简介：影印石版术实验与electrooptically悦耳的阶段步借助于一个光阶段面具被执行。阶段面具由转换铁电体领域的六角形的格子在z切割锂niobate底层上制作了的2-dimensional组成。电镀物品光学地悦耳的阶段步在转换领域之间，被一个外部电场的应用程序经由透明电极沿着水晶的z轴获得。氩激光的瞄准横梁通过阶段面具和近的领域紧张模式，在Talbot长度并且为应用电压的不同价值的不同飞机，被用于光刻的实验。初步的结果被显示出，进一步的应用被讨论。这研究部分是的CLC数字TN305在FIRB工程以内由MIUR资助了(没有。RBNE01KZ94)并且部分由MIUR工程(号码77DDN.1105/2002)。

简介：Acoherence-basedcorrectionmethodwasproposedinordertoimprovethelateralresolutionandenhancethecontrastofmedicalultrasoundimaginginthepresenceofphaseaberration.Theaveragedcoherencefactorwasproposedatfirstandusedasametrictoevaluatephaseaberrationcorrection.Bymaximizingtheaveragedcoherencefactor,thetimedelayparameterofeachchannelwasadjusted.AnewsetofcoherencefactorswascalculatedandthecorrecteddatawasoptimizedtoformthefinalB-modeimage.Thesimulationsonpointtargetsandacystphantomshowedthattheproposedmethodoutperformedthenearestneighboringcrosscorrelationmethodandconventionalcoherence-weightingmethod,andthelateralresolutionandcontrastratiowasimprovedbyapproximately0.24mmand18dBrespectively.Theproposedmethodcombinedtheadvantagesofphaseerrorcorrectionandcoherence-weighting,whichcouldimproveimagingqualitieseffectivelyinmedicalultrasound.

简介：Ultrasoundimagingisthemostwidelyusednoninvasivemedicalimagingmodality.ItslatesteliteconceptisSuperharmonicImagingwhichisthemosttalked-aboutfutureofmedicaldiagnosticultrasound.Inthispaper,thecomputationalandanalyticalstudyforsuperharmonicfieldgenerationfromphasedarraytransducerof16×16elementsispresented.Forthis,themodelpreferred,includesthecalculationfordiffractioneffectinfrequencydomainandnonlineareffectintimedomain.Theattenuationisincludedalongwiththediffractioninfrequencydomainaswell.Thecomparativeanalysisofsuperharmonicfieldisalsocarriedoutwithsimulatedfundamentalandsecondharmonicfieldsbythesamemodel.Similarly,thecomparisonwiththeresultsfromtheliteratureisalsoreported.

简介：DonaldTrumpwasinauguratedasthe45thUSPresidentinJanuary2017.Asapresidentoutsideoftheestablishmentcamp,Trump’sgoverningconceptandpolicypreferenceshaveshowngreatdifferencefromthoseofhispredecessors.ThishasinevitablyaffectedtheUSagendaandpatternofinteractionwithChina.Meanwhile,thepolitical,economicandsocialchangesinbothChinaandtheUShavealsoinfluencedbilateralrelations,drivingatransitioninbilateralrelationsatadeeperlevel.TheChinapolicyoftheUnitedStateshasenteredanewphase,inwhichthecompetitionbetweenthetwocountrieshasbecomeevenintensified.ThisarticleaimstosummarizethefeaturesofChina-USrelationsduringthefirstyearofTrump’spresidency,identifychallengesofbilateralrelations,discussthecontentofSino-UScompetitiverelationsinthisnewstage,andanalyzethefeaturesandtrendsthatarelikelytocharacterizetheUnitedStates’Chinapolicyinthenearfuture.

