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9 个结果
  • 简介:一张图的一个顶点被说统治它的邻居的本身和所有。图G的一个双统治集合是G的顶点的集合D,以便G的每个顶点被D的至少二个顶点统治。图G的双支配数字是G的一个双统治集合的最小的集的势。为图G=(V,E),如果V(G)\D的每个顶点在D有至少二位邻居,子集DV(G)是一个2-dominating集合,当如果,统治G的集合是2-outer-independent的时另外集合V(G)\D是独立的。G的2-outer-independent支配数字是统治G的集合的2-outer-independent的最小的集的势。这份报纸加一个与双支配数字平等者描绘所有树到2-outer-independent支配数字。

  • 标签: 独立控制数 顶点表示 直流电压 控制集 支配集 顶点集
  • 简介:为RivestShamirAdleman(RSA)密码学的有效硬件实现的平行体系结构被建议。残余数字系统(RNS)被介绍认识到高并行,因此,在一样下面的所有元素基于独立于对方并且能在平行被计算。而且,简单、快的基础转变被用来完成RNS蒙哥马利模块化的增加算法,它便于硬件实现。把触发的建筑学(TTA)基于运输,建议体系结构被设计评估算法的性能和可行性。与这些优化,106kbps的解密率能在100MHz的频率为1024-bRSA被完成。

  • 标签: RSA加密 硬件架构 余数系统 硬件实现 并行计算 体系结构
  • 简介:At-hyperwheel(t≥3)oflengthl(orW(t)lforbrevity)isat-uniformhypergraph(V,E),whereE={e1,e2,...,el}andv1,v2,...,vlaredistinctverticesofV=∪eii=1lsuchthatfori=1,...,l,vi,vi+1∈eiandei∩ej=P,j∈/{i1,i,i+1},wheretheoperationonthesubscriptsismodulolandPisavertexofVwhichisdifferentfromvi,1≤i≤l.Inthispaper,theminimumcoveringproblemofMCλ(3,W(3)4,v)isinvestigated.DirectandrecursiveconstructionsonMCλ(3,W(3)4,v)arepresented.Thecoveringnumbercλ(3,W(3)4,v)isfinallydeterminedforanypositiveintegersv≥5andλ.

  • 标签: 最小覆盖问题 一致超图 递归结构 Tgt 直接和 覆盖数
  • 简介:BackgroundPreviousstudieshavesuggestedthatpatientswithlowendothelialprogenitorcell(EPC)countsandimpairedendothelialcolonyformingactivityhaveahigherincidenceforcardiovasculareventscomparedtopatientswithhighEPCcountsandfavorablecolonyformingactivity.ThepathophysiologicalbasisforthisfindingmaybeaninsufficientendothelialcellrepairbyEPC.TheobjectiveofthisstudywastodeterminewhetherthenumberofEPCsinperipheralbloodwasassociatedwiththepresenceandseverityofangiographicstenosisinpatientsofthelatephaseafteracutemyocardialinfarction(AMI).MethodsOnehundredandonepatientsundergoingcardiaccatheterizationinourhospitalwereenrolledinthestudy.ThenumberofcirculatingEPCswasmeasuredbyafluorescent-activatedcellsorter(FACS).Patientswithacutecoronarysyndromeswereexcluded.ResultsComparedwithpatientswithnormalcoronaryartery,thenumberofcirculatingEPCswassignificantlyreducedamongpatientsinthelatephaseafterAMI(P<0.01).Wealsofoundthatcomparedwiththecontrolgroup,thenumberofEPCsofsingle-vesselstenosisgroupandmulti-vesselstenosisgroupweresignificantlyreduced(P=0.005;P=0.001).ConclusionsThenumberofEPCsintheperipheralbloodisdecreasedinpatientsofthelatephaseafterAMI.TheEPCsnumbercorrelatedwithangiographicstenosisseverity,whichsuggeststhatendothelialinjuryinthedeficientcirculatingEPCsmayaffecttheseverityoftheheartdisorderandtheclinicalpresentations.

  • 标签: 血管内皮细胞 冠状动脉疾病 细胞数目 内皮祖细胞 急性心肌梗死 急性冠脉综合征
  • 简介:图G的导致的路径数字(G)被定义为G的顶点集合能被划分成的子集的最小的数字以便每个子集导致一条路径。Broere等。如果G是顺序n的一张图,证明了那,那么$\sqrtn\leqslant\rho\left(G\right)+\rho\left({\barG}\right)\leqslant\left\lceil{\tfrac{{3n}}{2}}\right\rceil$。在这份报纸,我们描绘图G为哪个$\rho\left(G\right)+\rho\left({\barG}\right)=\left\lceil{\tfrac{{3n}}{2}}\right\rceil$,在$\rho\left(G\right)上改进更低的界限+\rho\left({\barG}\right)$在一个当n是一个奇怪的整数的平方时,并且为$\rho\left(G\right)决定最好的可能的上面的界限+\rho\left({\barG}\right)$当既不G也不$\barG$孤立顶点时。

  • 标签: 路径数 诱导 形数 顶点集 最小数 子集
  • 简介:Inordertoraisetheprecisionofstresswaveimagingtechnology(SWIT),undertheconditionsofdifferentareaandoutlineofsimulatedcavitydefectsintimberdiscsofspruce,differentnumberofusedsensors,therelationshipbetweenimaginggraphdefectsandrealdefectsisstudied.Theresultshows:SWITcandisplaygraphofdefects,theprecisionofimaginggraphrelatestorateofrealdefectareaandareaofthetestedwoodcrosssection,thenumberofusedsensorsandoutlineshapeofthedefects.Whentheraterisesfrom1.6%to25.0%,therelativeerrorofgraphdefectareaandrealdefectareadropsfrom22.6%to9.7%.Whenthenumberofusedsensorsisfrom6to24,thegraphofSWITcanshowtheexistenceofrealdefect.ButthenumberofsensorsusedinfluencestheprecisionofSWIT.Outlineshapeofdefectshascertaineffectondetectionofdefects.Undertheconditionofthesamedefectarea,thedefectsoflongandnarrowshapeareeasytobeshownbygraph.Therelationerrorofdefectareaofsuborbicularshapeissmallerthanthatoflongandnarrowshape.

  • 标签: stress wave imaging technology precision RELATIVE