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500 个结果
  • 简介:Alowpoweratmosphericpressureplasmajetdrivenbya24kHzACpowersourceandoperatedwithaCH4/airgasmixturehasbeeninvestigatedbyopticalemissionspectrometer.Theplasmaparametersincludingtheelectronexcitationtemperature,vibrationaltemperatureandrotationaltemperatureoftheplasmajetatdifferentdischargepowersarediagnosedbasedontheassumptionthatthekineticenergyofthespeciesobeystheBoltzmanndistribution.TheelectrondensityatdifferentpowerisalsoinvestigatedbyHβStarkbroadening.Theresultsshowthattheplasmasourceworksundernon-equilibriumconditions.Itisalsofoundthatthevibrationaltemperatureandrotationaltemperatureincreasewithdischargepower,whereastheelectronexcitationtemperatureseemstohaveadownwardtrend.Theelectrondensityincreasesfrom0.8×1021m-3to1.1×1021m-3whenthedischargepowerincreasesfrom53Wto94W.

  • 标签: 等离子体射流 CH4 低功耗 常压 空气 激发温度
  • 简介:Theconstitutiveequationunderthelow-cyclefatigue(LCF)wasdiscussed,andatwo-dimensional(2-D)modelforsimulatingfatiguecrackextensionwasputforwardinordertoproposeanewcyclicJ-integral.Thedefinition,primarycharacteristics,physicalinterpretationsandnumericalevaluationofthenewparameterwereinvestigatedindetail.Moreover,thenewcyclicJ-integralforLCFbehaviorswasvalidatedbythecompacttension(CT)specimens.ResultsshowthatthecalculatedvaluesofthenewparametercancorrelatewellwithLCFcrackgrowthrate,duringconstant-amplitudeloading.Inaddition,thephenomenonoffatigueretardationwasexplainedthroughtheviewpointofenergybasedontheconceptofthenewparameter.

  • 标签: 循环J积分 疲劳裂纹 低周期疲劳 构成方程 数字评估
  • 简介:我们包括double-phonon-resonance报导分布式的反馈量串联激光(DFBQCL)的放射激光的性质活跃区域,在大约8.4亩m的波长。国外获得光谱由于在注射者在活跃区域和层次在更低的激光水平之间联合被产生,并且被其宽度是在1.5次阀值水流的0.5亩m的相应Fabry-PerotQCL的放射激光的光谱表明。作为结果,采用不同栅栏时期的DFBQCL在各种各样的热水池温度在房间温度和0.28亩m的全部的波长范围展出0.18亩m的波长跨度。当激光在搏动的模式在房间温度操作,大约30dB和1.78kA/cm(2)的低阀值水流密度的Ahigh方面模式抑制比率被完成。

  • 标签: 低阈值 量子 反馈机制 激光器 发射 波长
  • 简介:氢导致了裂开(HIC)有三不同微观结构,小粒的bainite与板条bainite的高力量管道钢的行为(GB?+?磅),小粒的bainite与针状的铁酸盐(GB?+?AF),并且伪多角形的铁酸盐(QF),被基于标准NACETM0284使用腐蚀实验学习。HIC实验在氢硫化物被进行(H2S)浸透的答案。试验性的结果证明有GB的钢?+?AF和QF微观结构介绍优秀腐蚀抵抗给HIC,而在磅的bainite板条和马氏体/奥氏体的阶段?+?GB微观结构为差的腐蚀抵抗负责。与铁酸盐阶段相比,bainite微观结构展出更高的力量和HIC的裂缝危险性。AF?+?GB微观结构被相信在设计的钢之中有机械性质和电阻的最好的联合到HIC。

