کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4719649 1639194 2007 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Using non-negative matrix factorization in the “unmixing” of diffuse reflectance spectra
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
Using non-negative matrix factorization in the “unmixing” of diffuse reflectance spectra
چکیده انگلیسی

Diffuse reflectance spectrophotometry (DRS), often termed simply color scanning, is a technique applied commonly to marine sediments to provide records of compositional variations. Measured DRS spectra, however, represent the bulk response of a sediment's constituents and are therefore difficult to interpret in their raw form. A quantification technique will be proposed and discussed which approaches the analysis of DRS data sets as a linear mixing problem and applies a non-negative matrix factorization (NMF) algorithm in their decomposition. The presented methodology allows the spectra of the end-member sediment constituents and their fractional abundances to be determined using only the measured data set. Unlike other DRS data processing techniques, NMF only allows additive combinations of end-members to explain the data set and will therefore return only positive abundances. Analysis of sediments from the eastern Mediterranean Sea demonstrates the applicability of the NMF approach and the new method of Orbital Cycle Stacking establishes that the “unmixed” data is consistent with expected environmental change.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Geology - Volume 241, Issues 1–4, 25 June 2007, Pages 63–78
نویسندگان
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