Numerical Mode-Matching (NMM) predigests a calculation of two-dimensional as using an analytic expression of one-dimensional counting the other-dimensional, and the efficiency is improved dramatically.

• 因为数值模式匹配法（NMM）是一种精确高效的半解析半数值方法，特别适用于在水平和纵向任意分层结构的分析，是正演分析的首选。