简介：Inthisstudy,weconsidertheemergenceofexplosivesynchronizationinscale-freenetworksbycon-sideringtheKuramotomodelofcoupledphaseoscillators.Thenaturalfrequenciesofoscillatorsareassumedtobecorrelatedwiththeirdegreesandfrustrationisincludedinthesystem.Thisassumptioncanenhanceordelaytheexplosivetransitiontosynchronization.Interestingly,ade-synchronizationphenomenonoccursandthetypeofphasetransitionisalsochanged.Furthermore,weprovideanana-lyticaltreatmentbasedonastargraph,whichresemblesthatobtainedinscale-freenetworks.Finally,aself-consistentapproachisimplementedtostudythede-synchronizationregime.Ourfindingshaveimportantimplicationsforcontrollingsynchronizationincomplexnetworksbecausefrustrationisacontrollableparameterinexperimentsandadiscontinuousabruptphasetransitionisalwaysdangerousinengineeringintherealworld.

简介：Basedon3DBiot’sconsolidationtheoryandnonlinearDuncan-Chang’smodel,a3DFEM(finiteelementmethod)programisdevelopedconsideringthecouplingofgroundwaterseepageandsoilskeletondeformationduringexcavation.Thecomparisonbetweentheanalysisresultconsideringthevariationofwaterheaddifferenceandthatwithoutconsideringitshowsthattheporewaterpressuredistributionoftheformerisdistinctlydifferentfromthatofthelatterandthatthefoundationpitde-formationsoftheformerarelargerthanthoseofthelatter,sothattheresultwithoutconsideringthevariationofwaterheaddif-ferenceisunreliable.Thedistributionrulesofsoilhorizontalandverticaldisplacementsaroundthepitandexcessporewaterpressureareanalyzedindetailintimeandspace,whichisverysignificantforguidingundergroundengineeringconstructionandensuringenvironmentsafetyaroundthepit.

简介：Theeffectsoftheconstantexcitationonthelocalbifurcationoftheperiodicsolutionsinthe1:2internalresonantsystemswereanalyzedbasedonthesingularitytheory.Itisshownthattheconstantexcitationmakeinfluenceonlywhenthereexistsomenonlinearterms,intheoscillatorwithlowerfrequency.Besidesactingasmainbifurcationparameter,theconstantexcitation,togetherwithcoefficientsofsomenonlinearterms,maychangethevaluesofunfoldingparametersandthetypeofthebifurcation.Underthenon-degeneratecases,theeffectofthethirdordertermscanbeneglected.

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简介：Grapheneisthestrongestmaterialbutitsperformanceissignificantlyweakenedbyvacancydefects.Weusemoleculardynamicssimulationstoinvestigatethetensilebehaviorofagraphenewhichcontainsasinglevacancydefect.Ourresultssuggestthatbecauseofthesinglevacancy,thefracturestrengthofgraphenelossesabout17.7%.Thestressconcentrationaroundthevacancydefectleadstothedestructionofnearbysix-memberringsstructure,whichformstheinitialcrack.Thepropagationdirectionofthiscrackindefectivegrapheneisatanangleof60°tothetensiledirectioninitially,butthenbecomesperpendiculartothetensiledirection.

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简介：Surfaceeffectsonthepersistencelengthofquasi-one-dimensionalnanomaterialsareinvestigatedbyusingthetheoryofsurfaceelasticityandthecore–shellmodelofnanobeams.Asimpleandunifiedexpressionisprovidedtodeterminethepersistencelengthofnanowiresandnanotubeswithanyregularpolygonalcross-sections.Itisdemonstratedthatsurfaceeffectshaveadistinctinfluenceonthepersistencelengthwhenthecharacteristicsizesofmaterialsshrinktonanometers.Thisworkishelpfulnotonlyforunderstandingthesize-dependentbehaviorofnanomaterialsbutalsoforthedesignofdevicesbasedonnanotubesornanowires.

