经济颖测方 累减生成 例x(K)={28.526865289,19752839402453.296510} 令K=0,X1(0)=0 K=1X1(1)=X(1)+X0(0)=228-0=228 K=2X(2)=X(2)+X(1)=526-2.28=298 K=3X(3)=X(3)+X(2)=865-526=339 K=4X(4)=X(4)+X(3)=1289-865=424 K=5X(5)=X(5)+X0(4)=19.75-12.89=686 K=6X(6)=X(6)+X0(5)=28.39-1975=864 K=7X(7)=X(7)+X(6)=40.24-2839=11.85 K=8X(8)=X(8)+X(7)=5239-4024-=12.5 K=9x(9)=X1(9)+X(9)=6510-5329=12.71 累计生成序列 X(K)={289833942468686411852.1527}经济预测与决策方法 累减生成 例 ( ) 2.28,5.26,8.65,12.89,19.75,28.39,40.24,53.29,65.10 0 X K = 令K＝0，X 1 (0)=0 9 (9) (9) (9) 65.10 53.29 12.71 8 (8) (8) (7) 52.39 40.24 12.15 7 (7) (7) (6) 40.24 28.39 11.85 6 (6) (6) (5) 28.39 19.75 8.64 5 (5) (5) (4) 19.75 12.89 6.86 4 (4) (4) (3) 12.89 8.65 4.24 3 (3) (3) (2) 8.65 5.26 3.39 2 (2) (2) (1) 5.26 2.28 2.98 1 (1) (1) (0) 2.28 0 2.28 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 1 1 0 ＝ ＝ ＝ ＝ ＝ ＝ ＝ = = + = − = = + = − = = + = − = = + = − = = + = − = = + = − = = + = − = = + = − = = = + = − = K X X X K X X X K X X X K X X X K X X X K X X X K X X X K X X X K X X X 累计生成序列 ( ) 2.28,2.98,3.39,4.24,6.86,8.64,11.85,12.15,12.71 1 X K =