  • 标签: 微观结构 管道钢 行为 低合金 腐蚀实验
  • 简介:Theproductionindexesweredeterioratedduetoqualitycoke,UtilizationFactor2.0t/m3·d,PCI100kg/T,AccordingtoAnalysistheMechanismofProductionoflowhotstrengthcokequalityonBlastFurnaceSmooth,ThecokecoldstrengthretainedM10<6.3overalongperiodoftimeinordertoinsurecokegranularityandpermeabilityindexincohesivezone;Aad<12andgranularitytranquilizationisusefulBFproduction.ThePCIprotectcokehotstrengthbyhighratebituminouscoals;highrateH2inBFgasbatecokedemolish.blastfurnaceoperation,onmonitoringandoperationBF,tranquilizationtheBLASTFURNACEtemperature,PTcontrolsparameterareaisabout1500℃;strengthenmanagementofpermeabilityindex,improveTop-pressureforBlastFurnace,StrengtheningtheManagementoftheRawMaterialsandFuel,logicalrateofsinterLeveloffabout70%toimproveMetallurgicalPropertiesofBurdens.ParametersofwindhavebeenadoptedAbout10000-11000kg·m/s;,theoreticalflametemperatureinablastfurnacehavebeenadjustedareaisabout2050-2200℃;thetemperaturedirectionaboutcopperstavemanagementestablishedact;accordingtothismeasures,AccordingtoImprovementCenterGasFlowInstabilityinthefirstplace,thegasflowdistributionturnstothereasonablestate.Strengthenfurnacecasthouseoperationect,UtilizationFactorimprove2.2t/m3·d,PCI130kg/T.ColdandhotstatestrengthindexesofcokeonBFproductionwereinstability.AccordingtooptimizetheOperatingParameteinspecificallyeconomytechnologyindexesconduction,theBFcondictioncankeepingsteadyandsmooth.

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  • 简介:单人赛水晶的ZnOnanorods被一个simplesolvothermal过程在低温度综合了。传播电子显微镜学(TEM)观察证实了同样综合的产品有像杆的形态学,直径从100nm从几纳米到30nm和长度到六角形的ZnOnanorods是的2亩m.Such在结构上制服和生长方向被识别是[0001]ZnOnanorods的.Growth机制被建议。

  • 标签: 电子显微镜 氧化锌 晶体 低温
  • 简介:A0.06%Clowcarbonsteelwasdeformedintorsionoverthetemperaturerange877-917℃ina2%H2-Argasatmosphere.Strainsof0.25-5.0wereappliedatstrainratesofε=0.04s-1andε=0.4s-1tostudytheformationofferritebydynamictransformation(DT)attemperaturesabovetheAe3.ThecriticalstrainforferriteformationbyDTwasaboutε=0.2anditsvolumefractionincreasedwithstrainanddecreasedwithtemperatureabovetheAe3.Averageferritegrainsizesof1.5μmto5μmwereproduced,whichdecreasedwithstrainrate.Atthelowerstrainrate(ε=0.04s-1)reversetransformation(RT)tookplaceduringdeformationonceanincubationtimeofabout40s,wasexceeded.Anincreaseinstrainratefromε=0.04s-1toε=0.4s-1arrestedRTduringtestingatalltemperaturesasthetotaltesttimesdidnotexceed13s.ThepresentworkshowsthatDTisfavoredathigherstrainratesbyincreasingthedrivingforce(i.e.storedenergy)andbysuppressingRT.

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  • 简介:TheArcticsea-iceextenthasshownadecliningtrendoverthepast30years.Icecoveragereachedhistoricminimain2007andagainin2012.Thistrendhasrecentlybeenassessedtobeuniqueoveratleastthelast1450years.Inthesummerof2010,averylowsea-iceconcentration(SIC)appearedathighArcticlatitudes--evenlowerthanthatofsurroundingpackiceatlowerlatitudes.Thisstrikinglowiceconcentration--referredtohereasarecordlowiceconcentrationinthecentralArctic(CARLIC)--isuniqueinouranalysisperiodof2003-15,andhasnotbeenpreviouslyreportedintheliterature.TheCARLICwasnottheresultoficemelt,becauseseaicewasstillquitethickbasedonin-situicethicknessmeasurements.Instead,divergenticedriftappearstohavebeenresponsiblefortheCARLIC.AhighcorrelationbetweenSICandwindstresscurlsuggeststhattheseaicedriftduringthesummerof2010respondedstronglytotheregionalwindforcing.ThedrifttrajectoriesoficebuoysexhibitedatranspolardriftintheAtlanticsectorandaneastwarddriftinthePacificsector,whichappearedtobenefittheCARLICin2010.Undertheseconditions,moresolarenergycanpenetrateintotheopenwater,increasingmeltthroughincreasedheatfluxtotheocean.Wespeculatethatthisdivergenceofseaicecouldoccurmoreofteninthecomingdecades,andimpactonhemisphericSICandfeedbacktotheclimate.

