Based on Baosteel new No. 4 blast furnace lining structure, a three-dimensional temperature field mathematical model is established.
以宝钢新建4号高炉炉衬结构为原型，建立了这种炉衬结构三维温度场数学模型。
That 4-intersection model is necessary and sufficient for classifying topological relations between 2-dimensional spatial areas is proved, then these 3 different methods are unified.
证明了4交集模型对于分类二维空间区域间拓扑关系的充分必要性，从而将3种不同的研究方法统一起来。
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