u(x,t)=F(i(@,t)) -r'(oe)+r(oe一) +=(eoem)--) 应用延迟定理 F(p(x±at))=ekjouF(p(x)=etio" p() F-1(ejo"p(o))=p(x±t) r()-v) F-(ooe」"(o)h 55 1 1 j 1 j 1 j 1 j ( , ) ( , ) ˆ 1 1 1 ˆ( ) ( ) ˆ 2 2 j 1 1 1 ˆ( ) ( ) ˆ 2 2 j at at at at u x t F u t F e F e a F e F e a 应用延迟定理 j j ( ) ( ( )) ( ) ˆ at at F x at e F x e 1 j ˆ( ) ( ) at F e x at j j 1 ˆ( ) j x at x at at F s ds e F s ds e 1 j 1 ˆ( ) j x at at F e s ds