有关LED的毕业论文外文翻译

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1、....RenewableandSustainableEnergyReviewsHigh-brightnessLEDs—EnergyefficientlightingsourcesandtheirpotentialinindoorplantcultivationABSTRACTTherapiddevelopmentofoptoelectronictechnologysincemid-1980hassignificantlyenhancedthebrightnessandefficiencyoflight-emitti

2、ngdiodes(LEDs).LEDshavelongbeenproposedasaprimarylightsourceforspace-basedplantresearchchamberorbioregenerativelifesupportsystems.TheraisingcostofenergyalsomakestheuseofLEDsincommercialcropcultureimminent.Withtheirenergyefficiency,LEDshaveopenednewperspectivesf

3、oroptimizingtheenergyconversionandthenutrientsupplybothonandoffEarth.ThepotentialsofLEDasaneffectivelightsourceforindooragriculturalproductionhavebeenexploredtoagreatextent.TherearemanyresearchesthatuseLEDstosupportplantgrowthincontrolledenvironmentssuchasplant

4、tissuecultureroomandgrowthchamber.ThispaperprovidesabriefdevelopmenthistoryofLEDsandabroadbasereviewonLEDapplicationsinindoorplantcultivationsince1990.Contents1.Introduction2.LEDdevelopment.3.Colorratiosandphotosynthesis4.LEDsandindoorplantcultivation.4.1.Plant

5、tissuecultureandgrowth4.2.Spaceagriculture84.3.Algaculture4.4.Plantdiseasereduction5.Intermittentandphotoperiodlightingandenergysaving6.Conclusion1.IntroductionWithimpactsofclimatechange,issuessuchasmorefrequentandseriousdroughts,floods,andstormsaswellaspestand

6、diseasesarebecomingmoreseriousthreatstoagriculture.Thesethreatsalongwithshortageoffoodsupplymakepeopleturntoindoorandurbanfarming(suchasverticalfarming)forhelp.Withproperlighting,indooragricultureeliminatesweather-relatedcropfailuresduetodroughtsandfloodstoprov

7、ideyear-roundcropproduction,whichassistinsupplyingfoodincitieswithsurgingpopulationsandinareasofsevereenvironmentalconditions.Theuseoflight-emittingdiodesmarksgreatadvancementsoverexistingindooragriculturallighting.LEDsallowthecontrolofspectralcompositionandthe

8、adjustmentoflightintensitytosimulatethechangesofsunlightintensityduringtheday.Theyhavetheabilitytoproducehighlightlevelswithlowradiantheatoutput专业....andmaintainusefullighto