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35 个结果
  • 简介:Inthispaper,wepresentanovelapproachtosynthesizingfrontalandsemi-frontalcartoon-likefacialcaricaturesfromanimage.Thecaricatureisgeneratedbywarpingtheinputfacefromtheoriginalfeaturepointstothecorrespondingexaggeratedfeaturepoints.A3Dmeanfacemodelisincorporatedtofacilitatefacetocaricaturesbyinferringthedepthof3Dfeaturepointsandthespatialtransformation.Thenthe3Dfaceisdeformedbyusingnon-negativematrixfactorizationandprojectedbacktoimageplaneforfuturewarping.Toefficientlysolvethenonlinearspatialtransformation,weproposeanovelinitializationschemetosetupLevenberg-Marquardtoptimization.Accordingtothespatialtransformation,exaggerationisappliedtothemostsalientfeaturesbyexaggeratingtheirnormalizeddifferencefromthemean.Non-photorealisticrendering(NPR)basedstylizationcompletesthecartooncaricature.Experimentsdemonstratethatourmethodoutperformsexistingmethodsintermsofviewanglesandaestheticvisualquality.

  • 标签: 非负矩阵分解 人脸模型 漫画 半合成 Marquardt 额叶
  • 简介:肖庆农,伍荣生AStudyonFrontalMotionoverOrography¥XiaoQingnonsandWuRongsheng(DepartmentofAtmosphericSciences,NanjingUniversity,Naming...

  • 标签: FRONTS OROGRAPHY FRONTAL MOTION and STRUCTURE
  • 简介:TheBrazilianshieldwasassembledfromafewArcheanandPaleoproterozoiccratonicnucleisurroundedbyPan-African-BrasilianomobilebeltsofNeoproterozoicage.Whilesomeofthesemobilebeltsdisplayatypicalfrontalcollisiontectonicstyle,othersaredominatedbytranscurrentregimes,clearlyindicatingobliquecollisionalsystems.Thispaperisanattempttodeterminethemeanorientationoftheprincipalhorizontalcompressivestressesforeachmobilebelt,consideringeitherthefrontalorobliqueconvergencecharacter.FromthesegeneralobservationsaschemewithWNW-ESEtoNWSEtrendsofthemaincompressivestressisproposed.Wesuggestthatthistrendrepresentsthemeandisplacementvectors,accordingtoacoherentkinematicpicturefortheamalgamationoftheWestGondwanaduringthefinalstagesofconvergenceoftheBrasilianobelts,whereWNW-ESEtoNW-SEarethemaindirectionsoffinalclosure.

  • 标签: 巴西大陆地盾 倾斜构造 太古代 克拉通板块 原生代
  • 简介:Pilotspatialdisorientationisaleadingfactorcontributingtomanyfatalflyingaccidents.Spatialorientationistheproductofintegrativeinputsfromtheproprioceptive,vestibular,andvisualsystems.Vestibularneuritis(VN)canleadtosuddenpilotincapacitationinflight.VNiscommonlydiagnosedbydemonstrationofunilateralvestibularfailure,asunilaterallossofcaloricresponse.Asthistestreflectsthefunctionofthesuperiorpartofthevestibularnerveonly,casesofpureinferiornerveneuritiswillbelost.ThispaperdescribesafighterpilotwithsymptomssuggestiveofVNbutwithnormalcalorictestresults.Furthertestshowedunilaterallossofvestibularevokedmyogenicpotential.Webelievethatthepilotsufferedfrompureinferiornervevestibularneuritis.VEMPplaysamajorroleinthediagnosisofinferiornervevestibularneuritisinpilots.Aeromedicalconcernsarealsodiscussed.

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  • 简介:Growingevidencehasbeenfoundtosuggestthatearlydevelopmentofthecentralauditorysystemisdependentonacousticstimuli.Peripheraldamagecausedbynoiseexposureandototoxicdrugscaninducefunctionalandanatomicalchangesalongtheauditorypathways.Theinferiorcolliculus(IC)isauniquestructureintheauditorysystemlocatedbetweentheprimaryauditorynucleiofthebrainstemandthethala-mus.DamagetotheICinhibitorycircuitrymayaffectcentralauditoryprocessingandsoundperception.Here,wereviewsomeofthestrikingelectrophysiologicalchangesintheICthatoccurafternoiseexposureandototoxicdrugtreatment.AcommonoccurrencethatemergesintheICafterperipheraldamageishyper-excitabilityofsound-evokedresponse.ThehyperexcitabilityoftheICislikelyrelatedwithreducedinhibi-toryresponsethatrequiresnormalperipheralinputs.Earlyagehearinglosscanresultinalonglastingin-creasedsusceptibilitytoaudiogenicseizurewhichisrelatedtohyperactivityintheICevokedbyloudsounds.OurstudiessuggestthathearinglosscancauseincreasedICneuronresponsivenesswhichmayberelatedtotinnitus,hyperacusis,andaudiogenicseizure.

