二维解释是采用点源有限单元法，为减少计算量，利用了互换原理。
In the two-dimensional interpretation, we adopt the point source finite-element method and the reciprocity principle which can lighten the calculation burden.
模型响应对电阻率及介电常数的偏导数用格林函数和互换原理计算。
The partial derivatives of the electromagnetic responses with respect to resistivity and dielectric parameter are calculated by using Green function based on reciprocity principle.
利用地震波传播的互换原理，将算法推广到用于计算反射纵波和反射转换横波的旅行时。
With the use of reciprocal principle in seismic wave propagation, the algorithm may be used to compute the travel times of reflected compressional wave or converted shear wave.
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