简介：ChinaandCanadahavesignedaprojectawardagreementfortheco-operationfortheQinshanPhaseⅢCandunuclearpowerproject,markingsignificantprogressincommercialnegotiationsbetweenbothcountriesontheconstructionoftwo700megawattclassCanduunits.Theagreement,signedbetweentheChinaNationalNuclearCorp(CNNC)andtheAtomicEnergyofCanadaLtd(AECL)inBeijingonJuly12,finalizedthepriceandcommercialtermsforQinshanPhaseⅢ

简介：Thisreviewdealswiththepreparationandapplicationofpolymericsulfinateresinsasreactiveintermediateinsolidphaseorganicsynthesisandseparation.

简介：为第四级的系统lauric-N-methylglucamide(MEGA-12)的中间阶段的微乳液的阶段行为/n-butanol/alkane/water与Winsor类型被学习了，-似鱼、新奇-似鱼的阶段图。一系列阶段倒置Winsor我()III(3)II()为三种阶段图被观察。阶段类型，阶段卷和到中间阶段的微乳液的目的从开始的白酒集中的范围从Winsor阶段图被获得。从-似鱼的阶段图，物理化学的参数，，例如团，在hydrophile-lipophile的n-butanol的部分平衡界面的层开始的坐标和中间阶段的微乳液的结束点，和在链烷阶段的MEGA-12和n-butanol的溶解度被计算。小说-似鱼的阶段图也被论述。从这种图，上述试验性的现象被观察，物理化学的参数正是计算的。新奇似鱼的阶段图优于Winsor并且-在增溶的评估的似鱼的阶段图相关物理化学的参数的微乳液和计算驱动。

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简介：阶段地水晶(陆军)模型被用来模仿premelting脱臼运动对称当系统温度在时，在紧张行动下面倾斜谷物边界(STGB)远非，到融化的融化的点和结束分别地指。结果证明当premelting温度被接近到，本地premelting发生包围脱臼从在温度下面。STGB的premelting脱臼能在紧张行动下面滑行，并且premelting区域是为脱臼滑行的一个同伴。STGB腐烂的过程以二个高温度条件是很类似的。当premelting介绍，它减少为脱臼的滑行抵抗并且导致脱臼的一个更快的运动，并且也在STGB的腐烂过程期间引起系统的更多的精力减小。尽管有把紧张用于这些，premelting在STGB的整个腐烂过程取样，premelting脱臼区域显然不发展并且延长。这显示外部紧张行动不在高温度支持premelting，并且不能导致更多的premelting脱臼，它能在脱臼展览附近被欠到premelting阶段像液体的性质并且到容易滑行并且放松紧张精力的premelting脱臼；这与实验和分子的动力学的结果一致。

简介：Two-phase,immiscible,incompressibleflowinporousmediaisgovernedbyasystemofnonlinearpartialdifferentialequations.Inmostpracticalapplicationsconvectionphysicallydominatesdiffusion,andtheobjectofthispaperistodevelopafinitedifferencemethodcombinedwiththemethodofcharacteristicsandthelumpedmassmethodtotreattheparabolicequationofthedifferentialsystem.Thismethodisshownsatisfythemaximumprincipleanditserroranalysisispresented.

简介：Allexistingprotonexchangemembrane(PEM)fuelcellgasflowfieldshavebeendesignedonthebasisofsingle-phasegasflowdistribution.Thepresenceofliquidwaterintheflowcausesnon-uniformgasdistribution,leadingtopoorcellperformance.Thispaperdemonstratesthatagasflowrestrictor/distributor,asiscommonlyusedintwo-phaseflowtostabilizemultiphasetransportlinesandmultiphasereactors,canimprovethegasflowdistributionbysignificantlyreducinggasmal-distributioncausedbyeithernon-uniformwaterformationinparallelflowchannelsorflowinstabilityassociatedwithnegative-slopepressuredropcharacteristicoftwo-phasehorizontalflowsystems.

