Open AccessCombination of inversion and fitting as an effective method for the analysis of NMR relaxation data
Author(s) -
Wei He,
Gengying Li
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.1431
Subject(s) - relaxation (psychology) , computation , experimental data , nonlinear system , non linear least squares , inversion (geology) , sample (material) , computer science , least squares function approximation , curve fitting , nuclear magnetic resonance , statistical physics , materials science , algorithm , estimation theory , physics , thermodynamics , mathematics , statistics , quantum mechanics , psychology , social psychology , paleontology , structural basin , estimator , machine learning , biology
A method is proposed for analyzing the NMR relaxation data. The procedure includes using the nonnegative leastsquares (NNLS) to determine roughly the relaxation time values. Then those values are used as the initial parameters of the nonlinear fitting computation. As a result, accurate relaxation time data can be conveniently obtained without any preknowledge of the sample. This method is verified and demonstrated by computer simulations and NMR experimental results.