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Title: System for identifying known materials within a mixture of unknowns

Abstract

One or both of two methods and systems are used to determine concentration of a known material in an unknown mixture on the basis of the measured interaction of electromagnetic waves upon the mixture. One technique is to utilize a multivariate analysis patch technique to develop a library of optimized patches of spectral signatures of known materials containing only those pixels most descriptive of the known materials by an evolutionary algorithm. Identity and concentration of the known materials within the unknown mixture is then determined by minimizing the residuals between the measurements from the library of optimized patches and the measurements from the same pixels from the unknown mixture. Another technique is to train a neural network by the genetic algorithm to determine the identity and concentration of known materials in the unknown mixture. The two techniques may be combined into an expert system providing cross checks for accuracy. 37 figs.

Inventors:
Issue Date:
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6303240
Patent Number(s):
5926773 A
Application Number:
PPN: US 8-958099
Assignee:
Sandia Corp., Albuquerque, NM (United States) SNL; EDB-99-085456
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Patent File Date: 27 Oct 1997
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; ALGORITHMS; CONCENTRATION RATIO; DATA ANALYSIS; EXPERT SYSTEMS; MULTIVARIATE ANALYSIS; NEURAL NETWORKS; QUANTITATIVE CHEMICAL ANALYSIS; SPECTROSCOPY; CHEMICAL ANALYSIS; MATHEMATICAL LOGIC; MATHEMATICS; STATISTICS; 400102* - Chemical & Spectral Procedures; 990200 - Mathematics & Computers

Citation Formats

Wagner, J.S. System for identifying known materials within a mixture of unknowns. United States: N. p., 1999. Web.
Wagner, J.S. System for identifying known materials within a mixture of unknowns. United States.
Wagner, J.S. Tue . "System for identifying known materials within a mixture of unknowns". United States.
@article{osti_6303240,
title = {System for identifying known materials within a mixture of unknowns},
author = {Wagner, J.S.},
abstractNote = {One or both of two methods and systems are used to determine concentration of a known material in an unknown mixture on the basis of the measured interaction of electromagnetic waves upon the mixture. One technique is to utilize a multivariate analysis patch technique to develop a library of optimized patches of spectral signatures of known materials containing only those pixels most descriptive of the known materials by an evolutionary algorithm. Identity and concentration of the known materials within the unknown mixture is then determined by minimizing the residuals between the measurements from the library of optimized patches and the measurements from the same pixels from the unknown mixture. Another technique is to train a neural network by the genetic algorithm to determine the identity and concentration of known materials in the unknown mixture. The two techniques may be combined into an expert system providing cross checks for accuracy. 37 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {7}
}