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69 个结果
  • 简介:Thispaperpresentsaschemetoidentifyandcompensatethetimingmismatchesbetweentwochannelsfortimeinterleavedphotonicanalog-to-digitalconverters(TIPADCs).Theimpactofelectro-opticsamplingisremovedbypreprocessingfirstly.ThenacalibrationmethodcombiningchoppingprocessingandaHilberttransformisproposedtoidentifythetimingmismatches,whichcanbefurthercompensatedbyusingvariousmaturecompensationalgorithms.Theprincipleoftheproposedmethodisderivedtheoretically.Theperformanceoftheschemeisanalyzedbysimulation.Theresultsshowthattheharmonicinducedbytimingmismatchescanbesuppressedbymorethan30dBusingtheproposedcorrectionscheme.

  • 标签: CORRECTION PHOTONIC analog-to-digital CONVERTERS TIMING
  • 简介:Characteristicslipandcharacteristicearthquakemodelshavebeenproposedforseveraldecades.Suchmodelshavebeensupportedrecentlybyhigh-resolutionoffsetmeasurements.Thesemodelssuggestthatslipalongafaultrecursviasimilarlysized,largeearthquakes.Theinter-eventstrainaccumulationrate(ratioofearthquakeslipandprecedinginterseismictimeperiod)isusedheretotestthecharacteristicearthquakemodelbylinkingtheslipandtimingofpastearthquakesontheHaiyuanFault.Weaddresshowtheinter-eventstrainaccumulationratevariesovermultipleseismiccyclesbycombiningpaleoearthquakestudieswithhigh-resolutionairbornelightdetectionandranging(LiDAR)datatodocumentthetimingandsizeofpaleoearthquakedisplacementsalongthewesternandmiddlesegmentsoftheHaiyuanFault.Ourobservationsencompass5earthquakecycles.WefindsignificantvariationsovertimeandspacealongtheHaiyuanFault.WeobservethatonthemiddlesegmentoftheHaiyuanFaulttheratesslowdownorincreaseasananticorrelatedfunctionoftheratesofprecedingearthquakes.Here,weproposethattheinter-eventstrainaccumulationratesonthemiddlesegmentoftheHaiyuanFaultareoscillatingbothspatiallyandtemporally.However,alongthewesternsegment,theinter-eventstrainaccumulationrateisbothspatiallyandtemporallysteady,whichisinagreementwithquasi-periodicandslip-predictablemodels.Finally,weproposethatdifferentfaultsegmentswithinasinglefaultzonemaybehaveaccordingtodifferentearthquakemodels.

  • 标签: HAIYUAN FAULT LiDAR inter-event strain ACCUMULATION
  • 简介:WeconsideranM/M/2queueingsystemwithtwo-heterogeneousserversandmultiplevacations.CustomersarriveaccordingtoaPoissonprocess.However,customersbecomeimpatientwhenthesystemisonvacation.Weobtainexplicitexpressionsforthetimedependentprobabilities,meanandvarianceofthesystemsizeattimetbyemployingprobabilitygeneratingfunctions,continuedfractionsandpropertiesofthemodifiedBesselfunctions.Finally,twospecialcasesareprovided.

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  • 简介:作为在bioethanol生产的设备的一关键片,煮坦克通常被用来保证液化的一致性。在这份报纸,我们建议煮坦克保证在一个大规模过程作为伪塞子流动知道的淀粉泥浆流动的一种类型的一种新奇类型。在流动地的分析,我们使用了计算液体动力学(CFD)。模仿液体固体二阶段的流动,我们基于粒子动力学选择了一个Euler-Euler模型。我们在流动地上调查了几个关键结构的参数的效果。结果与12,800为一辆坦克显示出那?在高度的公里并且1000?在从0潰楳楴湯?瑳畲瑣牵?湡??晲捡?潭灲潨潬祧戠?的直径,优化入口试管角度和入口试管直径范围的公里?慲?楤晦慲瑣潩?攠敮杲?楤灳牥楳敶堠爭祡猠数瑣潲敭牴??卄?堠爭祡瀠潨潴汥'虪箿e数瑣潲捳灯?猠慣湮湩?汥'虪箿珱^驿麙盏?匨??琠慲獮業獳潩?汥'虪箿珱^驿麙盏??卄攠敬敭瑮污洠灡楰杮吗??

