-b,1 令(k+ e-b ∑ +1 f(=)= ∑5 f() 2l-(-by+5-b(=-by ∑ f(E 丌l 2i(-b)z b z b (z b) b l - - - = - < - - x x x 1 1 : 1, 2 ( ) ( ) ( ) ( ) ( ) å å -¥ =- + ¥ + = = + - - = - - = - - - × - - = 1 1 1 0 1 1 1 1 s s s k s k k k b z b z b b z b z b b x x x 令 f (z ) = ( ) ( ) ( ) ( ) ( ) ( ) ú û ù ê ë é × - - × - + - å ò å ò -¥ = - + ¥ = + 1 1 0 1 2 1 2 1 k k l k k k l k d z b b f d z b b f i x x x x x x p ( ) ( ) å ( ) ò ¥ = + × - - = 0 1 2 1 1 k k l k d z b b f i x x x p ( ) ( ) å ( ) ò -¥ = - + × - - + 1 1 2 2 1 k k l k d z b b f i x x x p