简介:ComplexitymeasuresforkeystreammultisequencesoverZ/(N)playacrucialroleindesigninggoodstreamciphersystems.Thiscorrespondenceshowsageneralupperboundonk-errorjointN-adiccomplexityofperiodicmultisequencesoverZ/(N),andestablishestheexistenceofperiodicN-adicmultisequencesoverZ/(N)whichsimultaneouslypossessmaximaljointN-adiccomplexityandlargek-errorjointN-adiccomplexity.UndersomeconditionstheoverwhelmingmajorityofallT-periodicN-adicmultisequencesoverZ/(N)withmaximaljointN-adiccomplexitylogN(NT-1)haveak-errorjointN-adiccomplexityclosetologN(NT-1).
简介:MotivatedbytheresetoptionwithnpredetermineddatesanalyzedbyW.Cheng,weconsiderakindofresetoptionwithuncertaindatesbyintroducingNpre-specifiedbarrierlevels.Weclaimthisresetoptionconsistsofsomestandardknock-inandknock-outbarrieroptions.Theclosed-formpricingformulaisderivedbymeansofaPDE'sapproach.
简介:Inthispaper,byvirtueofthecombinatorialoptimizationandgrouptestingmethodand,withascalewithoutweight,wedetectncoinscontainingatmostoneabnormal.Thencoinsareindistinguishableonlybytheirappearances.Wederiveanoptimalprocedureofdeterminingwhetherallthenballsarenormalornotandinthelattercase,ourprocedure(algorithm)alsotellswhethertheabnormalweighsmoreorweighslessthaneachofthenormals.Theoptimalalgorithmobtainedinthispaperisconstructive.
简介:SIGN-REVERSALPROPERTYFORF-MATRICESANDN-MATRICESXUSong(GraduateSchool,ChinaAcademyofRailwaySciences,Beijing100081,China)Abstra...
简介:Thispaperanalyzesafinite-bufferrenewalinputsingleserverdiscrete-timequeueingsystemwithmultipleworkingvacations.Theserverworksatadifferentrateratherthancompletelystoppingworkingduringthemultipleworkingvacations.Theservicetimesduringaserviceperiod,servicetimeduringavacationperiodandvacationtimesaregeometricallydistributed.ThequeueisanalyzedusingthesupplementaryvariableandtheimbeddedMarkov-chaintechniques.Weobtainsteady-statesystemlengthdistributionsatpre-arrival,arbitraryandoutsideobserver'sobservationepochs.Theanalysisofactualwaiting-timedistributionandsomeperformancemeasuresarecarriedout.Wepresentsomenumericalresultsanddiscussspecialcasesofthemodel.