Mathematical model is a base of solving quantitatively environmental pollution control.
数学模型是定量解决环境污染控制问题的基础。
Spatial database, attributive database and model base were integrated by internal and external interfaces and applied in quantitative evaluation of eco environmental quality of Zigui County.
将空间数据库、属性数据库和应用模型库通过内部和外部接口集成一起，对秭归县的生态环境质量进行了定量评价。
On the base of the database, repository and the digital environmental model for assessing the risk of debris flow disasters were built.
据此，建立起泥石流爆发危险性评价数据库、知识库和危险性评价数字环境模型。
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