有关LED的毕业论文外文翻译

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1、.RenewableandSustainableEnergyReviewsHigh-brightnessLEDs—EnergyefficientlightingsourcesandtheirpotentialinindoorplantcultivationABSTRACTTherapiddevelopmentofoptoelectronictechnologysincemid-1980hassignificantlyenhancedthebrightnessandefficiencyoflight-emittingdiodes(LEDs).LEDsh

2、avelongbeenproposedasaprimarylightsourceforspace-basedplantresearchchamberorbioregenerativelifesupportsystems.TheraisingcostofenergyalsomakestheuseofLEDsincommercialcropcultureimminent.Withtheirenergyefficiency,LEDshaveopenednewperspectivesforoptimizingtheenergyconversionandthe

3、nutrientsupplybothonandoffEarth.ThepotentialsofLEDasaneffectivelightsourceforindooragriculturalproductionhavebeenexploredtoagreatextent.TherearemanyresearchesthatuseLEDstosupportplantgrowthincontrolledenvironmentssuchasplanttissuecultureroomandgrowthchamber.Thispaperprovidesabr

4、iefdevelopmenthistoryofLEDsandabroadbasereviewonLEDapplicationsinindoorplantcultivationsince1990.Contents1.Introduction2.LEDdevelopment.3.Colorratiosandphotosynthesis4.LEDsandindoorplantcultivation.4.1.Planttissuecultureandgrowth4.2.Spaceagriculture84.3.Algaculture4.4.Plantdise

5、asereduction5.Intermittentandphotoperiodlightingandenergysaving6.Conclusion1.IntroductionWithimpactsofclimatechange,issuessuchasmorefrequentandseriousdroughts,floods,andstormsaswellaspestanddiseasesarebecomingmoreseriousthreatstoagriculture.Thesethreatsalongwithshortageoffoodsu

6、pplymakepeopleturntoindoorandurbanfarming(suchasverticalfarming)forhelp.Withproperlighting,indooragricultureeliminatesweather-relatedcropfailuresduetodroughtsandfloodstoprovideyear-roundcropproduction,whichassistinsupplyingfoodincitieswithsurgingpopulationsandinareasofsevereenv

7、ironmentalconditions.Theuseoflight-emittingdiodesmarksgreatadvancementsoverexistingindooragriculturallighting.LEDsallowthecontrolofspectralcompositionandtheadjustmentoflightintensitytosimulatethechangesofsunlightintensityduringtheday.Theyhavetheabilitytoproducehighlightlevelswi

8、thlowradiantheatoutput...andmaintainusefullightoutputf