  • 标签: 乙醇生产 流动域 坦克 二阶 CFD 粒子动力学
  • 简介:1.ObjectivesSouthernQinghai-northemTibetpermafrostregionisaplacehavingthemostwidespreadandmostdevelopedpermafrostinChinawithgoodmineralizationconditionsandprospectingpotentialsforgashydrate(ZhuYHetal.,2011).In2011,ChinaGeologicalSurveyinitiatedaspecialnationalprogramentitled"Gashydrateresourceexplorationandtrialmining",whichsignaledapreludetoacomprehensivegashydratesurveyinsouthernQinghai-northernTibetpermafrostregion.Sofar,appreciableprogresshasbeenmadeinthegeological,geophysical,geochemicalanddrillingsurveyacrossanumberofkeyblocks.Thispaperisintendedtoexaminethefundamentalconditionsforgashydratemineralizationbasedonpreviousfindings,delineatefavorablezonesforgashydratemineralization,andtomakecontributionstotheonshoregashydrateresourceexplorationinChina.

  • 标签: NEW DELINEATION TWO favorable ZONES gas
  • 简介:Pointabsorberwaveenergydevicewithmultipledegreesoffreedom(DOF)isassumedtohaveabetterabsorptionabilityofmechanicalenergyfromoceanwaves.Inthispaper,acoaxialsymmetricarticulatedpointabsorberwaveenergyconverterwithtwodegreesoffreedomispresented.Themechanicalequationsoftheoscillationbuoywithpowertake-offmechanism(PTO)inregularwavesareestablished.Thethree-dimensionalnumericalwavetankisbuiltinconsiderationofthebuoymotionbasedupontheCFDmethod.Theappropriatesimulationelementsareselectedforthebuoyandwaveparameters.ThefeasibilityoftheCFDmethodisverifiedthroughthecontrastbetweenthenumericalsimulationresultsoftypicalwaveconditionsandtestresults.Insuchcase,thebuoywithsingleDOFofheave,pitchandtheircouplingmotionconsideringfree(noPTOdamping)anddampedoscillationsinregularwavesaresimulatedbyusingtheverifiedCFDmethodrespectively.Thehydrodynamicandwaveenergyconversioncharacteristicswithtypicalwaveconditionsareanalyzed.Thenumericalresultsshowthattheheaveandpitchcanaffecteachotherinthebuoycouplingmotion,hydrodynamicloads,waveenergyabsorptionandflowfield.ThetotalcapturewidthratiowithtwocoupledDOFmotionishigherthanthatwithasingleDOFmotion.ThewaveenergyconversionofacertainDOFmotionmaybehigherthanthatofthesinglecertainDOFmotioneventhoughthewaveisattheresonanceperiod.Whenthewaveperiodsarehighenough,theinteractionbetweenthecoupledDOFmotionscanbeneglected.

  • 标签: CFD simulation wave energy CONVERSION numerical
  • 简介:Thepenetrationdepthoftorpedoanchorintwo-layeredsoilbedwasexperimentallyinvestigated.Atotalof177experimentaldatawereobtainedinlaboratorybyvaryingtheundrainedshearstrengthofthetwo-layeredsoilandthethicknessofthetopsoillayer.Thegeometricparametersoftheanchorandthesoilproperties(theliquidlimit,plasticlimit,specificgravity,undrainedshearstrength,density,andwatercontent)weremeasured.Basedontheenergyanalysisandpresenttestdata,anempiricalformulatopredictthepenetrationdepthoftorpedoanchorintwo-layeredsoilbedwasproposed.Theproposedformulawasextensivelyvalidatedbylaboratoryandfielddataofpreviousresearchers.Theresultswereingoodagreementwiththoseobtainedfortwo-layeredandsingle-layeredsoilbed.Finally,asensitivityanalysisontheparametersintheformulawasperformed.

