在混料试验中, 当混料模型较为复杂且混料成份较多时, 要 验证一个设计$\xi$的最优性是比较困难的. 一方面, 当模型或约束较为复杂时难以证明方差函数是否满足最优性准 则条件, 另一方面, 当混料成份多于3时不能通过绘制方差函数的曲面图来观 察最优性.文章提出一种可用于验证混料对称设计的最优性的图检验法 , 通过 实例分析, 这种方法是有效的.

In a mixture experiment, a complex mixture model or a big number of mixture components makes verifying the optimality of the design difficult, i.e., when the model or constraints are complex, it is difficult to prove whether the variance decision function satisfies the optimality criterion, or when the number of mixture components is greater than 3, the optimality cannot be observed by the surface graph of variance decision function. In this paper, a graph checking method is proposed to verify the optimality of symmetrical design of mixture. The effectiveness of this method can be showed by case analysis.