E. Sanchez, L.S. Ramos and B.R. Kowalski, Generalized rank annihilation method. I. Application to liquid chromatography-diode array ultraviolet detection data. J. Chromatog., 385... [Pg.305]

Chemometric methods can greatly increase the number of analyzable peaks in MDLC in particular, the generalized rank annihilation method (GRAM) can quantify overlapping peaks by deconvoluting the combined signal to those of each dimension. Standards with precise retention time are required, and there must be some resolution in both dimensions [60,61]. [Pg.110]

Windig, W. and Antalek, B., Direct exponential curve resolution algorithm (Decra) — a novel application of the generalized rank annihilation method for a single spectral mixture data set with exponentially decaying contribution profiles, Chemom. Intell. Lab. Syst., 1997, 37, 241-254. [Pg.262]

Three-way calibrations methods, such as the generalized rank annihilation method (GRAM) and parallel factor analysis (PARAFAC), are becoming increasingly prevalent tools to solve analytical challenges. The main advantage of three-way calibration is estimation of analyte concentrations in the presence of unknown, uncalibrated... [Pg.475]

An alternative method to solving Equation 12.3 is to reduce both Rj and R2 to square, nonsingular, nonidentity matrices by projecting each matrix independently onto the space formed jointly by the two matrices. This permits calculation of A and F, via the QZ algorithm [23] and, by extension, relative concentration estimates, Z, and estimates of the true underlying factors in the X- and Y-ways. This is known as the generalized rank annihilation method (GRAM) [24, 25],... [Pg.485]

Li, S. and Gemperline, P.J., Generalized rank annihilation method using similarity transformations, Anal. Chem., 64, 599-607, 1992. [Pg.501]

Generalized Rank Annihilation Method as per Wilson, Sanchez, and Kowalski. %INPUT... [Pg.502]

The basic theory behind the generalized rank annihilation method is that the rank reduction can be re-expressed and automated. A scalar y (relative concentration of the analyte in the unknown sample) is sought such that the matrix pencil... [Pg.139]

A practical numerical issue in the use of the generalized rank annihilation method is that, at certain times, complex-valued solutions may arise. Means have been provided, though, for eliminating this problem by simple similarity transformations [Faber 1997, Li et al. 1992],... [Pg.142]

Given an array X of size I x J x K, two slices in, say, the third mode are needed in order to be able to use the generalized rank annihilation method. These may be formed as weighted averages of all the slices. A sensible way to define two such samples is to determine two slices that preserve the total variation in X maximally in a least squares sense. Additionally these two slices must be within an I -dimensional subspace (R is the number of components in the PARAFAC model) in the first and second mode in order to maximize directly the appropriateness of the span of the data matrices. Thus, two slices Gi and G2 of size R x R are sought such that these are representative of the variation in X. This may be accomplished in a least squares sense by fitting a Tucker3 model with dimensionality R x R x 2,... [Pg.143]

The basic principle of the generalized rank annihilation method has been (re-)invented several times, e.g., in signal processing under the name ESPRIT [Roy Kailath 1989] and... [Pg.143]

Generalized Rank Annihilation Method... [Pg.346]

Booksh KS, Kowalski BR, Error analysis of the generalized rank annihilation method, Journal of Chemometrics, 1994, 8, 45-63. [Pg.352]

Faber NM, Lorber A, Kowalski BR, Generalized rank annihilation method Standard errors in the estimated eigenvalues if the instrumental errors are heteroscedastic and correlated, Journal of Chemometrics, 1997,11, 95-109. [Pg.355]

Li SS, Gemperline PJ, Briley K, Kazmierczak S, Identification and quantitation of drugs of abuse in urine using the generalized rank annihilation method of curve resolution, Journal of Chromatography B-Biomedical Applications, 1994, 655, 213-223. [Pg.361]

Ramos S, Sanchez E, Kowalski B, Generalized rank annihilation method. II. Analysis of bimodal chromatographic data, Journal of Chromatography, 1987, 385, 165-180. [Pg.364]

© 2019 chempedia.info