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  • 简介:AbstractBackground:Renal cell carcinoma (RCC) has the propensity to lead to venous tumor thrombus (VTT). Nephrectomy with tumor thrombectomy is an effective treatment option but is a technically challenging surgical procedure that is accompanied by a high rate of complications. The aims of this study were to investigate pre-operative imaging parameters for the assessment of inferior vena cava (IVC) wall invasion due to a tumor thrombus in patients with RCC and to identify predictors from the intra-operative findings.Methods:Clinical and imaging data were collected from 110 patients who underwent nephrectomy with IVC tumor thrombectomy (levels I-IV) for RCC and IVC tumor thrombus at the Peking University Third Hospital between May 2015 and March 2018. Univariable and multivariable logistic regression and receiver operating characteristic curves were used to assess the correlations between pre-operative imaging features and intra-operative macroscopic invasions of the IVC wall by tumor thrombus.Results:Among the 110 patients, 41 underwent partial or segmental resection of IVC. There were univariate associations of pre-operative imaging parameters that could be used to predict the need for IVC resection, including those of the Mayo classification, maximum anterior-posterior (AP) diameter of the renal vein at the renal vein ostium (RVo), maximum AP diameter of the VTT at the RVo and IVC occlusion. For the multivariable analysis, the AP diameter of the VTT at the RVo and IVC occlusion were associated with a significantly increased risk of invasion of the IVC wall by tumor thrombus. The optimum imaging thresholds included an AP diameter of the VTT at the RVo larger than 17.0 mm and the presence of IVC occlusion, with which we predicted invasions of the IVC wall requiring IVC resection. The probabilities of intra-operative IVC resection for patients without both independent factors, with an AP diameter of the VTT at the RVo larger than 17.0 mm, with IVC occlusion, and with both concurrent factors were 5%, 23%, 56%, and 66%, respectively.Conclusion:An increase in the AP VTT diameter at the RVo and the presence of complete occlusion of the IVC are independent risk factors for a high probability of IVC wall invasion by tumor thrombus.

  • 标签: Renal cell carcinoma Inferior vena cava Thrombus Imaging
  • 简介:Theunifiedtheoreticalmomentexpressionsforelutionchromatographyandfrontalchromatographywhenthesorptionprocessisdescribedbyalinearmodelwerederived.Themomentexpressionsderivedbypreviousauthorscanbeobtainedfromtheseunifiedtheoreticalmomentexpressions.Inthispaper,amathematicalanalysishasbeencarriedoutsoastosetupaunifiedtheoreticalbasisforelutionandfrontalchromatography.

  • 标签: 统一理论矩表达 迎头色谱法 洗脱色谱法
  • 简介:<正>Drivenbytheincreasingsupplyofheavyoilswithdeterioratingquality,ahighnickel-resistantcatalystforcatalyticcrackingofinferiorcrudeoilswasdevelopedbytheResearchInstituteofPetroleumProcessing(RIPP).Catalystperformancewasevaluatedinalaboratoryfixedfluidizedbedreactor.Thetestresultsshowedthatthehighnickelresistancecatalystexhibitedgoodbottomscrackability,goodnickelresistance,andgoodadaptabilitytochangesinoperatingparameters,whichhadnoadverseeffectontheproductdistribution,indicatingtoamostpromisingprospectforapplicationofthiscatalystincatalyticcrackingofinferiorcrudeoil.

  • 标签: CATALYTIC CRACKING CRUDE OIL EQUILIBRIUM CATALYST
  • 简介:客观:为了学习寻找鼻音上的治疗学的效率和effecacy指导oflaser途径,为canalicular撕裂在吻合打破撕碎的眼泪的小管的结束。方法:受不了创伤的劣等的canalicular撕裂的49个病人(49只眼睛)被划分成控制组和指导激光的组。在眼泪的斑点和鼻音之间的距离撕碎的眼泪的小管的破结束是超过6公里。在眼皮损伤的管理的功课期间,病人被canalicular吻合操作在分别地在撕碎的眼泪的小管的结束找打破的鼻音与传统的方法和指导激光的方法对待。1条公里直径的硅酮试管作为stent在眼泪的经过被把管子插进4~6个月。结果:Inthe指导激光的组,在在撕碎的眼泪的小管的破结束找鼻音的吝啬的时间是(5。75±1.49)纪录,操作的吝啬的时间是(49.21±3.37)纪录;两个比控制组的显著地短(P<0.01)。指导thelaser组的痊愈率是96.55%,比控制组,但是没有统计意义(P>0.05)的高。结论:指导激光的方法对比传统的途径,和病人得更少的疼痛在撕碎的眼泪的小管的结束找打破的鼻音并且在canalicular吻合操作损坏快得多、更方便。

