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
65
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. "
Which of the following statements is true of landslides?
选项
A、The initial movement is hard to spot.
B、They start with a movement of a few particles of soil or rock.
C、They can be destructive in a matter of hours or minutes.
D、All of the above.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/RN1d777K
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
B
Computerpeopletalkalotabouttheneedforotherpeopletobecome"computer-literate",inotherwords,tolearntounderstand
Experimentshaveshownthatinselectingpersonnelforajob,interviewingisatbestahindrance,andmayevencauseharm.Thes
1.Onceitwaspossibletodefinemaleandfemaleroleseasilybythedivisionoflabor.Menworkedoutsidethehomeandearned
Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemforthemostofthemisunderstandings
Whycan’tyoustopyoureternalcomplaining!
Thenurseryisbrightandcheerful.
I’mSorry,Iwon’tApologizeAlmostdaily,newsreportsincludeaccountsofpublicfiguresorheadsofcompaniesbeingforce
Wewereastonishedtohearthattheirfootballteamhadwonthechampion.
Thesearetheirmotivesfordoingit.
随机试题
历史观的基本问题是()
当前防治流感最有效的方法是什么
修复体粘固后患牙长时间持续疼痛,最可能
某企业报检一批出口玩具,并于2010年9月10日领取了《出境货物通关单》。以下情况中,企业须重新报检的有()。
【真题(初级)】下列各项中,违反货币资金业务内部控制要求的有()。
ABC会计师事务所负责审计甲公司2011年度财务报表,并委派A注册会计师担任审计项目合伙人。A注册会计师在审计甲公司关联方交易的过程中遇到下列事项,请代为做出正确的专业判断。A注册会汁师确定的下列审计程序中,对于发现甲公司管理层利用关联方交易编制虚假财
镜泊湖是大约1万年前,由于()而形成的。
Jack:I’dlikeahaircut,please.Barber:Wouldyoucareforashaveandashampooaswell?Jack:______.Ahaircutwillbejust
“乐以天下,忧以天下,然而不王者,未之有也”与下列哪一观点属于同一学派。()
A、Achurchclergy.B、Apsychologist.C、Acounselor.D、Asocialworker.A本题考查重要细节。根据句(1)可知,谢利在宾夕法尼亚州的布林茅尔长老会教堂担任副牧师,因此[A]为正确答案。
最新回复
(
0
)