管文慧,李 晶,高曉慧
(太原科技大學(xué)應(yīng)用科學(xué)學(xué)院,太原 030024)
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邊故障5元n立方體的兩條不交覆蓋路
管文慧,李 晶,高曉慧
(太原科技大學(xué)應(yīng)用科學(xué)學(xué)院,太原 030024)
互連網(wǎng)絡(luò);5元n立方體;不交路覆蓋
Q[j]和Q[j+1]稱為相鄰子立方體,對于Q[j]中的任一頂點(diǎn)xj,在Q[j-1]和Q[j+1]中分別有一個(gè)對應(yīng)點(diǎn),記為xj-1和xj+1.對任意兩個(gè)整數(shù)p,q∈[0,k],且p 下面給出證明中將用到的引理。 引理2[5]設(shè)m≥3,奇數(shù)n≥3,則Torus(m,n)有兩條點(diǎn)不交的覆蓋路連接圖中任意兩對頂點(diǎn)。 情形1a,b,c,d∈V(Q[0]). 圖1 情形1Fig.1 Case 1 情形2a,b,c∈V(Q[0]),d∈V(Q[r])(r=1,2,3,4). 選取我院2017年1月~2018年1月收治的50例異位妊娠患者為研究對象,隨機(jī)分為兩組,各25例,對照組接受經(jīng)腹彩超檢測,年齡21~44歲,平均年齡(27.5±3.5)歲,停經(jīng)時(shí)間30~120d,平均停經(jīng)時(shí)間(49.5±2.5)d;觀察組接受經(jīng)陰道超聲檢測,年齡22~45歲,平均年齡(28.5±3.5)歲,停經(jīng)時(shí)間31~120d,平均停經(jīng)時(shí)間(50.0±2.5)d;兩組患者均已通過相關(guān)檢測,符合檢測標(biāo)準(zhǔn),無超聲、彩超不適者,均有明顯停經(jīng)史,HCG顯示陽性,排除其他傳染疾病,年齡、停經(jīng)時(shí)間等方面經(jīng)統(tǒng)計(jì)學(xué)分析,無顯著性差異,P>0.05,有可比性。 情形2.1.1 (t0,t1)∈F,則(t0,t4)?F. 圖2 情形2.1.1Fig.2 Case 2.1.1 情形2.1.2 (t0,t4)∈F,則(t0,t1)?F. 若t1≠d,由引理3得,Q[1,4]存在一條Hamilton路P[t1,d],令P2[c,d]=P[c,t0]∪(t0,t1)∪P[t1,d](如圖3(a)所示). 圖3 情形2.1.2Fig.3 Case 2.1.2 圖4 情形2.2Fig.4 Case 2.2 情形4a,b∈V(Q[0]),c∈V(Q[r]),d∈V(Q[l])(0 圖5 情形3Fig.5 Case 3 圖6 情形4Fig.6 Case 4 情形5a,c∈V(Q[0]),b∈V(Q[r]),d∈V(Q[l])(0 圖7 情形5Fig.7 Case 5 情形6a∈V(Q[r]),b∈V(Q[s]),c∈V(Q[t]),d∈V(Q[l]). 情形6.1 0≤r 情形6.2 0≤t 圖8 情形6.2Fig.8 Case 6.2 [1] RAK T DVO.Hamiltonian cycles with prescribed edges in hypercubes[J].SIAM J Discrete Math,2005,19:135-144. [2] 佘衛(wèi)強(qiáng),方來金.邊故障超立方體中兩條無故障點(diǎn)不交路[J].漳州師范學(xué)院學(xué)報(bào),2009(1):7-9. [3] 佘衛(wèi)強(qiáng).邊故障3-aryn立方體中兩條無故障點(diǎn)不交路[J].漳州師范學(xué)院學(xué)報(bào),2010(3):6-12. [4] BOSE B,BROEG B,KWON Y.Lee distance and topological properties of k-ary n-cube[J].IEEE Transaction on Computers,1995,44(8):1021-1030. [5] JUNG-HEURN PARK.Many-to-Many Disjoint Path covers in two-dimensional Tori[J].Journal of KIISE,2011,38(1):42-48. [6] LIN SHANGWEI,WANG SHIYING.Panconnectivity and edge-pancyclicity of k-ary n-cubes with faulty elements[J].Discrete Applied Mathematics,2011,159:212-223. 2-Disjoint Path Covers in 5-aryn-cubes with Fault Edges GUAN Wen-hui,LI Jing,GAO Xiao-hui (Taiyuan University of Science and Technology,Taiyuan 030024,China) The paper studies the problem of 2-disjoint paths cover of 5-ary n-cube.LetFbe any subset of edges withF≤2n-4,the following result is obtained.Assuming thata,b,canddare arbitrarily four distinct vertices inQ5n,there exist two fault-free vertex-disjoint pathsP1betweenaandbandP2betweencand indsuch that cover ofQ5n. interconnection network,5-aryn-cube,disjoint paths cover 2015-04-14 國家自然科學(xué)基金(61303020);山西省青年自然科學(xué)基金(2013021018-3);山西省高等學(xué)校優(yōu)秀青年學(xué)術(shù)帶頭人支持計(jì)劃(20151005) 管文慧(1990-),女,碩士研究生,主要研究方向?yàn)閳D論及泛函分析。 1673-2057(2015)06-0470-05 O157.5 A 10.3969/j.issn.1673-2057.2015.06.0122 定理1證明