Presented is a model for the multi region and variable node PWR core.

建立了多区变节点压水堆堆芯的数学物理模型。

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Conclusion It is an effective method to use multi - source proliferation mathematical model for studying the pollutants exposure concentration in atmosphere of the health survey region in history.

结论利用多源扩散数学模型是研究健康调查区域内大气污染物历史暴露浓度的一种可行方法。

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Since there are the facts of the multi-objective and uncertainty in the water resource system, we built a fuzzy multi-objective programming model for the region water resource system.

针对区域水资源系统规划的多目标性和各目标的不精确性，建立了区域水资源系统模糊多目标线性规划模型。

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