The results of optimization design agree well with the optimization scheme of orthogonality design. And make an error analyse.

通过计算表明，优化设计结果和正交实验结果的最优方案基本一致，并进行了误差分析。

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So it is necessary to study the optimization operation of hot oil pipeline after adding DRA, which can make optimal scheme and provide basis for scientific decision.

因此，有必要对热油管道中添加减阻剂的优化运行进行研究，制定最优运行方案，为科学决策提供依据。

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It is needed to compare a few schemes in engineering design, select the best scheme, and make it optimization, which is a typical fuzzy mathematical problem.

工程设计中需要进行多方案比较，每个方案又由多项目标组成。选择出最佳的组合方案，使设计方案达到优化，这是模糊数学问题。

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