“…First, GM(1,1)-P and NGM(1,1)-P are set up by equidistant and non-equidistant sequences, respectively. Next, instead of 1-AGO, = ( x (1) ( t 1 ), x (1) ( t 2 ),…, x (1) ( t n )) = ( , ,…, ) for NGM(1,1)-P can be generated by the following AGO as (Dang et al, 2016 ; Liu et al, 2017 ) …”