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Vol.15No.62005(,063009)(:2005202205),.;;,,,..,SDdS=VdVlEdl=S-5B5tdSSBdS=0lHdl=Sj+5D5tdS,EB,.,.SAdS=VAdVlAdl=SAdS..,,,.1,,dV,dV=dxdydz,O(xyz),D(DxDyDz),x12,DxD1x=Dx+5Dx5xdx2D2x=Dx-5Dx5xdx2112dx=Dx+5Dx5xdx2dydz-Dx-5Dx5xdx2dydz=5Dx5xdxdydzyzdxdzdydxdy=5Dy5ydxdydzdz=5Dz5zdxdydz,dVd=dx+dy+dz95©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=5Dx5x+5Dy5y+5Dz5zdxdydzSDdS=VdV,SDdS=Vd=V5Dx5x+5Dy5y+5Dz5zdV=VdV,5Dx5x+5Dy5y+5Dz5z=D=(1)B=0(2)2,,zdS,O(xyz),HHxHyHz,1234HyHy12=Hy+5Hy5xdx2Hy34=Hy-5Hy5xdx222341HxHx23=Hx+5Hx5ydy2Hx41=Hx-5Hx5ydy2lHdl=Sj+5D5tdSlHdl=Hy12dy-Hx23dx-Hy34dy+Hx41dx=5Hy5x-5Hx5ydxdy=j+5D5tdS=j+5D5tdxdy^z=jz+5Dz5tdxdy5Hy5x-5Hx5y=jz+5Dz5t5Hz5y-5Hy5z=jx+5Dx5t5Hx5z-5Hz5x=jy+5Dy5tH=j+5D5t(3)E=-5B5t(4),,((1)(4)).,.[1]..:,1997[2]..:,2004[3]..:,1999,,,,..06©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.