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1、09年职称英语理工类阅读理解模拟试题SmartWindow Windowsnotonlyletlightintocutdownanelectricityuseforlighting,butthelightcomingthroughthewindowalsoprovidesheat.However,windowsarenotsomethingpeopletypicallyassociatewithbeingacuttingedge1technology.Researchersarenowworkingonnewtechnologies
2、thatenableaw indowtoquicklychangefromcleartodarkandanywhereinbetweenwithaflipofaswitch2. “Ittookusalongtimetofigureoutwhatawindowreallyis,”saysClaesGranqvist.He’saprofessorofsolid-statephysicsatUppsalaUniversityinSweden3.“It’scontactwiththeoutsideworld.Youhavetohavevis
3、ualcontactwiththesurroundingworldtofeelwell.”So,windowsandnaturallightareimportantforimprovingthewaypeoplefeelwhenthey’restuckindoors.Yet,windowsaretheweaklinkinabuildingwhenitcomestoenergyandtemperaturecontrol.Inthewinter,coldairleaksin.Whenit’shotandsunny,sunlightstream
4、sin.Allofthissunlightcarrieslotsofheatandenergy.Andallofthisextraheatforcespeopletoturnontheirairconditioners.Producingblastsofcoldair,whichcanfeelsorefreshing,actuallysuckupenormousamountsofelectricityinbuildingsaroundtheworld.转自学易网www.studyez.com转自学易网www.studyez.com
5、Windowshavebeenamajorfocusofenergyresearchforalongtime.Overtheyears,scientistshavecomeupwithavarietyofstrategiesforcoating,glazing,andlayeringwindowstomakethemmoreenergyefficient.Smartwindowsgoastepfurther.Theyusechromogenictechnologieswhichinvolvechangesofcolor.Electroch
6、romicwindowsuseelectricitytochangecolor.Forexample,asheetofglasscoatedwiththinlayersofchemicalcompoundsuchastungstenoxideworksabitlikeabattery.Tungstenoxideisclearwhenanelectricchargeisappliedanddarkwhenthechargeisremoved,thatis,whentheamountofvoltageisdecreased,thewindow
7、darkensuntilit’scompletelydarkafterallelectricityistakenaway.Soapplyingavoltagedetermineswhetherthewindowlooksclearordark.转自学易网www.studyez.com Oneimportantfeaturethatmakesasmartwindowsosmartisthatithasasortof“memory.”Allittakesisasmalljoltofvoltagetoturnthewindowfromo
8、nestatetotheother.Then,itstaysthatway.Transitionstakeanywherefrom10secondstoafewminutes,dependin