  • 标签: sea ICE concentration CENTRAL Arctic Beaufort
  • 简介:摘要Low-E镀膜技术通过在玻璃的表面生成低辐射的薄膜,可有效降低玻璃表面的辐射传热,本文对Low-E镀膜技术的特性进行了罗列与阐述,分析归纳了我国现阶Low-E镀膜技镀膜在节能中的应用进行了场景分析与展望。

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  • 简介:Haze-to-fogtransformationduringalonglasting,lowvisibilityepisodewasexaminedusingtheobservationsfromacomprehensivefieldcampaignconductedinNanjing,Chinaduring4-9December2013.Inthisepisode,hazewastransformedintofogandthefoglastedfordozensofhours.Theimpactsofmeteorologicalfactorssuchaswind,temperature(T)andrelativehumidity(RH)onhaze,transitionandfogduringthisepisodewereinvestigated.Resultsrevealedsignificantdifferencesbetweenhazeandfogdays,duetotheirdifferentformationmechanisms.Comparisonwasmadeforboundary-layerconditionsduringhazydays,haze-to-fogdaysandfoggydays.DistributionsofwindspeedandwinddirectionaswellassynopticweatherconditionsaroundNanjinghaddeterminativeimpactsontheoccurrencesandcharacteristicsofhazeandfog.WeakenedsoutherlywindinsouthernNanjingresultedinhighconcentrationofpollutants,andhazeeventsoccurredfrequentlyduringthestudyperiod.Thewindspeedwaslessthan1ms-1inthehazeevent,whichresultedinastableatmosphericconditionandweakdispersionofthepollutants.Theheightofthetemperatureinversionwasabout400mduringtheperiod.Theinversionintensitywasweakandthetemperature-differencewas4℃km-1orlessinhaze,whiletheinversionwasstronger,andtemperature-differencewasabout6℃km-1,approachingtheinversionlayerintensityinthefogevent.HazeeventisstronglyinfluencedbyambientRH.RHvaluesincreased,whichresultedinhazedaysevidentlyincreased,suggestingthatanincreasingfractionofhazeeventsbecausedbyhygroscopicgrowthofaerosols,ratherthansimplybyhighaerosolloading.WhenRHwasabove90%,hazeaerosolsstartedtobetransformedfromhazetofog.Thisstudycallsformoreeffortstocontrolemissionstopreventhazeeventsintheregion.

  • 标签: HAZE FOG TRANSFORMATION METEOROLOGICAL elements
  • 简介:AnindexingmethodforrapidevaluationoftheseismicvulnerabilityofinfilledRCframebuildingsinJordanisproposed.Themethodaimsatidentifyinglowandmediumriseresidentialbuildingsassafeorinneedoffurtherdetailedevaluation.Followingarapidvisualscreening,thebuildingisassignedaBasicCapacityIndex(BCI);fiveperformancemodifiersareidentifiedandmultipliedbytheBCItoarriveattheCapacityIndex(CI)ofthebuilding.ACapacityIndexlowerthanalimitCIvalueindicatesthatthescreenedbuildingcouldexperiencemoderateearthquakedamagewhereasahighervalueimpliesthatminordamage,ifany,wouldtakeplace.Toestablishthebasicevaluationparameters;fortyRCframebuildingswereselected,designedandanalyzedusingstaticnonlinearanalysisandincorporatingtheeffectofinfillwalls.Effectsofseismicity,localsiteconditions,horizontalirregularities(setbacksandre-entrantcorners),verticalirregularities(softstoryatgroundfloorlevel)andoverhangsontheseismicperformanceoflocalbuildingswereexamined.Assessmentformsweredesignedandusedtoevaluateandrank112samplebuildings.About40%ofthesurveyedbuildingswerefoundtobeinneedofdetailedevaluationtobetterdefinetheirseismicvulnerabilities.

  • 标签: SEISMIC VULNERABILITY RAPID assessment capacity in
  • 简介:变换波浪有慢速度和低signal-to-noise比率。它对第一裂缝的精选和箱也困难common-conversion-points(CCP)。一些静电干扰方法,为P波浪数据工作很好,不能有效地被使用解决变换波浪的静电干扰问题。这在变换波浪的数据处理成为了主要障碍到突破。改进变换波浪的静态的修正,首先基于common-receiver-point(CRP),栈被用于起始的接收装置静电干扰修正提高CRP栈的连贯的一个静电干扰方法。第二,改进CCP栈的连续性的stack-power-maximization静电干扰修正被用于详细接收装置静电干扰。最后,一个non-surface-consistent剩余行动外面CCP集合的修正被用来从不同深度提高思考信号的栈力量。变换波浪的静电干扰被三个修正方法的联合使用解决。

