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500 个结果
  • 简介:Graphitehasbeencurrentlyconsideredasapromisingcathodematerialindualionbatteries(DIBs)duetoitsuniquefeaturesofsp2hybridizedcarbonandstackedtwo-dimensionallayeredstructures.However,unexpectedvolume/thicknesschangesinthegraphitecathodes,inducedbytheintercalation/deintercalationofanionswithlargemolecularsizehavebeenknowntobeacriticalproblemindesigningDIBcells.Tounderstandthevolume/thicknesschangesintheDIBelectrodes,inoperandoopticalobservingapparatushasbeenemployedtoobservethecross-sectionviewofagraphite-basedcathodeuponcyclesinthepresentwork.Theobservationsuggeststhatthecathodeinitiallypresentedahugeirreversiblethicknesschange(60%),andsuchthicknessvariationwaspronetoreduceandremain<20%inthefollowingcycles.Theresultsfrombothinoperandoobservationandelectrochemicalcharacterizationscollectivelyindicatethatthegreaterthicknessvariationatinitialcycleshouldbeattributedtobothanionintercalationintographite-basedcathodesandirreversibledecompositionofchemicalcomponentsintheDIBsystem.Themethodherehighlightsauniversalrouteforfundamentallyunderstandingtheelectrodesofhugevolumevariation.

  • 标签: DUAL ion BATTERIES In OPERANDO optical
  • 简介:Thetargetofthelargenegativeionsourcebasedonneutralbeaminjection(N-NBI)istoproduceneutralbeamcurrentof22Aandbeampowerof10MWat500keVwithdurationtimeof10s.Sinceitwassuccessfullyoperatedin1996,the5.3MWneutralbeampowerat380keVwithdurationtimeof3shasbeenachieved.Inrecentyearsimprovingandenhancingthebeampoweraregoingon.Severalreasonssuchasplasmanon-uniformity,higherbeamdensityattheupperregioninthebeamprofile,

  • 标签: 能量限制 能量分配 负离子 中性电子束 等离子体
  • 简介:Inthispaperweconsideranon-standardinverseheatconductionproblemfordeterminingsurfaceheatfluxfromaninteriorobservationwhichappearsinsomeappliedsubjects.Thisproblemisill-posedinthesensethatthesolution(ifitexists)doesnotdependcontinuouslyonthedata.AFouriermethodisappliedtoformulatearegularizedapproximationsolution,andsomesharperrorestimatesarealsogiven.

  • 标签: 反转热传导 病态问题 Fourier调整 抛物线方程 误差估计
  • 简介:一种极端狭窄的双隧道的过滤器原则上被建议anddemonstrated试验性地。这个过滤器借助于二个取样的纤维布拉格栅栏(SFBG)被设计,在一个人是周期的0-pi采样,其它是对称的空间采样的地方。Theformer能在传播系列创造二stopbands,后者能生产twoultra-riarrow通带。我们的过滤器有大约1下午的3-dB带宽,其价值是二ordersof大小不到传统的SFBG过滤器的带宽。建议过滤器有隧道间距仍然是的amerit未改变当调节过滤器时。

  • 标签: 光学纤维 布拉格光栅 滤波器 对称性
  • 简介:新奇结合的聚合物,poly(1),在主要的链包含thiourea一半经由联合反应的铃木被综合。亚铜的离子的增加熄灭荧光(1)而荧光在另外的金属离子的增加之上稍微变化,poly展出荧光灯向Cu+察觉到能力的几乎转弯。当氢过氧化物被加到poly包含的答案(1)和Cu+,Cu时,+被氧化进导致荧光恢复的Cu2+,。H2葡萄糖oxidase(上帝)免除葡萄糖氧化的O2也恢复了荧光poly(1)/Cu+答案。结果显示(1)poly,/Cu+答案能为氢过氧化物和葡萄糖用作一个察觉到的平台。

  • 标签: 荧光化学传感器 共轭聚合物 过氧化氢 铜离子 葡萄糖 硫脲
  • 简介:Anewcomputationschemeproposedtotacklecommensurateproblemsisdevelopedbymodifyingthesemi-analyticapproachforminimizingcomputationalcomplexity.Usingtheproposedscheme,thelimitstateequations,usuallyreferredtoasthefailuresurface,areobtainedfromtransformationofanintervalvariabletoanormalizedone.Inordertominimizethecomputationalcost,twoalgorithmsforoptimizingthecalculationstepshavebeenproposed.Themonotonicityoftheobjectivefunctioncanbedeterminedfromnarrowingthescopeofintervalvariablesinnormalizedinfinitespacebyincorporatingthealgorithmsintothecomputationalscheme.Twoexamplesareusedtoillustratetheoperationandcomputationalefficiencyoftheapproach.Theresultsoftheseexamplesshowthattheproposedalgorithmscangreatlyreducethecomputationcomplexitywithoutsacrificingthecomputationalaccuracy.Theadvantageoftheproposedschemecanbeevenmoreefficientforanalyzingsophisticstructures.