  • 标签: 临床应用 激光治疗 吻合术 微管损伤
  • 简介:ObjectiveFortycasesofIAMIwereexaminedwithcoronaryangiographyinordertostudytherelationshipofthevesselswiththeECGofIAMI.MethodsForcoronaryangiographyJudkin’smethodwasused;IAMIwasdiagnosedbythe1979WHO’sstandardofISHDandECGwasseparatelymeasuredbytwodoctors.ResultsMostofIAMIwithpolybranchcoronaryoritscollateraldisease(32.5%and42.5%)andonly10cases(25%)withsinglebranchcoronarydisease,whoseECGswereuntypical.ConclusionIAMIwithsingle-branchcoronarydiseasemightexpressasmildsymptomsandhavenotypicalECGchange.WhiletypicalECGchangeemerges,thecoronaryarteryalwaysshowedpoly-branchdiseaseorcollateralbranchobstructionandthediseasewouldbeadvanced.ItisimportanttopaymoreattentiontothecasesofIAMIwithoutclassicECGchangesoastogivediagnosisandtreatmentthemintime.

  • 标签: Acute INFERIOR MYOCARDIAL INFARCTION RELATED VESSELS
  • 简介:ObjectiveToinvestigatetheeffectsofselectivenitricoxidesynthase(NOS)inhibitorsondentategyrusneurogenesisafterdiffusebraininjury(DBI)intheadultratbrain.MethodsAdultmaleSDratsweresubjectedtodiffusebraininjury(DBI)model.Byusingsystemicbromodeoxyuridine(BrdU)tolabeldividingcells,wecomparedtheproliferationrateof

  • 标签: NOS 齿状脑回 神经形成 弥漫性脑损伤 大鼠
  • 简介:Electroacupuncture(EA)hasbeenclinicallyusedtotreatdepressionandhasresultedinfavorableeffectsinChina.However,resultsfromanimalstudiesandpathologydonotreflecttheinfluenceofelectroacupuncturetreatmentoninvivophysiologicalfunctions.Tothoroughlyanddynamicallyobservepathologicalchangesduringdepression,thepresentstudyestablishedEA+fluoxetineandfluoxetinegroupstoobservedepressioninpatients.1H-magneticresonancespectroscopywasutilizedtodeterminethecorrelationbetweenhippocampalfrontallobemetabolitechangesandmentaldisorderscale.ResultsrevealedsignificantlyincreasedN-acetylaspartate(NAA)/creatine(Cr)inthebilateralhippocampusandrightfrontallobeofdepressionpatientstreatedwithEAcomparedwithfluoxetine.ChangesinNAA/Crinbilateralhippocampusandrightfrontallobeinbothgroups,beforeandaftertreatment,negativelycorrelatedwithseverityandcurativeeffects.Choline/Crchangesinthebilateralfrontallobesofbothgroupsweresignificantbeforeandaftertreatment,butnegativelycorrelatedwithcurativeeffects.Choline/CrchangesinthebilateralhippocampusweresignificantintheEA+fluoxetinegroupbeforeandaftertreatment,butnegativelycorrelatedwithseverityandthecurativeeffectsofdepression.Theseresultsdemonstrateabnormalbiochemicalmetabolisminbilateralfrontallobesandhippocampusofdepressionpatients,andshowthatEAsignificantlyalteredbiochemicalindicesinthefrontallobesandhippocampuscomparedwithfluoxetine.

  • 标签: 电针治疗 抗抑郁药物 额叶 海马 合作 病理变化
  • 简介:Fuelconsumptionhasalwaysbeenamatterofconcernforshipspropulsion.Inthisresearchweaimtodevelopcomputermodelsofseveralcontainershipcargostackingconfigurationsanddiscussanoptimalconfigurationataconstantfrontwindspeed.ThepaperpresentsthesimulationresultsbyusingANSYSCFXfora1:4scalePost-Panamax9000TEUcontainership.Theshipismodelledinacubicdomainthatcontainsunstructuredmeshwithdetails,insuchawaythatcandemonstratetheinfluenceofthecontainerconfigurationonwindforce.Alsothenumericalresultsareverifiedversuswindtunneltestdata.Anoptimalstackconfigurationledtoabout25%reductioninairresistance.Itisproposedthatinordertoreducethewinddragforceandconsequentlyreducethefuelconsumptionandpollutantemissions,emptyspacesbetweenthecargocontainersandunbalancedcargodistributionoverthedeckshouldbeinhibited.Also,itisadvisedtomakethecargodistributiononthemostforwardandaftwarddeckareasmorestreamlined.

