f function X32 48 E E(X)48 B l(1-6) B 2(7-12) B B B 5 B B 8(42-48) Cu(1-4) C2 C3 C4 Cs C6 C7 C8(28-32) f×,k)2 1616 f function x 32 E E(x)48 ki 48 B1(1-6) f(x, ki )32 S1 C1(1-4) B2(7-12) S2 C2 B3 S3 C3 B4 S4 C4 B5 S5 C5 B6 S6 C6 B7 S7 C7 B8(42-48) S8 C8(28-32) + P