  • 标签: 计算复杂度 可靠性指标 半解析法 非概率 改性 极限状态方程
  • 简介:Wehavestudiedaswitchablehyperbolicmetamaterialcomposedofagraphene–dielectricperiodicstructure.Bytuningthechemicalpotentialofallgraphenesheetssimultaneously,theisofrequencycurvecanswitchbetweenanellipseandahyperbolaconveniently.Inparticular,aspecialhyperbolicisofrequencycurvewithitsasymptoteperpendiculartotheinterfaceisobtainedandusedtorealizethezeroreflectioneffect.Furthermore,azeroreflection-basedopticalswitchworkingintheterahertzspectrumisdemonstrated.Itsbandwidthcanbeefficientlyadjustedbygeometricparameterssuchaspermittivityandperiod.Suchanopticalswitchpossessesthemeritsoflowloss,hightransmittancecontrast,highresponsespeed,compactsize,hightoleranceofchemicalpotential,andhavingallincidentangles(0°–90°)simultaneously.Suchanopticalswitchholdsgreatpotentialinmanyfields,suchasdatastorage,beamsteering,andintegratedphotoniccircuits.

  • 标签: optical switch response compact can ITS
  • 简介:这篇文章学习最佳的消费空闲,公事包和其偏爱被-maxmin提出的一个无穷地过的投资者的退休选择是区分歧义和歧义态度的期望的CES用途。采用递归的multiplepriors用途和向后的随机的微分方程(BSDE)的技术,我们转变-maxmin期望的CES用途进在与投资者无常的度有关的一项新概率措施下面的一个古典期望的CES实用程序。我们的模型调查最佳的consumption-leisure-work选择,最佳的公事包选择,和最佳的停止问题。在这个模型,投资者能与一种退休选择一起在某个最小的工作小时上面灵活地调整她劳动的供应。问题能是使用变化不平等解决的经分解。并且当她的财富超过某个批评水平时,最佳的退休时间作为第一次被给。在退休前后的最佳的消费空闲和公事包策略在关上的形式被提供。最后,在没有暧昧的从那些的歧义下面的最佳的消费空闲,公事包和批评财富水平的区别被讨论。

  • 标签: CES 投资者 组合和 消费 休闲 退休
  • 简介:Inthispaper,moreefficient,low-complexityandreliableregionofinterest(ROI)imagecodecforcompressingsmoothlowtextureremotesensingimagesisproposed.WeexploretheefficiencyofthemodifiedROIcodecwithrespecttotheselectedsetofconvenientwaveletfilters,whichisanovelmethod.SuchROIcodingexperimentanalysisrepresentinglowbitratelossytohighqualitylosslessreconstructionwithtiminganalysisisusefulforimprovingremotesensinggroundtruthsur-veillanceefficiencyintermsoftimeandquality.Thesubjective[i.e.fair,fiveobserver(HVS)evaluationsusingenhanced3DpictureviewHypermemorydisplaytechnology]andtheobjectiveresultsrevealedthatforfastergroundtruthROIcodingapplications,theSymlet-4adaptationperformsbetterthanBiorthogonal4.4andBiorthogonal6.8.However,thediscreteMeyerwaveletadaptationisthebestsolutionfordelayedROIimagereconstructions.

  • 标签: 地面实况 ROI 图象编码技术 小波滤波器 应用
  • 简介:短离子的液体(IL)基于的A整体的子弹被准备并且用作选择抽取吸着剂。在材料由领域被评估以后扫描排放的电子显微镜学(FE-SEM),为从Chamaecyparisobtusa的橡黄素和myricetin的抽取和决心的一条新途径(C。obtusa)由使用基于ILs的、整体的子弹,系统被开发。色析法的分析在372nm与紫外察觉在C18列上被进行,由acetonitrile水组成的一个eluting答案(25/75,V/V)作为活动阶段,和0.7mL琠慨?癥湥的流动率吗?

  • 标签: 选择性提取 离子液体 槲皮素 墨盒 单片 杨梅
  • 简介:Anewmethodforfabricatingorderedporoussiliconisreported.Atwo-dimensionalsilicananospherearrayisusedasatemplatewithahydrofluoricacid-hydrogenperoxidesolutionforetchingthenanospheres.Theinitialdiameteranddistributionoftheholesintheresultingporoussiliconlayeraredeterminedbythesizeanddistributionofthesilicananospheres.Thecorrosiontimecanbeusedtocontrolthedepthsoftheholes.ItisfoundthatthepresenceofaSiO_2layer,formedbytheoxidationoftheroughinternalsurfaceofthehole,istheprimaryreasonallowingthecorrosiontoproceed.Ultravioletreflectionandthermalconductivitymeasurementsshowthatthediameteranddistributionoftheholeshaveagreatinfluenceonpropertiesoftheporoussilicon.

