简介：Modernsoftwaresystemsaresubjecttoacontinuousevolutionunderfrequentlyvaryingrequirementsandchangesinsystems＇operationalenvironments.Lehman＇slawofcontinuingchangedemandsforlong-livingandcontinuouslyevolvingsoftwaretoprolongitsproductivelifeandeconomicvaluebyaccommodatingchangesinexistingsoftware.Reusableknowledgeandpracticeshaveproventobesuccessfulforcontinuousdevelopmentandevolutionofthesoftwareeffectivelyandefficiently.However,challengessuchasempiricalacquisitionandsystematicapplicationofthereusableknowledgeandpracticesmustbeaddressedtoenableorenhancesoftwareevolution.Weinvestigatearchitecturechangelogs--mininghistoriesofarchitecture-centricsoftwareevolution--todiscoverchangepatternsthat1）supportreusabilityofarchitecturalchangesand2）enhancetheefficiencyofthearchitectureevolutionprocess.Wemodelarchitecturechangelogsasagraphandapplygraph-basedformalism（i.e.,graphminingtechniques）todiscoversoftwarearchitecturechangepatterns.Wehavedevelopedaprototypethatenablestool-drivenautomationanduserdecisionsupportduringsoftwareevolution.WehaveusedtheISO-IEC-9126modeltoqualitativelyevaluatetheproposedsolution.Theevaluationresultssuggestthattheproposedsolution1）enablesthereusabilityoffrequentarchitecturalchangesand2）enhancestheefficiencyofarchitecture-centricsoftwareevolutionprocess.Theproposedsolutionpromotesresearcheffortstoexploitthehistoryofarchitecturalchangestoempiricallydiscoverknowledgethatcanguidearchitecture-centricsoftwareevolution.