According to the law of mass conservation the incremental mass density can be inferred from the divergency of the scalar unperturbed mass density and the vectorial displacement field.
由质量守恒定律，质量密度增量来自未挠动的质量密度的散度和位移矢量场。
2
The model employs the imaginary magnetic current density and magnetic charge density distributed over the interfaces of different regions, and the scalar potential on these interfaces as unknowns;
模型以假设分布于不同区域交界面上的虚拟磁流密度、磁荷密度以及标量电位为待求解的未知变量；
3
Besides that, we presents the gravitational wave energy density under the weak field situation and gives the x - y plane numerical calculation to curvature scalar R and energy density .