At the same time, the globally decentralized nature of such modern systems makes it impractical to take a monolithic approach to systems analysis and optimization.

与此同时，此类现代系统的地域性分散特征使得采用单一的系统分析和优化方法是不切实际的。

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Since the seventies of last century, levels of decentralized decision-making system optimization been studied.

上世纪七十年代以来，层次分散系统优化决策问题被人们研究。

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