  • 标签: containership numerical simulation WIND FORCE CARGO
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  • 简介:AIM:Toinvestigatechangesinfundusexcyclotorsionafterinferiorobliquemyectomyormyotomy.METHODS:Therecordsof21patientsundergoingstrabismussurgerybyasinglesurgeonbetween2009and2012wereexamined.Onlypatientswhohadundergoneaninferiorobliquemyectomyormyotomy,withorwithouthorizontalrectusmusclesurgery,wereevaluated.Digitalfundusphotographswereobtained,andtheangleformedbyahorizontallinepassingthroughtheopticdisccenterandareferencelineconnectingthefoveolaandopticdisccenterwasmeasured.Associatedclinicalfactorsexaminedincludeageatthetimeofsurgery,presenceorabsenceofaheadtilt,degreeofpreoperativeverticaldeviation,torsionalangle,inferiorobliquemuscleoveraction/superiorobliquemuscleunderaction,andsurgerylaterality.Whethertheprocedurewasperformedaloneorincombinationwithahorizontalrectusmusclesurgerywasalsoexamined.RESULTS:Meanpreoperativetorsionalanglewas12.0±6.4°,whichdecreasedto6.9±5.7°aftersurgery(P<0.001,pairedt-test).Torsionalanglealsodecreasedfrom15.1±7.0°to6.2±4.3°inthemyectomygroup(P<0.001,pairedt-test)buttherewerenosignificantchangesinthemyotomygroup(P=0.093,Wilcoxonsignedranktest).Multivariablelinearregressionanalysisshowedthatpreoperativetorsionalangle,degreeofinferiorobliqueoveraction,andageatsurgeryindependentlyandsignificantlyaffectedpostoperativetorsionalangle.CONCLUSION:Meantorsionalangledecreasedafterinferiorobliquemyectomy.Degreeofpreoperativetorsionalangle,inferiorobliqueoveraction,andageatsurgeryinfluencepostoperativetorsionalangle.

  • 标签: OCULOMOTOR muscles STRABISMUS superior OBLIQUE PALSY
  • 简介:一个简单正面的分析方程将决定不同吸附物上的溶质分子的吸附参数被介绍。它给在平均突破时间和feed溶质集中之间的关系,并且由使用它的线性形式,二个重要参数,为吸附物的表面和全部的吸附地点的数字nt上的溶质吸附的热力学的平衡常数KSL在吸附物的表面上散布了,能同时坚定。为RP-C18反向阶段的媒介上的一些芳香的烃的正面的分析,和RP-C18上的一些蛋白质分子反向阶段,WCX-1阳离子交换,恐水病的PEG-400和Che1atingSepharose快流动独立有Zn2+或Cu2+媒介的chelated,独立被执行测试这个方程和他们的吸附参数KSL,nt独立被获得。结果证明所有这些正面的分析数据能被这个正面的分析方程很好描述。为所有这些正面的分析系统,他们的参数nt能近似独立保持不变,他们独立于使用的溶质分子,当他们的参数KSL依赖于两在正面的分析列和溶质包装的媒介时,分子使用了。

