那所谓可以相加的功用（Additive utility），遇到互补物品plements，如面包与牛油）或代替物品（Substitutes，如咖啡与茶）的情况，就有不容易解决的困难。
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additive utility function 加的效用函数 ; 可加效用函数
group additive utility function 群可加效用函数
additive utility model 加法效用模式
strongly additive utility function 强可加效用函数
assessment of additive utility function 可加效用函数的评估
A barycenter model of group decision making on resource allocation is constructed in this paper using group's loss function based on the additive form of group cardinal utility function.
根据群体基数效用函数的加和性，用距离表示群体的损失函数，建立了资源分配群体决策的重心模型。
A barycenter model of group decision making on resource allocation is constructed in this paper using groups loss function based on the additive kind of group cardinal utility function.
根据群体基数效用函数的加和性，用距离表示群体的损失函数，建立了资源分配群体决策的重心模型。
The utility model has the advantages of simple operation, convenient usage and the additive function that the decoration painting can be stored with double sides at the same frame.
本实用新型的有益之处在于：操作简单，使用方便，增加了可以在同一画框内进行双面存放装饰画的功能。
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