Distinction strategies based on discriminant function analysis for particular steel grades at elevated temperature using stand-off LIBS

2016 ◽  
Vol 31 (11) ◽  
pp. 2242-2252 ◽  
Author(s):  
T. Delgado ◽  
J. Ruiz ◽  
L. M. Cabalín ◽  
J. J. Laserna
Keyword(s):  
Elevated Temperature ◽  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Function Analysis ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Steel Grades ◽  
Chemometric Tools

This work presents experimental discrimination strategies based on advanced chemometric tools for the differentiation of steel grades using stand-off laser-induced breakdown spectroscopy.

scholarly journals Quantitative Classification of Quartz by Laser Induced Breakdown Spectroscopy in Conjunction with Discriminant Function Analysis

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
A. Ali ◽  
M. Z. Khan ◽  
I. Rehan ◽  
K. Rehan ◽  
R. Muhammad
Keyword(s):  
Discriminant Function ◽  
Discriminant Function Analysis ◽  
Detection System ◽  
Function Analysis ◽  
Ambient Pressure ◽  
Laser Induced Breakdown Spectroscopy ◽  
Quantitative Classification ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

A responsive laser induced breakdown spectroscopic system was developed and improved for utilizing it as a sensor for the classification of quartz samples on the basis of trace elements present in the acquired samples. Laser induced breakdown spectroscopy (LIBS) in conjunction with discriminant function analysis (DFA) was applied for the classification of five different types of quartz samples. The quartz plasmas were produced at ambient pressure using Nd:YAG laser at fundamental harmonic mode (1064 nm). We optimized the detection system by finding the suitable delay time of the laser excitation. This is the first study, where the developed technique (LIBS+DFA) was successfully employed to probe and confirm the elemental composition of quartz samples.

Identification and classification of polymer e-waste using laser-induced breakdown spectroscopy (LIBS) and chemometric tools

2017 ◽  
Vol 59 ◽  
pp. 390-395 ◽  
Author(s):  
Vinicius Câmara Costa ◽  
Francisco Wendel Batista Aquino ◽  
Caio Marcio Paranhos ◽  
Edenir Rodrigues Pereira-Filho
Keyword(s):  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Chemometric Tools

At-line monitoring of continuous casting sequences of steel using discriminant function analysis and dual-pulse laser-induced breakdown spectroscopy

2017 ◽  
Vol 32 (6) ◽  
pp. 1119-1128 ◽  
Author(s):  
J. Ruiz ◽  
T. Delgado ◽  
L. M. Cabalín ◽  
J. J. Laserna
Keyword(s):  
Continuous Casting ◽  
Steel Surface ◽  
Function Analysis ◽  
Extreme Environment ◽  
Laser Induced Breakdown Spectroscopy ◽  
Steelmaking Process ◽  
Breakdown Spectroscopy ◽  
System P ◽  
Casting System ◽  
Laser Induced Breakdown

Among the several controlling routines utilized in the steelmaking process, analytical operations during continuous casting are especially demanding due to the extreme environment of steel plants and the crude conditions of the steel surface at the exit of the casting system.

Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20701
Author(s):  
Bo Li ◽  
Xiaofeng Li ◽  
Zhifeng Zhu ◽  
Qiang Gao
Keyword(s):  
Femtosecond Laser ◽  
Spatial Resolution ◽  
Laser Induced Breakdown Spectroscopy ◽  
Nanosecond Laser ◽  
Breakdown Threshold ◽  
Powerful Technique ◽  
Breakdown Spectroscopy ◽  
Continuous Radiation ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for quantitative diagnostics of gases. The spatial resolution of LIBS, however, is limited by the volume of plasma. Here femtosecond-nanosecond dual-pulsed LIBS was demonstrated. Using this method, the breakdown threshold was reduced by 80%, and decay of continuous radiation was shortened. In addition, the volume of the plasma was shrunk by 85% and hence, the spatial resolution of LIBS was significantly improved.

Diagnoses Generated by Numerical Taxonomic Methods Applied to Standard Blood Variables

1980 ◽  
Vol 19 (04) ◽  
pp. 205-209
Author(s):  
L. A. Abbott ◽  
J. B. Mitton
Keyword(s):  
Liver Cirrhosis ◽  
Renal Disease ◽  
Principal Components Analysis ◽  
Discriminant Function ◽  
Principal Components ◽  
Discriminant Function Analysis ◽  
Chronic Renal Disease ◽  
Function Analysis ◽  
Infectious Hepatitis ◽  
Components Analysis

Data taken from the blood of 262 patients diagnosed for malabsorption, elective cholecystectomy, acute cholecystitis, infectious hepatitis, liver cirrhosis, or chronic renal disease were analyzed with three numerical taxonomy (NT) methods : cluster analysis, principal components analysis, and discriminant function analysis. Principal components analysis revealed discrete clusters of patients suffering from chronic renal disease, liver cirrhosis, and infectious hepatitis, which could be displayed by NT clustering as well as by plotting, but other disease groups were poorly defined. Sharper resolution of the same disease groups was attained by discriminant function analysis.

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