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提出了评价换热器在浮动运行条件下性能优劣的多目标偏差二阶矩函数,使用正交表识别换热器各结构参数对评价函数的效用,从而高效地挑选出在多目标约束下可靠运行的标准规格产品.“,”In this paper, one set of second order deviation functions with multi objects for evaluating the performance of the exchangers under the fluctuanting conditions was presented. An orthogonal arra was applied to identify the effects of each structure parameters so as to select the qualified products which comply with the multi objects restrictions.