简介:MacroscopicSiO_2sphereswithahomogeneousaminedistributionweresynthesizedbyaone-stepemulsionbasedsynthesisapproachinaflowcolumnreactor.TheCO_2adsorptioncapacityofthenanostructuredamine-functionalizedsilicasphereswasstudiedinabsenceandpresenceofH_2O.Thestructuralpropertieswereadjustedbyvaryingsolventsandsurfactantsduringthesynthesisand,atconstantamineloadings,werefoundtobethemainfactorforinfluencingtheCO_2sorptioncapacities.Underwater-freeconditionsCO_2isboundtotheaminogroupsviatheformationofcarbamates,whichrequiretwoneighboringaminogroupstoadsorboneCO_2molecule.Atconstantamineconcentrationssorbentswithlowersurfaceareaallowtoestablishahigheraminedensityonthesurface,whichenhancestheCO_2uptakecapacitiesunderdryconditions.InpresenceofH_2OtheCO_2adsorptionchangesto1:1stoichiometryduetostabilizationofcarbamatesbyprotonationofH_2Oandformationoffurtherspeciessuchasbicarbonates,whichshouldinprincipledoubletheadsorptioncapacities.LowconcentrationsofphysisorbedH2O(0.3mmol/g)didnotimpairtheadsorptioncapacityoftheadsorbentsforCO_2,whileathigherwateruptakes(0.6and1.1mmol/g)theCO_2uptakeisreduced,whichcouldbeattributedtocapillarycondensationofH_2Oorformationofbulkyreactionproductsblockinginnerporesandaccesstoactivesites.
简介:Thefissionchamberswhicharegascounterswithfissilematerialinsidechamber,provideessentialinformationforplasmaopcharacteristics.Inconjunctionwiththeneutronfluxmonitorsystemtheseprovidetime-resolvedmeasurementsoftheglobalneutronsourcestrengthandfusionpowerfromthermalnuclearfusionreactorasITERforallplasmaconditionsforwhichneutronsareproduced.
简介:Considerasystemcontainingatypeofndevices.Eachdeviceconsistsofmparts.Givenmnpartsforndeviceswithdifferentworkingprobabilities,howdowegroupthemintondevicessuchthatthesystemismostreliable.Amonotonicgroupingmeansthatthebestpartsareputtogether,thenthebestremainingpartsareputtogether,etc..Asufficientandnecessaryconditionforsuchgroupingbeingoptimalwillbegiveninthispaper.Asanapplication,weshowthatthemonotonicgroupingisoptimalforthetwo-stagek-out-of-nsystem.Whenm=2,wealsostudythegroupingthatthebestpairstotheworst,thesecondbestpairstothesecondworst,etc.,associatedwitharedundantdeviceproblem.
简介:我们学习一个汇编器生产一个最后的产品满足价格的一个集会系统敏感;不明确的要求。最后的产品需要的一个单位从n输入各从一个不同供应商提供的互补部件。从供应商的汇编器订单;他们的关系被价格唯一的合同管理。汇编器练习二个其他的定价计划:她处于所有市场状况由修理零卖价格的一个固定定价计划,;她在观察实际需求以后由调整零卖价格的一个应答的定价计划弯。我们发现当汇编器练习二个定价计划时,供应商收取一样的批发价格,隧道利润根据一样的比例在公司之中被分配,;在在集中的决定makings下面的关于那些的分散的决定makings下面的系统的相对表演是一样。而且,应答的定价改进汇编器的绝对表演,;获得忽略到供应商以更高的利润;到顾客以提高的产品可获得性;降低的市场价格。
简介:TheeditorsofthisvolumeassembledaremarkablegroupofcontributorstodiscussboththegeologyofEastGondwanaandalsomanyrelatedissues.The19papersinthisbookprovideawealthofinformationonEastGondwana,theassemblyofGondwanaasasupercontinent,theconfigurationofRodinia,andgeneralproblemsoftheoriginofcontinentalcrustandmovementofcontinentalplates.Theyalsoillustratesomeofthecontroversies,withmostpapershavingatleastsomepointsofdifferenceinbothfactandinterpretationfromotheroaoersinthebook.
简介:Opticalburstswitching(OBS)isapromisingopticalswitchingtechnology.Theburstassemblyalgorithmcontrolsburstassembly,whichsignificantlyimpactsperformanceofOBSnetwork.Thispaperprovidesanewassemblyalgorithm,unitedassemblyalgorithm,whichhasmorepracticabilitythanconventionalalgorithms.Inaddition,somefactorsimpactingselectionsofparametersofthisalgorithmarediscussedandtheperformanceofthisalgorithmisstudiedbycomputersimulation.
简介:AUTOMATICPLANNINGOFASSEMBLINGORDERFROMASSEMBLYDRAWINGLiShinanJingHaidongAbstractItisimportanttoplantheasemblingorderautomatic...
简介:Thedistributioneffectofelectricfieldonthealignmentandattachmentofcarbonnanotubes(CNTs)wereinvestigated.Theexperimentalresultswerecomparedwiththesimulationresultsaccordingtothreedifferentshapedelectrodes.Inprevioussimulation,theroundshapedelectrodeswereexpectedtobemoreeffectiveforaligningandattachingasingleCNTbetweentwoelectrodesthanconicalorrectangularshapedelectrodes.Toverifythesimulationresults,threedifferentshapedelectrodeswereintroducedandasinglemulti-walledcarbonnanotube(MWNT)wasattached.TheoptimalconditionsforaligningandattachingMWNTssuchasthefrequency,appliedvoltageandconcentrationofMWNTssolutionwereinvestigated.Throughrepeatedexperiments,frequencyof100kHz-10MHz,appliedvoltageof0.3-1.3Vrms/μm,concentrationof5μg/mLinMWNTssolutionwereobtainedasapossibleconditionrangetoattachMWNTs.Undertheseconditions,theyieldofMWNTsattachmentbetweentwoelectrodeswasupto70%.Inprevioussimulation,furthermore,itwasverifiedthatthesizeofthestableorquasi-stableregionmadeCNTsalignedandattachedondifferentshapedelectrodesfromthecomparisonoftheexperimentalandsimulationresults.MostsingleMWNTattachmentwasaccomplishedontheroundshapedelectrodes.
