It is the classification for the Quaternary stratigraphies of Hebei Plain study to build a platform for the aquifer structure model of the North China Plain .
该文是在以往研究基础上对河北平原第四纪地层划分的一次探讨，其成果为建立华北平原含水层结构模型搭建了平台。
On the basis of analyzing and utilizing the existent classification planning model, the thesis describes its abstract mathematic structure and builds an optimization model for BCT scheduling.
在分析和借鉴已有编组计划模型的基础上，系统的描述了模型的抽象数学结构，构建了班列开行方案的优化模型。
Also this paper discusses the classification of the designed structure model of underground mines.
论文对地下矿山构建筑物模型进行分类研究。
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