简介：Introduction:Middleearvolume(MEV)isaclinicallyrelevantparameteracrossmiddleeardiseases.MEVvaluesbetweenthesetechniqueshaveneverbeforebeentestedforagreementinearswithperforatedtympanicmembranes(TMs).Methods:Middleearswereidentifiedfrom36patientsranging18e89yearsofagewithTMperforationswhounderwenttympanometryandtemporalbonecomputedtomography(CT)between2005and2015.MEVscalculatedbybothtympanometryandthree-dimensionalvolumereconstruction(3DVR)wereanalyzedforagreementusingBlandAltmanplots.Thedifferencesbetweentympanometricand3DVRMEVvaluesforeachgivenmiddleearwerecharacterizedacrossMEVquartiles(1?smallest;4?largest)andacrossincreasingstatesofmiddleeardiseaseusingKruskaleWallisandWilcoxontestingwithBonferronicorrection.Results:BlandAltmanplotsdemonstratedsignificantdisagreementbetweenMEVmeasurementtechniques.Differencesbetweentympanometric(T)and3DVRMEVvaluesweresignificantlygreaterwithincreasingaverage(i.e.(Tt3DVR)/2))MEVperlinearregression(p<0.0001).SignificancewasdemonstratedbetweenfourthandfirstaverageMEVquartiles(p?0.0024),fourthandsecondquartiles(p?0.0024),thirdandfirstquartiles(p?0.0048),andthirdandsecondquartiles(p?0.048).AbsoluteMEVdifferencewasnotsignificantlydifferentacrossvaryingstatesofmiddleeardisease(p?0.44).Conclusion:Statisticallyandclinicallysignificantdisagreementwasdemonstratedbetweentympanometricand3DVRMEVvalues.StudiesthatvaryinMEVestimationtechniquesmaybeexpectedtodemonstratesignificantlydifferentresults.ThesepreliminaryresultssuggestthatcliniciansshouldendeavortoseekfurtherconfirmationwheninterpretinghightympanometricMEVvalues.

简介：Athree-dimensionalcrustaldensitymodelbeneathNorthChinaisdeterminedusingP-wavetraveltimesandgravitydatumbysequentialinversionmethodinthispaper.Toimprovetheuniquenessofthesolution,weusedalinearrelationshipbetweenvelocityanddensitytoachievemutualconversionsandconstraintsbetweenvelocitydifferenceanddensitydifference.Algebraicreconstructiontechnique(ART)wasusedindensityinversion,whichhighlyimprovedthecalculationspeedcomparingwithcommonleastsquaresmethod.TheinversionresultsindicatethatthecrustaldensitybeneathNorthChinaisextremelyinhomogeneouswithitsdistributioncoherentwithregionaltectonics.ThelowercrustofTaihangmountaintectoniczoneshowsanobviouslowdensitycharacteristic.Weproposedthatitmaybeanindicatorofupwellingofmantlematerialsorpartialmeltingoflowermostcrust.

简介：Basedonthetensoranalysisofwater-sedimenttwo-phaseflow,thebasicmodelequationsforclearwaterflowandsediment-ladenflowarededucedinthegeneralcurvecoordinatesfornaturalwatervariable-densityturbulentflow.Fur-thermore,correspondingboundaryconditionsarealsopresentedinconnectionwiththecompositionandmovementofnon-uniformbedmaterial.Thetheoreticalresultsareappliedtothecalculationofthefloatopencaissonintheconstructionperiodandgoodresultsareobtained.

简介：与浸透的土壤存款的由一条半球的冲积山谷的三维的散布和飞机P波浪的衍射的一个分析解决方案被采用Fourier-Bessel系列扩大技术开发。不同于以前的研究，浸透的土壤存款与单相的有弹性的理论在被模仿，在这篇论文，他们为浸透的多孔的媒介，和一半与Biot的动态理论被模仿空间作为asingle阶段被假定橡皮媒介。更少的频率，发生角度ofP波浪和土壤的孔在半球的冲积山谷的表面排水量放大上扔的尺寸的效果被调查。数字结果证明一条浸透的半球的冲积山谷的存在在表面排水量放大上有许多影响。当与发生ofP波浪评估一条半球的冲积山谷的排水量回答时，与Biot的动态理论模仿土壤存款是更合理的。

简介：Anewthree-dimensionaldynamicsandelectrificationcoupledmodelhasbeendevelopedforinvestigatingthecharacteristicsofmicrophysics,dynamicsandelectrificationinsidethunderstorms.Thismodelisbasicallymodifiedfromathree-dimensional,time-dependent,anddual-parametercloudmodeloriginallyestablishedinIAP(InstituteofAtmosphericPhysics)andatwo-dimensionalaxisymmetricclouddynamicsandelectrificationcoupledmodel.Primarymodificationstothemodelincludenotonlythecouplingofelectrificationwithdynamicalandmicrophysicalprocesses,butalsothelightningdischargeprocessandscreeninglayereffectatthecloudtopaswell.Apartfromincludingafulltreatmentofsmallionswithattachmenttosixclassesofhydrometeors,theinductiveandnon-inductivechargingmechanismsaremorespecificallyconsidered.AcasesimulationofJuly19.1981CCOPEisperformedaimingtovalidatethepotentialcapabilityofthemodel.Comparisonbetweenmodelresultsandobservationsrevealsthatthemodelhasthecapacitytoreproducemanyoftheobservedcharacteristicsofthunderstormsindynamical,microphysical,andelectricalaspects.