简介：AnSMIBmodelinthepowersystems,especiallythatconceringtheeffectsofhardlimitsonbifurcations,chaosandstabilityisstudied.Parameterconditionsforbifurcationsandchaosintheabsenceofhardlimitsarecomparedwiththoseinthepresenceofhardlimits.Ithasbeenprovedthathardlimitscanaffectsystemstability.Wefindthat(1)hardlimitscanchangeunstableequilibriumintostableone;(2)hardlimitscanchangestabilityoflimitcyclesinducedbyHopfbifurcation;(3)persistenceofhardlimitscanstabilizedivergenttrajectorytoastableequilibriumorlimitcycle;(4)HopfbifurcationoccursbeforeSNbifurcation,sothesystemcollapsecanbecontrolledbeforeHopfbifurcationoccurs.Wealsofindthatsuitablelimitingvaluesofhardlimitscanenlargethefeasibilityregion.Theseresultsarebasedontheoreticalanalysisandnumericalsimulations,suchasconditionforSNBandHopfbifurcation,bifurcationdiagram,trajectories,Lyapunovexponent,Floquetmultipliers,dimensionofattractorandsoon.

简介：ItiswellknownthatsplinesmoothingestimatorrelatestotheBayesianestimateunderpartiallyinformativenormalprior.Inthispaper,wederivetheconditionsfortheproprietyoftheposteriorinthenonparametricmixedefectsmodelunderthisclassofpartiallyinformativenormalpriorforfxedefectwithinversegammapriorsonthevariancecomponentsandhierarchicalpriorsforcovariancematrixofrandomefect,thenweexploretheGibbssamplingprocedure.

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简介：Theionsaturationcurrentisveryimportantinprobetheory,whichcanbeusedtomeasuretheelectrontem-peratureandthefloatingpotential.Inthiswork,theeffectsofenergeticionsontheionsaturationcurrentarestudiedviaparticle-in-cellsimulations.Itisfoundthattheenergeticionsandbackgroundionscanbetreatedseparatelyasdifferentspecies,andthevsatisfytheirindividualBohmcriterionatthesheathedge.

简介：Acousticimpulsesproducedthroughthemechanismofthelaser-inducedbreakdowninwaterhavebeeninvestigatedintherangefrom0℃toroomtemperature.Differentlyfromtheacousticimpulsesproducedviathermalexpansion,thepolarityandtheamplitudeofacousticimpulseproducedvialiquidbreakdownmechanismdonotchangewithwatertemper-ature.Thisindirectlyprovesthattheproductionofacousticimpulseisduetotheexpansionofthecavityitselfwhichincludesplasma.Asemiempiricaldescriptionofthisphenomenonisgiveninthispaper.

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简介：在轻原子核的簇结构的学习在这些年里正在延长到重原子核。至于稳定的N=Z原子核，从更轻的8，12C原子核到更重的20Ne甚至40Ca和44Ti中等原子核，簇结构好学习并且证实。在重原子核，由于统治吝啬的领域，簇结构的存在不作为轻原子核清楚，但是一些线索被作出对有利的裁决特别地，在一些原子核显示core+簇结构208在212Po。我们在重原子核关于聚类的效果的理论、试验性的探索考察某最近的进步。我们也从腐烂的看法讨论重原子核的可能的簇结构。

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简介：TheeffectsofσandΦmesonsonthesurfaceredshiftofaneutronstarhavebeeninvestigatedwithintheframeworkofrelativisticmeanfieldtheoryforthebaryonoctet{n,p,Λ,Σ,Σ0,Σ+,Ξ,Ξ0}system.ItisfoundthatcomparedwiththosewithoutconsideringthecontributionsofσandΦmesons,thesurfaceredshiftdecreasesandthatcorrespondingtothemaximumvalueofthemassalsodecreasesfrom0.2540to0.2236,aboutby12%.Meanwhile,itisalsofoundthatincludingσandΦmesons,theM/Randthatcorrespondingtothemaximummassdecrease.