简介：Boilingandfoulingaretakenastypicalexamplesofnewphaseformationprocesstobeanalyzedanddiscussedinthispaper.Theprocessdynamicsofnucleateboilingisanalyzedanditsmechanismisdiscussedfromtheviewpointofself-organization.Fouling,whichisamorecomplicatedphenomenonofnewphaseformation,involvesseriesofunderlyingprocesses.Themorphologyandfractalanalysisoffoulingonlow-energysurfaceandthatwithfoulinginhibitorsarestudiedanddiscussed.Itissuggestedthatconsideringtheprocessdynamics,fractalanalysisandself-organization,anewavenueofresearchshouldbefound.

简介：MicroChannelheatsinkswithtwo-phaseflowcansatisfytheincreasingheatremovalrequirementsofmodernmicroelectronicdevices.Oneoftheimportantaspectsassociatedwithtwo-phaseflowsinmicrochannelsistostudythebubblebehavior.However,intheliteraturemostofthereportspresentdataofonlyasinglechannel.Thisdoesnotaccountforflowmixingandhydrodynamicinstabilitythatoccursinparallelmicrochannels,connectedbycommoninletandoutletcollectors.Inthepresentstudy,experimentswereperformedforair-waterandsteam-waterflowinparalleltriangularmicrochannelswithabaseof200-300μm.Theexperimentalstudyisbasedonsystematicmeasurementsoftemperatureandflowpatternbyinfraredradiometryandhigh-speeddigitalvideoimaging.Inair-waterflow,differentflowpatternswereobservedsimultaneouslyinthevariousmicrochannelsatafixedvaluesofwaterandgasflowrates.Insteam-waterflow,instabilityinuniformlyheatedmicrochannelswasobserved.

简介：Experimentalresultsarepresentedforsuperfluid(HeⅡ)flowthroughporousplugliquid-vaporphaseseparators.Testshavebeenperformedonsevenporousplugswithdifferentthicknessesordifferentpermeabilities.Thetemperaturewasmeasuredfrom1.5Kto1.9K.Twoflowregionswereobservedinsmallandlargepressureandtemperaturedifferencesregionsrespectively.Theexperimentaldataarecomparedwiththeoreticalpredictions.Theperformanceandapplicabilityofthebasictheoryarediscussed.Hysteresisoftheflowrateisalsoobservedanddiscussed.

简介：Inordertoexaminetheeffectivenessofengineeringprotectionagainstlocalizedscourinfrontofthesouthgroin-groupoftheYangtzeEstuaryWaterwayImprovementProject,PhaseI,anundistort-edphysicalmodelonageometricscaleof1:250isbuiltinthisstudy,coveringtwogroinsandtheiradacentestuarineareas.Byuseofrinsingfix-bedmodelaswellaslocalizedmobile-bedmodel,theexperimentisundertakenunderbi-directionalsteadyflow.Accordingtotheexperimentalresults,waterwaydredgingleadstotheincreaseinsteramvelocity,theincreasebeinglargerduringtheebbthanduringtheflood.Con-structionoftheupstreamgroinhassomeinfluenceontheflowpatternsnearthedownstreamgroin.Local-izedscourinfrontofthegroin-headsiscontrolledmainlybyebbflow.Inthecaseofariverbedcomposedentirelyofsilt,thedepthsoflocalizedscourinfrontofthetwogroin-headsare27mand29m,respectively.Inreality,theunderneathsedimentoftheprototyperiverbedisclaywhosethresholdve

简介：Anewdual-fluidmodelconsideringphasetransitionandvelocityslipwasproposedinthispaperandtheCunninghamcorrectionwasusedinthedropletresistancecalculation.Thisdual-fluidmodelwasappliedtothenumericalsimulationsofwetsteamflowina2DLAVALnozzleandintheWhitecascaderespectively.Theresultsoftwosimulationsdemonstratethatthemodelisreliable.Meanwhile,thespontaneouscondensingflowinWhitecascadewasanalyzedanditinfersthattheirreversiblelosscausedbycondensationaccountsforthelargestshare(about8.78%ofinlettotalpressure)intotalpressurelosswhilethelosscausedbyvelocitysliptakesthesmallestshare(nearly0.42%),andanotherpartoftotalpressurelosscausedbypneumaticfactorscontributesalesssharethancondensation,i.e.almost3.95%ofinlettotalpressure.

