共查询到19条相似文献,搜索用时 78 毫秒
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设f是图G的一个正常的k-全染色,若G中任意两点的色集不同,则称f为G的k-点可区别全染色,简记为k-VDTC of G,,并称最小的k为G的点可区别全色数。该文针对完全图的点可区别全染色的特点提出了分类顺次着色算法,该算法首先按照一定的规则对元素进行分类然后对元素进行顺次着色,同时给出关联锁表,根据关联锁表判断是否得到问题的解。实验结果表明:该算法有效地解决了完全图的点可区别全染色问题。 相似文献
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文章主要刻画了循环图C2n(1,2n/3)的k-偶匹配可扩性,得出对任意的n(n>3),C2n(1,2n/3)是2-偶匹配可扩性的. 相似文献
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图的邻点可区别均匀V-全染色(AVDEVTC)是指在满足邻点可区别V-全染色的基础上,还要保证每种颜色的使用次数相差不超过1,把完成AVDEVTC所用的最少颜色称为图的邻点可区别均匀V-全色数(AVDEVTCN)。针对图的AVDEVTC问题,提出了一种基于多目标优化的染色算法。设计了一个总目标函数和四个子目标函数,在染色矩阵上通过每个点的颜色集合的迭代交换操作,使得每个子目标函数都达到最优,进而满足总目标函数的要求,完成染色。经过理论分析和实验对比表明,8个顶点以内的所有简单连通图都存在AVDEVTC,且图的AVDEVTCN介于最大度加1与最大度加2之间。实验结果表明,该染色算法能够在较短的时间内正确地计算出1000个顶点以内的图的AVDEVTCN。 相似文献
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2010年,Ham和Lin提出了强t一致的概念,并设计了一个强(n,t,n)可验证的秘密共享方案,但该方案的效率较低.提出一个基于范德蒙行列式性质的高效的强(n,t,n)可验证的秘密共享方案,该方案可以抵抗并检验出Harn方案中出现的欺诈行为.同时,新方案无须选取Ham方案中的kn个子多项式,在保证秘密份额满足强t一致定义的前提下具有较低的计算复杂度. 相似文献
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《计算机应用与软件》2013,(3)
设f是简单图G的一个正常k-全染色,若G中任意两点所关联的点及其关联边的颜色所构成的集合互不相同,则称f为G的K-点可区别强全染色,k中的最小值为G的点可区别强全色数。针对完全图的点可区别强全染色的特点,提出一种新算法。该算法把需要填充的颜色分为两部分:超色数和正常色数,在分别得到其染色数量和染色次数的前提下先对超色数进行染色以增强算法的收敛性。实验结果表明,该算法能有效地解决完全图的点可区别强全染色问题。 相似文献
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《国际计算机数学杂志》2012,89(4):726-732
A k-adjacent vertex distinguishing edge colouring or a k-avd-colouring of a graph G is a proper k-edge colouring of G such that no pair of adjacent vertices meets the same set of colours. The avd-chromatic number, denoted by χ′a(G), is the minimum number of colours needed in an avd-colouring of G. It is proved that for any connected 3-colourable Hamiltonian graph G, we have χ′a(G)≤Δ+3. 相似文献
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《国际计算机数学杂志》2012,89(11):2298-2307
Let G be a simple graph with no isolated edge. Let f be a total colouring of G which is not necessarily proper. f is said to be adjacent vertex distinguishing if for any pair of adjacent vertices u, v of G, we have C(u)≠C(v), where C(u) denotes the set of colours of u and its incident edges under f. The minimum number of colours required for an adjacent vertex distinguishing not necessarily proper total colouring of G is called the adjacent vertex distinguishing not necessarily proper total chromatic number. Seven kinds of adjacent vertex distinguishing not necessarily proper total colourings are introduced in this paper. Some results of adjacent vertex distinguishing not necessarily proper total chromatic numbers are obtained and some conjectures are also proposed. 相似文献
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邻点可区别[VI]-均匀全染色是指图中任意两条相邻边分配不同的颜色,且任意两个色类(点或边)的颜色个数最大相差为1,同时确保相邻顶点的色集合不同,其所用的最少颜色数称为图的邻点可区别[VI]-均匀全色数。提出了一种针对随机图的邻点可区别[VI]-均匀全染色算法,该算法依据染色条件设计了三个子目标函数和一个总目标函数,并依据交换规则逐步迭代寻优,直至染色结果满足总目标函数的要求。同时给出了详细的算法执行步骤,并进行了大量的测试和分析,实验结果表明,该算法可以高效地求出给定顶点数的图的最小邻点可区别[VI]-均匀全色数。 相似文献
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《国际计算机数学杂志》2012,89(10):2142-2151
In this paper, we give some new properties of edge chromatic critical graphs, and give new lower bounds for the average degree of Δ-critical graphs with Δ=11, 12 by the use of these properties. 相似文献
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Although there are polynomial algorithms of finding a 2-partition or a 3-partition for a simple undirected 2-connected or 3-connected graph respectively,there is no general algorithm of finding a k-partition for a k-connected graph G=(V,E),where k is the vertex connectivity of G.In this paper,an O(k^2n^2) general algorithm of finding a k-partition for a k-connected graph is proposed,where n=|V|. 相似文献
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An adjacent vertex-distinguishing edge coloring of a simple graph G is a proper edge coloring of G such that incident edge sets of any two adjacent vertices are assigned different sets of colors. A total coloring of a graph G is a coloring of both the edges and the vertices. A total coloring is proper if no two adjacent or incident elements receive the same color. An adjacent vertex-distinguishing total coloring h of a simple graph G=(V,E) is a proper total coloring of G such that H(u)≠H(v) for any two adjacent vertices u and v, where H(u)={h(wu)|wu∈E(G)}∪{h(u)} and H(v)={h(xv)|xv∈E(G)}∪{h(v)}. The minimum number of colors required for an adjacent vertex-distinguishing edge coloring (resp. an adjacent vertex-distinguishing total coloring) of G is called the adjacent vertex-distinguishing edge chromatic number (resp. adjacent vertex-distinguishing total chromatic number) of G and denoted by (resp. χat(G)). In this paper, we consider the adjacent vertex-distinguishing edge chromatic number and adjacent vertex-distinguishing total chromatic number of the hypercube Qn, prove that for n?3 and χat(Qn)=Δ(Qn)+2 for n?2. 相似文献