Laser & Optoelectronics Progress, Volume. 57, Issue 5, 053002(2020)
Quantitative Analysis of Liquid Steel Element in LIBS Using SVR Improved by Particle Swarm Optimization
Figures & Tables(10)
Table 1. Element composition of steel samples%
View tableTable 1. Element composition of steel samples%
Sample Fe Mn Ni Cr Si Cu Co P S ERM281-1 70.329 9.370 0.258 0.176 1.929 0.048 0.023 0.012 0.016 ERM282-1 67.150 10.860 0.475 1.109 0.734 0.086 0 0.019 0.004 ERM279-2 75.786 10.603 0.786 2.107 1.516 0.088 0 0 0 ERM284-2D 67.496 10.720 1.744 0.183 2.537 0.020 0.053 0.026 0.024 ERM287-1D 67.439 10.350 1.480 3.203 1.569 0.016 0.148 0.027 0.001 ERM289-1D 55.238 24.680 1.106 0.000 4.531 0.049 0.065 0.012 0.003 ERM292-1D 68.927 10.090 0.976 2.139 2.402 0.037 0.026 0.018 0.006 ERM295-1D 48.360 24.400 0.397 1.481 4.418 0.017 0.045 0.017 0.001 ERM296-1D 82.020 5.790 0.545 0.149 1.242 0.117 0.021 0.018 0.003 ERM298-1D 63.380 7.056 0.316 3.201 4.262 0.016 0.055 0.020 0.001
Table 2. Cumulative variance contribution of each influencing factor
View tableTable 2. Cumulative variance contribution of each influencing factor
Component number 1 2 3 4 5 6 7 8 9 Eigen value 9.674 7.861 5.349 3.245 0.934 0.761 0.670 0.511 0.239 Cumulative variance contribution /% 33.08 26.88 18.29 11.10 3.19 2.60 2.30 1.75 0.82
Table 3. Eigen vectors of principal components
View tableTable 3. Eigen vectors of principal components
Corrosion factor PC 1 PC 2 PC 3 PC 4 Peak intensity 0.967 0.377 0.654 0.385 Integrated intensity 0.019 0.392 -0.159 0.959 Signal-to-back ratio 0.069 0.818 0.041 -0.172 Internal standard corrected element concentration 0.507 0.068 0.882 -0.567 Pulse trigger delay /μs 0.297 0.014 0.148 0.069 Distance /mm 0.503 0.552 0.347 0.462 Spectral peak value -0.435 0.462 0.297 0.293 Spectral efficiency /% 0.514 -0.408 -0.502 0.377 Intensity of temperature thermal radiation /(J·cm-2·min-1) 0.205 -0.538 0.527 -0.151
Table 4. Regression prediction results for test set
View tableTable 4. Regression prediction results for test set
Element SVR model Cat-fish PSO-SVR model R2 RSD / % RMSE / % R2 RSD / % RMSE / % Mn 0.9102 6.10 3.34 0.9511 2.46 1.07 Ni 0. 9177 6.83 3.18 0.9627 3.17 0.97 Cr 0. 9174 9.52 4.07 0.9845 3.99 1.26 Si 0.9099 8.27 3.02 0.9522 4.50 1.43
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Youliang Yang, Lu Wang, Cuihong Ma. Quantitative Analysis of Liquid Steel Element in LIBS Using SVR Improved by Particle Swarm Optimization[J]. Laser & Optoelectronics Progress, 2020, 57(5): 053002
Paper Information
Category: Spectroscopy
Received: Jul. 8, 2019
Accepted: Aug. 28, 2019
Published Online: Mar. 5, 2020
The Author Email: Lu Wang (1099209804@qq.com)
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