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Using the expression of energy-momentum pseudo-tensor of cylindrical gravitational waves of both the polarized states, file authors got the expression of the energy and momentum after a great lot of calculations. The results are discussed, from these discussions, it is concluded that Cartesian coordinates is better than cylindrical coordinates to describe the cylindrical gravitational waves of both the polarized states. 相似文献
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The energy-momentum tensor of electromagnetic field outside the neutron star with magnetic moment is cal-cuated based on the metric tensor and 4-dimmensioal potential outside the spherical symmetric mass with magnetic moment. The numerical calculation and the distributed curve indicate that the electromagnetic energy of the magnetic-dipole will be greater in curved space-time than in Minkowski space-time. 相似文献
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