简介:Besidesthesameperformanceastheearthquakeobservationsystempossessusedonthefixedearthquakestation,suchaswidedynamicrange,highresolution,followingspecialfeaturesarenecessaryfortheearthquakedataacquisitionsystem(EDAS)appliedformobileobservinginordertosuitforrunninginthefield:a)Reliability.TheEDASmustworkstablylongtimewithoutbeingcared.b)Adaptabilitytothefieldenvironments.Earthquakeobservinginthefieldoftenencountersawfulenvironments,suchasdampness,dust,andabnormalclimate,sohowtomaketheinstrumentrunwellinthefieldcircumstancemustbeconsidered.c)Abilityofanti-vibration.Theinstrumentforoutdoorapplicationmustkeepfreefrombeingdestroyedduringbeingtransportedlongdistancetothedestination.d)Storagecapacity.Becauseseismologicaldataislarge,howtostoreandcollectthelargeamountdataconvenientlyfromthefieldisalwaysadifficultpointinthemobileobservingsystemdesign.e)Automation.Timingandpositioningautomaticallyisnecessaryinthefield.f)Powerconsumption.Toreducethepowercon-sumptionaslowaspossibleisveryimportanttothemobileinstrumentwhicharepoweredwithbattery.g)Abilityoftestingitself.Testingitselfautomaticallymakeitconvenientinthefieldwork.h)Portability.Theinstrumentmustbeportableandsimplyoperated.
简介:Differentfluxeswereusedtosynthesizelongpersistencephosphors,calciumsulfidesactivatedbyEu2+andTm3+,byconvenientsolid-statemethod.ThephosphorusingNH4Fasafluxhasgoodcrystallinityandlargeparticlesize,itsstabilityagainstwaterandotheratmosphericcomponentsisenhanced,anditsafterglowislongerandfluorescentintensityismoreintensethanthoseofthephosphorusingNH4Clasflux.TheirPLintensitiesvariedwithtimeinmoistairweremeasured,noremarkablechangewasfoundforthosepreparedwithNH4FfluxincontrastwithNH4Clasflux.SousingNH4Fasfluxisagoodmethodtoenhancethestabilityofalkalineearthsulfides.
简介:Asingle-particlemicrobeamfacilityhasbeenconstructedattheLaboratoryofIonBeamBioengineering(LIBB),ChineseAcademyofSciences.Thesystemisdesignedtodeliverthedefinednumberofhydrogenions,coveringarangeofenergyfrom1.0to3.5MeV,intoanareasmallerthanthenucleiofindividuallivingcells.AccuracyoftheparticledetectionsystemandthecelltargetingsysteminthefacilityhasbeenassessedusingCR39(nucleartrackdetector)for2.3MeVprotons.Theresultsdemonstratethattheparticledetectionefficiencyisabove98%,andtheoveralltargetingaccuracyofthemicrobeamislimitedwithin3μmformorethan90%hits.
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