Method for analyzing asymmetric clusters in spectral analysis

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364497, G06F 1542, G06F 1520

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051249324

ABSTRACT:
The multiple linear regression approach typically used in near-infrared spectrometry yields equations in which any amount of reflectance at the analytical wavelengths leads to a corresponding composition value. As a result, when the sample contains a component not present in the training set, erroneous composition values can arise without any indication of error. There is described a method of detecting "false" samples by constructing a multi-dimensional form in space using reflectance values of samples in a training set at a number of wavelengths. A new sample is projected into this space and a confidence test is executed to determine whether the new sample is part of the population from which the training set was drawn. The method relies on few assumptions about the structure of the data; therefore, deviations from assumptions do not affect the results of the confidence test.

REFERENCES:
patent: 4286327 (1981-08-01), Rosenthal et al.
patent: 4399361 (1983-08-01), Zanzucchi et al.
patent: 4466076 (1984-08-01), Rosenthal
patent: 4496839 (1985-01-01), Bernstein et al.
patent: 4540282 (1985-09-01), Landa et al.
patent: 4633087 (1986-12-01), Rosenthal et al.
patent: 4652756 (1987-03-01), Ryan et al.
patent: 4692620 (1987-09-01), Rosenthal
patent: 4742228 (1988-05-01), Bischoff
patent: 4785184 (1988-11-01), Bien et al.
patent: 4893253 (1990-01-01), Lodder
"Detection of Subpopulations in Near-Infrared Reflectance Analysis", Lodder et al., (Nov. 1988), Applied Spectroscopy, vol. 42, No. 8; pp. 1500-1511.
R. Lodder, "Solving the False Sample Problem in Near-Infrared Reflectance Analysis", University Microfilms, 1988.
R. Lodder et al., "Detection of Capsule Tampering by Near-Infrared Reflectance Analysis", Anal. Chem., 59(15):1921-1930 (1987).
E. Ciurczak et al., "Identification of Actives in Multicomponent Pharmaceutical Dosage Forms Using Near-Infrared Reflectance Analysis", Spectroscopy, 1(1):36-39 (Jan. 1986).
D. Burns, "Letter to the Editor", Spectroscopy, 1(3):10 (Mar. 1986).
E. Ciurczak et al., "Determination of Particle Size of Pharmaceutical Raw Materials Using Near-Infrared Reflectance Spectroscopy", Spectroscopy, 1(7):36-39 (Jul. 1986).
C. Watson, "Near-Infrared Reflectance Spectrophotometric Analysis of Agricultural Products", Anal. Chem., 49(9):835A-840A (Aug. 1977).
D. L. Wetzel, "Near-Infrared Reflectance Analysis, Sleeper Among Spectroscopic Techniques", Anal. Chem., 55(12):1165-1172 (1983).
B. W. Hadzija et al., "Simple Techniques to Detect and Identify Phentermine Adulteration", Forensic Sci. Int'l, 23:143-147 (1983).
B. Efron, "Nonparametric Estimates of Standard Error: The Jackknife, The Bootstrap and Other Methods", Biometrika, 68 (3):589-599 (1981).
H. L. Mark et al., "Qualitative Near-Infrared Reflectance Analysis Using Mahalanobis Distances", Anal. Chem., 57:1449.sub.]1456 (1985).
H. L. Mark, "Normalized Distances for Qualitative Near-Infrared Reflectance Analysis", Anal. Chem., 58:379-384 (1986).
D. E. Honigs et al., "Number of Samples and Wavelengths Required for the Training Set in Near-Infrared Reflectance Spectroscopy", Appl. Spectr., 38(6):844-847 (1984).
D. E. Honigs et al., "Near-Infrared Spectrophotometric Methods Development with a Limited Number of Samples: Application of Carbonate in Geological Samples", Appl. Spectr., 39(6):1062-1065 (1985).
R. A. Lodder, "Quantile BEAST Attacks the False-Sample Problem in Near-Infrared Reflectance Analysis", Unpublished Manuscript.

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