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简介：Top-downcrackinasphaltpavementshasbeenreportedasawidespreadmodeoffailure.Asolidunderstandingofthemechanismsofcrackgrowthisessentialtopredictpavementperformanceinthecontextofthicknessdesign,aswellasinthedesignandoptimizationofmixtures.UsingthecoupledelementfreeGalerkin(EFG)andfiniteelement(FE)method,top-downcrackpropagationinasphaltpavementsisnumericallysimulatedonthebasisoffracturemechanics.Aparametricstudyisconductedtoisolatetheeffectsofoverlaythicknessandstiffness,basethicknessandstiffnessontop-downcrackpropagationinasphaltpavements.Theresultsshowthatlongitudinalwheelloadsaredisadvantageoustotop-downcrackbecauseitincreasesthecompoundstressintensityfactor(SIF)atthetipoftop-downcrackandshortensthecrackpath,andthusthefatiguelifedescends.TheSIFexperiencesaprocess'sharplyascending—slowlydescending—slowlyascending—sharplyascendingagain'withthecrackpropagating.Thethickertheoverlayorthebase,thelowertheSIF;thegreatertheoverlaystiffness,thehighertheSIF.Thecrackpathishardlyaffectedbystiffnessoftheoverlayandbase.

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

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简介：Westudyoptomechanicallyinducedtransparencyinaspinningmicroresonator.Wefindthatinthepresenceofrotation-inducedSagnacfrequencyshift,boththetransmissionrateandthegroupdelayofthesignalarestronglyaffected,leadingtoaFano-likespectrumoftransparency.Inparticular,tuningtherotaryspeedleadstotheemergenceofnonreciprocalopticalsidebands.Thisindicatesapromisingnewwaytocontrolhybridlight–sounddeviceswithspinningresonators.

简介：Laser-inducedbreakdownspectroscopy（LIBS）isananalyticaldetectiontechniquebasedonatomicemissionspectroscopytomeasuretheelementalcomposition.LIBShasbeenextensivelystudiedanddevelopedduetothenon-contact,fastresponse,highsensitivity,real-timeandmulti-elementalde-tectionfeatures.ThedevelopmentandapplicationsofLIBStechniqueinAsiaaresummarizedanddiscussedinthisreviewpaper.TheresearchersinAsiaworkondifferentaspectsoftheLIBSstudyinfundamentals,dataprocessingandmodeling,applicationsandinstrumentations.Accordingtothecurrentresearchstatus,thechallenges,opportunitiesandfurtherdevelopmentofLIBStechniqueinAsiaarealsoevaluatedtopromoteLIBSresearchanditsapplications.

简介：Laser-induceddamageinfusedsilicaopticsgreatlyrestrictstheperformancesoflaserfacilities.Grayhazedamage,whichisalwaysinitiatedonceriapolishedoptics,isoneofthemostimportantdamagemorphologiesinfusedsilicaoptics.Inthispaper,thelaser-inducedgrayhazedamagesoffourfusedsilicasamplespolishedwithCeO_2,Al_2O_3,ZrO_2,andcolloidalsilicaslurriesareinvestigated.Foursamplesallpresentgrayhazedamageswithmuchdifferentdamagedensities.Then,thepolishing-inducedcontaminantandsubsurfacedamagesinfoursamplesareanalyzed.TheresultsrevealthatthegrayhazedamagescouldbeinitiatedonthesampleswithoutCecontaminantandareinclinedtoshowatightcorrelationwiththeshallowsubsurfacedamages.

简介：Itiswellknownthatvanadiumalloywillfacetostrongneutronirradiationandhydrogenenvironmentsasastructuralmaterialinafusionreactor.Someresearcheshavereportedthatvanadiumalloytookstronglyhardeningafteranexposuretohydrogenenvironmentandirradiationbyneutronatatemperaturelowerthan400℃.Theductilityofthealloywaslostlargely,evenentirelybrittlefractureoccurredsometimesintensionloadingofthealloy.Therefore,it'stogettheknowledgeofthehardeningmechanismandthefracturemechanicalforthepurposetoimprovetheperformancesofthealloyunderthecircumstances.

简介：我们由导致激光的故障光谱学(解放)的炸药的察觉上的最近的工作在这份报纸被考察。我们学习了器官的炸药的导致激光的血浆的物理机制，TNT。在单个光子的刺激下面的TNT的解放系列用MATLAB被模仿。碳，氢，氧，和氮对血浆温度的原子排放线紧张的变化也被模仿。我们也调查普通无机的爆炸、黑粉末的解决时间的解放系列，在二种包围气氛，表情和氩，并且发现黑色的O原子排放线SBR的最大的价值搽粉发生在596ns的门延期。我们的工作的另一个焦点在使用象原则部件分析(PCA)和部分最少的广场判别式分析(PLS-DA)那样的chemometic方法把器官的炸药与象塑料那样的器官的材料区分开来上。为分类的一个PLS-DA模型被造。TNT和塑料的七种类型被选择为样品测试模型。试验性的结果证明解放结合了chemometric技术有能力从塑料区别器官的炸药。

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简介：WeproposeaschemetocoherentlycontrolspinsqueezingofatomicBose-Einsteincondensate（BEC）viathetechniqueofelectromagneticallyinducedtransparency（EIT）.Westudyquantumdynamicsofthemeanspinvectorandspinsqueezing.ItisshownthatthemeanspinvectorandspinsqueezingoftheBECcanbecontrolledandmanipulatedbyadjustingtheexternalcouplingfieldsor/andinternalnonlinearinteractionsoftheBEC.Itisindicatedthatthespinsqueezingcanbegeneratedrapidlyinthedynamicalprocessandmaintainedinalongtimeinterval.ItisfoundthatalargereffectiveRabicouplingbetweenatomsandlaserscanproduceastrongerspinsqueezing,andthesqueezingcanmaintainalongertimeinterval.

