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提出一种以模糊数学和关系代数为理论基础、适用于面向制造的设计中支持毛坯选择的多属性评价算法。可综合考虑毛坯的数值属性和语值属性。它通过对不同属性满足程度的计算，综合判断评价对象的优劣。举例说明了算法的应用。
This paper proposes a multi-attribute evaluation algorithm based on fuzzy mathematics and relational algebra, which is suitable for rough design in manufacturing-oriented design. May consider the numerical properties of the blank and the value attribute. It calculates the degree of satisfaction of different attributes and synthetically judges the pros and cons of evaluation objects. An example is given to illustrate the application of the algorithm.