Then three schemes of the preconditioned sparse matrix canonical grid ( p - smcg ) method are presented and discussed . the sparse matrix canonical grid method is applied to analyze electromagnetic scattering from three - dimensional random dielectric scatterers in conjunction with the generalized minimal residual ( gmres ) method . in the end , these four schemes are applied to analyze electromagnetic scattering from three - dimensional random dielectric scatterers 論文首先運(yùn)用smcg方法對(duì)隨機(jī)分布三維介質(zhì)目標(biāo)的電磁散射問(wèn)題進(jìn)行較為全面的分析和討論,然后討論了如何對(duì)smcg方法進(jìn)行預(yù)處理,提出了預(yù)處理smcg方法的三種方案,接下來(lái)又討論了將smcg方法和廣義最小余數(shù)法( gmres )結(jié)合起來(lái)的方案,最后應(yīng)用上面提出的四種方案對(duì)多個(gè)隨機(jī)分布三維介質(zhì)目標(biāo)的電磁散射問(wèn)題進(jìn)行了分析。