In this article, we give several direct and recursive constructions for a cyclically almost resolvable cyclic directed triple system when λ=1.
给出了当λ=1时,循环几乎可分解的循环有向三元系的直接构造和递归构造。
This paper adopts such an assembly modeling method which is named as Oriented Functional Relationship Graph.
采用了一种名为有向功能关系图 (OFRG)的机械装配建模方法 ,并详细论述其功能尺寸和非功能尺寸的设计 ,继而确定出零件的尺寸树 ,为零件的尺寸自动标注提供必要的数据信息。
Thus the spectrum of intersections for simple threefold directed triple systems was determined.
证明了对于任意正整数ｖ≥３，存在两个ｖ阶单纯三重有向三元系相交于ｓ个公共有向三元组的充要条件是：当ｖ＝３时，ｓ∈｛６｝；当ｖ＝４时，ｓ∈｛０，１，２，…，１２｝＼｛１，１１｝；当ｖ≥５时，ｓ∈｛０，１，２，…，ｖ（ｖ－１）｝＼｛ｖ（ｖ－１）－１｝，从而完全确定了单纯三重有向三元系相交数的
The intersection problem of simple directed triple systems with λ =2 is completely solved, namely, it is proved that for v ≡0,1 (mod 3), v ≥3,there exist two simple DTS( v ,2)s intersecting in s triple if and only if, s∈{0,1,2,…,2v(v-1)/3},s≠[2v(v-1)/3]-1, while v≥4 s∈{0,2,4},while v=
解决了单纯二重有向三元系的相交数问题。