【Key words】 Semi-automatic Extraction； 3D Reconstruction； Linear Template Matching； Linear Matching； 3D City Model； Stereo Image Pair-, 3D Topology Data Model for Reconstruction； Topological Chain；
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According to the concept of topological chain recurrent, a special flow "non-compact flow" is introduced on metric space, some properties and examples of this flow are given.
通过拓扑链回归概念，在非紧致度量空间中引入一类特殊的流———非紧致流，同时给出该类流的一些特性和实例。
Through discussing the separation axiom of topological space, we can get the relation-chain of separation axioms. Then the paper lists some examples which are not included in each separation axiom.
通过对拓扑空间上分离公理之间的讨论得出公理关系链，主要给出了各分离公理不能包含的例子。
Topological structure models of the supply chain in the food processing industry are studied from both static and dynamic aspects.
从静态和动态两方面研究了食品加工业供应链的拓扑结构模型； 研究了食品加工业供应链的体系结构；
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