简介：Thechaoticcharacteristicsoftimeseriesoffivepartialdischarge(PD)patternsinoil-paperinsulationarestudied.TheresultsverifyobviouschaoticcharacteristicofthetimeseriesofdischargesignalsandthefactthatPDisachaoticprocess.Thesetimeserieshavedistinctivefeatures,andthechaoticattractorsobtainedfromtimeseriesdifferedgreatlyfromeachotherbyshapesinthephasespace,sotheycouldbeusedtoqualitativelyidentifythePDpatterns.Thephasespaceparametersareselected,thenthechaoticcharacteristicquantitiescanbeextracted.ThesequantitiescouldquantificationallycharacterizethePDpatterns.TheeffectsonpatternrecognitionofPRPDandCAPDarecomparedbyusingtheneuralnetworkofradialbasisfunction.Theresultsshowthatbothofthetworecognitionmethodsworkwellandhavetheirrespectiveadvantages.Then,boththestatisticaloperatorsunderPRPDmodeandthechaoticcharacteristicquantitiesunderCAPDmodeareselectedcomprehensivelyastheinputvectorsofneuralnetwork,andthePDpatternrecognitionaccuracyistherebygreatlyimproved.

简介：Thepedestalcharacteristicisanimportantbasisforhighconfinementmode(Hmode)research.BecauseofthefinitespatialresolutionofThomsonscattering(TS)diagnosticonExperimentalAdvancedSuperconductingTokamak(EAST),itisnecessarytocharacterizethepedestalwithasuitablefunctionalform.BasedonsimulatedandexperimentaldataofEAST,itisshownthatthetwo-linemethodwithabilinearfittinghasbetterreproducibilityofpedestalparametersthanhyperbolictangent(tanh)andmodifiedhyperbolictangent(mtanh)methods.ThismethodhasbeenappliedtoEASTtypeIedgelocalizedmode(ELM)discharges,andtheelectronpedestaldensityisfoundtobeproportionaltotheline-averageddensityandtheedgepressuregradientisfoundtobeproportionaltothepedestalpressure.Furthermore,theionpoloidalgyro-radiushasbeenidentifiedasthesuitableparametertodescribethepedestalpressurewidth.

简介：An8-channelHCNlaserinterferometerwillbeinstalledonHL-2Ainnearterm.InordertogetthespatialprofileoftheelectrondensityBarrnumericalmethodisadoptedtorealizetheAbelinversion.InthisarticletheresultoftheAbelinversionbyMatlabGUIisgivenwhichcanbeupdatedtoprocessthemeasureddataofthe8-channellaserinterferometerandprovidethespatialdistributionoftheelectrondensity.

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简介：Radiointerference(RI),asanaftereffectofcoronadischarge,isanimportantresearchtopicinthefieldofelectromagneticcompatibility,whereexcitationfunctionisappliedbroadlytothepredictionofRIlevel.ThispaperpresentsthetheoryofexcitationfunctionmethodusedintheRIlevelprediction.Then,somepracticalproblemsrelatedtothismethodarediscussed.Thepropagationprocedureofcoronacurrentissolvedbythephase-modaltransformation,andtheimpedancematrixofmultitransmissionlinesiscalculatedbyadoublelogarithmicapproximatemodelofCarson'sGround-Returnimpedance.Atthesametime,inordertocalculatetheRIlevelwhentotallinecoronaisassumed,ananalyticalformulaisdeducedforintegraloperation.Basedontheabovesolutions,analgorithmispresentedandappliedtothepredictionofRIlevelofapracticaloverheadtransmissionline.Comparisonofpredictionandmeasurementresultsindicatesthatthealgorithmproposedinthispaperiseffectiveandfeasible.

简介：Therecentresearchworkondomainstructuresandtheirdynamicsinfenoelasticandferroelectriccrystalsbywhite-beamsynchrotronradiationtopographyissummarized.Thereal-timeimaging,fine-beamLauediffraction,andanomalous-scatteringtopographywerecarriedouttothestudyofthedomainstructuresandphasetransitionintheferroelasticNdP5O14andLaP5O14,andferroelectricKTa1-xNbxO3,(Ba0.25Sr0.75)0.9(K0.5Na0.5)0.2Nb2O6,andKTiOPO4crystals.Somepreliminaryresultsarepresentedanddiscussed.

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简介：BipyridylrutheniumdyeN3andN719wassynthesized,purifiedbythegelchromatogrammethodandcharacterizedbytheprotonNMRandUV-Visspectra.Afterthepurificationmostoftheimpuritiesthatdecreasedthephotoelectrochemicalpropertieswereremovedandtheopen-circuitvoltage(V_(oc)),short-circuitphotocurrentdensity(J_(sc))andoverallphoto-electricconversionefficiency(η)ofthedye-sensitizedsolarcells(DSCs)increaseddramatically.Thestandardcurveofabsorbancevs.concentrationofN3andN719dyewasachievedbyusingUV-Visquantitativeanalyticspectrophotometry.ThismethodwasemployedtodeterminetheconcentrationofthedyesolutionaftercoatingofTiO_2films.Thelinearconcentrationrangeofabsorbancevs.concentrationofN719wasbetween6.25×10~(-6)mol·L~(-1)and1×10~(-4)mol·L~(-1)withthemolarextinctioncoefficient(ε)1.58×10~4L·mol~(-1)cm~(-1)atawavelengthof533～531nmand1.50×10~4L·mol~(-1)·cm~(-1)atawavelengthof393～384nm,accordingly.ThelinearconcentrationrangeoftheN3dyewas6.25×10~(-6)mol·L~(-1)to1.5×10~(-4)mol·L~(-1)withεof1.47×10~4L·mol~(-1)·cm~(-1)atawavelengthof538～535nmand1.48×10~4L·mol~(-1)·cm~(-1)atawavelengthof399～393nm.

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