«relaxation parameters»
۱۰٬۰۷۶ نتیجهThe effect of pore size and magnetic susceptibility on the surface NMR relaxation parameter T 2 *
Surface nuclear magnetic resonance (NMR) is a non-invasive geophysical method that can provide valuable information about aquifer properties related to groundwater flow and storage. Our ability to extract such information from surface NMR data, however, is limited by an insuffici
The Optimal Relaxation Parameter for the SOR Method Applied to a Classical Model Problem
The successive overrelaxation (SOR) method is an example of a classical iterative method for the approximate solution of a system of linear equations. Its iteration matrix depends on a relaxation parameter. There is no explicit formula for the optimal relaxation parameter in term
Relaxation Parameters of N-acetyl in Healthy and Osteo-Arthritic Cartilage - An High Resolution Magic Angle Spinning (HR- MAS) Study
Osteoarthritis (OA) is a multi-factorial degenerative joint disease that results in degradation and gradual loss of articular cartilage. Proteoglycan loss and alteration in the cartilage has been considered an important marker for detecting and measuring the progress of OA. The N
Sensitivity analysis and determination of free relaxation parameters for the weakly-compressible MRT-LBM schemes
It ha been proved that the lattice Boltzmann Methods (LBMs) are very efficient for computational fluid dynamics purposes, and for capturing the dynamics of weak acoustic fluctuations. Especially, the multi-relaxation-time lattice Boltzmann method (MRT-LBM) appears as a very robus
In-die evaluation of capping tendency of pharmaceutical tablets using force-displacement curve and stress relaxation parameter.
A novel in-die evaluation method of tablet capping tendency was proposed based on a force-displacement curve and stress relaxation parameter in a tableting process. In our previous study (Chem. Pharm. Bull., 59, 2011, Nakamura et al.), the phase diagram consisting of elastic reco
Fast relaxation parameter mapping from undersampled data
Introduction: The quantitative assessment of MR parameters like T1, T2, ADC, etc. requires the acquisition of multiple images of the same anatomy, which results in long scan times. However, these data can be described by a model with only a few parameters and in that sense they a
The optimal relaxation parameter for the SOR method applied to the Poisson equation in any space dimensions
The finite difference discretization of the Poisson equation with Dirichlet boundary conditions leads to a large, sparse system of linear equations for the solution values at the interior mesh points. This problem is a popular and useful model problem for performance comparisons
Optimal relaxation parameters of DRAMA (dynamic RAMLA) aiming at one-pass image reconstruction for 3D-PET.
We have reported a block-iterative algorithm named DRAMA for image reconstruction for emission tomography (Tanaka and Kudo 2003 Phys. Med. Biol. 48 1405-22). DRAMA is a modified version of the row-action maximum likelihood algorithm (RAMLA), in which the relaxation parameter is s
On the use of relaxation parameters in hybrid smoothers
The use of relaxation parameters in hybrid smoothers within algebraic multigrid (AMG) is analyzed both theoretically and practically. Relaxation parameters that are optimal under the assumptions of the theory are determined. The implementation of a procedure to automatically dete
The relationship between proton nuclear magnetic resonance relaxation parameters and myocardial perfusion with acute coronary arterial occlusion and reperfusion.
Previous investigators have demonstrated that acute myocardial ischemia, whether followed by reperfusion or not, is associated with prolongation of the proton nuclear magnetic resonance (NMR) relaxation times T1 and T2. Heretofore, the relationship between the severity of ischemi