【摘要】 机械制造过程中为了获得低成本、高性能的产品,首要的是在可用的材料中选择出最优的材料。然而材料选择过程中涉及因素众多,有定量因素和定性因素,并且属性之间还可能存在不同程度的关联。对定性因素处理时利用隶属度函数的方法将模糊语言转化为模糊数,不仅计算复杂而且具有一定的主观性。首选采用模糊层次分析法确定单个属性的模糊测度,然后根据专家的知识确定任意两属性之间的关联系数,进而确定任意属性集的模糊测度。计算定量属性的综合评价值,确定方案在各属性下的排序,建立序权矩阵,采用关联线性分配方法确定最终排序。最后以太阳能相变材料选择为例,阐述了详细的决策过程。更多还原

【Abstract】 In the process of mechanical manufacturing,a primary task is to select the most appropriate material from the feasible ones to obtain the products with lower cost,yet with higher performance. However,it involves so many attributes including qualitative attributes and quantitative ones,sometimes even interacting with each other.Dealing with qualitative attributes using a membership function to convert a fuzzy linguistic term to a fuzzy number is not only complex but also subjective. Fuzzy analytic hierarchical process was used to identify the fuzzy measure of a single attribute,and then the interaction indexes between any two attributes were determined according to the experts’ knowledge,and consequently the fuzzy measure of any attributes could be determined. Computing the overall ratings of quantitative attributes,determining the orders of alternatives under an attribute,and constructing the matrix of order weight,we can determine the final rankings using linear allocation method can be determined. A case in point for illustrating the decision making process is phase change material selection for solar thermal power generation.更多还原