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
2011-01-02
40
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. "
To make electrochromic windows change color, what is applied to the window glass?
选项
A、Electricity.
B、Tungsten oxide.
C、A battery.
D、A voltage.
答案
B
解析
第五段第二句提供了答案。A sheet of glass coated with thin layers of chemical compound such as tungsten oxide中的coated是“涂上一层薄薄的……,”的意思。
转载请注明原文地址:https://kaotiyun.com/show/DyLd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
Colorchangesinchameleonsseemtobecausedbyenvironmentaltemperatureaswellasbyotherexternalstimuli.
ScientistsDevelopWaysofDetectingHeartAttackGermanresearchershavecomeupwithanewgenerationofdefibrillators(除颤
DNAFingerprintingDNAisthegeneticmaterialfoundwithinthecellnucleiofalllivingthings.Inmammals(哺乳动物)thestrand
ManyChildren’sDeathsPreventable:WHOOverfivemillionchildrendieeachyearfromdisease,infectionsandaccidentsrela
ManyChildren’sDeathsPreventable:WHOOverfivemillionchildrendieeachyearfromdisease,infectionsandaccidentsrela
LivingAloneCouldBeGoodforYourWeightGoodnewsforpeoplelivingalone:Aforthcomingpapershowsthatsingleadults—o
DuringtheApril28earthquake,thewholeEnglandwasleftwithoutpower.Itwasreportedthatoneladyhadgotherheadandne
SingingAlarmsCouldSavetheBlindIfyoucannotsee,youmaynotbeabletofindyourwayoutofaburningbuilding--andtha
Agreatdealhasbeendonetoremedythesituation.
Butintheendheapprovedofourproposal.
随机试题
关于门静脉高压症的术后护理,错误的是
检验批抽样方案中合理分配生产方风险和使用方风险时,对应于主控项目合格质量水平的错判概率α不宜超过5%,漏判概率β不宜超过()。
持票人为出票人的,对其前手无追索权。()
持站台票上车并在开车后20分钟后仍不声明的,按无票处理。()
2016年2月1日,习近平同志在中国人民解放军战区成立大会上强调,军队要时刻听从党和人民召唤,忠实履行党和人民赋予的神圣使命。从政治生活的角度看,“时刻听从党和人民召唤”的依据是()。①中国共产党是执政党②我国是人民当家作主的社会主义国家③党具有
北京:北京市将继续扩大错时上下班范围,研究调整全市各级党政机关上下班时间。6月1日,北京市政府办公厅出台《缓解北京市区交通拥堵第六阶段(2009年)工作方案》。根据方案,到2012年,早晚高峰路网运行速度比2008年底提高3%,市区公共交通出行比
论述课程内容组织中“横向组织”和“纵向组织”的关系。(2017年华东师大)
新时期最显著的成就是()
在考生文件夹下有一个工程文件sjt5.vbp,在该工程中为考生提供了一个通用过程,考生可以直接调用。请在窗体上画一个名称为Text1的文本框;画一个名称为C1、标题为“计算”的命令按钮;再画两个单选按钮,名称分别为Op1、Op2,标题分别为“求500到60
在窗体中有一个标签Lb1和一个命令按钮Command1,事件代码如下:OptionCompareDatabaseDimaAsString*10PrivateSubCommand1Click()a="12
最新回复
(
0
)