2002年国际数学家大会在北京召开，大会的会标是我国古代数学家赵爽画的“弦图”，体现了数学研究中的继承和发展。
In this paper,we introduce some basic properties of chordal graphs, study the corresponding structural chacterizations,including clique tree, minmum vertex separator,perfect elimination order and maximum weight spanning tree of clique graph.
本文首先介绍了弦图的基本性质,主要研究了从极小点分离集,团树,完美消去排序,赋权团图的极大支撑树等角度对弦图结构的刻画。
参考来源 - 弦图的基本性质及其推广应用·2,447,543篇论文数据，部分数据来源于NoteExpress
借助与桁架对应的梁的剪力图和弯矩图根据两个关系式可直接求出一般平面平行弦桁架任一根杆件的轴力。
For a complanate parallel chords truss, the axial forces of a member can be solved by the shear-diagram and two simple expressions.
介绍了一种用剪力图和弯矩图求平面平行弦桁架内力的关系式，并利用截面法给出了相应的证明。
By means of the shear-diagram and the bending-diagram, the expressions of the internal forces in the members of the truss are introduced and demonstrated by the cross-section method in this paper.
对弦虚脉、弦弱脉作为相兼脉的属性，从文献研究、弦脉的脉图、弦脉的特征进行论证。
As far as the nature of weak-taut pulse and feeble-taut pulse are concerned, the author demonstrates in various aspects including documentary studies, conditions and characters of taut pulse.
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