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295 个结果
  • 简介:微隧道通常在0.3nm的范围与孔指矿物质的结构的隧道到2.0跑。如此的微隧道包括,K在cryptomelane充满的Mn-O八面体隧道,和Si-O和Al-0四角形的分子的筛构造的隧道在沸石由Na和Ca充满了,并且有效地有分子的筛的功能。这里,我们指出自然矿物质的ultra-microchannels与离子的筛的特征在0.3nm下面有孔。矿物质长石的ultra-microchannels,为地球的半团的财务“scrust,因为孔是太小的,大部分被忽略了。在这个工作,我们在场那长石显示离子交换的某个度并且在高、低的温度下面拥有隧道结构的一个特征。在高温度,Na~+能进入长石的隧道。在直到15.9%的长石增加的Na_-O的Thecontent。在中间的温度,Pb~(2+)能也作为离子交换的结果进入长石的隧道,这样带到形成ofPb长石。在房间温度,大约97.94%Cd~(2+)能被移开,Cd长石能被获得。这些现象显示长石的ultra-microchannels的典型效果,它可以为重金属污染和原子废物的处理作为一个潜力被建议。自然矿物质的Theultra-microchannels在移植和交换ofgeomaterials起了特殊作用。一些自然矿物质的微隧道的分子的筛有净化分子的煤气的污染的性质。并且很自然的矿物质的ultra-microchannels的离子的筛能净化离子的水污染。

  • 标签: 矿物学 隐钾锰矿 长石 微通道效应 离子筛
  • 简介:Indentationisasimpleandnondestructivemethodtomeasurethemechanicalpropertiesofsoftmaterials,suchashydrogels,elastomersandsofttissues.Inthiswork,wehavedevelopedamicro-indentationsystemwithhigh-precisiontomeasurethemechanicalpropertiesofsoftmaterials,wheretheshearmodulusandPoisson’sratioofthematerialscanbeobtainedbyanalyzingtheload–relaxationcurve.Wehavevalidatedtheaccuracyandstabilityofthesystembycomparingthemeasuredmechanicalpropertiesofapolyethyleneglycolsamplewiththatobtainedfromacommercialinstrument.Themechanicalpropertiesofanothertypicalpolydimethylsiloxanesamplesubmergedinheptanearemeasuredbyusingconicalandsphericalindenters,respectively.ThemeasuredvaluesofshearmodulusandPoisson’sratioarewithinareasonablerange.

  • 标签: 测量系统 机械性能 软质材料 微压痕 设备发展 聚二甲基硅氧烷
  • 简介:Thispaperwastoinvestigatebasicpropertiesofmicro/nanofibrilsfrompoplarwithahighpressurehomogenizer.Theirbasicpropertiesweretestedbylaserparticlesizeanalyzer,scanningelectronmicroscopy(SEM)andX-raydiffractometer(XRD).Thetestresultsshowedthatifthefiberslurrymovedfrom20to40circulationsthroughthehomogenizer,for10%ofthemicro/nanofibrils,theparticlesizewasreducedfrom1.2μmto160nmanditssurfaceareaperunitvolumewasincreasedfrom1.63×104...

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  • 简介:Propagation-basedphase-contrastimagingwassimulatedbasedonparaxialFresnel-Kirchoffdiffractionintegralandsphericalwaveillumination.Underadevelopedmicro-CTsystemparameters,theeffectsoffocal-spotsizeandimaginggeometryonphase-contrastimaginghavebeeninvestigatedusinga2-mm-thicknesspolystyreneedgephantom.Anequivalentmono-energywasusedtosubstitutethepolychromaticspectrumofthemicro-focusX-raysource.Toconsidereffectsoffocal-spotsizeanddetectorresolution,theobtainedphase-contrastimagewithanidealpointsourcewasconvolvedwithsourceintensitydistributionandpointspreadfunctionofdetector.Simulationsshowreasonableinfluencesofthetwoparameterswhichareingoodagreementwithexperimentalresults.

