History once completed idealized mathematical, including the inevitability of things will form the decision model function, contingency things can form of section function.

历史学一旦完成理想化的数学化，其中的必然性事物会形成决定型函数，偶然性事物会形成分段函数。

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Author expatiates framework design method of model library system in agricultural information decision support systems and the process of form model in cost benefit analysis.

阐述了农业信息决策支持系统中模型库系统结构设计方法，以及经济效益分析的构模过程。

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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。

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