Browsing by Author "Li, Keh-Tsong"

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Predictor design of a novel Grey model PGM21 using pseudo second-order information
(2006-06-01)
Li, Keh-Tsong
;
Chen, Yon-Ping
;
電控工程研究所
;
Institute of Electrical and Control Engineering
A novel grey model, called pseudo-GM(2, 1) or PGM21 for simplicity, is developed to improve the prediction accuracy for a non-monotone sequence by modifying the GM(1,1) model with a remedial term. Since the remedial term consists of two development coefficients, it can be treated as a kind of second-order information, called the pseudo second-order information in this paper. With the remedial term, the PGM21 only costs a little higher computation time than the original GM(1,1) model; however, its prediction accuracy is highly increased. The important features of the PGM21 are demonstrated by numeric simulation results.