  • 标签: 吸附 化学行为 热动力学 蛋白质 天然高分子
  • 简介:Inthisstudy,evolutionofthemesoscaleconvectivesystems(MCSs)withinaMeiyufrontduringaparticularlyheavyrainfalleventon22June1999inEastChinawassimulatedbyusinganonhydrostaticnumericalmodelARPS(AdvancedRegionalPredictionSystem).Investigationswereconductedwithemphasisontheimpactoftheinteractionamongmulti-scaleweathersystems(MWSs)onthedevelopmentofMCSsintheMeiyufrontalenvironment.Forthiscase,thedevelopmentofMCSsexperiencedthreedifferentstages.(1)TheconvectionsassociatedwithMCSswerefirstlytriggeredbytheeastward-movingSouthwestVortex(SWV)fromtheSichuanBasin,accompanyingtheintensificationoftheupper-leveljet(ULJ)andthelow-leveljet(LLJ)thatwereapproachingtheMeiyufront.(2)Next,alow-levelshearline(LSL)formed,whichstrengthenedandorganizedtheMCSsaftertheSWVdecayed.Meanwhile,theULJandLLJenhancedandproducedfavorableconditionsfortheMCSsdevelopment.(3)Finally,astheMCSsgotintensified,amesoscaleconvectivevortex(MCV),amesoscaleLLJandamesoscaleULJwereestablished.Thenacoupled-developmentofMWSswasachievedthroughtheverticalfrontalcirculations,whichfurtherenhancedtheMCVandresultedintheheavyrainfall.ThisisanewphysicalmechanismfortheformationofMeiyuheavyrainfallrelatedtotheSWVduringthewarmseasoninEastChina.Inthethreestagesoftheheavyrainfall,theverticalfrontalcirculationsexhibiteddistinguishedstructuresandplayedadynamicrole,andtheyenhancedtheinteractionamongtheMWSs.AfurtherexaminationontheformationandevolutionoftheMCVshowedthattheMCVwasmainlycausedbythelatentheatreleaseoftheMCSs,andthepositivefeedbackbetweentheMCSsandMCVwasakeycharacteristicofthescaleinteractioninthiscase.

  • 标签: 中尺度对流系统 梅雨暴雨 仿真 事件
  • 简介:Atpresent,theneuropathologicalmechanismsandtheplasticchangesofbraincognitivefunctioninpatentswithfrontlobetumorremainunclear,moststudiesjustfocusedonglobalmeasuresofbrainfunctionalconnectivitywithoutconsideringthetimecorrelationinthedifferentregionsofthebrain.Thisstudyaimstoinvestigatebraincognitivealterationsandfunctionalplasticityinpatientswithfrontlobetumoratresting-statebyconductingfunctionalconnectivitydensity(FCD)mappingandgrangercausalityanalysis(GCA).Firstly,FCDmappingwasusedtoextractabnormalfunctionalconnectivity(FC)ofpatientswithfrontallobetumor,andanalyzedalteredbrainFCinbothshort-andlong-rangeFCD.Then,thevoxel-wiseGCAmethodwasusedtoanalyzethecausalrelationshipbetweenalteredFCregionsandotherregionsinordertodetectthetimecorrelationbetweenregionsofinterest(ROI)andrevealthedirectionofinformationflowbetweenbrainROIs.Itwasfoundthatpatientshadincreasedshort-rangeFCDinmotorandspaceattentionfunctionareas,hadincreasedshort-andlong-rangeFCDsbothinTemporalandInsula,andthecausalcoefficientswerechangedobviouslyinTemporalandFrontal.Theresultsshowthatthereisafunctionalplasticityinspaceattentionfunctionareas.TemporalandInsulaareaffectedbytumorinfrontallobe,andfunctionalreorganizationappearsinsideTemporal.

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  • 简介:FragileXsyndromeisthemostcommonformofinheritedmentalretardationaffectingupto1in4000individuals.ThesyndromeisinducedbyamutationintheFMR1gene,causingadeficiencyinitsgeneby-productFMRP.ImpairmentinthenormalfunctioningofFMRPleadstolearningandmemorydeficitsandheightenedsensitivitytosensorystimuli,includingsound(hyperacusis).ThemolecularbasisoffragileXsyndromeisthoroughlyunderstood;however,theneuralmechanismsunderlyinghyperacusishavenotyetbeendetermined.Astheinferiorcolliculus(IC)istheprincipalmidbrainnucleusoftheauditorypathway,thecurrentstudyaddressesthequestionsunderlyingtheneuralmechanismofhyperacusiswithintheICoffragileXmice.AcuteexperimentswereperformedinwhichelectrophysiologicalrecordingsoftheICinFMR1-KOandWTmiceweremeasured.ResultsshowedthatQ-valuesforWTweresignificantlylargerthanthatofFMR-1KOmice,indicatingthatWTmiceexhibitsharpertuningcurvesthanFMR1-KOmice.WealsofoundtheratioofthemonotonicneuronsintheKOmicewasmuchhigherthantheWTmice.TheseresultssuggestthatlackofFMRPintheauditorysystemaffectsthedevelopmentalmaturationandfunctionofstructureswithintheauditorypathway,andinthiscasespecificallytheIC.ThedysfunctionobservedwithintheauditoryneuralpathwayandinparticulartheICmayberelatedtotheincreasedsusceptibilitytosoundasseeninindividualswithfragileXsyndrome.OurstudymayhelponunderstandingthemechanismsofthefragileXsyndromeandhyperacusis.

  • 标签: 下丘神经元 基因突变 点火性能 脆性X综合征 听觉通路 神经机制