简介：Inthispaper,ageneralizedLaguerre-sphericalharmonicspectralmethodisproposedfortheCauchyproblemofthree-dimensionalnonlinearKlein-Gordonequation.Thegoalistomakethenumericalsolutionstopreservethesameconservationasthatfortheexactsolution.Thestabilityandconvergenceoftheproposedschemeareproved.Numericalresultsdemonstratetheefficiencyofthisapproach.WealsoestablishsomebasicresultsonthegeneralizedLaguerre-sphericalharmonicorthogonalapproximation,whichplayanimportantroleinspectralmethodsforvariousproblemsdefinedonthewholespaceandunboundeddomainswithsphericalgeometry.

简介：Diastemaoftenoccuredinmaxillarycompletedentureresinbaseintheclinic,although"Lucitone199"hadbeenusedwithmoretensilestrength.Mechanicalex-perimentshaveprovedthehightransversetensilestress(σ_x~+)concentratinginanteri-orteethregionandtheirpalatalsurfaceofmaxillarycompletedentureresinbasewhileitwasexposedtoverticalloadingincenterocclusion.Settingstrengtheningnetinresinbasehasachievedbetterresults.Forevaluatingpurpose,twentykinds

简介：在laminar的非线性的传送对流的效果三维的Oldroyd-B液体流动被探讨。热转移现象被考虑非线性的热放射和热产生/吸收探索。边界层假设被考虑管理流动分析的数学模型。一些合适的类似变量被介绍把部分微分方程转变成平常的微分系统。有射击方法的Runge-Kutta-Fehlberg第四顺序、第五顺序的技术被用来获得无尺寸的速度和温度的答案。液体速度和温度上的各种各样的物理参数的效果被阴谋并且检验。比较与准确并且homotopy不安答案被做为粘滞液体大小写，和一根优秀火柴被注意。墙的数字价值砍在墙的压力和热转移率被公布并且调查。在德卜拉数字的价值的改进在液体速度上显示出反向的行为。当非线性的传送对流参数增加时，结果证明温度和热边界层被减少。Nusselt数字的价值比处于线性放射状况的那些处于非线性的放射状况是更高的。

简介：Areaswithhighfrequencyactivitywithintheatriumarethoughttobe'drivers'oftherhythminpatientswithatrialfibrillation(AF)andablationoftheseareasseemstobeaneffectivetherapyine-liminatingDFgradientandrestoringsinusrhythm.ClinicalgroupshaveappliedthetraditionalFFT-basedapproachtogeneratethethree-dimensionaldominantfrequency(3DDF)mapsduringelectro-physiology(EP)proceduresbutliteratureisrestrictedonusingalternativespectralestimationtech-niquesthatcanhaveabetterfrequencyresolutionthatFFT-basedspectralestimation.

简介：双交换边界元素方法(DRBEM)被使用与三维的潜在的流动预言管和silencers的声学的特征，并且基本原则和建议方法的数字过程是到常规边界元素方法(CBEM)的introduced.Compared，DRBEM在声学的管理方程考虑流动马赫数字的第二个顺序术语，它对有更高的马赫数字的状况合适亚声的flow.The四杆的parame

简介：3-DevolutionofKarmanvortexfilamentsandvortexfilamentsinbraidregionsintheturbulentwakeofa2-Dcirculaxcylinderisinvestigatednumeri-callybasedoninviscidvortexdynamicsbyanalyzingtheresponseoftheinitially2-Dspanwisevortexfilamentstoperiodicspanwisedisturbanceofvaryingmagnitude,wavelengthandinitialphaseangles.Ourresultsrevealakindof3-Dvortexsysteminthewakewhichconsistsoflargescalehorseshoe-shapedvorticesandsmallscaleλ-shapedvortexfilamentsaswellasvortexloops.Themechanismandthedynamicprocessaboutthegenerationofstreamwisevorticalstructureandthe3-Dcoherentstructurearereported.

