Study on NPLS Model with Three-Dimensional Hyperspectrum for Assessing Per-Mu-Yield of Winter Wheat
WANG Tao1, ZHANG Lu-da1*, LAO Cai-lian2, ZHAO Long-lian2, LI Jun-hui2, WANG Zhong-yi2,HUANG Wen-jiang3, WANG Ji-hua3, YAN Yan-lu2
1. College of Science, China Agricultural University, Beijing 100094, China 2. College of Information and Electrical Engineering, China Agricultural University, Beijing 100094, China 3. Beijing Agriculture Information Technology Research Center, Beijing 100089, China
摘要： 以35个实验小区，8个生育期的冬小麦田间测量冠层反射高光谱组成三维数据信息阵，采用多维偏最小二乘(multiway partial least squares, NPLS)算法建立了冬小麦亩产量估产模型。模型用于对13个实验小区产量预测分析，预测值与实际值的相关系数ｒ为0.936 6， 平均相对误差为4.44%，说明模型的预测效果较好，对实际的估产工作有一定的指导意义。
关键词：三维高光谱;NPLS模型;小麦估产
Abstract：The present study piled a cube array with the winter wheat’s cap reflection hyperspectra sampled from 35 experimental districts during 8 growth periods, and then used a multiway partial least squares (NPLS) algorithm to establish a model to assess the per-mu-yield of winter wheat. The model was used to predict the per-mu-yields of other 13 experimental districts. The correlation coefficient of predicted and actual values was 0.936 6, and the mean relative error was 4.44%. These results showed a good prediction of the model. The study has guiding meaning to actual yield assessment.
Key words：Three-dimensional hyperspectrum;NPLS model;Product assessment of winter wheat
王韬1,张录达1*,劳彩莲2,赵龙莲2,李军会2,王忠义2，黄文江3,王纪华3,严衍禄2 . 三维高光谱NPLS模型用于冬小麦估产的初步研究[J]. 光谱学与光谱分析, 2006, 26(10): 1915-1917.
WANG Tao1, ZHANG Lu-da1*, LAO Cai-lian2, ZHAO Long-lian2, LI Jun-hui2, WANG Zhong-yi2,HUANG Wen-jiang3, WANG Ji-hua3, YAN Yan-lu2 . Study on NPLS Model with Three-Dimensional Hyperspectrum for Assessing Per-Mu-Yield of Winter Wheat. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(10): 1915-1917.
