The two methods of model simplification are presented for large scale systems, they are the least square approximation and the rational fraction approximation.
本文针对大系统的频域模型简化提出了两种方法：最小二乘近似法和有理分式近似法。
Truncating that continued fraction can give you a best rational approximation.
截断，连分数可以给你一个最佳有理逼近。
Truncating that continued fraction can give you a best rational approximation.
截断，连分数可以给你一个最佳有理逼近。
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