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39 个结果
  • 简介:COMPUTERAIDEDINSPECTIONPLANNINGTangXiaoqingCOMPUTERAIDEDINSPECTIONPLANNING¥TangXiaoqingAbstractComputeraidedinspectionplannin...

  • 标签: INSPECTION measurement COMPUTER aided INSPECTION plannig
  • 简介:Thisarticlesummarizestheachievementsoftheauthors'groupintheareaofbiocatalyst-catalyzedorganicreactionsinrecent10years.AstrainofGeotrichumsp.obtainedbyscreeninuiscapableofstereoselectlvelyreducinganumberofcarbonylcompounds.Inmanycases,thestermghemistryiscomplementarywiththatobtainedbybaker'syeast.Therefore,thismicroorganismprovidesausefulpathwaytothepreparationofalcoholeompoundswithspecificconfigurations.Ontheotherhand,anmmberofplantsoureeshavebeenscreenedforoxynitrilasesandthehydrocyanationreactionsofvariousarylcarboxalde-hydeshavebeeninvestigated.A'micro-aqueousreactionsystem'wasinvented,bywhichaserlesofnovelopticallyactivecyanohydrinswereprepared.Onthishasis,ahighthrough-putcomtimasousreactionsystemhasbeendesigned.Thispaperalsodeseribesexamplesofthesynthesesofbio-activecompoundsbyusingtheoptieallyactivecompoundsobtainedfromtheabovementionedcatalyticreactionsasprecursors.

  • 标签: 不对称合成 生物催化剂 立体选择性还原 氧腈酶 对映选择氢氰化 有机反应
  • 简介:ObjectiveToestablishathree-dimensionalmodelofthetemporalboneusingCTscanimagesforstudyoftemporalbonestructuresandsimulationofmastoidectomyprocedures.MethodsCTscanimagesfrom6individuals(12temporalbones)wereusedtoreconstructtheFallopiancanal,internalauditorycanal,cochlea,semicircularcanals,sigmoidsinus,posteriorfossafloorandjugularbulbonacomputerplatform.Theiranatomicalrelationswithinthetemporalbonewererestoredinthecomputedmodel.Thesamemodelwasusedtosimulatemastoidectomyprocedures.ResultsThereconstructedcomputermodelprovidedaccurateandclearthree-dimensionalimagesoftemporalbonestructures.Simulationofmastoidectomyusingtheseimagesprovidedproceduralexperiencescloselymimickingtherealsurgicalprocedure.ConclusionComputer-aidedthreedimensionalreconstructionoftemporalbonestructuresusingCTscanimagesisausefultoolinsurgicalsimulationandcanaidsurgicalprocedureplanning.

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  • 简介:ManytaskstypicalforHighEnergyPhysicssuchassimulation,eventdisplay,maintenanceofthegeometrydatabaseofanexperiment,requireinputofgeometricaldata.TosimplifytheprocessofpreparationofsuchkindsofdataaninteractivegraphicatoolGBuilderisbeingdevelogped.DefinitionofthegeometrymodelinGBuilderisbasedontheConstructiveSolidGeometryapproachwhereobjectsaredefinedusingbooleanoperationsonbasicshapes.Toprovidsparameterizationofthemodelarithmeticexpressionsmaybeusedinplaceofnumbers,Awidelistofpredefinedmaterialsisalsoavailable.Differentdriversallowtooutputthegeometrymodelinaformsuitableforspecificsimulationofvisualanalysistools.

  • 标签: GBuilder 计算机辅助设计 探测器几何
  • 简介:INTERFERENCECHECKINGINCOMPUTER-AIDEDPLANTDESIGNSYSTEMWangFengZhaoHongNiuJunyuAbstractInthispaper,theinterferencecheckingofthr...

  • 标签: INTERFERENCE CHECKING PLANT design system THREE-DIMENSIONAL
  • 简介:TheambiguityresolutioninthefieldofGPSisinvestigatedindetail.Anewalgorithmtoresolvetheambiguityisproposed.Thealgorithmfirstobtainsthefloatingresolutionoftheambiguityaidedwithtripledifferencemeasurement.Decorrelationofsearchingspaceisdonebyreducingtheambiguitycovariancematrix'sdimensiontoovercomethepossiblesickfactorizationofthematrixbroughtbyZ-transformation.Insimulation,theproposedalgorithmiscomparedwithleast-squaresambiguitydecorrelationadjustment(LAMBDA).TheresultshowsthattheproposedalgorithmisbetterthanLAMBDAbecauseoflesserresolvingtime,whichapproximatelyreduces20%resolvingtime.Thus,theproposedalgorithmadaptstothehighdynamicreal-timeapplications.

  • 标签: GPS 全球定位系统 载波相位测量 模糊度
  • 简介:Thetwo-dimensionalnumericalsimulationofenergytransportforMOSFETsispresented,inwhichtheeffectofgeneration,recombinationandtemperaturegradientofcarriersonthecharacteristicsofdevicesareconsidered.Animprovedmobilitymodelisalsoproposed.ThenumericalresultsofmicronandsubmicronMOSFETsshowthatthepresentmodelfitsexperimentverywell.

