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
43
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
About3billionpeoplelivewithin100miles(160km)ofthesea,anumberthatcoulddoubleinthenextdecadeashumansflockt
Airpollutionkilledaboutsevenmillionpeoplelastyear,makingittheworld’ssinglebiggestenvironmentalhealthrisk,theW
Scientistssaytheyhavefoundawaytoturnbodyfatintoabettertypeoffatthatburnsoffcaloriesandweight.TheUSJohns
Scientistssaytheyhavefoundawaytoturnbodyfatintoabettertypeoffatthatburnsoffcaloriesandweight.TheUSJohns
Justsevenyearsago,theTexasLegislatureprescribedthatallhighschoolersmustpasstwomathcoursesandgeometrytogradua
Justsevenyearsago,theTexasLegislatureprescribedthatallhighschoolersmustpasstwomathcoursesandgeometrytogradua
Thenewsaboutvitaminskeepsgettingworse.Manystudiespublishedinthelastfewyearsshowsthatavarietyofpopularsupple
Sciencemovesforward,theysay,notsomuchthroughtheinsightsofgreatmenofgeniusasbecauseofmoreordinarythingslike
随机试题
美国房地产经纪业为了保证房地产业的健康发展,建立了严格的执业资质与教育训练制度,它们是()等制度。
出租汽车采用营业站定点服务时,营业站的服务半径不宜大于(),其用地面积为()。
下列关于会计恒等式的说法正确的有()。
完全竞争市场中,厂商产品所对应的价格是()。
bailoutplan
PnP主板主要是支持______。
下列数据结构中,属于非线性的是()。
Access数据库中的SQL查询中的GROUPBY语句用于()。
The"Karat"markingonjewelrytellsyouwhatproportionofgoldismixedwithothermetals.If14partsofgoldaremixedwith
Theworldisgoingthroughthebiggestwaveofmergersandacquisitionseverwitnessed.TheprocesssweepsfromhyperactiveAmer
最新回复
(
0
)