简介:ThepaperestablishestwostochasticSIRSmodelswithjumpstodescribethespreadofnetworkvirusbycyberwar,terrorismandothers.First,addingrandomperturbationsproportionallytoeachvariable,wegetthedynamicpropertiesaroundthepositiveequilibriumofthedeterministicmodelandtheconditionsforpersistenceandextinction.Second,givingarandomdisturbancetoendemicequilibrium,wegetastochasticsystemwithjumps.BymodifyingtheexistingLyapunovfunction,weprovethepositivesolutionofthesystemisstochasticallystable.
简介:这调查由白噪音途径瞄准各向异性的fractionalBrownian随机地的新构造。而且,我们调查它的分发和样品性质(增长的静止,自我类似,样品连续性)它将供应一些有用看法到未来应用。
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简介:Thisworkdevelopsnear-optimalcontrolsforsystemsgivenbydifferentialequationswithwidebandnoiseandrandomswitching.Therandomswitchingismodeledbyacontinuous-time,time-inhomogeneousMarkovchain.Underbroadconditions,itisshownthatthereisanassociatedlimitproblem,whichisaswitchingjumpdiffusion.Usingnear-optimalcontrolsofthelimitsystem,wethenbuildcontrolsfortheoriginalsystems.Itisshownthatsuchconstructedcontrolsarenearlyoptimal.