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简介：AnexperimentalsystemofACarcdischargeinwaterwasdesignedwithpole-poleelectrodesandapeakvoltageof1500Vandatestcircuitwassetupusingvirtualinstrumenttechnology.ThemechanismofanACplasmaarcgeneratedinwaterwasanalyzed.ThevoltagecurrentcharacteristicoftheACplasmaarcwasobtainedfromthewaveform.Thetemperaturecharacteristicwastestedwithaspectrumdiagnosissystem,andtheeffectofdifferentelectrodematerialsonthestrikingvoltageandpeakcurrentwasanalyzed.Theresultsshowthatwhenapowersupplyof6kWisappliedonelectrodeswithagapof2mminwater,thestrikingvoltageisfrom900Vto1300V,thearcvoltageisfrom40Vto100V,thearccurrentisfrom2Ato7A,andthezerorestperiodisfrom1msto2ms.Inaddition,thearcvoltageandcurrentaredifferentforelectrodesinaluminum,copperandstainlesssteel.Thearcvoltageislowerandthecurrentishigherforanaluminumelectrodethanthoseforcopperandstainlesssteelones.Thehighesttemperatureofthearcis7643K.

简介：Acomparativestudyoftheneedle-to-liquidplasmainthecontinuousmodewithDCandACexcitationsisdetailedinthispaper.Allplasmasstudiedhereareshowntobeglowdischarges.Thisstudyisbasedonmeasurementsofseveralkeyparameters,includingelectricalenergy,opticalemissionintensitiesofactivespecies,rotationalandvibrationaltemperatures,andtemperaturesoftheneedleandliquidelectrodes.ACplasmascanproduce1.2～5timeshigherexcitedstateactivespeciesthanDCplasmasunderthesamedissipatedpower.ACexcitedliquidplasmashavethehighestenergyutilizationefficiencyamongthethreesystems(ACexcitedplasmas,DCexcitedplasmaswithwateranodeandDCexcitedplasmaswithwatercathode);mostoftheenergyisusedtoproduceusefulspeciesratherthantoheattheelectrodesandplasmas.

简介：AdesignofthemainAC/DCconvertersystemforITERisdescribedandthecon-figurationofthemainAC/DCconvertersispresented.Toreducethereactivepowerabsorbedfromtheconverterunits,themainAC/DCconvertersaredesignedtobeseries-connectedandworkinasequentialmode.Thestructureoftheregulatoroftheconvertersystemisdescribed.AsimulationmodelwasbuiltupforthePSCAD/EMTDCcode,andthedesignwasvalidatedaccordingly.Harmonicanalysisandreactivepowercalculationoftheconvertersunitsarepresented.Theresultsrevealtheadvantageofsequentialcontrolinreducingreactivepowerandharmonics.

简介：ThispaperisdevotedtopredictAClossofcableinconduitconductor(CICC)whichisofimportanceinthedesignofconductors.Theconsiderationfortheconductor'sdesignandmainparametersforthemagnetsareintroduced.InordertoattainagoodaccuracyinthecalculationofAClosses,thefielddistributionwithinsuperconductingoutsertshouldbeconsidered.CalculationoftheAClosses,includinghysteresislossesandcouplinglosses,isconducted.Anemphasisisputonthehysteresislossduringtherampupofthecurrenttotheoperationalcurrent(15.3kA)andthecouplinglossoftheconductorinapower-downconditionforinsert.Theresultsareobtainedtobe74.9kJand950Jfor40Thybridmagnets,respectively.Basedonthecalculation,abriefanalysisoflosseseffectontheconductordesignandtheoperationofmagnetisgivenforthepurposethatthecapacityofthecryogenertorcanbeevaluatedandthestabilityregimecanbeimprovedinourfutureworkonthehybridmagnets.

简介：Theeffectsoflinearfallingrampresetpulserelatedtoaddressingoperationinanalternatingcurrentplasmadisplaypanel(ACPDP)werestudied.Thewallchargewaveformsweremeasuredbytheelectrodebalancemethodina12-inchcoplanarACPDP.Thewallchargewaveformsshowtherelationshipbetweenthesloperatioofthefallingrampresetpulseandthewallchargesattheendofthefallingrampresetpulsewhichinfluencestheaddressingstability.Thentheeffectsofthesloperatioofthelinearfallingrampresetpulseontheaddressingvoltageandaddressing,timewereinvestigated.Theexperimentalresultsshowthattheminimumaddressingvoltageincreaseswiththeincreaseofthesloperatioofthefallingrampresetpulse,andsodoestheminimumaddressingtime.Basedontheexperimentalresults,theoptimizationoftheaddressingtimeandthesloperatioofthefallingramppulseisdiscussed.

简介：Inresponsetothecurrentimbalancephenomenonanditsharmfulness,acurrentsharingcircuitmodelisbuiltup,whichrevealstheunderlyingcausesforthecurrentimbalancethroughaquantitativeanalysis.Then,afeasibleapproachofimprovement,namelyenlargementofthelengthofconnectionbusbars,isproposed.Aftertheamendment,itcanbeseenthatthecurrentsharingcoefficientisalmostunityunderratedorfaultcurrentconditions.

简介：本文采用XRD，EXAFS等手段考察Co载量对催化剂结构的影响，并关联其合成醇活性。活性炭担载的硫化态Co-Mo-K样品中，Mo主要以MoS2物种形式存在于活性炭的表面上，而Co在低Co载量时主要形成“Co-Mo-S”相，在高Co负载量时会有部分类Co9S8的物相出现。经Co助剂修饰后的催化剂显示出良好的合成醇催化性能，Co助剂有利于合成C2+醇。Co/Mo原子比为0．5时表面“Co-Mo-S”相可能达到饱和，合成醇的收率也最高。Co物种是和MoS2物相以协同的方式起作用的。

简介：首次将炭载型CuO/AC用于烟气脱硫，在最经济的烟气脱硫温度窗口（120－250℃）显示出高的脱硫活性，考查了煅烧温度和煅烧后脱硫剂的预氧化对硫脱活性的影响，并对脱硫剂进行了TPD和EXAFS表征。结果表明：经250℃煅烧的CuO/AC脱硫剂具有最高的脱硫活性。200℃煅烧，前驱体Cu(NO3）2未完全分解：高于250℃煅烧，活民生组分CuO被载体C部分还原为金属Cu微晶，从而发生烧结，聚集，以上均导致脱硫剂活性的下降，尽管不同温度煅烧的CuO/AC表现出大的脱硫活性差异，但吸硫后均生成同一反应产物CuSO4,250℃煅烧的CuO/AC脱硫剂Cu以CuO和Cu2O形态存在，其中的Cu2O在200℃很容易氧化成CuO。

简介：工业半焦经850℃水蒸气活化，浓硝酸处理，等体积浸渍硝酸铜溶液，干燥，煅烧制得新型低温CuO/AC脱硫剂，考查了脱硫剂制备参数－载铜量对脱硫活性的影响，并对不同载铜量的脱硫剂进行了TPR，EXAFS，XRD等表征，结果表明，载铜量为5－15％（w)时，脱硫剂具有较高的脱硫活性；5％的载Cu量为AC（活性焦）表面发生单层覆盖的最大量，低于5％，活性组份CuO在AC表面高度分散，无体相CuO出现，但脱硫剂过低的活性组份含量，使得脱硫活性较低；高于5％时，CuO在AC表面发生多层覆盖，且随着载铜量的继续增加，活性组份矣集和内部微孔堵塞严重，致使脱硫活性出现明显下降。