Qidong Zhao, Xiangyu Ge, Jianli Ding, Jingzhe Wang, Zhenhua Zhang, Meiling Tian. Combination of Fractional Order Differential and Machine Learning Algorithm for Spectral Estimation of Soil Organic Carbon Content[J]. Laser & Optoelectronics Progress, 2020, 57(15): 153001
- Laser & Optoelectronics Progress
- Vol. 57, Issue 15, 153001 (2020)
Fig. 1. SOC content statistics
Fig. 2. Spectral reflectance curves of soil with different organic carbon content
Fig. 3. Number of bands whose correlation coefficient passes significance test level of 0.01
Fig. 4. Thermal map of correlation coefficient between SOC content and different orders at each bands
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Table 1. Simulation results of ELM modeling algorithm
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Table 2. Simulation results of RF modeling algorithm
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Table 3. Simulation results of MARS modeling algorithm
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Table 4. Simulation results of Elastic Net modeling algorithm
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Table 5. Simulation results of GBRT modeling algorithm
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Table 6. Comparison of effects of different bands on molecular chemical bonds in soil
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