简介：Tocleantheexhaustemissionsasoneofthemostimportanttasksinpollutioncontrol,astudyonthetreatmentofengineemissionswithdischargeassistancewasreported.ADBDplasmasourceshapedingridandcylinderwasexaminedindifferentengineoperationalmodestoreducetheNO_xcontentofdieselengineexhaust.Thecompositionoftheexhaustgasesandchemicalreactionsinitiatedbythedischargewereanalyzed.Thedischargeh'equencyhadacrucialimpactonthedevice'sperformanceandgastreatment.Thevoltagesappliedtothedischargegapcouldalterthechemicalreactionsoccurringinthetreatedgases,whichwereindicatedbytheNOtoNO_2ratio.Theoperationofthesystemwasstudiedatfrequenciesrangingfrom400Hzto16kHz.

简介：Aboywhowascleaningshoesinthestreetsaidtoayoungmanpassingby,“Letmecleanyourshoes.”Theyoungmansaid,“No,thankyou.”“Youmaypaymeonlyonepound,sir,”saidtheboy.Buttheyoungmanrefused(拒绝)again.

简介：Atypeofself-cleaningpre-coatedsteelsheetwithexcellentself-cleaningperformancewasdevelopedusinghydrophilicsurfacetreatmenttechnology.Tounderstandtheself-cleaningpropertiesofthispre-coatedsteelsheetinanindustrialenvironment,theJiangjinnaturalenvironmentalteststationwaschosenastheoutdoorexposuretesttobeconducted,andtheself-cleaningperformanceofthesteelsheetwasstudiedbymeasuringthewatercontactangle,stainresistancefactor,colordifference,andglossofthesteelsheetduringtheoutdoorexposuretest.Thewatercontactangleoftheself-cleaningsteelsheetquicklydecreasedfrom84°to29°duringtheoutdoorexposuretest,andthesteelsheetshowedexcellenthydrophilicproperties,whichwerebeneficialtothespreadofraindropsanddetrimentaltotheaccumulationofthesurfacepollutants.Afteranoutdoorexposureof12months,theself-cleaningsteelsheethadahigherstainresistanceandcleanersurfacethanthecomparisonsamplesheet,demonstratingitsexcellentself-cleaningproperties.Moreover,thecolordifferenceandglossrateoftheself-cleaningsteelsheetweresimilartothoseofthepre-coatedsteelsheetwithouthydrophilicsurfacetreatment.Therefore,thehydrophilicsurfacetreatmenttechnologyusedinthisstudydidnotaffecttheanti-agingpropertyoftheself-cleaningsteelsheet.

简介：Twodifferentpulsecleaningtechniquesforultra-highcontrastlasersystemsarecomparablyanalysedinthiswork.Thefirstpulsecleaningtechniqueisbasedonnoncollinearfemtosecondoptical-parametricamplification(NOPA)andsecond-harmonicgeneration(SHG)processes.Theotherisbasedoncross-polarizedwave(XPW)generation.Withadoublechirpedpulseamplifier(double-CPA)scheme,althoughtemporalcontrastenhancementinahigh-intensityfemtosecondTi:sapphirechirpedpulseamplification(CPA)lasersystemcanbeachievedbasedonbothofthetechniques,thetwodifferentpulsecleaningtechniquesstillhavetheirownadvantagesandaresuitablefordifferentcontrastenhancementrequirementsofdifferentlasersystems.

简介：Theresearchonunderwatership-hullcleaningrobotwasconductedonthepurposeofrealizingtheautomationofcleaningunderwatershiphullsothatservicelifeofshipwillbeprolongedandshipspeedwillraised.Moreover,fuelconsumptionandtheworkintensityofdiverswillbereduced.Inthispaper,thecurrentsituationandthelatesttechnologyinChinaandabroadwereanalyzed;meanwhile,thetypicalcharacteristicsoftheunderwatercleaningrobotwereintroduced.Accordingtotheworkprincipleoftheunderwatercleaningrobot,theemphasiswasputontheanalysisandstudyofpermanent-magneticabsorption,magneticwheel,airproofandanticorrosion,underwatercleaningequipmentandcontrolsystem.Therobotiseasyinrotationandsimpleincontrol.

简介：Networktrafficclassificationaimsatidentifyingtheapplicationtypesofnetworkpackets.ItisimportantforInternetserviceproviders(ISPs)tomanagebandwidthresourcesandensurethequalityofservicefordifferentnetworkapplications.However,mostclassificationtechniquesusingmachinelearningonlyfocusonhighflowaccuracyandignorebyteaccuracy.TheclassifierwouldobtainlowclassificationperformanceforelephantflowsastheimbalancebetweenelephantflowsandmiceflowsonInternet.Theelephantflows,however,consumemuchmorebandwidththanmiceflows.Whentheclassifierisdeployedfortrafficpolicing,thenetworkmanagementsystemcannotpenalizeelephantflowsandavoidnetworkcongestioneffectively.Thisarticleexploresthefactorsrelatedtolowbyteaccuracy,andsecondly,itpresentsanewtrafficclassificationmethodtoimprovebyteaccuracyattheaidofdatacleaning.Experimentsarecarriedoutonthreegroupsofreal-worldtrafficdatasets,andthemethodiscomparedwithexistingworkontheperformanceofimprovingbyteaccuracy.Experimentshowsthatbyteaccuracyincreasedbyabout22.31%onaverage.Themethodoutperformstheexistingoneinmostcases.

