In the forward transformation of wave-field, in order to decrease the number of integral coefficients and the sampling number of dispersed digital integral, as well as ensure the transient electromagnetic field calculation precision, a two-step optimized method has been proposed. This method can deal well with the ill-posed question caused by large amount of integral coefficients and depress the ill-posed problem of the first-kind calculator function. In the wave-field inverse transformation, the normalized method has been adopted, optimized and normalized parameters have been selected by the deviation theory and the Newton iterative form, to make the transformed wave field stable and reliable. The comparison between numerical results and known wave-field function values shows that the method put forward in this paper is effective and useful.
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Li et al. (2005) studied this question.
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