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简介：ThecomparativenumericalandanalyticalanalysisofscintillationindicesofthevortexLaguerre–GaussianbeamandthenonvortexdoughnutholeandGaussianbeamspropagatingintherandomlyinhomogeneousatmospherehasbeenperformed.Ithasbeenfoundthatthedependenceofthescintillationindexattheaxisoftheopticalvortexontheturbulenceintensityatthepathhastheformofaunitstep.Ithasbeenshownthatthebehaviorofscintillationsinthecrosssectionsofvortexandnonvortexbeamsdifferswidely.DespitethescintillationindexofvortexbeamshasbeencalculatedonlyforthesimplestLG10mode,theobtainedresultsarequitegeneral,becausetheydemonstratethemainpropertiesinherentinscintillationsofvortexbeamsofanytype.

简介：在有损耗的媒介解决电磁的反的散布问题的一个混合方法被建议。坡度搜索方法首先被用来决定目标的空间分发，然后，蒙特卡罗方法被选择计算scatterer的传导性和介电常数。数字实验的结果证实联合二个方法的混合方法是高精确的，有效，并且适合到全球优化。[从作者抽象]

简介：在不同温度的非结晶的CuHf合金的结构的因素由使用高温度X光衍射计的redetermined。theshort范围顺序结构而且中等范围的顺序结构在非结晶的CuHfalloys存在，这被发现不仅。合金融化的CuHf的动态粘性被扭力的摆动粘度计测量。脆弱过热CuHf合金融化基于粘性数据被计算。形成CuHf的能力的玻璃是的试验性的结果表演仔细与脆弱有关他们的超级加热融化。在中等范围顺序结构和脆弱之间的关系过热融化也在非结晶的CuHfalloys被建立了。与supercooled液体的脆弱相对照，过热的液体的脆弱答应一条更好的途径到反映形成液体的玻璃的动力学。

简介：Inordertolocateareasonableheatingsystem,theaustenitegraingrowthbehaviorofNbmicroalloyedmediumcarbonsteelhasbeenexperimentallystudiedatvariousaustenitizingtemperaturesandfordifferentholdingtimes.Itisindicatedthataustenitegraingrowthincreaseswithincreasingaustenitizingtemperaturesandholdingtimes.Particularlywhentheaustenitizingtemperaturewasabove1100℃,austenitegrainsgrewrapidly,andanabnormalaustenitegraingrowthwasobserved.Whentheaustenitizingtemperaturewaslowerthan1100℃,austenitegrainsizeandgrowthrateweresmall.Theactivationenergyofgraingrowthinthetestedsteelis397679.5J/mol.Toensureanabsenceofcoarsegrainsinmicrostructures,theheatingtechnologyofthetestedsteelshouldbecontrolledfor1hat1100℃.Therelationshipsofausteniteaveragegrainsizewithsoakingtemperatureandtimeoftestedsteelwereobtainedbymathematicalcalculation,andausteniteaveragegrainsizewasfoundtobeinagreementwiththemeasuredsizefordifferentholdingtimes.

简介：Cerenkovwakeamplificationcanbeusedasanacceleratingscheme,inwhichatriggerbunchofelectronspropagatinginsideacylindricalwaveguidefilledwithanactivemediumgeneratesaninitialwakefield.Duetothemultiplereflectionsinsidethewaveguide,thewakemaybeamplifiedsignificantlymorestronglythanwhenpropagatinginaboundlessmedium.Sufficientlyfarawayfromthetriggerbunchthewake,whichtravelswiththesamephasevelocityasthebunch,reachessaturationanditcanaccelerateasecondbunchofelectronstrailingbehind.ForaCO2gasmixtureournumericalandanalyticalcalculationsindicatethatashortsaturationlengthandahighgradientcanbeachievedwithalargewaveguideradiusfilledwithahighdensityofexcitedatomsandatriggerbunchthattravelsatavelocityslightlyabovetheCerenkovvelocity.Toobtainastablelevelofsaturatedwakethatwillbesuitableforparticleacceleration,itiscrucialtosatisfythesingle-moderesonancecondition,whichrequireshighaccuracyinthewaveguideradiusandtheratiobetweentheelectronphasevelocityandtheCerenkovvelocity.Forsingle-modepropagationourmodelindicatesthatitisfeasibletoobtaingradientsashighasGVm-1inawaveguidelengthofcm.

