]-发)-o-w0]-[er-]o 鉴-a]oroar+ro6]ar-roaar-0 [发j-a]Foo+nrin-nko5-0 ∫rFr)Er)dr=- RIE(R)F(R)-(R)E2(R) -a2 55 2 ( ) 2 2 1 2 2 1 2 d d d ( ) d ( ) ( ) 0, ( ) 0 d d d d n F r F r m n n r r F r r a r F r r r R r r r r                                        2 ( ) 2 1 2 1 2 2 1 0 0 0 d d d ( ) d ( ) ( ) ( )d ( ) d ( ) d 0 d d d d n R R R m F r F r a rF r F r r F r r r F r r r R r r r r                                   2 ( ) 2 1 2 2 1 0 1 2 0 ( ) ( )d { [ ( ) ( ) ( ) ( )]} 0 n R m R a rF r F r r r F r r F r r F F R                       2 1 1 2 1 2 2 0 ( ) 2 [ ( ) ( ) ( ) ( )] ( ) ( )d R n m R F R R F R R F F rF r F r r a R              