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  • 简介:我们在这份报纸在场计划方法的一条柔韧的联机路径,它在否认GPS、撒布障碍的环境安全地允许一只微旋转飞机雄蜂到苍蝇与限制了机载的计算力量。途径基于到二个点边界价值问题(TPBVP)的一张高效地管理的格子地图和一个靠近形式的答案。而TPBVP的答案产生光滑的轨道,格子地图帮助轨道评估。最后,交换算法的一条最高层的轨道被利用最小化计算费用。建议途径的优点包括它计算资源的保存,轨道产生的坚韧性和对未知环境的反应的活泼。结果在实际雄蜂平台上被认识到并且成功地在真实飞行测试示威了。飞行测试的录像能被发现在:http://uav.ece.nus.edu.sg/robust-online-path-planning-Lai2015.html。

  • 标签: 无人机平台 路径规划 环境 在线 两点边值问题 旋翼
  • 简介:为了完成操纵者的软掌握,工作,钥匙是有与好性能滑动传感器。取决于弹性体和光电的元素在手里安装了,传感器转变在掌握的目标和机器人的手之间的滑动到电的信号,因此,滑动能被检测。它当目标是滑动时,愿望原因弹性体是微颤动的。基于颤动理论,动态理论,轻紧张理论和有弹性的变丑理论,发源是目标是机器人的手有的滑动加速relativingto的结论与光电的元素的产量的线性关系电压的微分,然后为滑动区分的模型被建立。

  • 标签: 滑动传感器 发送器 光电效应 振动检测
  • 简介:Rare-earthcoordinationpolymers(RECPs),asafamilymemberofcoordinationpolymers(CPs),havebeenpreparedandstudiedwidely.Thankstotheircharacteristicpropertiesandfunctions,RECPshavealreadybeenusedinvariousapplicationfieldsrangingfromcatalysistodrugdelivery.Inrecentyears,CPswithtunablemorphologiesandsizeshavedrawnincreasinginterestandattractiveattention.ThisreviewpresentstherecentresearchprogressofRECPmicro/nanomaterials,andemphasizesthepreparation,propertiesandbroadapplicationsofthesefascinatingmaterials.

  • 标签: COORDINATION POLYMER METAL-ORGANIC framework RARE earth
  • 简介:Lens-likevateriteCaCO3microringscomposedofCaCO3nanoparticlesweresynthesizedviaamicro-emulsion-mediatedrouteatroomtemperaturewithethanolandn-hexanolasco-surfactant.Thisprocessdidnotde-mandanyadditionalenergysuchasheatingorcontinuousagitation.Itwasthefirsttimetouseethanolasco-surfactantinthesynthesisofmicroornanomaterials.AndtheethanolwasbelievedtoplayanimportantroleintheaggregationfashionofCaCO3nanoparticles.Moreover,shuttle-shapednanorods,hexagonalnanoplates,andrice-likenanoparticleswerealsofabricatedbymodulatingthegrowthparameters.Additionally,theintroduceofethanolintomicroemulsionsasco-surfactantmaybegeneralizedasanovelgreenroutetocontrolthestructureofotherfunctionalmaterials.

  • 标签: 纳米碳酸钙 微乳液 合成 纳米晶 表面活性剂 可控
  • 简介:摘要:微型发光二极管(Micro-LED)是继有机发光二极管(OLED)后最为前沿的显示技术,相对于液晶显示(LCD)和有机发光显示(OLED)其具有更快的响应时间、更长的使用寿命以及更高的像素密度。但在Micro-LED技术中的巨量转移工艺一直是阻碍其商业应用的最大障碍。本文针对Micro-LED巨量转移技术现状和国内外专利申请情况进行研究,了解主要申请人的专利布局并梳理Micro-LED巨量转移技术发展脉络。重点分析领域内重要申请人的专利布局,旨在掌握当前的专利布局情况避免侵权风险,并预测未来专利申请的发展趋势。最后,针对相关企业在Micro-LED巨量转移技术研发提出了措施建议。

