简介:Ferrumniobatewassynthesizedbysolid-phasesinteringmethodinavacuumcarbontubefurnaceat1300℃for180min.ThephasetransformationofferrumniobatecarbothermalreductionprocesswasstudiedbyXRD.ThereductionreactionsofferrumniobateindifferenttemperaturestagesweredeterminedbytheTG-DSCcurve.Meanwhile,accordingtotheTGcurve,thereactionkineticsparameterswerecalculatedbyA.W.Coatsintegrationandthecontrolstepsindifferenttemperaturestageswereascertained.Theresultsshowedthatthereductionofferrumniobatestartsatthetemperatureof1000℃,andthereductionprocesscarriesoutintwostepsaccordingtosinteringtemperature.Inatemperaturerangeof1000-1238℃(thefirststep),themainreductionproductsareNbO2andFe;thekineticequationofinitialstageis[-ln(1-α)]4=kt,controlledbynucleationgrowth,andtheapparentactivationenergyis388kJ/mol;withthetemperatureincreasing,thekineticequationisα+(1-α)ln(1-α)=kt,whichistheValensitwo-dimensionaldiffusionkineticequation,andtheapparentactivationenergyis264.4kJ/mol.Themainreactioninarangeof1238-1344℃(thesecondstep)isthereductionofNbO2toNbC,thekineticequationis[(1-α)-1/3-1]2=kt,whichiscontrolledbythethree-dimensionaldiffusion,andtheapparentactivationenergyis482.7kJ/mol.
简介:作为水泥,磨擦在粒子特征和水泥的机械性质上帮助的修改triethanolamine的效果被学习,并且它的反应机制被红外,希腊语的第六个字母潜力,SEM,XRD和TG-DTA分析。结果证明为有0.015%修改triethanolamine(M茶)的水泥的332个m粒子的内容被12.4%增加,并且有0.03%M茶的水泥的压缩力量被5.5和8.2MPa分别地在3和28天增加。并且在水泥上磨擦和M茶的改进效果比triethanolamine好。机制分析显示出那M茶不仅氨基并且氢氧根茶组织,而且有酉旨,羰基,容易与水泥矿物质的金属离子结合的carboxyl组,导致那M茶能支持表面吸附并且在表面和粒子的裂缝节防护不饱和的费用,因此,粒子重聚被阻止,磨擦效率被改进。水泥上的M茶的改进主要躺因为它能与石膏和水支持或导致水泥矿物质的水和反应,它加速水和产品的形成,然后改进水泥水和产品的结构和形态学,因此,产品结构的一致性和紧密被增加。
简介:Globalmitigativeandadaptiveeffortshavenotbeenabletoeffectivelyaddresstheadverseimpactscausedbyclimatechange.Therefore,adirectsolutionisneededtoaddressthesignificantresultinglossanddamage(L&D).DuringtheUnitedNationsFrameworkConventiononClimateChangeheldinDohain2012,theissueofrespondingtoL&Darisingfromclimatechangegainedsuddentractionandbecameoneofthekeyissuesthataffectedtheoutcomeoftheconvention.Inthispaper,astudyonthedefinitionandconnotationsofL&Darisingfromclimatechangewasconducted,togetherwithananalysisofitsrelationshipwithrelatedconcepts,namelyimpacts,vulnerability,andrisks.ThisledtotheproposalofanL&Dconceptualmodelthatismorecomprehensive,withtherecognitionoftheneedtoaddresstheissuethrougheffectivesupplementationofexistingmitigativeandadaptiveefforts.AsystematicelaborationofanL&Dresponsemechanismwasmadebasedonpolitics,law,andthemarket,leadingtoapreliminarypresentationofapossibleformatforanL&Dmechanism.PotentialacademicresearchdirectionsforL&DwerealsoproposedthatcouldserveasreferencesfortheestablishmentofinternationalandnationalL&Dresponsemechanismsandrelatedresearch.
