首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Smart Window Windows not only let light in to cut down an electricity use for lighting, but the light coming through the win
Smart Window Windows not only let light in to cut down an electricity use for lighting, but the light coming through the win
admin
2013-09-25
107
问题
Smart Window
Windows not only let light in to cut down an electricity use for lighting, but the light coming through the window also provides heat. However, windows are not something people typically associate with being a cutting edge technology. Researchers are now working on new technologies that enable a window to quickly change from clear to dark and anywhere in between with a flip of a switch.
"It took us a long time to figure out what a window really is, " says Claes Granqvist. He’s a professor of solid-state physics at Uppsala University in Sweden. "It’s contact with the outside world. You have to have visual contact with the surrounding world to feel well. " So, windows and natural light are important for improving the way people feel when they’re stuck indoors.
Yet, windows are the weak link in a building when it comes to energy and temperature control. In the winter, cold air leaks in. When it’s hot and sunny, sunlight streams in. All of this sunlight carries lots of heat and energy. And all of this extra heat forces people to turn on their air conditioners. Producing blasts of cold air, which can feel so refreshing, actually suck up enormous amounts of electricity in buildings around the world.
Windows have been a major focus of energy research for a long time. Over the years, scientists have come up with a variety of strategies for coating, glazing, and layering windows to make them more energy efficient. Smart windows go a step further. They use chromogenic technologies which involve changes of color.
Electrochromic windows use electricity to change color. For example, a sheet of glass coated with thin layers of chemical compound such as tungsten oxide works a bit like a battery. Tungsten oxide is clear when an electric charge is applied and dark when the charge is removed, that is, when the amount of voltage is decreased, the window darkens until it’s completely dark after all electricity is taken away. So applying a voltage determines whether the window looks clear or dark.
One important feature that makes a smart window so smart is that it has a sort of "memory". All it takes is a small jolt of voltage to turn the window from one state to the other. Then, it stays that way. Transitions take anywhere from 10 seconds to a few minutes, depending on the size of the window. The development of smart windows could mean that massive air conditioning systems may no longer need. "In the future, " Granqvist says, "our buildings may look different. "
What are smart windows, according to Paragraph 4?
选项
A、Windows that are coated.
B、Windows that are glazed.
C、Windows the color of which can be changed.
D、Windows that have many layers.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/kN1d777K
本试题收录于:
职称英语卫生类C级题库职称英语分类
0
职称英语卫生类C级
职称英语
相关试题推荐
YouareAccountManagerofABCCompany.YourcompanyorderedacertainvalueofwoolensweaterfromNewStyleFabricCompanybut
Inthe1950s,thepioneersofartificialintelligence(AI)predictedthat,bytheendofthiscentury,computerswouldbeconversi
Somepeoplebelievethatinternationalsportcreatesgoodwillbetweenthenationsandthatifcountriesplaygamestogetherthey
1.TheAmericanbabyboomafterthewarmadeunconvincingadvicetothepoorcountriesthattheyrestraintheirbirth.However,
Facialexpressionscarrymeaning,determinedbycontextsandrelationships.【R1】______Awoman’ssmileatapolicemanwhoisabou
Inthe1920s,demandforAmericanfarmproductsfell,asEuropeancountriesbegantorecoverfromWorldWarIandinstitutedaus
Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemforthemostofthemisunderstandings
Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemforthemostofthemisunderstandings
Ifaperformancebeginsat8p.m.,theGoddingtonTheatreTicketOfficere-opensat7:30thatevening.Wheelchairsareallowed
UnderstandingAutism1.Autism(孤独症)isalife-longdevelopmentaldisabilitythatpreventsindividualsfromproperlyunderstan
随机试题
两侧肩胛下角连线平对()
调整市场结构和规范市场行为,以“反对垄断、促进竞争、规范大型企业集团、扶持中小企业发展”为主要核心的政策是( )。
有利于提高个体自尊水平的做法包括()。
20世纪40年代末,美国物理学家()正式提出了宇宙大爆炸理论,认为宇宙起源于160亿年前温度和密度极高的“原始火球”的一次大爆炸。
学习的内部动机和外部动机是什么关系?
"It’sthattimeoftheyearagain-backtoschool!WiththenewschoolyearjustaroundthecornerIdecideitmightbeagoodid
设A=,方程组AX=β有解但不唯一.求可逆矩阵P,使得P-1AP为对角阵;
设A>0,D是由曲线段y=Asinx(0≤x≤π/2)及直线y=0,x=π/2所围成的平面区域,V1,V2分别表示D绕x轴与绕y轴旋转所成旋转体的体积.若V1=V2,求A的值.
Specificdirectionischaracterizedby_____.Behaviormodificationisdifferentfromtheotherthreemeasuresinthat_____.
HowdoesSerkis’versiondifferfromtheoriginalone?
最新回复
(
0
)