学科分类
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137 个结果
  • 简介:Aclearlight-yellowsilversolwhichhasthevisiblespectralabsorptionat390nm,whenadsorbedphenylmercaptotetrazole(PMT)ormercaptobenzothiazole(MBT),hasanewabsorptionat510-550nm.ItwasfoundthattheadsorptionofhalideionscompeteswithPMTandMBT.However,halideionshaveacompletelydifferentinfluencefromPMTandMBTonthespectralabsorptionofthesilversol.Thedifferencesmayresultfromthechangeofthepropertiesofthesurfaceofthesilversubcolloidalparticlesandfromthebondformscombiningadsorbateswiththesubstrates.

  • 标签: SILVER adsorbed VISIBLE HALIDE SURFACE AGGLOMERATION
  • 简介:FUNCTIONSOFCELLSSCAFFOLDINTHETISSUEENGINEERINGCell,cellsscaffoldandtheconstructionoftissueandorganarethreemainfactorsfortheTissueEngineering.Amainfunctionofcellsscaffoldintissueengineeringistoprovideanenvironmentforcellspropagation.

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  • 简介:Inthispaper,severalmixtruerulesofsoundvelocityandtheirusefulnessincharacterizingthecomponentsofbiomediumareanalysed.Itispointedoutthatforcharacterizingthecomponentsofbiomedium,therulesarecompatiblewitheachotherundercertainconditions,andtheerrorsbetweeneachruleandrealsoundvelocityarediffferent.Itconcludesthatthereisnogeneralrulesuitableforvariousmediaamongabovementionedrules.

  • 标签: SOUND VELOCITY MIXTURE RULES Biomedium.
  • 简介:Thesynthesisandpropertiesofcarbonxerogelsarebrieflydescribedinthismini-review,emphasizingthemethodsusedfortuningtheirsurfacechemistryandtexturalpropertiesinordertodesignefficientelectrocatalystsforfuelcells.Inparticular,theroleplayedbythesurfacefunctionalgroupsindeterminingtheloading,dispersion,oxidationstateandstabilityofthemetalphasesisaddressed.

  • 标签: 燃料电池 干凝胶 合成 催化剂 表面官能团
  • 简介:AnelectroncyclotronresonanceheatingsystemwillbeconstructedinthenearfutureforECHandECCDinvestigationonHL-2Atokamak.ThenewECRHsystemwillprovideHL-2Awithapowercapabilityof1MWfor1satfrequencyof70GHz.Consequently,itisveryimportanttochooseasuitablegyrotronandsomecomponentsforHL-2AECRHsystem.

  • 标签: 电子回旋加热 电流驱动 核聚变 参数计算 ITER 等离子体
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  • 简介:AMaintenanceAnalysisofModulesandApparatusNormallyUsedinNIMInstrumentService¥MaXiaoli;SuHong;XuHaiyingandLiXiaogangAsanimporta...

  • 标签: SERVICE Modul
  • 简介:Anon-axisholographiczoneplateoranoff-axisholographiczoneplateusedforthesiliconsolarcellwillhaveasolarenergyconversionfactorof2.5.Andthecombinationofthetwoplateswillhaveitsconversionfacftorof5.Especiallyfortheuseofsilverhalidephotographicemulsion,thecostcanbecutdowndramatically.

  • 标签: 太阳能 光电管 太阳能电池 全息区极板
  • 简介:Bexauseofthespecialunderwaterenvironment,manysensorsusedwellinrobotsworkinginspaceoronthehandcannotbeusedintheunderwater.Soanopticalfibertypeslidetactilesensorisdesignedbytheinnermodulationmechanismoftheintensitytypeopticalfiber.Theprincipleandstructureofthesensorareintroducedindetail.Thestaticanddynamiccharacteristicsareanalyzedtheoreticallyandexperimentally.Thedynamiccharacteristicmodelisbuiltandthesimulationismadebyusinggeneticalgorithmbasedonneuralnetwork.Inordertousethesensorperfectly,therecognitionmodelofthesensorisbuiltonthebasisoftheprincipleof“inversesolution”usingneuralnetworks.Thecontrolprecisionandsensitivityofthemanipulatorareimproved.