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简介：Tocleanoutthesmearlayeronteethsurface,andprotecttheteethmedulla,theexperimentappliedthestudyobservingthecleanupofsixgroupsofsurfacesmearlayerofdentalcariesandthetubuleplugsreservingeffectafterusingofdifferentcavitycleanserswiththehelpofSEM.Theresultimpliedthatboththeacidicpreparationsandchelatorcouldcleanoutthesmearlayeron.teethsurfaceinsomeway,butthelateronecouldalsoreservepartialtubuleplugs,whichreducethestimulationtotheteethmedulla.Sothechelatorisbettercleansersinclinicaluse.

简介：由于平时不良的生活习惯，如长期习惯坐着不动、不均衡的饮食，再加上时不时在短时间内吃喝无度、作息混乱，导致身体吃了太多的不健康食品，而无法正常新陈代谢。新年新气象，让你从紧张和压力中释放出来，来吧．给身体进行一次排毒扫除，度过寒冷季节，在来年绽放光彩，调整好自己的状态，来迎接更有挑战性的工作。

简介：TheICRF(IonCyclotronRangeFrequency)cleaningtechniquehasbeenusedasaroutinewallcleaningmethodintheHT-7superconductingtokamak.Inawiderangeoftoroidalfield,thcremovalrateofresidualgasbyICRFcleaningwasabouttwentytimeshigherthanthatofglowdischargecleaning(GDC).AtdifferentgaspressureandRFpowerlevels,theICRFcleaningisstudiedcarcfully.Agoodimpurityclcaningeffectandaveryhighhydrogenremovalratewereobtained.Theremovalrateofhydrogenby5kWICRFcleaningachievedwas1.6×10-5Torr.1/s.AndtherelationshipsamongpressureP,outgassingrateQ,atomiclayersLabsorbedonsurfaceandthecleaningmodewerediscussedbriefly.

简介：Fieldemissionoccurredinsuperconductingradio-frequency(SRF)cavitiesisthemajorobstacleoftheacceleratorsoperatingathighgradient,whichpartlycausedbytheinnersurfacecontamination,suchasthehydrocarbonsandtheabsorbedresidualgas.Theplasmaprocessingcanbeaneffectivemethodtosolvethefieldemissionissues.Thepropertiesoflowtemperatureglowdischarge,whichwasargonplasmawiththechemicallyreactiveoxygen,wereinvestigatedfortheSRFcavitiesusedforCADSproject.

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简介：Inordertodecreasetheconsumptionofreagentsandsiliconduringremovalofsurfacecontaminationbeforesilicontexturinginsolarcellmanufacturingindustry,anewlow-costsurfacetreatmentapproachofelectrochemicalcleaningtechnique(ECT)isreported.Inthistechnique,apowerfuloxidizingelectrolytewasobtainedfromtheelectrochemicalreactiononBoron-dopedDiamond(BDD)electrodes,andappliedduringremovalofsurfacecontaminationsonsiliconwafersurfaces.Theslightlypolishedmonocrystallinesiliconsurfacesaftercleaningwerecomparedwiththeonesofprimalsiliconwafers.ThemeasurementresultsshowthatECTisquiteefficientinremovingNaClandorganiccontaminants.Aftercleaning,thecontrasttestwasconductedforthetexturedsiliconwaferswith/withoutpre-treatment(polish)separately.Theresultsshowthatthesizeofpyramidsonthesurfacewithouttraditionalpolishingprocessishomogeneousandsmallerthan4μm,andtheaveragesurfacereflectanceismuchlowerinthewavelengthrangefrom400nmto800nm.Therefore,thenewtechniquecansavesiliconmaterial,andeffectivelyavoidopticallossesforimprovingphotoconversioneffectofsolarcells.

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简介：Sulphonatednano-structuredmicro-porousionexchangepolymers,knownassulphonatedPolyHIPEPolymers(s-PHPs)wereusedinsyngascleaningtoinvestigatetheirimpactontarcomposition,concentrationanddewpointdepressionduringthegasificationoffuelcanebagasseasamodelbiomass.Theresultsshowedthatthes-PHPsusedasasecondarysyngastreatmentsystem,washighlyeffectiveatadsorbingandreducingtheconcentrationofallclassoftarsinsyngasby95%-80%whichresultedintardewpointdepressionfrom90℃to73℃.Itwasshownthattarsunderwentchemicalreactionswithins-PHPs,indicatingthattardiffusionfromsyngaswasdrivenbychemicalpotential.Itwasalsoobservedthats-PHPsalsocapturedashformingelementsfromsyngas.Theuseofs-PHPsingasificationaswellasinanintegratedthermochemicalbiorefinerytechnologyisdiscussedsincethetarloadeds-PHPscanbeusedasnaturalherbicidesintheformofsoiladditivestoenhancethebiomassgrowthandcropyield.

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