简介：Afree-standingpaper-likethree-dimensionalgrapheneframework(3DGF)withorientatedlaminarstructureandinterconnectedmacropores,wasobtainedbythehardtemplate-directedorderedassembly.Asthesacrificialtemplates,polystyrene(PS)latexsphereswereassembledwithgrapheneoxide(GO)tobuildupasandwichtypecompositefilm,followedbyheatremovalofwhichwithasimultaneousreductionofGO.The3DGFexhibitedhighspecificsurfaceareaof402.5m2/g,controllableporesandmechanicalflexibility,whichwasemployedasthebinder-freesupercapacitorelectrodeandshowshighspecificgravimetriccapacitanceof95F/gat0.5A/g,withenhancedratecapabilityin3electrodeKOHsystem.

简介：我们把周围的噪音断层摄影术用于在从76个车站的地区性的网络的2008年1月1日和2008年12月31日之间的地震数据由中国地震管理部署了的连续三部件的宽带。周围的噪音跨关联被执行生产每车站对的草地功能。在从6～50s的时期以内，瑞利和爱波浪分散曲线用多重过滤器分析方法被测量。然后三维(3-D)从表面的S波浪速度结构击倒到70km从瑞利和爱波浪分散结果被转换。获得的S波浪速度地图在学习区域与不同地质、构造的特征显示出强壮的侧面的变化和相互关联很好。四川盆由于厚沉积存款，但是高在浅深度显示低速度在中间降低外壳中的速度；东方西藏的高原清楚地在它与外壳的流动模型建议解释机制一致的mid-to-lower外壳中与一个低速度的地区被展示高举并且为西藏的高原的变丑的模式。同时，我们的结果也展出外壳的厚度从东方西藏的高原减少了到四川盆。

简介：AbstractBackground:Three-dimensional (3D) fusion imaging has been proved to be a promising neurosurgical tool for presurgical evaluation of tumor removal. We aim to develop a scoring system based on this new tool to predict the resection grade of medial sphenoid wing meningiomas (mSWM) intuitively.Methods:We included 46 patients treated for mSWM from 2014 to 2019 to evaluate their tumors' location, volume, cavernous sinus involvement, vascular encasement, and bone invasion by 3D multimodality fusion imaging. A scoring system based on the significant parameters detected by statistical analysis was created and evaluated.Results:The tumor volumes ranged from 0.8 cm3 to 171.9 cm3. A total of 39 (84.8%) patients had arterial involvement. Cavernous sinus (CS) involvement was observed in 23 patients (50.0%) and bone invasion was noted in 10 patients (21.7%). Simpson I resection was achieved in 10 patients (21.7%) and Simpson II resection was achieved in 17 patients (37.0%). Fifteen patients (32.6%) underwent Simpson III resection and 4 patients (8.7%) underwent Simpson IV resections. A scoring system was created. The score ranged from 1 to 10 and the mean score of our patients was 5.3 ± 2.8. Strong positive monotonic correlation existed between the score and resection grade (Rs = 0.772, P < 0.001). The scoring system had good predictive capacity with an accuracy of 69.60%.Conclusions:We described a scoring system that enabled neurosurgeons to predict extent of resection and outcomes for mSWM preoperatively with 3D multimodality fusion imaging.Trial registration:Retrospectively registered

简介：ＡＳＥＰＡＲＡＴＥＤ－ＬＡＹＥＲＦＩＮＩＴＥＡＮＡＬＹＴＩＣＭＥＴＨＯＤＦＯＲＮＵＭＥＲＩＣＡＬＳＩＭＵＬＡＴＩＯＮＯＦＡＴＨＲＥＥ－ＤＩＭＥＮＳＩＯＮＡＬＶＩＳＣＯＵＳＦＬＯＷＦＩＥＬＤＡＲＯＵＮＤＡＳＨＩＰＳＴＥＲＮＬｉＴｉｎｇ－ｑｉｕ；Ｍｉａｏ...

简介：Duetotheintricatestructureofporousmedia,themacroscopicpetrophysicaltransportpropertiessuchasthepermeabilityandthesaturationusedforthereservoirpredictionalsoshowaverycomplexnatureandaredifficulttoobtain.Thus,abetterunderstandingoftheinfluenceoftherockstructureonthepetrophysicaltransportpropertiesisimportant.Inthispaper,wepresentauniversalfinitevolumeelementmodelingapproachtoreconstructthethreedimensionalporemodelsfromthemicro-CTimagesbasedonthecommercialsoftwareMimicsandICEM,priortotheporenetworkmodelbasedonsomebasicassumptions.Moreover,tetrafinitevolumeelementsarepileduptorealizethegeometryreconstructionandthemeshingprocess.Comparedwiththeformermethods,thisprocessavoidsthetremendouslylargestoragerequirementforthereconstructedporousgeometryandthefailuresofmeshingthesecomplexpolygongeometries,andatthesametimeimprovesthepredictionsofpetrophysicaltransportbehaviors.ThemodelistestedontwoBereasandstones,foursandstonesamples,twocarbonatesamples,andoneSyntheticSilica.Single-andtwophaseflowsimulationsareconductedbasedontheNavier-StokesequationsintheFluentsoftware.Goodagreementsareobtainedonboththenetworkstructuresandpredictedsingle-andtwo-phasetransportpropertiesagainstbenchmarkexperimentaldata.