  • 标签: 二氧化硅层 制备方法 多孔硅 有序 模板 二维
  • 简介:Anewtypeofpalladiumchelateofβ-diketone-basedsidechainliquidcrystalpolysiloxane(Pd-DKLCP)hasbeensynthesizedbychelationreactionofpalladiumdichloridewithpolymericligand,β-diketonepolysiloxane(DKLCP),usingTHFassolventatR.T..ThePd-chelationresultsingreatlyincreasingthephasetransitiontemperatureTKandtheenthalpychange△HKfromcrystaltoliquidcrystalstateandmakingthetemperaturerangeofLCstate△T(△T=TCl-TK)widened.AllthesechelatesPd-DKLCP’sdonotshowTCluntildecompositionat205℃.ItisnoteworthythatthePd-chelationcanexertmorepositiveeffectonthemesomorphicbehaviourofthepolymerligandthanthecounterpartCu-DKLCPdoes.Itisprobableduetothebiggersizeofdisc-likemesogenformedfromβ-diketoneandPd+2ionwith4dorbital.

  • 标签: Β-DIKETONE PALLADIUM CHELATE Metal-coordinating liquid crystal
  • 简介:Amulti-loopadaptiveinternalmodelcontrol(IMC)strategybasedonadynamicpartialleastsquares(PLS)frame-workisproposedtoaccountforplantmodelerrorscausedbyslowaging,driftinoperationalconditions,orenvironmentalchanges.SincePLSdecompositionstructureenablesmulti-loopcontrollerdesignwithinlatentspaces,amultivariableadaptivecontrolschemecanbeconvertedeasilyintoseveralindependentunivariablecontrolloopsinthePLSspace.Ineachlatentsubspace,oncethemodelerrorexceedsaspecificthreshold,onlineadaptationrulesareimplementedseparatelytocorrecttheplantmodelmismatchviaarecursiveleastsquares(RLS)algorithm.BecausetheIMCextractstheinverseoftheminimumpartoftheinternalmodelasitsstructure,theIMCcontrollerisself-tunedbyexplicitlyupdatingtheparameters,whicharepartsoftheinternalmodel.Bothparameterconvergenceandsystemstabilityarebrieflyanalyzed,andprovedtobeeffective.Finally,theproposedcontrolschemeistestedandevaluatedusingawidely-usedbenchmarkofamulti-inputmulti-output(MIMO)systemwithpuredelay.

  • 标签:
  • 简介:为氢硫化物(H2S)的控制的一个凳子规模实验排出物被使用与ZX01填满包装的流简历的过滤器连续地执行将近四个月。结果建议流简历的过滤器在实质的运作的时期上证明性能优秀。H2S的移动效率是将近百分之百当从0.64g/改变的流简历的过滤器的容量的装载时(m[3]·h)到38.20g/(m[3]·h);H2S的新陈代谢产品主要由SO4组成[2]。当H2S的入口集中是250mg/m时[3],最佳气体保留时间是30s;最佳水花水流动率是0.0059~0.012L/(厘米[2]·h)。流简历的过滤器有好能力抵抗高容量的装载的吃惊,;没在哪个电阻在相对更低的价值被维持期间在实验期间被堵住将近四个月,以便流简历的过滤器不必执行回来经常洗;能稳定地被操作为长期。

  • 标签: 过滤器 氢化硫 除臭技术 实验
  • 简介:Theeffectsoftwogeometricrefinementstrategieswidespreadinnaturalstructures,chiralityandself-similarhierarchy,onthein-planeelasticresponseoftwo-dimensionalhoneycombswerestudiedsystematically.Simpleclosed-formexpressionswerederivedfortheelasticmoduliofseveralchiral,antichiral,andhierarchicalhoneycombswithhexagonandsquarebasednetworks.Finiteelementanalysiswasemployedtovalidatetheanalyticalestimatesoftheelasticmoduli.Theresultswerealsocomparedwiththenumericalandexperimentaldataavailableintheliterature.WefoundthatintroducingahierarchicalrefinementincreasestheYoung'smodulusofhexagonbasedhoneycombswhiledecreasestheirshearmodulus.Forsquarebasedhoneycombs,hierarchyincreasestheshearmoduluswhiledecreasingtheirYoung'smodulus.IntroducingchiralitywasshowntoalwaysdecreasetheYoung'smodulusandPoisson'sratioofthestructure.However,chiralityremainstheonlyroutetoauxeticity.Inparticular,wefoundthatanti-tetra-chiralstructureswerecapableofsimultaneouslyexhibitinganisotropy,auxeticity,andremarkablylowshearmodulusasthemagnitudeofthechiralityoftheunitcellincreases.

  • 标签: 分层蜂窝结构 手性结构 弹性响应 能量 杨氏模量 剪切模量
  • 简介:二根比色的探针基于为Hg2+的察觉的oxazine-thione1a和1b被设计并且综合。关于在荧光和一种颜色的70褶层改进的探查1a展览在acetonitrile/wate溶剂在Hg2+的增加以后变化。1a对在另外的金属离子上的Hg2+也高度选择。而且,DFT/TDDFT计算被拿向在离开上解释排放反应。

  • 标签: 荧光增强 探头 硫酮 恶嗪 OFF 比色法