(Wang Y N, Liu K D, Li Y C. GM(1,1) modeling method of optimum the whitening values of grey derivative[J]. Systems Engineering-Theory&Practice, 2001, 21(5): 124-128.)
(Tan G J. The structure method and application of background value in grey system GM(1,1) model[J]. Systems Engineering-Theory & Practice, 2000, 20(4): 99-103.)
(Luo D, Liu S F, Dang Y G. The optimization of grey model GM(1,1)[J]. Chinese Engineering Science, 2003, 5(8): 50-53.)
[17]
Wang Z X, Dang Y G, Liu S F. The optimization of background value in GM(1,1) model[J]. J of Grey System, 2007, 10(2): 69-74.
[18]
Lin Y H, Lee P C, Chang T P. Adaptive and highprecision grey forecasting model[J]. Expert Systems with Applications, 2009, 36(6): 9658-9662.
[19]
Dang Y G, Liu S F. The GM models that ??(??) be taken as initial value[J]. Kybernetes, 2004, 33(2): 247-255.
[20]
Xie N M, Liu S F. Discrete grey forecasting model and its optimization[J]. Applied Mathematical Modelling, 2009, 33(2): 1173-1186.
[21]
Wang Y H, Dang Y G, Liu S F. An approach to increase prediction precision of GM(1,1) model based on optimization of the initial condition[J]. Expert Systems with Applications, 2010, 37(8): 5640-5644.
[22]
Deng Ju-long. A novel GM(1,1) model for nonequigap series[J]. J of Grey System, 1997, 9(2): 111-115.
(Shi X R, Wang Z L, Zhang Z D. GM(1,1) model with variational parameter for non-equidistant sequence and its application[J]. J of Mathematics in Practice & Theory, 2006, 36(6): 216-220.)
[25]
Wang F X. Improvement on unequal interval gray forecast model[J]. Fuzzy Information and Engineering, 2006, 6(1): 118-123.
(Wang Y M, Dang Y G, Wang Z X. The optimization of background value in non-Equidistant GM(1,1) model[J]. Chinese J of Management Science, 2008, 16(4): 159-162.)
(Luo Y X. Non-equidistant step by step optimum new information GM(1,1) and its application[J]. Systems Engineering-Theory & Practice, 2010, 30(12): 2254-2258.)