  • 标签: 滑动触觉传感器 神经网络 光纤传感器 水下机器人
  • 简介:Twenty-twoofatotalof30earthquakeeventsreportedbytheIndonesianAgencyforGeophysics.ClimatologyandMeteorologyduringthetimeperiod2007-2010werefalselyissuedastsunamigenicbytheIndonesianTsunamiEarlyWarningSystem(Ina-TEWS).These30earthquakeswereofdifferentmagnitudesandoccurredindifferentlocations.ThisstudyaimedtoevaluatetheperformanceoftheIna-TEWSusingcommonearthquakeparameters,includingtheearthquakemagnitude,origintime,depth,andepicenter.Intotal.298datasetsassessedbytheIna-TEWSandtheglobalcentroidmomenttensor(CMT)methodwereassessed.TheglobalCMTmethodisconsideredbyalmostallseismologiststobeareferenceforthedeterminationoftheseparametersastheyhavebeenprovedtobeaccurate.Itwasfoundthattheearthquakemagnitude,origintime,anddepthprovidedbytheIna-TEWSweresignificantlydifferentfromthosegivenintheglobalCMTcatalog,whereasthelatitudeandlongitudepositionsoftheeventsprovidedbybothtsunamiassessmentsystemswerecoincident.TheperformanceoftheIna-TEWS.particularlyintermsofaccuracy,remainsquestionableandneedstobeimproved.

  • 标签: 海啸预警系统 评估系统 地震参数 印尼 地震事件 地震震级
  • 简介:Skiniscomposedofbothadermallayer-consistingprimarilyoffibroblasts,andmatrixmacromolecules(ECM)-andanepidermallayer-composingofepidermalcellscontainingkeratinfilamentsundergoingprogressivedifferentiationfromabasalproliferatinglayertoasurfaceconsistingofterminallydifferentiated,epidermalcellsthatprotecttheskinfromtheenvironment.

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  • 简介:Inanefforttodevelopbiomaterialstomeetguidedtissueregeneration(GTR)standardsforperiodontaltissuerecovery,ahomogeneousandtransparentchitosan(CS)/hydroxyapatite(HA)membranewithpotentialapplicationsasGTRbarrierinperiodontaltherapyhasbeenpreparedviainsitucompositing.ThemembranehasbeendesignedtohaveasmoothroughasymmetricstructurethatmeetsthedemandforGTR.ComponentandmorphologyofthemembranearecharacterizedbyXRDandSEM.ItcanbeindicatedthatHAwasinsitusynthesizeduniformlyintheCSmembrane.MechanicalexperimentsofthemembraneswithvariousHAcontentsshowthattheirtensilestrengthsareadequateforperiodontaltherapy.Biologicalpropertiesofthemembranehavebeenperformedbycelltoxicityassays,hemolysistestsandanimalexperiments.Resultsindicatethatthemembranehasgoodbiocompatibilityandinductiveeffectforcellgrowth.ThereforethismembranecanbepotentiallyappliedasGTRbarriermembraneforperiodontaltissueregeneration.

  • 标签: 牙周组织再生 羟基磷灰石 合成制备 牙周膜 壳聚糖 导向
  • 简介:IntheFresneltransformdomain,aneffectiveimprovementtotheconventionaliterativealgorithmfordesigningthediffractiveopticalelements(DOEs)usedforspatialbeamshapinghasbeenproposed.ThealgorithmcansuccessfullyachievetodesignDOEsforbeamshaping.Comparedwithconventionalalgorithm,thisalgorithmcanprovidefasterconvergence,morepowerfulabilitytoovercomelocalminimumproblemandbettershapingquality.Bycomputersimulation,theresulthasshownthattheDOEsdesignedbythisalgorithmhassnchadvantagesashighuniformityatthemainlobe,lowprofileerrorandsteepedge.

  • 标签: 衍射光学 波束成形 菲涅耳区域 激光
  • 简介:Thelargeareaplasticscintillatorfiber(BCF-12)iondetectorarrayismainlymadeof4×108fibers,2×108photo-transmittersand2×108photomultipliertubes.Thefiberwithsinglecladisabout111cmlonganditscrossseetionisasquarewhosesizeis5mm×5mm.Thefibersarearrayedperpendicularlytothedirectionoftheincidentbeam.Eachendsideofeveryfourpiecesoffiberisconnectedtoabendedphoto-transmitter

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