简介：Foranasymmetricmatrix,thezero-nonzeropatternPofentriescanbedescribedbyadigraphΓ(P)whichhasanarcifanentryisnonzero.Theminimumrankofazero-nonzeropatternisdefinedtobethesmallestpossiblerankoverallrealmatriceshavingthegivenzero-nonzeropattern.Definitionsofvariousgraphparametersthathavebeenusedtoboundminimumrankofazerononzeropattern,includingpathcovernumberandeditdistance,andthetrianglesizetri(P).Inthispaper,byconvertingadigraphintoanundirectedbipartitegraphG(U,V),wepresentanalgorithmforconstructingasub-bipartitegraphwiththeuniquemaximumperfectmatchingM',andobtainthattri(P)=|M'|forP.

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简介：数字0看似稀松平常，但日常生活中如果没有它我们将束手无策。可令人吃惊的是，公元8世纪之前的中国人只有1—9，还没有使用0；而关于0的发明，最早记录也在公元前3世纪。那么0到底是怎么发明的?又是怎样传入中国的?

简介：Inthispaper,weobtainthesolitonsolutionsforthe'good'Boussinesqequationonaconstantbackground.Basedontheasymptoticanalysisofthesolutions,wefindthatthisequationadmitsboththeelasticandresonantsolitoninteractions,aswellasvariouspartiallyinelasticinteractionscomprisedofsuchtwofundamentalinteractions.Viapicturedrawing,wepresentsomeexamplesofsolitoninteractionsonnonzerobackgrounds.Ourresultsenrichtheknowledgeofsolitoninteractionsinthe(1+1)-dimensionalintegrableequationwithasinglefield.

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简介：有这样一只神圣的杯子。谁得到它，谁就能实现任何一个愿望。参与争夺的人都拥有着强大的魔法。他们可以召唤出历史上的伟大人物。在第四轮争夺中，出现了三个王。

简介：Sometimelakesare"drawndown"ordrainedinwintertopreventshorelinedamagefromthefreezingwater.

简介：Tokeepthesecrecyperformancefrombeingbadlyinfluencedbyuntrustedrelay（UR）,amulti-URnetworkthroughamplify-and-forward（AF）cooperativeschemeisputforward,whichtakesrelayweightandharmfulfactorintoaccount.Anonzero-sumgameisestablishedtocapturetheinteractionamongURsanddetectionstrategies.Secrecycapacityisinvestigatedasgamepayofftoindicatetheuntrustedbehaviorsoftherelays.Themaximumprobabilitiesofthebehaviorsofrelayandtheoptimalsystemdetectionstrategycanbeobtainedbyusingtheproposedalgorithm.

简介：<正>Newkindsofstronglyzero-dimensionallocalesareintroducedandcharacterized,whicharedifferentfromJohnstone’s,andalmostallthetopologicalpropertiesforstronglyzero-dimensionalspaceshavethepointlosslocalicforms.Particularly.theStone-Cechcompactificationofastronglyzero-diluensionallocaleisstonglyzero-dimensional.

简介：无污染，零排放；拧开“油门”的瞬间，67.7N·m的扭矩唾手可得；2秒内加速到48km/h,4秒内达到80km/h;重量不到70kg;跑1英里（1.6km）所需电费不到1美分。

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简介：Inthispaper,forzero-failuredata(ti,ni),atmomentti,ifthepriordistributionofthefailureprobabilitypi=P{T＜ti}isincompleteFisher-Zdistribution:Fisher-Z(0,λi;a,b),theauthorgivespihierarchicalBiyesianestimationandtheestimationofreliabilityunderzero-failuredataconditionisobtainedalso.Theauthoralsogivesapracticalcalculatingexampleusingthetheory.

简介：LetFλ={x∈(0,1){2nx}≥1/2k,n∈z+},z++={0,1,2,3,...},k∈N;F=U∞k=1Fλbeadecimalsetin(0,1),where{2nx}isthefractionalpartofanumber2nx.Inthisnote,weprovethatdirnнF=1andН1(F)=0,wheredimнisHausdroffdimension,andН1(F)istheHausdorffmeasureofF.

简介：ＡＳＩＭＰＬＩＣＩＡＬＨＯＭＯＴＯＰＹＡＬＧＯＲＩＴＨＭＦＯＲＣＯＭＰＵＴＩＮＧＺＥＲＯＰＯＩＮＴＳＯＮＰＯＬＹＴＯＰＥＳＣＨＥＮＫＡＩＺＨＯＵ（陈开周）；ＹＡＮＧＺＡＩＦＵ（杨再福）；ＬＩＡＮＧＺＨＥＮＧＬＩ（梁正礼）（ＤｅｐａｒｔｍｅｎｔｏｆＡｐ...

简介：在这篇论文，我们考虑安排有缺点的项目在每个产品的任何生产跑在被生产的问题的单个机器多产品许多。在在每个产品的正常生产以后的每个周期，机器是为一样的产品然后rework过程开始的有缺陷者的rework的安装。我们假设安装预定因为象rework进程一样的正常生产进程是非零。进一步，我们认为等待的时间有缺陷者花费了为重做。这篇论文有二个目的。第一个目的是为一个单个产品获得经济批数量(EBQ)。第二个目的是扩大第一个目的结果到多产品盒子。采用安排我们获得的政策的普通周期最佳的批为每个产品缩放以便每统一时间系统花费的总数被最小化。

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简介：Ananalyticalsolutionisgivenforatime-decayRankinevortexprofileduetoviscouseffects.Thevortexfilamentisassumedtobeisolated,strong,concentratedandhavingzero-meridionalflow(i.e.radialandaxialvelocitiesareequaltozero).Zero-meridionalrendersthegoverningequationsforanunsteady,incompressibleandaxisymmetricvortexinasimpleform.Basedonthetangentialmomentumequation,thespatial-temporaldistributionsoftheswirlvelocityaregivenintermsofFourier-Besselseriesbyusingseparationofvariablestechnique.Ageneralformulaisderivedbytotaldifferentiationoftheswirlvelocitywithrespecttotime,depictingtheviscousdissipationforOseenandTaylor-likevortexprofiles.Thisanalysisisvalidatedbycomparisonwithpreviousexperimentaldata.