line symmetry
3.The temperature and stress field of wagon wheel under the condition of long ramp way cycle braking in Daqin line have been simulated by using FEM and axial symmetry model Results indicate that high stress area appears on the wheel web, and the strength of wheel meets the requirement of routine operation under current braking condition.
4.First we assume that there is no spontaneous symmetry broking, starting from the formalism of path integrals and using the gauge invariance requirement, we obtain the Ward-Takahashi identities for the 3-line VIB proper vertex functions and prove that its tensor structure is the same form as that of bare vertex couplings, which indicated the W~± bosons have neither anomalous magnetic moment nor electric quadrupole moment.
