Zeng, Kefang; Wei, Yong Optimizing GM(1,1) model based on grey derivative and prediction coefficient. (Chinese. English summary) Zbl 1313.93024 Acta Anal. Funct. Appl. 16, No. 1, 36-39 (2014). MSC: 93A30 62M20 PDFBibTeX XMLCite \textit{K. Zeng} and \textit{Y. Wei}, Acta Anal. Funct. Appl. 16, No. 1, 36--39 (2014; Zbl 1313.93024)
Hu, Dahong; Wei, Yong Applicability of grey model to the monotonic decreasing sequences and the estimate of parameters. (Chinese. English summary) Zbl 1199.93009 Syst. Eng. Electron. 30, No. 11, 2199-2203 (2008). MSC: 93A15 93A30 62F12 PDFBibTeX XMLCite \textit{D. Hu} and \textit{Y. Wei}, Syst. Eng. Electron. 30, No. 11, 2199--2203 (2008; Zbl 1199.93009)