简介:Inthispaper,aheavyseafogeventoccurringovertheYellowSeaon11April2004wasinvestigatedbaseduponobservationalandmodelinganalyses.Fromtheobservationalanalyses,thisseafogeventisatypicaladvectioncoolingcase.Seasurfacetemperature(SST)andspecifichumidity(SH)showstronggradientsfromsouthtonorth,inwhichwarmwaterislocatedinthesouthandconsequently,moistureislargerinthesouththaninthenorthduetoevaporationprocesses.Afterfogformation,evaporationprocessprovidesmoremoistureintotheairandfurthercontributestofogevolution.TheseafogeventwasreproducedbytheRegionalAtmosphericModelingSystem(RAMS)reasonably.Therolesofimportantphysicalprocessessuchasradiation,turbulenceaswellasatmosphericstratificationinseafog’sstructureanditsformationmechanismswereanalyzedusingthemodelresults.Therolesoflongwaveradiationcooling,turbulenceaswellasatmosphericstratificationwereanalyzedbasedonthemodelingresults.Itisfoundthatthelongwaveradiativecoolingatthefogtopplaysanimportantroleincoolingdownthefoglayerthroughturbulencemixing.Thefogtopcoolingcanoverpowerwarmingfromthesurface.Seafogdevelopsupwardwiththeaidofturbulence.Thebuoyancyterm,i.e.,theunstablelayer,contributestothegenerationofTKEinthefogregion.However,thetemperatureinversionlayerpreventsfogfromgrowingupward.
简介:在沥滤的Pb之间的关系当在它的团结的形式的水泥在酸媒介被沥滤时,有时间的集中和答案pH被分析。团结的形式,增加方法的水泥,和Pb团结上的水和度的粒子尺寸的效果也被调查。试验性的结果显示水泥快速被溶解,形成有好吸附的C-S-H胶化或硅的酸大音阶的第五音并且在酸媒介含水。当cement-Pb团结了时,形式在一个醋酸盐答案被沥滤,含水的产品与时间侵蚀,Pb集中因此在开始稍微增加。然后,一些Pb离子被最新产生的硅的酸大音阶的第五音吸收,C-S-H。其它生产Pb(哦)为第二等的团结的2降水,在超过二个小时的一沥滤的时间在Pb集中导致渐渐的减少。而且,团结的形式的粒子尺寸在Pb溶解上有重要效果。当增加的水泥的数量是低的时,与不到9.5的pH,团结影响原来的水泥粉末的顺序,水泥含水的粉末,和cement-Pb团结了形式。当水泥的增加的数量与超过11的pH增加时,在团结上增加方法的效果减少,并且团结的形式比其它好一些。
简介:Companiesbearprimaryresponsibilityforlow-carboneconomy,thusrelevantlow-carbonpoliciesshouldbesetproperlytoguidethemandtoensuretheirlow-carbonproductioneffectively.Tosolvetheproblemsgeneratedduringlow-carbondevelopment,thisarticleverifiestheexistenceofthetransmissionpathandstrength.Thisverificationincludesmediatingvariablesofcompanies’willingnessandcapacitytoconductlow-carbonproduction,atransmissionmechanismthroughincentivepathandresourcesprotection,andquestionnairedataofagriculturalcompanies.Conclusionsshowthatthelowcarbonpolicieshaveobviouspositiveeffectsonwillingnessofcorporation;thebasicservice-orientedpolicyhasasignificantlypromotingeffectonlow-carbonproductioncapacity;andlow-carbonproductionperformanceispositivelyinfluencedbywillingnessaswellascapability.Aimingatabettertransmissionpath,somecorrespondingrecommendationshavebeenputforwardintheend.
简介:SincetheestablishmentofthenewChinese,familyplanningpolicyinourcountryhasexperiencedthedevelopmentcourseofwavetype.Wefoundthatchangesinfertilitypolicyalongwiththecontinuousadjustmentofsocialmechanism,fromthe1950smainlybyadministrativeplanandcontrolmode,graduallytothe1990smainlybyguide-serviceandsecuritymode.Thecurrentfertilitypolicy,leapthelimitationsofpureadministrativeorders,underthecareofsocialmechanism,softentheinstitutionalpowersingleimpliedinthewholesocialframework,throughthepowersystemofmultilevel,reconcilethegapbetweennationalpopulationawarenessandindividualreproductivebehavior,providetheharmoniousstrengthforpopulationdevelopment.
简介:摘要为了提高全院护理人员对紧急意外情况的反应及处理能力,加强科室内及科室之间医护人员的协调配合,确保病人安全。同时,进一步加强护理安全管理,落实重点环节应急管理制度和措施,我院护理部参照临床护理应急预案及处理程序,结合科室的实际情况定期组织进行情景模拟应急演练,通过培训及应急演练,全院护士的现场急救技能和综合素质明显提高,现将体会报告如下