本文用射影观点考察三角形的“五心”定理，通过配极变换推出五个新的命题。
The author of the essay studies the transmutation of the triangular theorem of "Five Centers" theorem from the projective viewpoint and puts forward five thoughtful propositions through polarization.
本文研究与网络题有关的一些极图，得出的主要结果有：五个关于没有三角形的极大图的定理，以及它们的三个推论。
In this. paper, some extreme graphs relative to network problems are studied. The main results include five theorems on maximum graphs without triangles and their three corollaries.
提出了一种在对极几何约束下来求取三角形网格结点位移的方法。
A method to determine mesh node displacement using Epipolar geometry is proposed.
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