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
Listening Device Provides Landslide Early Warning A device that provides early warning of a landslide by monitoring vibratio
Listening Device Provides Landslide Early Warning A device that provides early warning of a landslide by monitoring vibratio
admin
2013-09-25
32
问题
Listening Device Provides Landslide Early Warning
A device that provides early warning of a landslide by monitoring vibrations in soil is being tested by UK researchers. Tile device could save thousands of lives each year by warning when an area should be evacuated, the scientists say. Such natural disasters are common in countries that experience sudden, heavy rainfall, and can also be triggered by earthquakes and even water erosion.
Landslides start when a few particles of soil or rock within a slope start to move, but the early stages can be hard to spot. Following this initial movement, "slopes can become, unstable in a matter of hours or minutes, " says Nell Dixon at Loughborough University, UK. He says a warning system that monitors this movement "might be enough to evacuate a block of fiats or clear a road, and save lives. "
The most common way to monitor a slope for signs of an imminent landslide is to watch for changes in its shape. Surveyors can do this by measuring a site directly, or sensors sunk into boreholes or fixed above ground can be used to monitor the shape of a slope. Slopes can, however, change shape without triggering a landslide, so either method is prone to causing false alarms. Now Dixon’s team has developed a device that listens for the vibrations caused when particles begin moving within a slope.
The device takes the form of a steel pipe dropped into a borehole in a slope. The borehole is filled in with gravel around the pipe to help transmit high-frequency vibrations generated by particles within the slope. These vibrations pass up the tube and are picked up by a sensor on the surface. Software analyses the vibration signal to determine whether a landslide may be imminent.
The device is currently being tested in a 6-metre-tall artificial clay embankment in Newcastle, UK. Early results suggest it should provide fewer false positives than existing systems. Once it has been carefully and thoroughly tested, the device could be used to create a complete early-warning system for dangerous slopes.
"Locations with a significant risk of landslides could definitely benefit from a machine like this, " says Adam Poulter.an expert at the British Red Cross. "As long as it doesn’t cost too much. " But, Poulter adds that an early-warning system may not be enough on its own. "You need to have the human communication, " he says. "Making systems that get warnings to those who need them can be difficult. "
Why do researchers develop a new device to monitor signs of landsides?
选项
A、Because the new device can measure the site directly.
B、Because the new device can be sunk into boreholes or fixed above ground.
C、Because the common methods can cause false alarms.
D、Because the common methods are useless.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/xN1d777K
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
Writeaboutthefollowingtopic:Technologygivesyoungpeopletodayknowledgeandpowerthattheyhaveneverhadbefore.Th
Readthefollowingletterandcompletethegiveninformationform.Writeaword,phraseornumberinthespaces1-5.De
JohnSmithisgoingtoapplyforvisatotheUnitedStates.Heneedsaletterfromhisemployertoguaranteethathehasbeenwo
Readthefollowingpassageandanswerquestions9-18.1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalk
Facialexpressionscarrymeaning,determinedbycontextsandrelationships.【R1】______Awoman’ssmileatapolicemanwhoisabou
Recently,amanwhowasalwaysingoodhealth,spentaweekinbedwithsevereflu.Itwastheworstillnessinhislife.Thepr
1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalking,cyclingorswimming,orinwinter,skatingorski
Beautyhasalwaysbeenregardedassomethingpraiseworthy.【R1】______Theyhavebettermarriagesandhavemorerespectableoccupat
Thenurseryisbrightandcheerful.
Thesearetheirmotivesfordoingit.
随机试题
甲、乙、丙三人以3:2:1的比例按份共有一头骆驼,用于旅游服务。现甲欲将自己的份额转让给丁,乙、丙均要求以同等条件购买。甲的份额应当
患者王某,因服毒昏迷不醒,入急诊室抢救,其家属不能准确地说出毒物的名称及性质,观察患者双侧瞳孔缩小。根据患者瞳孔变化初步判断患者可能是()。
有关会阴切开缝合术,正确的是()
A.组胺B.阿司咪唑C.苯海拉明D.法莫替丁E.酚妥拉明
客户的下列信息中属于定量信息的是()
一个求助对象找到社会工作者对他}兑:“我最近失恋了,心里很难过。”这时,社会工作者首先要做的工作是()。
社区工作者宏观上应具备的素质包括()。
钱某一直游手好闲,某日偶然得知好友孙某有存款50万元,便心生歹意。次日,钱某约李某一起喝酒,并告知李某.孙某欠自己20万元一直未归还,如若李某同意帮忙一起索要这笔欠款,便给李某2万元作为酬谢。李某欣然同意。某日,钱某以一起聚会吃饭为由,伙同李某把
•Lookatthestatementsbelowandthefiveextractsfromanarticleabout"Dilution"ofcontrolinwardandoutward.•Whichartic
Whowastheinventorofchewinggum?
最新回复
(
0
)