简介：Datingbackto1933,SCNU'sPhysicsdisciplinewasselectedforthenationalproject"World-ClassDisciplineDevelopment"bytheMinistryofEducationin2017.CurrentlytheSchoolacceptsanaverageof1800full-timeundergraduatesand500postgraduateresearchstudents,producingapproximately20000graduatessinceitsfoundation.

简介：TherootofPanaxginsengplantundergoesaspecificdevelopmentalprocesstobecomeabiosynthesisandaccumulationtissueforginsenosides.Toidentifyandanalyzegenesinvolvedinthebiosynthesisofginsenoside,weconstructedandcharacterizedafull-lengthcDNAlibraryfor6-year-oldNorthAmericanginseng.ThetiterofprimarycDNAlibraryis1.2×106pfu/mL,thetiterofamplifiedlibraryis2.6×1010pfu/mLandtherateofrecombinantisabove86%.Theinsertsizerangesfrom0.3to2.0kb.Sequencingresultsshowthat18of58genesarehighhomologoustothegenes(GBR5,GBR3andGBR1)knowninGenBank,whichareinvolvedinbiosynthesisofginsenosideinNorthAmericanginsengplant;16of58genesarenovelgenes.Thefull-lengthcDNAlibraryofNorthAmericanginsengroottissuesisessentialforthecloningofgenesknownanditisalsoaninitialkeyforthescreeningandcloningofnewgenes.

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简介：FortheAMANDAexperimentanewtypeofopticalmodule-thedigitalanalogopticalModule(dAOM)-hasbeendeveloped,Itincorporatessomelocal'intelligece'forslowcontrolandactiveelectronicsforanalogpulsetransmission.Morethan20dAOMprototypeshavebeensuccessfullydeployedintothepolariceduringthe1999/2000antarcticseasonandarerunningsincethattime.TheyareconnectedtothedAOMDAQboardsatthesurfacebysingletwistedparicablesoverdistancesupto2.7km.CORBAbasedclient-serverapplicationsestablishworld-wide,logicalaccesstoeverydAOM.

简介：Thetsunamiwasasuddenmarinedisasters.Tsunamiwavescanquicklyspreadtonear-shoreandcausethedisasterafterthetsunami.Soitisveryimportantoftimelymonitoringandearlywarningofthetsunami.Afterseveralunsuccessfultsunamiforecasting,theUnitedStatesdevelopedtsunamibuoyspecificallyfortheearlydetectionoftsunamiwaves.Tsunamibuoycannotonlybeabletodisplayoccurrenceofthetsunami,itisrealtimedatabutalsobeassimilatedintothetsunamiwarningsystem,toimprovetheaccuracyofthetsunamiforecasting.Severaltsunamieventsintherecentfewyearshaveproventheimportantroleofthetsunamibuoys.Subsequently,thetsunamiwarningsystembasedontsunamibuoyswasintoregularoperation.ThesystemaccuratelypredictedtheresultsonMarch11,2011Japantsunamievent.StateOceanicAdministration(SOA),Chinaalsodeployed2tsunamibuoysintheSouthChinaSea(SCS),whichalsoplayedanimportantroleinthewarningprocessofJapantsunamionMarch11,2011.NationalMarineEnvironmentalForecastingCenter/StateOceanicAdministration(NMEFC/SOA)willcollaboratewithPacificMarineEnvironmentalLaboratory/NationalOceanicandAtmosphericAdministration(PMEL/NOAA)todevelopassimilationmethodmakinguseofrealtimedataoftsunamibuoyandbuildaforecastingsysteminSCSinthefuture.

简介：TostudythespatialdifferenceofoceanambientnoiseinoffshoreChinaandrevealitsgenerationmechanism,thedifferencebetweenthenoiselevel(NL)oftwostationsiscomparedbasedonlong-termobservationdatacollectedinthesameseason.Consideringtheinfluenceofunderwateracousticchannelsandthecharacteristicsofnoisesources,thetransmissionlosslevel(TL)fromtheportshipnoisesourcestothemeasuringstationisanalyzedanditshowsastrongcorrelationbetweenthetransmissionlossdifference(TLD)andnoiseleveldifference(NLD)atthebandof50-500Hz.Atthesametime,theanalysisofshipnoisesourcelevel(SL)presentsadifferenceabout20dBbetweenthetwoports,correspondingtothevariationoftheshipdensitybeforeandduringthefishingmoratorium.Theresultsprovethattheambientnoiseiscloselyrelatedtoshipnoisesourcesatthisfrequencyband,andthenoisedifferencebetweenthetwostationsresultsfromthetransmissionlossandtheshipnoisesources.

简介：Byinvestigatingtheeffectsondeepoceanambientnoiseoftyphoon'KAI-TAK'whichpassedthenorthareaoftheSouthChinaSea,itisshownthatthewindspeed,therainfallintensityandthelongwaveswellcausedbytyphoonaffecttheoceanambientnoisesignificantly.Thecorrelationbetweentheoceanambientnoiseandthewindspeedduringthetyphoonismuchbetterthanthatinthenon-typhoonperiodinthesameBeaufortscale.Analysisofthecorrelationbetweenthe415hoceanambientnoisemeasureddataandwindspeedshowsthat,whenthefrequencyisgreaterthan300Hz,thecorrelationcoefficientbetweentheoceanambientnoiseandthewindspeedisgreaterthan0.5,achievingamoderatecorrelation;whenthefrequencyisgreaterthan630Hz,thecorrelationcoefficientisbetween0.8and0.9,achievingahighdegreeofcorrelation.Thecorrelationbetweentheoceanambientnoiseandthewindspeedisbetterthanthatbetweentheoceanambientnoiseandthesignificantwaveheightwhenthefrequencyisgreaterthan300Hz.Thecorrelationbetweentheoceanambientnoiseandthewindspeedininfrasonicbandfrom10Hzto20HzispoorintheSouthChinaSea,becausetheshippingisbusyinthisseaareaandtheoceanambientnoiseiscontaminatedbytheshipnoiseevenduringthetyphoon.

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