Nondestructive and rapid grading of tobacco leaves by use of a hand-held near-infrared spectrometer, based on a particle swarm optimization-extreme learning machine algorithm

2020 ◽  
Vol 53 (9) ◽  
pp. 685-691
Author(s):  
Ruidong Li ◽  
Xiaobing Zhang ◽  
Keqiang Li ◽  
Junfeng Qiao ◽  
Yong Wang ◽  
...  
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