改写为算子方程 rt Z ”r0p0 ap”+anpm1++ap+a0 =p"pb() ()=hf()h.di d"f改写为算子方程 ( ) ( ) ( ) ( ) ( ) ò = º = = L L , 1 , , , f t f t dt p dt d f p f t dt df t pf t dt d p m m m ( ) ( ) (b p b p b p b )f ( )t a p a p a p a i t n n n n m m m m 1 0 1 1 1 0 1 1 = + + + + + + + + - - - - L L ( ) ( ) r r r dt d f h dt df i t = h1 f t + h2 +L+ +1