基于分数阶微分的土壤全氮高光谱反演

陈昊宇, 项磊, 高贺, 牟金燚, 索晓晶, 滑博伟

Hyperspectral inversion of total nitrogen content in soils based on fractional order differential

CHEN Haoyu, XIANG Lei, GAO He, MU Jinyi, SUO Xiaojing, HUA Bowei

表5 BP神经网络预测模型

Tab.5 BP neural network prediction model

阶数① 建模集 验证集 RPD R2 RMSE R2 RMSE 0 0.58 0.25 0.58 0.31 1.06 1 0.66 0.23 0.64 0.22 1.50 1.1 0.75 0.16 0.71 0.16 2.06 1.2 0.74 0.19 0.65 0.23 1.43 1.3 0.73 0.19 0.56 0.21 1.57 1.4 0.75 0.45 0.51 0.31 1.06 1.5 0.69 0.22 0.58 0.3 1.10 1.6 0.75 0.20 0.53 0.31 1.06 1.7 0.69 0.47 0.63 0.28 1.18 1.8 0.60 0.25 0.63 0.29 1.14 1.9 0.54 0.26 0.37 0.33 1.00 2 0.53 0.26 0.46 0.32 1.03