简介：在这篇文章，我们在二维的强烈相关的费米子系统在量阶段转变上考察我们的最近的工作。我们由用细胞的动态吝啬地的理论(CDMFT)和连续时间的量蒙特卡罗算法的联合计算状态，两倍占有，和费密表面进化的密度讨论这些系统的metalinsulator转变性质。而且，我们由定义磁性的顺序参数探索每个状态的磁性。包括antiferromagnetic金属，顺磁的金属，Kondo金属，和铁磁性的绝缘体，有许多吸引人的量状态的富有的阶段图被作出对有利的裁决有强烈相关的费米子的二维的格子。我们相信我们的结果将导致真实材料的性质的更好的理解。

简介：ThepresentstudyinvestigatedtheinfluenceofhightemperatureoxidationandreductionpretreatmentsontheleachingrateofPanzhihuailmenite.Theas-pretreatedilmenitewasleachedwith20%HClat105℃.Theleachingprocesswascontrolledbythephasesandmicrostructuresthatevolvedduringthepretreatmentprocesses.Theleachingkineticsofpurehematite,ilmeniteandpseudobrookitewerecharacterizedtoclarifythephaseeffectontheiron-leachingrate;therateofironleachingoccursinthefollowingorderintheHClsolution:hematite（ferriciron）>ilmenite（ferrousiron）>>pseudobrookite（ferriciron）.Therefore,theoften-citednotionthatferrousirondissolvesfasterinHClsolutionsthanferricironwhenexplainingthepretreatmenteffectsisinaccurate.Moreover,theoxidationpretreatment（at600-1000℃for4h）cannotdestroythedensestructureofthePanzhihuailmenite.Therefore,theinfluenceexertedbytheoxidationontheleachingprocessisprimarilydeterminedbythephasechange;oxidationat600and700℃slightlyincreasedtherateofironleachingbecausetheilmenitewastransformedintohematite,whiletheoxidationat900-1000℃significantlyreducedtherateofironleachingbecauseapseudobrookitephaseformed.Thereductioneffectwassubsequentlyinvestigated;theas-oxidizedilmenitewasreducedunderH2at750℃for30min.Thereductionsignificantlyacceleratedtherateofsubsequentironleachingsuchthatnearlyalloftheironhaddissolvedafterleachingfor2hin20%HClat105℃.Thisenhancediron-leachingrateismainlyattributedtothecracksandholesthatformedduringthereductionprocess.

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简介：Thepurposeofthisresearchistoquantifytheeffectsofcompositionalandprocessingparametersonthemicrostructureandpropertiesofdualphasesteelproduceddirectlybyhotrollingandrapidcooling.Steelswiththebasecompositionof0.1%C,1.4%Si,and1.0%Mnwithadditionsof0.5%Crtoinfluencehardenability,0.04%Nbtoretardrecrystallizationinthelatterstagesofrolling,or0.02%Titoinhibitgraingrowthduringandafterreheatingwereinvestigated.Investigationwasmadetopredictmicrostructureevolutionandtocorrelatemicrostructurewithprocessingparameters.Theeffectsoftheimportantmicrostructureparameterssuchasferritegrainsize,martensitevolumefraction(VM)andmorphology(polygonalorfibrous)onthetensileandimpactpropertiesarediscussed.Multiplelinearregressionanalysisoftheultimatetensilestrengthhasshownthat,increasingVMandmartensitemicrohardnessandgrainrefinementofferritearethemajorcontributionstoincreasethestrengthofthesteel.Itwasfoundthatthedual-phasesteelproducedbycontrolledrollingprocess,withamicrostructurewhichconsistedoffinegrainedferrite(4μm)and35%～40%fibrousmartensite,presentedoptimumtensileandimpactpropertiesbecauseofenhancedresistancetocrackpropagation.