The urban Grey dynamic model,based on the mortality data from 1990 to 1999,was established as t= -106.481 7 ×(1-e 0.074 58 t )-Y t-1 (t=1,2, ... ,n) ,and the rural model was t= -33.605 3 ×(1-e 0.075 37t )-Y t-1 (t=1,2, ... ,n) .
The correlation of food yield and land irrigation water has been studied in this paper based on the grey correlation analysis and the grey dynamic model of the grey system theory. The analysis method can be used for finding the factors of effecting food yield and providing basis for making agricultural decisions.
The food production has been studied and analysed and predicted by means of grey correla-tion analysis and the grey dynamic model of the grey sy5tem theory. The analysis method and theprediction method can be used to find out the factors effecting food production and to provide asound basis for making agricultural decisions.
By using GIS and the method of landscape ecology,land use type pattern in 2001 of Yidou County,Hubei Province are studied. At the same time,tendencies of land use structure in 2010,2015 are predicted by linking land use changing survey data for 1999,2000,2002,2003 and using general grey dynamic model.
The development of stock exchange simulation prediction modeling by a hybrid grey dynamic model
The RGM(1,3) model is modified to promote the forecasting accuracy of predicting values using the residual grey dynamic model GM(1,1).
This paper presents a residual modified grey dynamic model RGM(1,3) in order to fit and predict the performance characteristics of an electro-conductive ceramic (Al2O3+30%TiC) during electrical discharge machining (EDM).
The grey dynamic model is first combined with the transfer function to predict the leaching rate in heap leaching process.
Prediction of leaching rate in heap leaching process by grey dynamic model GDM(1,1)