简介：本文制备了Bi2O3-Ni2O3纳米粉末,对其结构进行了表征,并研究了制备的纳米粉末对苯光催化降解的影响因素。结果表明：制备的纳米粉末由Bi2O3和Ni2O3复合而成,经750℃焙烧的光催化剂对苯光催化降解活性最高;水蒸气的加入和氧气的增加,都能促进苯的降解率增大;由Langmuir-Hinshelwood动力学模型得出苯的光催化降解反应的吸附常数和反应速率常数分别为0.1398L·μmol^-1和0.0024μmol·L-1·min^-1。

简介：摘要采用溶胶-凝胶法制备了Al2O3-ZrO2复合溶胶膜，研究了化学组成和添加剂对复合溶胶的影响。结果表明，当Al2O3/ZrO2=1，DMF=40vol%时，可得到澄清透明，粘度适中，稳定性好，且凝胶干燥后几乎无开裂的溶胶膜

简介：BasedonthetechniqueforpreparingLaCl3viadirectpyrolysisofrareearthchloridesolution,ajetpyrolysisreactorwasdesignedandtheintra-reactortemperatureandchemicalreactionswerenumericallysimulatedusingcomputationalfluiddynamics(CFD)technique.Theresultsshowthattheflowratevariationatthefuelinletdoesnotlargelyaffectthetemperatureinthereactor,whiletheincreaseinexternalpressureatthematerialinletrapidlydecreasestheaveragetemperature,Venturitemperature,andoutlettemperature.TheCH4andO2insidethereactorarecombustedcompletely,andwhenthematerialinletpressureis\90Pa,theLaCl3isfullypyrogenated.ThecontentsofCO2,La2O3,andHClfluctuateneartheVenturitubeandfinallystabilize.La2O3contentattheoutletisinatop-to-bottomgradient.

简介：Inthepresentstudy,sampleswereextensivelycollectedthroughoutthestainlesssteelmanufacturingprocess.Thethree-dimensionalmorphologyofinclusionswasrevealedbynon-aqueoussolutionelectrolysis.Thehighconcentrationofaluminuminferrosiliconcausedtheincrementof[Al]sinsteelandAl2O3ininclusions,whichledtothehighermeltingtemperatureofinclusions.ItwasconcludedthattheapplicationoflowAlferrosiliconandcalciumtreatmentcouldpreventtheformationofAl2O3-richinclusions.

简介：ToimprovethemechanicalpropertiesofWC-Al2O3composites,theeffectsoftraceamountofCeO2additivesonthemicrostructureandmechanicalpropertiesoftheWC-Al2O3compositespreparedbyhotpressingwereinvestigated.TheresultsrevealedthattheWC-Al2O3compositesdopedwith0.1%CeO2possessedrefinedmicrostructureandenhancedmechanicalpropertiescomparedwiththatoftheundopedWC-Al2O3composites.TraceCeO2suppressedthedecarburizationofWC,promotedthemicrostructuralrefinement,andimprovedtheinterfacecoherenceoftheWCmatrixandAl2O3.When0.1%CeO2wasaddedtotheWC-Al2O3composites,theeffectofCeO2resultedintheachievementofarelativedensityof98.82%withanexcellentVickershardnessof16.89GPa,combiningafracturetoughnessof9.85MPa·m1/2withanacceptableflexuralstrengthof1024.05MPa.

简介：各路概念新颖的租赁平台在资本市场中春风得意，激烈地争夺着用户和数据资源，它们之间的较量正在倒逼传统租房行业变革。“互联网＋”的热风一起，吹燥了无数蠢蠢欲动的资本和机构，当租房市场乘骑了“互联网＋”的东风，一切都变得不一样了。

简介：“双11”后等待快递的日子里，社区O2O又成热点。房地产行业进入白银时代，房企逐渐意识到物业业务中隐藏的价值，并依托互联网，通过打造社区O2O平台，深层次挖掘物业服务中存在的价值。

简介：建立了碱熔水浸的方法溶解试样,ICP-AES法同时测定钛铁矿中硅和铝的方法,对分析过程中的一些条件进行了研究,该法用于测定钛铁矿中SiO2和Al2O3,得到了满意的结果,相对标准偏差为3.00%~5.04%,回收率在96.5%~103.8%之间。

简介：HotcompressionbehaviorofTiC–Al2O3/AlcompositeswasstudiedusingtheGleeble-1500systematatemperaturerangeof300–550°Candatstrainraterangeof0.01–10.00s-1.TheassociatedstructuralchangeswerestudiedbyTEMobservations.Theresultsshowthatstressleveldecreaseswithdeformationtemperatureincreasingandstrainratedecreasing,whichcanberepresentedbyaZener–Hollomonparameterinanexponent-typeequationwithhotdeformationactivationenergyQof172.56kJ·mol-1.Dynamicrecoveryoccurseasilywhenstrainratesarelessthan10.00s-1.Dynamicrecrystallizationcanoccuratstrainrateof10.00s-1.

简介：9月17日,“到家美食会”正式宣布完成D轮融资,本轮融资金额5000万美元,由京东和麦格理共同领投。此前到家美食会已先后获得晨兴、鼎辉、京东等国际知名风投和上市公司的三轮投资。

简介：ExtractingB2O3fromcalcinedboronmud(CBM)wasstudied.TheeffectoffactorssuchasreactiontemperatureandNaOH-to-CBMmassratioonB2O3extractionefficiencywasinvestigated.TheresultsshowthatincreasingreactiontemperatureandNaOH-to-CBMmassratioincreasesB2O3extractionefficiency.TherearetwostagesfortheB2O3extractingprocess:0–20ministhefirststage,whichisrapid;20–50ministhesecondstage,whichisslowerthanthefirststage.Theoverallextractingprocessfollowstheshrinkingcoremodel,andthefirstandsecondstagesaredeterminedtoobeythesurfacechemicalreactionmodelandthediffusionthroughtheproductslayermodel,respectively.Theactivationenergiesofthefirstandsecondstagesarecalculatedtobe41.74and15.43kJ·mol-1,respectively.TheB2O3extractingkineticsequationsofthefirstandsecondstagesarealsoobtained.