  • 标签: 转换波 静力学 地震数据 检测方法
  • 简介:Companiesbearprimaryresponsibilityforlow-carboneconomy,thusrelevantlow-carbonpoliciesshouldbesetproperlytoguidethemandtoensuretheirlow-carbonproductioneffectively.Tosolvetheproblemsgeneratedduringlow-carbondevelopment,thisarticleverifiestheexistenceofthetransmissionpathandstrength.Thisverificationincludesmediatingvariablesofcompanies’willingnessandcapacitytoconductlow-carbonproduction,atransmissionmechanismthroughincentivepathandresourcesprotection,andquestionnairedataofagriculturalcompanies.Conclusionsshowthatthelowcarbonpolicieshaveobviouspositiveeffectsonwillingnessofcorporation;thebasicservice-orientedpolicyhasasignificantlypromotingeffectonlow-carbonproductioncapacity;andlow-carbonproductionperformanceispositivelyinfluencedbywillingnessaswellascapability.Aimingatabettertransmissionpath,somecorrespondingrecommendationshavebeenputforwardintheend.

  • 标签: low-carbon policy WILLINGNESS of COMPANIES to
  • 简介:Ionimplantationmayfavorablymodifythepropertiesofpolyaniline/Siheterojunctionsolarcellsfabricatedbytheelectrochemicalmethod.Influencesoftheimplantationontheabsorptionspectrumandthethermalstabilitywerediscussedandoutputpropertiesweremeasured.Theresultsshowthattheabsorptionspectrumofthepolyanilinefilmsmodifiedbyionimplantationismuchwider;itspyrolytictemperatureincreasesby40℃,andthepolyaniline/Sicellefficiencyincreases18and3timesundertheilluminationof10.92and37.2W/m2,respectively.

  • 标签: 离子注入 异质结太阳电池 SI 性能
  • 简介:目的:调查加拿大针灸从业人员对针灸治疗急性腰痛的有效性及相关费用的认识,从而确定针灸在急性腰痛治疗中的应用情况。方法:于1996年9月对安大咯加拿大针灸基金会的285名会员发放问卷,只对内科医生及理疗医生的反馈问卷进行统计分析。结果:281名符合条件的会员,197名完成了问卷(回收率70.1%),45.0%为内科医生,55.0%为理疗医生。其中87.0%的人过去使用过针灸疗法治疗急性腰痛,66.O%的人调查时正在使用,87.0%的人表示将来会继续使用。87.0%的反馈者认为针灸治疗急性腰痛是有效的,60.0%的人认为针灸疗法可以阻止急性腰痛的发展。针灸平均每次费用为$28,必需的平均治疗次数为5.7次。结论:多数反馈者对针灸治疗急性腰痛持肯定态度,他们在临床上也经常使用针灸疗法治疗此病。绝大多数反馈者认为针灸治疗急性腰痛是有效的。此外,超过一半的反馈者相信针灸可以阻止急性腰痛的病情发展。虽然本研究调查的针灸从业者坚信针灸治疗急性腰痛是有效的,但需要高质量的大样本调查予以验证。

  • 标签: 腰痛 针刺疗法 问卷
  • 简介:Nowadayslow-carbondevelopmenthasbecomeahotissueofthewholeworld.Thisarticlefirstintroducesthebackgroundoflow-carboneconomy,andthenexplainstheimportanceofretailingcompaniesinsocialeconomyandthereasonswhytheyshouldoperateinlow-carbonmode.Morespecifically,low-carbonoperationcannotonlyimprovethecompetitivenessofaretailingcompanybyreducingoperationcostandformattinggoodcorporateimage,butalsobenefitthewholesocietybyreducingenvironmentpollutionandpromotinglow-carbonconsumptionandproduction.Onlybyadoptinglow-carbonoperationpatterncanretailingcompaniesconfrontthefierceinternationalcompetition.Toillustratetheabovepointofview,severalcasesoffamouswesternretailingcompanieswillbeanalyzedinthisessay.Tesco,Wal-MartandCarrefourarealltypicalexamplesinlow-carbonoperationbecausetheyallhavegreatgreenandsustainabilityinitiatives.Basedontheadvancedexperiencesoftheabove-mentionedcompanies,thisessaydiscussesthelow-carbonoperationways,puttingforwardsomevaluablesuggestionsonthisproblem.Fromatechnicalperspective,retailingcompaniesshouldadoptadvancedtechnologiesrelatingtolow-carbonoperation.Ontheotherhand,managementlevelofretailingcompaniesshouldbeenhancedtoensuretheapplicationeffectoflow-carbontechnologies.Retailingcompaniesshouldimprovetheabilityofinternalmanagementtoexcavatetheinternalpotentialandbuildgreensupplychaintocorporatewithstrategicpartners.Finally,thisarticlegivestheconclusionofthewholeanalysis.

