ux, t=F-li(o, t) Fl(0)0 +∫FV(o:0 而dk=F()+F-」 f(o, t e a2o2(-r)=F x,)*F F a ot dx 2兀 cos a tdx 丌u(x t) F [u ( ,t)] ~ , 1 w - = [ ( ) ] a t F e 2 2 1 ~ w j w - - = ( ) ( ) [ ] ò - - - + t a t F f e d 0 1 2 2 , ~ w t t w t [ ] ò ¥ - ¥ - - - F e = e e dx a w t a w t iw t p 2 2 2 2 2 1 1 ( ) [ ( ) [ ]] a t a t e F x F e 2 2 2 2 ~ w 1 w j w j - - - 而 = * ( ) ( ) ( ) ( ) [ [ ]] w t w t w t t - - - - - = * a t a t f e F f x F e 2 2 2 2 1 , , ~ ò ¥ - = 0 cos 1 2 2 e tdx a t w p w