简介：OurexperimentsshowthatexternalfocusingandinitiallaserenergystronglyinfluencesfilamentgeneratedbythefemtosecondTi–sapphirelaserinair.Theexperimentalmeasurementsshowthefilamentlengthcanbeextendedbothbyincreasingthelaserenergyandfocallengthoffocusinglens.Ontheotherhand,theplasmafluorescenceemissioncanbeenhancedbyincreasingthelaserenergywithfixedfocallengthordecreasingthefocallength.Inaddition,thecollapsedistancemeasuredexperimentallyarelargerthanthecalculatedonesowingtothegroup-velocity-dispersioneffect.Inaddition,wefindthatthelinewidthsofthespectrallinesfromN2isindependentoffilamentpositions,laserenergiesandexternalfocusing.

简介：Stochasticresonance(SR)phenomenonofthesystemthatissubjecttotheasymmetrictwo-statenoiseisinvestigatedfromthebroadsense.Itisshownthattheamplitudesoftheoutputsignalexhibitthenon-monotonicdependenceontheinputsignalfrequencyω,andtheparametersdescribingtheasymmetrictwo-statenoise,suchasthetransitionrateλ,theorderparameterkdescribingtheasymmetricdegreeofthetwo-statenoise,andthenoisestrengthD.

简介：Near-fleldcoupledplasmonicsystemsgenerallyachieveplasmonicallyinducedtransparency（PIT）usingonlyone-waybright-darkmodecoupling.However,itischallengingtorealizesuchwell-designeddevices,mainlybecausetheydependsignificantlyonthepolarizationdirection.Weexploitsurfaceplasmonssup-portedbytwocrossedlayersofgraphenenanoribbons（GNRs）toachievedynamicallytunablePIT,whereeachGNRoperatesasboththebrightanddarkmodessimultaneously.TheproposedPITcanresultfromeitherone-waybright-darkmodeinteractionsorbidirectionalbright-brightandbright-darkmodehybrid-izedcouplingwhenthepolarizationisperpendicular/paralleloratanangletotheGNRs,respectively.Additionally,identicalribbonwidthsyieldpolarization-insensitivesingle-windowPIT,whereasdifferentribbonwidthsproducepolarization-dependentdouble-windowPIT.Weexaminetheproposedtechniqueusingplasmonwavefunctionsandthetransfermatrixmethod;analyticalandnumericalresultsshowex-cellentagreement.ThisstudycanprovidephysicalinsightintothePITcouplingmechanismsandadvancetheanulicabilitvandversatilityofPIT-basedsensingplatformsandotheractivedevices.

简介：因为免费表面旋涡吸收的空气在抽的系统上导致噪音，颤动，和成穴腐蚀，免费表面旋涡控制在一个泵池系统是重要的。在这研究，在泵吸入的免费表面旋涡和空气吸收的变化被部分(VOF)方法的体积与稳定的多相的流动模型一起调查了以便确切代表免费表面旋涡的行为。同类的免费表面模型被用来使用空气和水的相互作用。结果证明由免费表面旋涡运动的空气吸入能用空气体积部分的iso表面被设想。旋涡用免费表面做空气列到泵吸入。另外，免费表面旋涡能被安装窗帘墙控制，这被发现。

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简介：Opticaltrappingtechniquesholdgreatinterestfortheiradvantagesthatenabledirecthandlingofnanoparticles.Inthiswork,westudytheopticaltrappingeffectsofadiffraction-limitedfocalfieldpossessinganarbitraryphotonicspinandproposeaconvenientmethodtomanipulatethemovementbehaviorofthetrappednanoparticles.Inordertoachievecontrollablespinaxisorientationandellipticityofthetightlyfocusedbeaminthreedimensions,anefficientmethodtoanalyticallycalculateandexperimentallygeneratecomplexopticalfieldsatthepupilplaneofahighnumericalaperturelensisdeveloped.BynumericallycalculatingtheopticalforcesandtorquesofRayleighparticleswithspherical/ellipsoidalshape,wedemonstratethattheinteractionsbetweenthetunablephotonicspinandnanoparticlesleadtonotonly3Dtrappingbutalsoprecisecontrolofthenanoparticles’movementsintermsofstableorientation,rotationalorientation,androtationfrequency.Thisversatiletrappingmethodmayopenupnewavenuesforopticaltrappingandtheirapplicationsinvariousscientificfields.

简介：Thelaser-inducedrelativisticshockwavesaredescribed.Theshockwavescanbecreateddirectlybyahighirradiancelaserorindirectlybyalaseraccelerationofafoilthatcollideswithasecondstaticfoil.Aspecialcaseofinterestisthecreationoflaser-inducedfusionwherethecreatedalphaparticlescreateadetonationwave.Anovelapplicationissuggestedwiththeshockwaveorthedetonationwavetoigniteapre-compressedtarget.Inparticular,thedeuterium–tritiumfusionisconsidered.Itissuggestedthatthecollisionoftwolaseracceleratedfoilsmightserveasanovelrelativisticacceleratorforbulkmaterialcollisions.

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