  • 标签: Micro-LED 巨量转移。
  • 简介:在物证检验中,经常遇到用圆珠笔涂改、伪造合同书、票证、单据和契约等案件。对这类案子的侦破除了需要对纸张、笔迹进行鉴定外,还需要对圆珠笔油进行鉴定,以获得直接证据。但对文件上书写笔痕(圆珠笔油)的无损检测并非易事。

  • 标签: 圆珠笔油 物证检验 直接证据 侦破 案件 笔迹
  • 简介:摘要:如何使党建精准地推动住房公积金业务开展是一个难题。找准了微党建与住房公积金细分业务的结合点,实现了住房公积金业务的微创新,推动了住房公积金业务的细微改良,具有实际的借鉴意义。

  • 标签: 住房公积金 细分业务 微党建 微创新
  • 简介:Thenon-tidalvariationgainedfromcontinuousgravityobservationsinstationsusuallyreflectstheregionalcontinuousgravitychanges.Inthispaperwefocusonstudyingthenon-tidalvariationofBaijiatuanstation,Beijingwheretherearetwodifferentgravimeters(namely,L&R-804andPET-031).Basedontheoriginalrawtidalrecordsoftwogravimetersfrom2008to2011,wefirstremovevariousinterferencefromrawdatabythestandardproceduresoftware-Tsoft;thenwemodelthesolidearthtides,oceantidalloadingandpoletidethroughrelatedparameters;afterthatweadoptanewsegmentedpolynomialfittingmethodbasedonTsofttofitthecomplexdriftofspringgravimeter;andfinallywecalculatetheatmosphericloadingeffectsbyalinearregressionmodel.Afteraseriesofprocessingwegainthenon-tidalvariationofthetwogravimetersatBaijiatuansite,Beijing.Furthermore,toanalyzethenon-tidalvariationpreliminarily,westudythemaincomponentofrelatedtidaldatabypowerspectraldensity.Comparingthenon-tidalvariationoftwodifferentgravimeters,wefindseasonalfluctuationsinnon-tidalresults,whichareinaccordancewiththewaterstoragechange.Therefore,wetakeintoaccounttherelevanceofgravitychangesandwaterstoragebasedonthegravitydataofGRACEandwaterdataoftheCMAPmodelfrom2003to2011atdifferentsitesintheChinesemainland(Beijing,Chengdu,ShenyangandShiquanhe),andmakeapreliminaryanalysisontherelationshipbetweengravitychangesandwaterstorage.

  • 标签: 潮汐变化 重力变化 北京 蓄水 线性回归模型 重力仪
  • 简介:Micro-electrondiffraction(MicroED)isanemergingtechniquetousecryo-electronmicroscopetostudythecrystalstructuresofmacromoleculefromitsmicro-/nano-crystals,whicharenotsuitableforconventionalX-raycrystallography.However,thistechniquehasbeenpreventedforitswideapplicationbythelimitedavailabilityofproducinggoodmicro-/nano-crystalsandtheinappropriatetransferofcrystals.Here,wedevelopedacompleteworkflowtopreparesuitablecrystalsefficientlyforMicroEDexperiment.Thisworkflowincludesinsituon-gridcrystallization,single-sideblotting,cryo-focusionbeam(cryo-FIB)fabrication,andcryo-electrondiffractionofcrystalcryo-lamella.ThisworkflowenablesustoapplyMicroEDtostudymanysmallmacromolecularcrystalswiththesizeof2-10μm,whichistoolargeforMicroEDbutquitesmallforconventionalX-raycrystallography.Wehaveappliedthismethodtosolve2.5Acrystalstructureoflysozymefromitsmicro-crystalwithinthesizeof10×10×10μm^3.OurworkwillgreatlyexpandtheavailabilityspaceofcrystalssuitableforMicroEDandfillupthegapbetweenMicroEDandX-raycrystallography.

  • 标签: Cryo-electron MICROSCOPY Cryo FOCUSED ion beam