简介：Themarinemedium-speeddieselenginesarestartedbytwomethods;oneistheelectricmotors,andtheotherairstartingmotors.Eventhoughairstartingmotorisdependentoftheenginetypesandsizes,ithasbeenwidelyusedinthisareaduetoitssimplicity,convenienceandreliability.Thepurposeofthispaperistogivethedesigningparametersinordertomakeaproper'AirStartingMotor'usingCFD.Theaerodynamicapproachesweregiventounderstandtheinternalflowcharacteristicsoftheairstartingmotor.Inaddition,wehavecarriedouttheinvestigationofeffectsoftipclearance.Inthecalculationsthetipclearanceofairstartingmotorhasbeenvariedbetween0,2.8,4.3and5.7%ofbladespan.Theresultsofcomputationarethetipclearanceincreasedto2.8%,thetorquedecreased24%,andtherewasnomorelargechangeswhentheclearancesincreasedto4.3%and5.7%.

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简介：在多孔的媒介调查传送对流，多孔的媒介从底部加热了的浸透的一液体的水平静止的层数字地用单个lattice-Boltzmann方法(LBM)被学习，概括Navier司烧Nithiarasu等建议的方程。[P。Nithiarasu，K.MSeetharamu，和TSundararajanInt。J。加热集体Trans。40(1997)3955]。由于变成稀薄，边界条件被看作两温度跳并且速度滑倒。计算结果对分析结果被验证，并且优秀同意被获得了。结果证明了瑞利数字与增加温度被增加跳，温度的稳定效果比速度的更重要滑倒，并且现在的模型的计算稳定性比Darcy和Brinkman模型的好。

简介：Fig.1showstheimpactparameter-averagedasymptoticvaluesofthenumberoftheemittedneutronsN_nandthenumberoftheemittedprotonsN_p(whenthevaluesofN_pandN_natt=200fm/cbecomenearlyconstants)i.e.b(topwindow)andb(bottomwindow)asafunctionofthebeamenergywithmomentumdependentintractionforthesystems~(76)Kr+~(40)Ca(leftwindows)and~(76)Kr+~(76)Kr(rightwindows)infivecases:

简介：Fe:BiOx电影被与在房间温度从80～200W增加劈啪作响的力量在氩空气下面一个BiFeO目标劈啪作响的rf磁控管在K9玻璃底层上制作。在160W的劈啪作响的力量种的薄电影能以适当免职率被形成并且有改进表面形态学，这被发现。XPS结果表明调查的电影由双性人，Fe和O元素组成。一个典型XRD模式证明没有阶段转变发生在这些电影直到400?吗？？

简介：Extractionofthein-mediumpropertiesofstrangeparticlesfromheavy-ioncollisionsisverycomplicated,sincehenucleardensityvariesintheevolutionofnucleus-nucleuscollisions.Toavoidtheuncertaintiesofthebaryonensitiesduringthestageofstrangeparticleproduction,onecaninvestigateproton-nucleuscollisionswheretheucleardensityisdefinitearoundthesaturationdensity.DynamicsofstrangeparticlesproducedintheprotoninduceduclearthereactionsnearthethresholdenergieshasbeeninvestigatedwithintheLanzhouquantumoleculardynamics(LQMD)transportmodel.Thein-mediummodificationsonparticleproductionindensenuclearmatterareconsideredthroughthecorrectionstotheelementarycrosssectionsviatheeffectivemassandhemean-fieldpotentials[1].

