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简介：SAT-basedboundedmodelchecking(BMC)hasbeenintroducedasacomplementarytechniquetoBDD-basedsymbolicmodelcheckinginrecentyears,andalotofsuccessfulworkhasbeendoneinthisdirection.TheapproachwasfirstintroducedbyA.Biereetal.incheckinglineartemporallogic(LTL)formulaeandthenalsoadaptedtocheckformulaeoftheuniversalfragmentofcomputationtreelogic(ACTL)byW.Penczeketal.Astheefficiencyofmodelcheckingisstillanimportantissue,wepresentanimprovedBMCapproachforACTLbasedonPenczek'smethod.Weconsidertwoaspectsoftheapproach.Oneisreductionofthenumberofvariablesandtransitionsinthek-modelbydistinguishingthetemporaloperatorEXfromtheothers.Theotherissimplificationofthetransformationofformulaebyusinguniformpathencodinginsteadofadisjunctionofallpathsneededinthek-model.Withtheseimprovements,foranACTLformula,thelengthofthefinalencodingoftheformulaintheworstcaseisreduced.TheimprovedapproachisimplementedinthetoolBMVandiscomparedwiththeoriginalonebyapplyingbothtotwowellknownexamples,mutualexclusionanddiningphilosophers.Thecomparisonshowstheadvantagesoftheimprovedapproachwithrespecttotheefficiencyofmodelchecking.

简介：Fuzzycontrolproblemsforsystemswithboundeduncertaindelayswerestudied.BasedonLyapunovstabilitytheoryandmatrixtheory,anonlinearstatefeedbackfuzzycontrollerwasdesignedbylinearmatrixinequalities(LMI)approach,andtheglobalexponentialstabilityoftheclosed-loopsystemwasstrictlyproved.Forafuzzycontrolsystemwithboundeduncertaindelays,undertheglobalexponentialstabilityconditionwhichisreducedtoplinearmatrixinequalities,thecontrollerguaranteesstabilityperformancesofstatevariables.Finally,thesimulationshowsthevalidityofthemethodinthispaper.

简介：由围住的控制的多重综合者的系统的全球稳定问题被考虑。由嵌套的浸透功能组成的一条非线性的反馈法律被建议。是交上的结果的修正和归纳的这类非线性的反馈法律[1]仅仅需要[(n+1)/2](n是系统的尺寸)浸透元素，它比那是少数另外的非线性的法律需要它。而且，当任何一个都没在控制法律的浸透元素被浸透时，靠近环的系统的杆能在左真实的轴上被放在任何地点上。这类非线性的控制法律展出更简单的结构并且能显著地改进靠近环的系统的短暂表演，并且比另外的存在方法很优异。一个第四顺序的系统上的模拟被用来验证建议方法。

简介：Somepreliminaryresultsonstrictboundedreallemmafortime-varyingcontinuouslinearsystemsareproposed,whereuncertaintyininitialconditions,terminalcostandextremeofthecostfunctionaredealtwithexplicitly.Basedontheseresults,anewrecursiveapproachisproposedinthenecessityproofofstrictboundedreallemmaforgeneralizedlinearsystemwithfinitediscretejumps.