简介：设计象建筑学，孔，机械性质和表面性质那样的脚手架的骨头织物的性质在细胞的反应上有重要效果并且在骨头新生起一个重要作用。在这研究，threedimensionalnanocomposite脚手架由钙磷酸盐(帽子)组成nanoparticles并且poly(hydroxybutyrate-co-hydroxyvalerate)(PHBV)共聚物与控制了外部、内部的体系结构成功地经由选择激光sintering(SLS)被生产，万用的快速的原型技术之一。Ca-P/PHBVnanocomposite脚手架有一个孔(对类脂化合物peroxidation的61.75ct。他们的IC50价值是196和273牯敭吗？

简介：Inthepastfewyears,three-dimensional(3-D)seismogramhasbecomeanessentialtoolfortheinterpretationofsubsurfacestratigraphyanddepositionalsystems.Seismicstratigraphyinconjunctionwithseismicgeomorphologyhaselevatedthedegreetowhichseismicdatacanfacilitategeologicalinterpretation,especiallyinadeepwaterenvironment.Technologiessuchastimeslicingandintervalattributeanalysiscanenhancegeomorphologicalinterpretations,and,whenintegratedwithstratigraphicanalyses,canyieldinsightsregardingdistributionofsealandreservoirfacies.Multipleattributescorenderingcanfurtherbringoutfeaturesofgeologicalinterestthatothertechnologiesmayoverlook.Thismethodinvolvescorenderspectraldecompositioncomponents(SDC)withsemblanceattributestodescribethedistributionofdeepwaterchannelelementsandtheboundariesofdeepwatersinuouschannel.Applyingthistechnologytofourelementsisobserved:(1)point-bars,(2)migrationofchannelmeanderloops,(3)channelerosion/cut,and(4)avulsion.Theplanviewexpressionofthedeepwaterchannelrangesfromlowsinuositytohighsinuosity.Furthermore,thistechnologyhasenabledinterpreterstovisualizedetailsofcomplexdepositionalelementsandcanbeusedtopredictnet-to-grossratioinchannelsystems,whichcanbeincorporatedintoboreholeplanningforexplorationaswellasdevelopmentneedstoimproveriskmanagementsignificantly.Thetechnologyisappliedtothestudyareainanefforttoillustratethevarietyofinterpretationtechnologiesavailabletothegeoscientist.

简介：Amethodtothree-dimensionalpositionmovingparticleswithonelensandtwocamerasisproposed.Twoparticleimageswithdifferentdegreesofdefocusingareadoptedtosolvetheambiguousproblemofparticlepositions.Asingle-lensdual-camerasystemisdevelopedtosimultaneouslycapturethesetwoimagesforthemovingparticles.Themeasurementprinciplesandtheoreticalanalysisareintroducedfirst,andthensimulatedinvestigationsandexperimentalresearcharediscussed.Themeasurementerrorsinthesimulationsandexperimentsarelessthan1%and4%,respectively,in20timesthedepthoffieldofthesystem,whichvalidatesthefeasibilityofthismethod.

简介：ThisArticlepresentsathreedimensionalnumericalmodelinvestigatingthermalperformanceandhydrodynamicsfeaturesoftheconfinedslotjetimpingementusingslurryofNanoEncapsulatedPhaseChangeMaterial(NEPCM)asacoolant.Theslurryiscomposedofwaterasabasefluidandn-octadecaneNEPCMparticleswithmeandiameterof100nmsuspendedinit.AsinglephasefluidapproachisemployedtomodeltheNEPCMslurry.ThethermophysicalpropertiesoftheNEPCMslurryarecomputedusingmodernapproachesbeingproposedrecentlyandgoverningequationsaresolvedwithacommercialFiniteVolumebasedcode.TheeffectsofjetReynoldsnumbervaryingfrom100to600andparticlevolumefractionrangingfrom0%to28%areconsidered.ThecomputedresultsarevalidatedbycomparingNusseltnumbervaluesatstagnationpointwiththepreviouslypublishedresultswithwaterasworkingfluid.ItwasfoundthataddingNEPCMtothebasefluidresultswithconsiderableamountofheattransferenhancement.ThehighestvaluesofheattransfercoefficientsareobservedatH/W=4andC_m=0.28.However,duetothehigherviscosityofslurrycomparedwiththebasefluid,theslurrycanproducedrasticincreaseinpressuredropofthesystemthatincreaseswithNEPCMparticleloadingandjetReynoldsnumber.