简介:YogabookC930是世界上最薄的双屏幕笔记本电脑,拥有LCD屏幕和E-ink屏幕,轻薄设计更充分表现了其科技性,双屏幕显示的方式更体现了方便的使用性,独特的转轴使得产品的使用性和方便性得到最佳的“使用体验”。其标配的蓝牙触控笔具有4096级压感并支持倾斜功能。YogabookC930是一款多模式设备,可转化成平板电脑模式和E-ink电子书模式。E-ink可在键盘和书写功能之间转换,书写内容能以多种格式应用到LCD屏幕上各类软件里,书写文字可一键转化成键盘所打字体。产品采用极简设计,unibody的设计方式,将所有复杂结构隐藏在极简外表之下,从外观完全看不到分件和螺丝。
简介:Byanalogueexperimentofexhaustgas,thesensitivecharacteristicsoftitaniatoair/fuelratiowasinvestigated.Theeffectsofsomeimpuri-tiesontheelectricconductivityofTiO2,thedeviationof(A/F)cfrom(A/F)sinnonequilibriumgassystemandtheself-catalyticoxidationofTiO2wereexplainedrespectively.Theeffectsofca-talyst,porosityandthicknessofsensorelementontheresponsetimewasalsoanalyzed.
简介:C/C-SiC复合材料是新一代高性能刹车材料,在高速列车、飞机和重型汽车等高能载制动领域具有广阔的应用前景。介绍了C/C-SiC复合材料的制备方法,分析了各种制备方法的优缺点。从材料的物相组成和使役条件两方面分析了C/C-SiC刹车材料摩擦磨损性能的影响因素,介绍了C/C-SiC刹车材料的优化设计,并对未来的研究方向、研究重点进行了展望。
简介:瞄准使用自然地存在的巨大的数量的一个协议为nanostructured浪费例如落叶,果皮和鸡蛋壳合成材料被建议。在这研究,把自然地存在的膜用作支持的一条绿合成线路为nanostructured和多孔的金属的合成被开发--或金属氧化物碳合成电影。不同金属性的离子(公司2+,Ni2+,Fe3+,Mn2+或Cu2+)能容易在Co/C的形成被吸附到鸡蛋膜和跟随的锻烧过程结果上,Ni/C,Fe3O4/C,MnO/C或Cu/Cu2O/CuO/C合成电影。电气化学的研究证明如此的合成电影将在精力领域里有潜在的应用程序。这个方法将为化学合成提供一个一般绿概念并且对全球持续未来有益。
简介:Tomeettheincreasingdemandforadvancedmaterialscapableofoperationover2000℃forfuturethermalprotectionsystemsapplication,C/C—ZrC—SiCcompositeswerefabricatedbyreactivemeltinfiltration(RMI)withZr,Simixedpowdersasrawmaterials.ThestructuralevolutionandformationmechanismoftheC/C—ZrC-SiCcompositeswerediscussed,andthemechanicalpropertyoftheas-preparedmaterialwasinvestigatedbycompressiontest.TheresultsshowedthataftertheRMIprocess,aspecialstructurewithZrC-SiCmulti-coatingasouterlayerandZrC-SiC-PyCceramicsasinnermatrixwasformed.ZrCandSiCrichareaswereformedinthecompositesandonthecoatingsurfaceduetotheformationofZr-SiintermetalliccompoundsintheRMIprocess.MechanicaltestsshowedthattheaveragecompressionstrengthoftheC/C-ZrC-SiCcompositeswas133.86MPa,andthecarbonfibersinthecompositeswerenotseriouslydamagedaftertheRMIprocess.
简介:Samplesofacobalt-basedalloythatunderwentasurfacetreatmentwereevaluated.Thesamples,whichwereobtainedbycastingalloyASTMF75,weregroundandpolishedononesideuntilamirrorfinishwasobtained.Thesampleswereencapsulatedinwollastonite(W)usinguniaxialpressure,treatedat1220℃for1handsubsequentlytemperedinwater.Thecharacterisationofthesampleindicatedthatpartoftheceramicencapsulatingmaterialwasmechanicallyincorporatedonthemetallicsurfacebygrowthoftheoxidelayerofthealloy.Afterthermaltreatment,aseriesofspecimensweresubmergedinasolutionwith5-foldsimulatedbodyfluid(5SBF)for3,5and21days.Characterisationbyscanningelectronmicroscopy(SEM),energydispersivespectroscopy(EDS)andX-raydiffraction(XRD)indicatednucleationandgrowthofahomogenouslayerofapatite,beginningonthethirddaywhenthesamplewassubmerged.