  • 标签: MOSFET ENERGY Transport MOBILITY NUMERICAL Simulation
  • 简介:ShoemakingisoneoftheareaswhereCAD/CAMapplicationisrapidlyincreasing.Thispaperintroducesanintegratedcomputeraidedshoemakingsystemincludinghumanfootmeasuring,last(woodenmodel)measuring,lastCAD/CAMandpatternCAD/CAM.Theprojectwassupportedbythe7thnationaleconomical5yearplan.Hightechnologies,suhasdigitalimageprocessing,patternrcognition,advancedgeometricalmodelingandaseriesofsophisticatedequipmentsanddevicesareap-pliedinthisintegratedsystem.Partsofthesystemhavebecomecommercialproducts.

  • 标签: Shoe-Making Digital PHOTOGRAMMETRY CLOSE RANGE Measuring
  • 简介:许多因素(更大的人口,技术上的更多的相关性,在自然系统和equilibria的更引起人的干扰,气候变化,)贡献灾难的看起来成长的数字和严厉。另外的夸张被公共媒介产生。作为后果灾难,预防和灾难管理必须被给增加的注意。灾难管理的最终的目标是影响系统并且这样的跳回影响人口的足够、可接受的幸存。我们在袭击或骚乱的情况中讨论系统行为:从是易碎的(他们的功能的损失由于袭击)到是有弹性的(有能力……在骚乱以后弹起回到动态稳定性),或甚至antifragile(对有能力“学会”以便改善灾难跳回)。跳回2.0识别一个新范例:现代信息和通讯技术(ICT)作为一个系统的创新、改进的跳回的一个基础被采用。ICT在袭击前为足够的准备,为快识别,并且为对灾难的有效、有效反应提供基础。ICT的仅仅协调intra-和分裂期间推广答应足够的成功和罐头把跳回带到当前迄今为止易碎的系统。我们讨论stressors(时间和表演压力,人员上的物理、心理的应力)并且问题由于损坏ICT站台和通讯基础结构。基本消息是电脑辅助的灾难管理对提议有能力反应的新水平:跳回2.0。

  • 标签: 灾难 危险 跳回 人的反应 冒险 威胁
  • 简介:ThispaperpresentsdesigntheoryandmethodoftheintellectualizedCAI.whichincludestheorganizationandexpressionoftheteachingcontentandtheteachingrequirementdeterminationinteachingprocess,anddevelopsahighlyintellectualizedCA1software.LA-CAI,touseforlinerarithmeticteachingprogram.

  • 标签: CAI intellectualization SOFTWARE
  • 简介:InthepaperthebasicelementsofCADsystemsfromsoftwarepointofviewaredis-cussed.ThecreationandnextthemodificationofCADsystemsneedsspecializedsoftwaretools.InthepapertheideacomputerAidedSoftwareEngineering(CASE)forCADsystemsproductionandpracti-calsoftwarerealizationofsuchasoftwaretoolisconsidered.ThemainelementofthistoolisspecialprogramprovidedforconvenientstorageandmodificationofCADsourceprogram.Inthepaperthesimpleexamplesarepresentedanddiscussed.

  • 标签: COMPUTER aided SOFTWARE ENGINEERING CASE SOFTWARE
  • 简介:Thispaperstudiestherelationshipbetweenmobility,navigationandlocalizationinthecontextofwirelesssensornetworkswithmobilebeacons.Itisobservedthatmobilitycanaidinnetworknodelocalizationandthatoncelocalized,thenetworknodescanlocalizeandtrackamobileobjectandguideitsnavigation.Adistributedkernel-basedalgorithmisproposedthatenablesthenodestoestablishconfidentpositionestimatesinthepresenceofranginginaccuracies.Theproposedapproachfeaturesrobustnesswithrespecttorangemeasurementinaccuracies,lowcomplexityanddistributedimplementation,usingonlylocalinformation.Simulationvalidatesourapproachviable.

  • 标签: 无线传输网络 局域化 网络接点 迁移率
  • 简介:Thephasetransformationcharacteristicsofahigh-strengthTRIP-aidedmultiphasecold-rolledsteelduringcontinuousheatingatdifferentcoolingrateswerestudiedbymeansofdilatometry,andthecriticaltemperatureswerealsodetermined.Thesampleswerefullyaustenitizedat1050℃andthencooledatdifferentcoolingratesrangingfrom0.5℃/sto100℃/s.Thecontinuouscoolingtransformation(CCT)curveswereobtainedfortheexperimentalsteel.Theexperimentalresultsshowedthatahighcoolingratedepressedtheformationofferriteandpearliteandpromotedtheformationofbainiteandmartensite,leadingtoahigherhardness.Alargeamountofmartensiteinhigh-strengthTRIP-aidedmultiphasecold-rolledsteelcanbeobtainedatcoolingratesinexcessof50℃/s.Theexperimentalresultsprovideguidelinesforcoolingcontrolandheattreatmentinrealsteelproduction.

  • 标签: 冷却过程 相变特性 多相钢 跳闸 连续冷却转变 TRIP
  • 简介:Thepartiallyfilledpipeflowsencounteredindrainagesystemsbelongtoafamilyofunsteadyflowproblemscapableofnumericalsolutionviathemethodofcharacteristics.Thedefiningequationsintermsofflowdepth,velocityandsurfacewavespeedaredevelopedandnumericallysolvedbycharacteristic-differencemethodwithtime-lineinterpolationscheme.Boundaryconditionsforinflow,outflow,movinghydraulicjumpandjunctionsaredevelopedbothexperimentallyandnumerically.Fullscalemodelexperimentswerecarriedoutanditwasconsequentlyclarifiedthatnumericalmodeliscapableofpredictingflowcharacteristicsinrealisticdrainagenetworks.

  • 标签: drainage system UNSTEADY flow characteristic difference