  • 标签: TORPEDO ANCHOR PENETRATION DEPTH two-layered soil
  • 简介:Inthispaper,westudyacentralizedsupplychainforatwo-stagewithsellingpricediscount.Thissupplychainconsistsofasupplierandaretailer.Basedonthefeaturethattheproduct’ssellingseasonisshortandthesupplychainfacesgreatdemanduncertainty.Weconsideratwo-stagescenariowhere,atthebeginningofstage1,thesupplierreservesproductioncapacitybasedonhistoricdatainadvance,stage2comestousaftersomeleadtime,boththesupplierandtheretailerupdatethedemandinformation,theretailerthenplacesanordernotexceedingthereservedcapacitybasedontheselling-pricingdiscountdependentdemand.Wemakeoptimaldecisionsonthereservedcapacityinstage1,sellingpricediscountandorderquantityinstage2.Inthissupplychain,thepatterninstage2isfiguredoutfirst,andthenstage1isclearedaswell.Thenwepresentanumericalexampletogivesomeinsights.Finallywegetsomeconclusions.

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  • 简介:twospotted蜘蛛螨,TetranychusurticaeKoch有二种形式:绿形式和红形式。理解没有分叉的基因背景,这二种形式怎么建立了的分子的基础是一个吸引人的区域。作为一个著名epigenetic过程,DNAmethylation越过不改变基因背景的多样的有机体在基因规定和发展变化有特别地重要的角色。这里,T形成调查DNAmethylation是否能在二与不同phenotypic后果被联系。urticae,我们调查了genomewidecytosinemethylation地位和DNAmethyltransferase的表示水平3(Tudnmt3)在整个他们的全部生命周期。585loci的Methylationsensitive扩大多型性(MSAP)分析在不同发展阶段揭示了可变methylation模式。特别地,主要坐标分析(PCoA)显示在二种形式的女成年人之间的重要epigenetic区别。Tudnmt3的基因表示在所有检验发展阶段被检测,它在二种形式的成年阶段是显著地不同的。一起,我们的结果揭示在T的二种形式之间的epigenetic距离。urticae,建议DNAmethylation可能在不同发展要求被含有,并且在这二的成年阶段贡献不同显型形成。

  • 标签: 成年人 分叉 舞台 TWEEN DNA
  • 简介:这份报纸考虑通过离线、联机的隧道为一小部分房间的分发由一个宾馆和一个联机旅行代理人(OTA)组成的宾馆供应链。在商人合作假设下面,为无常建模并且要求克服分散的决定的劣势,二合作机制,也就是,一个二阶段的订合同和一种选择收缩,被介绍在宾馆供应链增加利润。这份报纸在不同合同模型下面调查宾馆和OTA的最佳的决定。而且,作者在不同模型下面在宾馆和OTA的利润上分析需求无常和需求可变性和宾馆能力的相互作用的效果。结果证明二阶段的订合同和选择合同能增加全部供应链和宾馆的利润;然而,仅仅当宾馆能力是相对小的,需求可变性大时,OTA的利润能通过二阶段的订合同和选择合同被增加;否则,二合作机制不能增加OTA利润。

  • 标签: 合作机制 供应链 宾馆 合同 二阶 OTA
  • 简介:理解森林生态系统土壤水分蒸发蒸腾损失总量(et)为水有限环境是关键的,特别地,缺乏象是的西北中国的更低的Heihe河盆那样的足够的确定的数据的那些首先由TamarixramosissimaLedeb统治了。并且PopuluseuphraticaOliv。森林。因此,我们为2选择了成长季节?在类似的气象学的条件到下面的二个如此的森林的年(2012和2014)比较et使用旋涡协变性(EC)技术。在成长季节期间,T的每日的et。ramosissima从0.3~8.0?公里?有3.6的一个平均数的天1?公里?天1,和P的每日的et。euphratica从0.9~7.9?公里?有4.6的一个平均数的天1?公里?为548和707的一个总数的天1?公里分别地。P的显著地更高的et。euphratica看台直接被连接高从灌溉在足够的水可获得性下面玷污蒸发率。当土壤蒸发被不顾时,水使用比得上二对比河边的森林,P。有465的全部的蒸发的euphratica森林?公里和T。有473的ramosissima森林?公里。回归分析证明气候因素在两种森林类型占了至少80%et变化。在结论,河边的森林的水使用在这个干旱区域低、可比较,建议长期的植物改编到水可获得性的本地气候和条件。

  • 标签: 土壤水分蒸发蒸腾损失总量 森林生态系统 中国 西北 长季节 气象学