简介：Thispaperreportsonthelongevityofglycerol-dry(CO2)reformingoverthelanthanum(La)promotedNi/Al2O3catalysts.TheXRDresultsshowedthattheNiparticlewaswell-dispersedinthepresenceofLapromoter.Inaddition,viatheNH3-TPDanalysis,itwasfoundthattheLapromoterhasreducedtheacidityofNicatalystwhichmayhaveexplainedthemitigationofcarbonlaydown.Itwasdeterminedthatthe3.0wt%La-promotedNi/Al2O3catalystpossessedthelargestBETspecificsurfaceareaof97m2g-1.Consequently,ityieldedthebestcatalyticlongevityperformancewithconversionattainedmorethan90%,evenafter72hofreactionduration.Significantly,itcanbeconfirmedthatthepresenceofCO2duringtheglyceroldryreformingwasessentialinreducingcarbondeposition,mostlikelyviagasificationpathway.Thishasensuredastabilityofcatalyticactivityforalongreactionperiod(72h).

简介：在这个O2O（线上线下电子商务）炒爆的时代，很多人都喜欢去这个风口上凑一下热闹，尤其一些志存高远的创业者，都希望能借O2O这股风将自己吹向云端。

简介：“O2O不仅是商业的机会，更重要的是对未来人们生活方式的改变。“IDG资本创始台伙人熊晓鸽这样预示未来的趋势。正如他所说，过去一年多里，风险投资机构将新型O2O作为投资方向，创业者也纷纷进入，出现了很多新的模式和玩法，把互联刚边界扩人到以前无法触及的很多领域．让O2O真正成为一种在线生活方式。越来越多个人，把自己的技能、产品或闲置资源．变成人与网络、物品与网络、网络与网络的节点，这些新模式对传统行业的原有规则极具颠覆性。

简介：Thecorrosionofrefractoriesresultsfromreactivetransport,namely,transportofagentsandchemicalreactionsoftheseagentswithimpregnatedmedium.Ononehand,thetransportinvolveseitherdiffusionorimpregnationdependingonthestateofthecorrosiveagentsandthemicrostructureofthehostmedia.Ontheotherhand,chemicalreactionsmaybeverynumerousandcomplex.ThisstudyfocusedonthereactiveimpregnationofAl2O3-CaOslagintoporoushighaluminarefractory.Thetransportpropertiesoftherefractorymaterialwereidentifiedbymeansofadedicatedcapillaryrisingtest.ChemicalreactionsbetweenthesolidhighaluminaskeletonandAl2O3-CaOslaginvolvesuccessivedissolution/precipitationmechanismsformingaluminatesoflime.Contrarytothethermodynamicpropertiesofthebinarysystem,thekineticsofthesesolid/liquidreactionsisnotwellknown.Corrosiontestsassociatedwiththequenchingmethod,XRDanalyseswereperformedforabetterunderstandingofthekinetics.Theresultsofthisstudyopenupacouplingapproachforpredictingthecorrosionwearofrefractory.

简介：Inthisarticle,nano-scaleAl/Fe2O3compositeswithdifferentmorphologiesweresuccessfullyobtainedbyasimpleelectrospinningtechnique,whichisbasedonasurfactant（polyvinylpyridine,PVP）inamixtureofN,N-dimethylformamide（DMF）and2-propanol.TheelectrospunAl/Fe2O3compositesexhibitedacrystalstructureandphasecompositionbyX-raydiffractionanalysis.ThedifferentmorphologiesoftheAl/Fe2O3compositeswerealsoobservedthroughscanningelectronmicroscopyandtransmissionelectronmicroscopy.Itwasfoundthattherathersimpleelectrospinningmethodusedtopreparethemorphology-controlledAl/Fe2O3compositesmayhavethepotentialforpreparationofpropellants,explosives,andpyrotechnicsinthefuture.

简介：据中华全国商业信息中心日前发布的数据显示,今年前两个月,全国百家重点大型零售企业零售额累计下降1.0%,增速较去年同期下降25个百分点,是2011年以来的最低增速。网购大潮袭来,实体零售业受到了不少冲击,再加上经济增速放缓等因素的影响,零售业转型思变刻不容缓。从线上到线下的O2O模式,就成为不少零售商的求变之选。对于林产品零售业而言亦是如此。

简介：展览当天凌晨，胡湖在朋友圈发布捷报，大部分通过姐夫拍群、通过微信群拍和私洽结合的方式售出。第二天，最大一幅作品《乾灵》以12．5万元被成功拍卖。杨画廊与“姐夫拍”实现了第—次画廊界实时O2O互动。2014年的情人节是农历马年的元宵节，供职于泓盛拍卖的胡湖把朋友圈里的拍卖同行、媒体伙伴、学术大牛统统拉到“阿特姐夫”群里，试着在这里以群聊叫价的方式拍卖小件作品。

简介：介绍了电商的优势和危机，提出从O2O发展到互联网＋，零售业不仅仅要做加法，还要综合实施“加减乘除法则”。

简介：随着互联网的普及和信息技术的发展,传统医疗模式发生了根本性变革,出现了线上与线下相结合的医疗O2O模式。本文在对医疗O2O模式基本概念进行剖析的基础上,归纳总结现阶段我国的发展现状,详细分析了该模式在实际应用中存在的问题及原因,并对其应用前景进行了展望。