首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
Smart Windows Windows not only let light in to cut down on electricity use...
Smart Windows Windows not only let light in to cut down on electricity use...
admin
2020-12-24
21
问题
Smart Windows
Windows not only let light in to cut down on electricity use for lighting, but the light coming through the window also provides heat. However, windows are not something people typically associate with an advanced technology. Researchers are now working on new technologies that enable a window to quickly change from clear to dark and anywhere in between easily.
“ 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 winter, cold air leaks in. When ifs 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 (使人清新的), actually sucks 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 (用玻璃覆盖), and layering windows to make them more energy efficient. Smart windows go a step further. They use chromogenic (发色的)technologies which involve changes of color.
Eleclrochromic (电致色的)windows use electricity to change color. For example, a sheet of glass coated with thin layers of chemical compound such as tungsten oxide (氧化钨)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 (电压) 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 change 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 ths[t massive air conditioning systems may no longer be needed. “ In the future, ” Granqvisl: says, “ our buildings may look different. ”
The expression "when it comes to ' in paragraph 3 is used to
选项
A signal the arrival of a guest.
B indicate the recovery of consciousness.
C show your remembrance of something.
D introduce a new aspect of a topic.
答案
D
解析
转载请注明原文地址:https://ti.zuoweng.com/ti/vssQKKKQ
相关试题推荐
SmartWindows Windowsnotonlyletlightintocutdownonelectricityuse...
SmartWindows Windowsnotonlyletlightintocutdownonelectricityuse...
SmartWindows Windowsnotonlyletlightintocutdownonelectricityuse...
Severalwindowshadbeensmashed.A:cleanedB:brokenC:replacedD:fixed
Severalwindowshadbeensmashed.A.cleanedB.brokenC.replacedD.fixed
Severalwindowshadbeensmashed.AcleanedBbrokenCreplacedDfixed
SmartWindows Windowsnotonlyletlightintocutdownonelectricityuse...
SmartWindows Windowsnotonlyletlightintocutdownonelectricityuse...
Infinedays,you'dbetteropenwindowstoventilatetheroom.
Severalwindowshadbeensmashed.A.cleanedB.brokenC.replacedD.fixed
随机试题
患者,女,45岁,尿血日久,体倦乏力,气短声低,面色不华,舌质淡,脉弱。治疗应首
小儿麻痹后遗症手术矫正属于 A.康复医学 B.疗养学 C.理疗学 D.医
DIC的基本病理变化是 A、小动脉和毛细血管扩张 B、血小板损伤 C、
骨性关节炎的治疗,下列哪项表述不正确:
尿肌酐定量测定,尿标本中应加
决定市场类型划分的主要因素包括( )。A.厂商所生产产品的差别程度B.单个厂商对市场价格的控制程度C.厂商进入或退出一个行业的难易程度D.市场上厂商
根据区域火灾防控实际,在设定量化范围的基础上结合公安部2007年下发的《关于调整火灾等级标准的通知》中的火灾事故等级分级标准,将火灾风险分为四级,其中,髙...
根据《药品注册管理办法》,药品批准文号为“国药准字S20123008”的药品属于A.生物制品B.中成药C.化学药品D.进口药品
《煤矿安全监察条例》规定,煤矿安全监察机构发现煤矿未依法建立安全生产责任制的,有权( )。A.责令限期改正B.给予行政处罚C.对主要负责人处10万元以下的
目前我国的政策性银行包括()。A.中国人民银行B.中国农业银行C.中国进出口银行D.国家开发银行E.中国农业发展银行