Based on rough sets and evidence combining theory, a general method of extracting the extension decision rules of probability information system is given.

使用粗糙集和证据合成理论中的方法，给出了获取概率信息系统的扩展决策规则集的一般方法。

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By the general principle of virtual experiment based on virtual prototyping, the virtual experiment method of probability and statistics' principle is used to implement the project.

按照基于虚拟原型的虚拟实验的一般原理，提出概率统计原理的虚拟实验方法以实现方案。

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Using the expression way of general event probability to fuzzy event probability, common method of probability can find fuzzy event period risk for fuzzy network planning.

对模糊型网络计划，计算模糊工期风险概率是利用模糊事件概率的普通事件概率表示方法，用常规的概率方法求解。

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