简介：Insuranceistheimportantaspectoffinance.Ithasbeenfullydevelopedinthewesterndevelopedcountries.Withthefastdevelopmentofmarketeconomyinourcountry,itisnecessarytointroducethealienmoderntheoriesandtechniques,andatthesametime,adaptthemtoourconcretesituation.Themodelofgenerallifeinsuranceproductistobeestablishedinthispaper,includingdeferredlifeannuities,increasingwholelifeinsuranceandreturnablepremiums.Thenthroughtheregulationofvariousparameters,wecanobtainvariousinsuranceproducts.

简介：WeanalysefurtherthereliabilitybehaviourofseriesandparallelsystemsinthesuccessivedamagemodelinitiatedbyDownton.Theresultsarecomparedwiththoseobtainedforothermodelswithdifferentbivariatedistributions.

简介：Assumeanunreliableworkstationperformingjobswitharandomservicetime,namely,itoccasionallybreaksdownbecauseofunexpectedinterruptions.Asaninterruptionreallyoccurs,thestationisinstantaneouslyrepairedandtheuncompletedjobisrestartedagainfromthebeginningtillajobiscompletedwithoutbeinginterrupted.ThetotalservicetimeisshowntobeNBUifandonlyifthetotaltimeittakestofinisheachjobwithinterruptionsisstochasticallylargerthanthatwithoutthem,irrespectiveofwhenandhowthebreakdownsoccur.Asanapplication,anonparametricprocedureisdevelopedtotestforthestrictNBUpropertyoftheservicetime.Finally,somenumericalsimulationsarepresentedaswell.

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