On the basis of the joint tree model, an embedding of a graph on a surface can be rep-resented by a joint tree, further by an associatedsurface of it.
在联树模型的基础上,把图在曲面上的嵌入用其联树,也即其关联曲面来表示。
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During tumor chemotherapy, USES Electrochemical therapy at local tumor or on tumor -associatedsurface to decrease toxic and side effect of tumor chemotherapy and improve effect.