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以模糊数学为理论依据，将空调冷源设备的综合性能和经济效益全面考虑，建立了制冷机的二级综合评判数学模型．该模型将因素集中的９ 个因素按初投资、运行费用以及安全环保运输分割成３ 个子集 Ｕ１， Ｕ２， Ｕ３ ，然后按一级评判得出其单因素评判矩阵 Ｒ１ ， Ｒ２ ， Ｒ３ ，给出３ 个子集 Ｕ１ ， Ｕ２ ， Ｕ３ 的权重分配，进行二级综合评判，得出最佳设备，并给出应用实例，实例计算表明，理论结果与实际结果完全相符
Taking fuzzy mathematics as the theoretical basis, the overall performance and economic benefits of the air-conditioning cold source equipment are fully considered, and the secondary comprehensive mathematical model of the refrigerator is established. The model divides nine factors into three subsets U1, U2, U3 according to the initial investment, operating cost and safety and environmental protection transportation, and then obtains the single factor evaluation matrix R1, R2, R3 according to the first-level evaluation Three sub-sets U1, U2, U3 weight distribution, two-level comprehensive evaluation, the best equipment, and gives examples of applications, examples show that the theoretical results and the actual results are fully consistent