ax,)=[p(x+am)+(x-m】+2a[”w(s)k-∫w(sk] (x()ds 6Hz M 5Hz AAAAAU WMA6     1 1 ( , ) ( ) ( ) 2 2 x at x at u x t x at x at s ds s ds a                             1 1 ( ) ( ) ( ) 2 2 x at x at x at x at s ds a           