简介：Theinfluenceofdirectquenching(DQ)onmicrostructureandmechanicalpropertiesof0.19C-1.7Si-1.0Mn-0.05Nbsteelwasstudied.Themicrostructureandmechanicalpropertiesofreheatquenchedandtempered(RQ&T)steelplatewerecomparedwiththoseofdirectquenchedandtempered(DQ&T)steelplateswhichwerehotrolledatdifferentfinishrollingtem-peratures(1173Kand1123K),i.e.,recrystallization-controlled-rolleddirect-quenched(RCR&DQ)andcontrolled-rolleddirect-quenched(CR&DQ),respectively.Thestrengthsgenerallyincreasedinthefollowingorder:RQ&T

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简介：WereportontheexperimentalrealizationofCerenkovsum-frequencygenerationacrossthematerialdispersioninaone-dimensional,periodicallypoledferroelectriccrystal.Threeschemesofsum-frequencygeneration,confinedonlyinthevicinityofdomainwallsandintheformofnonlinearCerenkovradiation,aredemonstratedinnormal,degenerated,andanomalous-dispersion-likeconfigurations.Weexploittheirphase-matchinggeometries,whichexhibitawholescenariooftheevolutionofCerenkovradiationvaryingwiththedispersionrelationshipamongtheinteractionwaves.Inaddition,twosetsofconicalsum-frequencygenerationwithdifferentradiusandcenteraredemonstrated,whichresultfromscatteringassistantphase-matchingprocesses.

简介：Thediscrete-ordinatesmethodisasimple,accurateandoflittlecomputationaltimesolutiontopredicttheradiactiveheattransferinthecombustionchambers,Inthispaper,three-dimensionradiativeproblemsforabsorbing-emitting-scatteringmediumaremodeledusingthismethodintherectangularenclosure.Andinaddition,newdiscrete-ordinatesaredevelopedtostudytheabsorbing-emitting-scatteringradiationprocessesforcomplexphasefunction.Thereasonableresultscanbeobtainedthoughthesenewordinates,yetthedeviatedresultsareonlyobtainedthroughconventionalSnordinates.

简介：Theintensitydistributionsofahigh-powerbroadbandlaserbeampassingthroughanonlinearopticalmediumwithdefectsandthenpropagatinginfreespaceareinvestigatedbasedonthegeneralnonlinearSchr¨odingerequationandthesplit-stepFouriernumericalmethod.Theinfluencesofthebandwidthofthelaserbeam,thethicknessofthemedium,andthedefectsonthelightintensitydistributionarerevealed.Wefindthatthenonlinearopticaleffectcanbesuppressedandthattheuniformityofthebeamcanbeimprovedforahigh-powerbroadbandlaserbeamwithappropriatewidebandwidth.Itisalsofoundthat,underthesameincidentlightintensity,athickermediumwillleadtoastrongerself-focusingintensity,andthattheinfluenceofdefectsintheopticalelementsontheintensityisstrongerforanarrowbandbeamthanforabroadbandbeam.

简介：Wedemonstratetheefficientgenerationofcoherentlightinafour-leveldouble-cascadeatomicmediumbycontinuous-wavelow-intensitylaserradiation.Wederivethecorrespondingexplicitanalyticalexpressionsforthegeneratedfour-wavemixing(FWM)field.DependenciesoftheintensityofthegenerateFWMfieldonthepropagationdistance,ontheinput-waveintensity,andonthephotondetuningareinvestigated.Toconclude,wealsogiveabriefdiscussionontheexperimentalrealizationoftheproposedscheme.

简介：WehavestudiedthefragmentationprocessinheavyioncollisionssystematicaIlybyusingIsospin-dependentQuantumMolecularDynamics(IQMD)modelandfoundthatthemultiplicityofintermediatemassfragmentsN_(imf)canbeusedasaprobetoextracttheinformationofin-mediumnmuleon-nucleoncrosssection.Fig.1shows

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