  • 标签: low-carbon ECONOMY low-carbon operation retailing COMPANY
  • 简介:[1]Ci,S.,Sharif,H.,2002.AVariableDataRateSchemetoEnhanceThroughputPerformanceofWirelessLANs.IEEECSNDSP.[2]Doufexi,A.,Armour,S.,Butler,M.,Nix,A.,Bull,D.,2001.AstudyoftheperformanceofHiperlan/2andIEEE802.11aphysicallayers.IEEEVTC,1:668-672.[doi:10.1109/VETECS.2001.944927][3]Doufexi,A.,Armour,S.,Karlsson,P.,Butler,M.,Nix,A.,Bull,D.,2002.AcomparisonoftheHiperlan/2andIEEE802.11aWirelessLANstandards.IEEECommunicationsMagazine,40(5):172-180.[doi:10.1109/35.1000232][4]Ferré,P.,Doufexi,A.,Chung-How,J.,Nix,A.,Bull,D.,2003.LinkAdaptationforVideoTransmissionoverCOFDMBasedWLANs.IEEESCVT.Eindhoven.[5]Girod,B.,Kalman,M.,Liang,Y.,Zhang,R.,2002.Advancesinchannel-adaptivevideostreaming.JournalofWirelessCommunicationsandMobileComputing,2(6):573-584.[doi:10.1002/wcm.87][6]Haratcherev,I.,Langendoen,K.,2004.HybridRateControlforIEEE802.11.ACMInternationalWorkshoponMobilityManagementandWirelessAccess(MobiWac),Philadelphia.[7]Haratcherev,I.,Langendoen,K.,Lagendijk,I.,Sips,H.,2002.D3.16:Application-directedAutomatic802.11RateControl.GigaMobileProject,TUDelf,Tech.Rep.[8]Haratcherev,I.,Langendoen,K.,Lagendijk,R.,Sips,H.,2004.SNR-basedRateControlinWaveLAN.ASCI2004Conference.PortZelande.[9]Haratcherev,I.,Taal,J.,Langendoen,K.,Lagendijk,R.,Sips,H.,2005.AutomaticIEEE802.11ratecontrolforstreamingapplications.WirelessCommunicationsandMobileComputing,5(4):421-437.[doi:10.1002/wcm.301][10]Hoffman,C.,Manshaie,M.H.,Turletti,T.,2005.CLARA:Closed-LoopAdaptiveRateAllocationforIEEE802.11WirelessLANs.IEEEWirelessCom'.Hawaii.[11]Holland,G.,Vaidya,N.,Bahl,P.,2001.ARate-AdaptiveMACProtocolforMulti-HopWirelessNetworks.Mobicom.Rome.[12]H264software,2005.H.264/AVCSoftwareCoordination.http://bs.hhi.de/~suehring/tml/.[13]IEEE802.11,1999.Part11:WirelessLANMediumAccessControl(MAC)andPhysicalLayer(PHY)Specifications.[14]IEEE802.11a,1999.Part11:WirelessLANMediumAccessControl(MAC)andPhysicalLayer(PHY)Specific

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  • 简介:沉积负担在河的词法进化起一个主要作用。因此,和水力的结构的沉积负担相互作用的分析具有主要重要性以便提高鱼产地和河的保藏词法特征。现在的学习处于实时的床条件一个块斜面下游地分析scour机制,当来临的流动供应的沉积被从scour洞搬运的沉积平衡时。实验在scour几何学上在模型斜槽和来临的沉积集中的效果被执行被分析。scour特征深深地取决于来临的沉积集中,这被观察,四种主要侧面配置被区分。试验性的数据被分析,实验关系被形成以便为不同水力、几何的条件从斜面脚趾评估一个scour洞,沙丘高度和最大的沙丘高度的横过的节的距离的深度和长度。一个scour洞的动态平衡形状不取决于沉积负担时间历史,这也被证明。

  • 标签: 冲刷坑 文件配置 实验数据 几何条件 水工建筑物 形态演变