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Position: Home > Articles > Predictions of corn product in Rizhao Hubei Agricultural Sciences 2019 (5) 101-103

日照市玉米产量的预测模型构建

作  者:
李长军;李秀珍;石军;葛倩;朱秀红
单  位:
山东建筑大学理学院;山东省气象信息中心;山东省五莲县气象局
关键词:
玉米产量;多元线性回归;灰色模型;日照市
摘  要:
基于山东省日照市的玉米产量资料和相关气象资料,利用逐步回归和灰色理论进行了玉米产量的预测模型构建。利用MATLAB软件建立多元线性回归方程Q′=-20 175+116X1-54 944X2-4 218X3+148X4+616X5+279X6-91 735X7+12 806X8,方程通过显著水平0.05检验,预测出的1998—2008年产量误差幅度在0.5%~3.6%,预测精度较高;利用灰色系统理论,对GM(1,N)灰色预测模型加以改进,预测出的1994—2006年产量误差幅度在1.4%~16.6%,预测的精度在90%左右,效果较好。
译  名:
Predictions of corn product in Rizhao
作  者:
LI Chang-jun;LI Xiu-zhen;SHI Jun;GE Qian;ZHU Xiu-hong;Shandong Province Meteorological Information Center;School of Science,Shandong Jianzhu University;Shandong ProvinceWulian County Meteorological Bureau;
单  位:
LI Chang-jun%LI Xiu-zhen%SHI Jun%GE Qian%ZHU Xiu-hong%Shandong Province Meteorological Information Center%School of Science,Shandong Jianzhu University%Shandong ProvinceWulian County Meteorological Bureau
关键词:
maize yield;;multiple linear regression;;GM model;;Rizhao city
摘  要:
Based on the corn yield data and related meteorological data of Rizhao City,the prediction model of corn yield was constructed by stepwise regression and grey theory. Using MATLAB software to establish a multivariate linear regression equation,the equation is predicted by the significant level of 0.05, the predicted yield error of 1998-2008 is 0.5%~3.6%,and the prediction accuracy is high; using gray system theory, GM(1,N) The grey prediction model is improved. The predicted output error range from 1994 to 2006 is 1.4%~16.6%,and the predicted accuracy is about 90%. The effect is better.

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