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
考研
Many are aware of the tremendous waste of energy in our environment, but fail to take advantage of straightforward opportunities
Many are aware of the tremendous waste of energy in our environment, but fail to take advantage of straightforward opportunities
admin
2017-12-11
41
问题
Many are aware of the tremendous waste of energy in our environment, but fail to take advantage of straightforward opportunities to conserve that energy. For example, everyone knows that lights should be switched off when no one is in an office. Similarly, when employees are not using a meeting room, there is no need to regulate temperature.
Fortunately, one need not rely on
human intervention
to conserve energy. With the help of smart sensing and network technology, energy conservation processes such as turning off lights and adjusting temperature can be readily automated. Ultimately, this technology will enable consumers and plant managers to better identify wasteful energy use and institute procedures that lead to smarter and more efficient homes, buildings and industrial plants.
Until now, wires and cables for power and connectivity have limited the widespread adoption of sensor networks by making them difficult and expensive to install and maintain. Battery-powered wireless networks can simplify installation and reduce cost. But their high power consumption and the corresponding need for regular battery replacement has made wireless networks difficult and costly to maintain. Nobody wants to replace hundreds or thousands of window sensor batteries in a large building on a regular basis.
The promise of wireless sensor networks can only be fully realized when the wiring for both the data communication and the power supply is eliminated. Doing so requires a true battery- free wireless solution , one that can utilize energy harvested directly from the environments. To facilitate the widespread deployment of wireless sensor networks, Greenpeak has developed an ultra-low-power communication technology that can utilize environmental energy sources such as light, motion and vibration. This technology, employing on-board power management circuits and computer software to monitor energy harvesters and make the best use of harvested energy, enables sensors to operate reliably in a battery-free environment.
Wireless sensor networks deployed in our offices and homes will have an enormous impact on our daily lives, helping to build a smarter world in which energy is recycled and fully utilized. These wireless platforms, equipped with advanced sensing capability, will enable us to better control our lives, homes and environment, creating a truly connected world that enables people worldwide to live in a more comfortable, safer, and cleaner environment.
Batteries are not an ideal energy source for sensor networks because they
选项
A、have to be replaced from time to time.
B、contain metals that pollute the environment.
C、require automatic recharging.
D、are difficult and costly to maintain.
答案
A
解析
细节题。通过第三段第二到第五行可知,靠电池供电的无线网络可以简化安装程序,并 降低成本。但是由于网络能量消耗高,需要定期更换电池,所以这种网络很难维护,而且维护成 本相当高。因此答案为A项。
转载请注明原文地址:https://kaotiyun.com/show/F6BZ777K
0
考研英语一
相关试题推荐
Oldpeoplearealwayssayingthattheyoungarenotwhattheywere.Thesame【C1】______ismadefromgenerationtogenerationand
Asageneralrule,AmericanmenearnmorethanAmericanwomen.Thisholdstrueacrossindustries,acrosseducationlevels,anda
Asageneralrule,AmericanmenearnmorethanAmericanwomen.Thisholdstrueacrossindustries,acrosseducationlevels,anda
About3billionpeoplelivewithin100miles(160km)ofthesea,anumberthatcoulddoubleinthenextdecadeashumansflockt
About3billionpeoplelivewithin100miles(160km)ofthesea,anumberthatcoulddoubleinthenextdecadeashumansflockt
Scientistssaytheyhavefoundawaytoturnbodyfatintoabettertypeoffatthatburnsoffcaloriesandweight.TheUSJohns
Scientistssaytheyhavefoundawaytoturnbodyfatintoabettertypeoffatthatburnsoffcaloriesandweight.TheUSJohns
Justsevenyearsago,theTexasLegislatureprescribedthatallhighschoolersmustpasstwomathcoursesandgeometrytogradua
Justsevenyearsago,theTexasLegislatureprescribedthatallhighschoolersmustpasstwomathcoursesandgeometrytogradua
AlisonPrestonoftheUniversityofTexasatAustin’sCenterforLearningandMemoryexplains:Ashort-termmemory’sconversion
随机试题
甲要盖新房,与乙签订了一份购买沙土的合同。经过商定,乙向甲提供15车沙土,并且运送沙土的车不能是拖拉机。但在履行合同时,乙的车不够,便找了一辆牛车,把沙土运给了甲。甲拒绝接受,认为牛车装的沙土比拖拉机还少,便诉至法院。法院认为乙交付的沙土数量不足,构成违约
我国因茶类众多,但是不同茶类的审评方法和审评因子都相同。
A.山茱萸B.五倍子C.莲子D.诃子E.金樱子具有补脾止泻,养心安神功效的药物是()
甲、乙二公司均为日本公司,因合同纠纷在中国诉讼,下列说法哪些是正确的?()
当设计对砖基础墙防潮层无具体要求时,防潮层宜采用加适量防水剂的1:2水泥砂浆铺设,其厚度宜为()mm。
法玛根据历史信息、公开信息和内部信息这三类信息,将资本市场的有效程度分为()。
清朝的福陵、昭陵在()。
Somepoliticiansarescurryingaboutwithmuchzestandanticipation.It’stime,theirpollsinformthem,tofindthequickfix
Theguestteamwasbeatenbythehostteam2_____4inlastyear’sCFACupFinal.
Thesepictures______tohismindhispreviousdaysinChina.
最新回复
(
0
)