chemical composition seems to dominate over porosity: SiOx coatings unexpectedly show higher porosity yet superior barrier properties, possibly due to rigid cage‐like molecular structures ...
Jonas Franke, Maciej Oskar Liedke, Andreas Schäfer, Maik Butterling, Ahmed Gamal Attallah, Eric Hirschmann, Andreas Wagner, Rainer Dahlmann   +7 more
wiley   +1 more source

Development of a physiologically‐based pharmacokinetic model for Ritonavir characterizing exposure and drug interaction potential at both acute and steady‐state conditions

CPT: Pharmacometrics &Systems Pharmacology, Volume 14, Issue 3, Page 523-539, March 2025.
Abstract Ritonavir (RTV) is a potent CYP3A inhibitor that is widely used as a pharmacokinetic (PK) enhancer to increase exposure to select protease inhibitors. However, as a strong and complex perpetrator of CYP3A interactions, RTV can also enhance the exposure of other co‐administered CYP3A substrates, potentially causing toxicity.
Lien Thi Ngo, Woojin Jung, Tham Thi Bui, Hwi‐yeol Yun, Jung‐woo Chae, Jeremiah D. Momper   +5 more
wiley   +1 more source