简介:摘要随着我国国民经济和科技发展水平的迅猛发展,人们的生活质量和水平都有了一定程度的提高,用电安全成为关注的焦点,人均用电量也在不断增加,国家对电力设备的投入也在不断的加大,它的操作技术水平也在不断的提高,但是电力线路的碰线故障就会不断出现。电力线路和二次接线处理是分析电力线路导线碰线故障的基础,工作程序虽然简单,但却是整个电气系统的运行的关键部分。所以在安装电力的过程中对电力线路导线碰线故障分析十分重要,对各个影响因素能够及时对其进行有效控制,采用正确处理的方法,确保二次接线处理的正确性,方能保证电气设备正常的运行。除此之外,电气设备的接线工作也比较关键,如果出现电线安装混乱、长度不合理、排线不美观的情况,会影响到整个电气系统的效率和质量。本文探讨了电力线路导线碰线故障的主要原因,在此基础上探讨并研究了如何更好的处理电气安装中的二次接线问题。希望可以对电力线路的故障做好处理,促进电力行业可持续发展。
简介:Letφbeanormalfunctionon[0,1]andA~1(φ)theBergmanspacewithweightφ(|z|)/(1-|z|~2).AnatomicdecompositiontheoremforA~1(φ)isobtained,andanecessaryandnearly-sufficientconditionisgiventomakeasequenceofpointsinterpolateforA~1(φ).
简介:在这篇论文,我们与工作假期和假期打断学习M/M/1队列。工作假期最近被介绍,在哪个期间服务者能仍然以更低的率在原来的进行中的工作上提供服务。同时,我们介绍一个新policy:the服务器罐头一旦系统的一些索引例如顾客的数字,在假期时期完成某个值,从假期回到正常工作水平。没有完成假期,服务者可以从假期回来。如此的政策被称为假期打断。我们连接提及的上面二条政策并且假设如果在假期时期期间在在服务结束以后的系统有顾客,服务器将回到正常工作水平,嗨伪出生和死亡过程和矩阵几何的解决方案方法称为,我们为顾客和等待的时间的数字获得分布和随机的分解结构并且提供系统的一些索引。
简介:WestudyanM/PH/1queuewithphasetypeworkingvacationandvacationinterruptionwherethevacationtimefollowsaphasetypedistribution.Theserverservesthecustomersatalowerrateinavacationperiod.Theservercomesbacktotheregularbusyperiodataservicecompletionwithoutcompletingthevacation.Suchpolicyiscalledvacationinterruption.Intermsofquasibirthanddeathprocessandmatrix-geometricsolutionmethod,weobtainthestationaryqueuelengthdistribution.Moreoverweobtaintheconditionalstochasticdecompositionstructuresofqueuelengthandwaitingtimewhentheservicetimedistributionintheregularbusyperiodisexponential.
简介:Althoughthegreyforecastingmodelhasbeensuccessfullyadoptedinvariousfieldsanddemonstratedpromisingresults,theliteraturesshowitsperformancecouldbefurtherimproved,suchasfortheDGM(1,1)model,basedonaconcavesequence,themodelingerrorwillbelarger.Inthispaper,firstlythedefinitionofsequenceconvexityisgivenout,anditisprovedthattheoutputsequenceofDGM(1,1)modelisaconvexsequence.Next,theresidualchangelawofDGM(1,1)modelbasedontheconcavesequenceisdiscussed,andthenon-equidistanceDGM(1,1)modelisproposed.Finally,byintroducingthesymmetrytransformation,aconcavesequenceistransformedintoaconvexsequence,calledthesymmetricsequenceoftheconcavesequence,andthenconstructthenon-equidistanceDGM(1,1)modelbasedontheconvexsequence.Theexampleresultsshowthatthenovelmethodismoreaccuratethanthedirectmodelingforaconcavesequence.
简介:Inthispaper,westudytheexistenceof0-1universalminimaltotaldominatingfunctionsinagraph.Weestablishaformulationoflinearinequalitiestocharacterizeuniversalminimaltotaldominatingfunctionsandshowthatforakindofgraphswhoseadjacentmatricesarebalanced,theexistenceofuniversalminimaltotaldominatingfunctionscoincideswiththatof0-1ones.Itisalsoprovedthatforgeneralgraphs,theproblemoftestingtheexistenceof0-1universalminimaltotaldominatingfunctionsisNP-hard.
简介:Inthispaper,weanalyzeabulkinputM[X]/M/1queuewithmultipleworkingvacations.Aquasiuppertriangletransitionprobabilitymatrixoftwo-dimensionalMarkovchaininthismodelisobtained,andwiththematrixanalysismethod,highlycomplicatedprobabilitygeneratingfunction(PGF)ofthestationaryqueuelengthisfirstlyderived,fromwhichwegotthestochasticdecompositionresultforthestationaryqueuelengthwhichindicatestheevidentrelationshipwiththatoftheclassicalM[X]/M/1queuewithoutvacation.ItisimportantthatwefindtheupperandthelowerboundsofthestationarywaitingtimeintheLaplacetransformorderusingthepropertiesoftheconditionalErlangdistribution.Furthermore,wegainthemeanqueuelengthandtheupperandthelowerboundsofthemeanwaitingtime.
简介:IntheexistingliteratureofRepairableQueueingSystems(RQS),i.e.,queueingsystemswithserverbreakdowns,itisalmostallassumedthatinterarrivaltimesofsuccessivecustomersareindependent,identicallyexponentiallydistributed.Inthispaper,wedealwithmoregenericsystemGI/PH/1withserver'sexponentialuptimeandphase-typerepairtime.Withmatrixanalysistheory,weestablishtheequilibriumconditionandthecharacteristicsofthesystem,derivethetransientandstationaryavailabilitybehaviorofthesystem.
简介:摘要随着工程项目规模越来越大,高层建筑越来越高,建设方又极力限制变电所数量,使供电距离越来越长。对超长线路和设备如何保护?本文提出解决方案,供大家探讨。