Zobrazeno 1 - 10
of 179
pro vyhledávání: '"BRUCE R. KOWALSKI"'
Autor:
Bruce R. Kowalski, Chris L. Stork
Publikováno v:
Chemometrics and Intelligent Laboratory Systems. 48:151-166
While multivariate calibration has been successfully employed in the monitoring of chemical processes, difficulties arise in that sensors are inherently prone to drift and processes are susceptible to unmodeled upsets. Having detected an unmodeled so
Publikováno v:
Journal of Chromatography A. 849:71-85
A number of preprocessing methods are tested on liquid chromatography–mass spectrometry (LC–MS) peptide map data, to determine the best and most efficient way to improve the signal to noise ratio in the data, especially at low analyte concentrati
Autor:
Bruce R. Kowalski, Chris L. Stork
Publikováno v:
Chemometrics and Intelligent Laboratory Systems. 46:117-131
The ability to differentiate between process upsets and sensor malfunctions is crucial in the monitoring of a chemical process as different compensatory responses are required. Process upsets threaten the quality of the chemical product and may requi
Publikováno v:
Analytical Chemistry. 71:1093-1099
A parallel gas chromatographic instrument with time-of-flight mass spectrometric detection (GC/TOF-MS) is reported. An injected sample is first split between two GC columns that provide complementary separations. The effluent from the two columns is
Publikováno v:
Journal of Microcolumn Separations. 11:97-107
Second-order data such as those provided by hyphenated instruments like gas chromatography with mass spectrometry detection (GC/MS) provide a wealth of information. Multichannel detection combined with multivariate analysis allows compounds that have
Publikováno v:
Applied Spectroscopy. 52:1348-1352
An automated method integrating wavelet processing and techniques from multivariate statistical process control (MSPC) is presented, providing a means for the simultaneous localization, detection, and identification of disturbances in spectral data.
Publikováno v:
Analytical Chemistry. 70:218-225
Chemical analysis using second-order data collected on hyphenated instruments has proven advantages over first-order or zero-order techniques due to what is known as the second-order advantage. The primary second-order advantage is the ability to per
Publikováno v:
Analytical Chemistry. 69:5031-5036
A novel, automated method based on principal component analysis is presented for the detection and identification of disturbed sensors during a process monitoring application. As opposed to previous approaches, which are capable of identifying a faul
Publikováno v:
Journal of Chemometrics. 11:419-461
The subject of analytical figures of merit for tensorial calibration is critically reviewed. Tensorial calibration derives its name from tensor algebra, which provides a classification of calibration methods depending on the complexity of the data ob
Publikováno v:
Chemometrics and Intelligent Laboratory Systems. 38:89-93
In a recent paper Kalivas and Lang state that Lorber's multivariate sensitivity only relates to the unscaled variance inflation factor if the number of calibration samples equals the number of analytes i.e. if pure-component spectra are used to form