Zou Hongbo

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A modified GM(1,1) model is constructed by producing new data sequence with the method of transforming every datum of raw data sequence into its n-th root. It is demonstrated that the property of the modified GM(1,1) model is superior to GM(1,1) model by numerical experiment. Moreover the modified model is applied in the prediction of fruit price index in(More)
In this paper, the properties of the GM(1,1) model and the direct GM(1,1) model are studied .The fact that both the GM(1, 1) model and the direct GM(1,1) model are biased exponential models is shown, and the characteristics of the deviation of the two models are analyzed. Therefore, the essence of the error of the GM(1,1) model and the direct GM(1,1) model(More)
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