-6u.- 安)2.e%6 ).-)-o J0:m=0时，自然为0：m≠0时，J0=0 24 mJ2(0)=0 = 6+2-:6) (小(aa-(a g-gaa+.(a 2828 ( ) ( ) ( ) ( ) 0 0 2 2 2 2 2 ' 2 0 0 0 0 1 1 2 2 2 x x m n m m m n n n d m N x J x xJ x d J x    dx = + −           ( ) ( ) ( ) 0 0 2 2 2 2 ' 2 0 0 0 0 1 1 2 2 2 x x m m m n n n m x J x xJ x J x    = + −     ( ) ( ) ( ) ( ) 2 2 2 2 2 ' 2 2 0 0 0 0 0 1 1 0 . 2 2 2 m m m m n n n m x J x x J x J x J    = + − −         ( ) 2 2 0 : 2 m n m J  m = 0时，自然为0；m  0时，Jm(0) = 0. ( ) 2 2 0 0 2 m n m J  = ( ) ( ) ( ) ( ) 2 2 2 2 2 2 ' 2 0 0 0 0 0 1 1 2 2 2 m n m m m n n n m N x J x x J x J x    = + −     ( ) ( ) ( ) 2 2 2 2 2 ' 2 0 0 0 0 0 1 1 2 2 2 n m n n m n m n n n n m           J J J    = + −     ( ) ( ) 2 2 2 2 2 ' 0 0 0 0 1 1 2 2 m n m n n m       J J    = − +        