简介:Thedesignsofinertialconfinementfusion(ICF)targets,whichfieldonShenGuangIII,arebecomingmorecomplexandmorestringentintermsofassemblyprecision.Akeyspecificationofthesetargetsisthespatialanglealignmentaccuracy.Tomeettheseneeds,wepresentanewspatialangleassemblymethod,usingtargetpart's3Dmodel-baseddualorthogonalcameravision,whichisbettersuitedfortheflexibleautomationoftargetassemblyprocesses.Thetwo-handsstructuremicromanipulatesystemanddualorthogonalstructurevisualfeedbacksystemwereinvestigatedbyconsideringthekinematics,spatialanglemeasuring,andmotioncontrolinanintegratedway.Inthispaper,wediscussthemeasurementaccuracyofspatialangleassemblymethod,whichcomparedthereal-timeimageacquisitionwiththeredrawing2Dprojection.Theresultshowsthattheassemblymethodproposedisveryeffectiveandmeetstherequirementsofangleassemblyaccuracy,whichislessthan1°.Also,thisworkisexpectedtocontributegreatlytotheadvancementofothertargetmicroassemblyequipments.
简介:VirtualassemblyisaVirtualReality(VR)basedengineeringapplicationwhichallowsengineerstoevaluate,analyze,andplantheassemblyofmechanicalsystems,Tomodelthevirtualassemblyprocess,newmethodologymustbeapplied.Basedontheideathatthevirtualassemblysystemisaneventdrivensystem,theinteractivebehaviorandinformationmodelisproposedtodescribethedynamicprocessofvirtualassembly.Definitionoftheobjectorientedmodelofvirtualassemblyisputforward.
简介:Thedistributionofelectricfieldforthealignmentandattachmentofcarbonnanotubes(CNTs)wassimulated.Tobeattachedatthedesiredplace,thealignedandattractedCNTsshouldbestayedinthedesiredareacalledthestableregionorthequasi-stableregionforaninstantwherethechangeofelectricfieldisminimized.Sincetheconicalelectrodehastheverynarrowsizedquasi-stableregion,fewCNTscanbeattached.Therectangularelectrodeshaveawidestableregion,solotsofCNTscanbeattached.Theresultsindicatethattheroundelectrodewhichhasapropersizedquasi-stableregionismoreeffectiveforaligningandattachingasingleCNTthantheconicalorrectangularshapedelectrodes.
简介:THE47THANNUALASSEMBLYTHEINTERNATIONALINSTITUTEOFWELDINGLinShangyang,Chairman(TheChineseOrganizingCommittee)GuanQiao,President...
简介:Tofulfiltheneedofdevelopmentofoffshoreoilfloatingproductionsystem,theperformanceofturretassemblyinaninboardturretmooringsystemhasbeeninvestigatedinthepaper.Bymeansofsystematicevaluation,theoptimalstructureoftheturretforsingle-pointmooringsystemshasbeendetermined.Throughmodeltestsofaturretmooringsystem,severalgroupsofdatasuchasforces,momentsanddisplacementsunderdifferentenvironmentalconditionshavebeenobtained.Stressesandstrainsoftheturretstructurehavebeencalculatedbymeansofthefiniteelementmethodcorrespondingtothesituationinthemodelexperiment.Thestudyshowsthattheselectedturretstructureandthedesignedturretassemblyaretechnicallyfeasible.
简介:Anewmacrocycliccompoundhasbeensynthesizedbycondensationofpyridine-1-oxide-2,6-dialdehydewithdiethylenetria-mine.Theself-assemlybehaviourswerestudiedbyX-raydiffraction.Theresultsshowthattheself-assemblywerecontrolledbyintermolecularhydrogenbondsandπ-πstackingeffects.
简介:Thispaperdiscussesintegratedproductandproductiondatamanagementforassembly-to-orderproduction,whichischaracterizedbyalargenumberofproductandprocessvarieties.Adatastructure,calledBill-of-Materials-and-Assemblies(BOMA),isproposedforthepurposeofunifyingBOMandassemblyroutingdatainordertoaccommodateawiderangeofproductvariabilityandproductionvariations.AgenericBOMAconceptisputforwardtodealwithvarietyeffectively.AprototypesystemoftheproposedgenericBOMAisimplementedusingobject-orientedmodeling.
简介:MultilayerthinfilmsofalternatelyadsorbedlayersofpolyelectrolytesPDDAandPS-119wereformedonbothplanarsilicasubstratesandopticalfibersthroughtheionicself-assemblytechnique.IntrinsicFabry-Perotcavitieswerefabricatedbystepwiseassemblingthepolyelectrolytesontotheendsofopticalfibersforthepurposesoffiberopticaldeviceandsensordevelopment.Ionicallyassembledpolyelectrolytemultilayerthinfilms,inwhichtherearehydrophilicsidegroupswithstrongaffinitytowardswatermolecules,areacategoryofhumidity-sensitivefunctionalmaterials.ThepolyelectrolytemultilayerthinfilmFabry-Perotcavity-typefiberopticalhumiditysensorcanworkoverawiderangefromabout0%RHtoabout100%RHwitharesponsetimelessthan1s.