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(山崩;地滑;塌方)Early Warning A device that provides early warning of a landslide by monitoring
Listening Device Provides Landslide(山崩;地滑;塌方)Early Warning A device that provides early warning of a landslide by monitoring
admin
2011-01-05
47
问题
Listening Device Provides Landslide(山崩;地滑;塌方)Early Warning
A device that provides early warning of a landslide by monitoring vibrations (振动)in soil is being tested by UK researchers. The device could save thousands of lives each year by warning when an area should be evacuated(疏散,撤走), the scientists say. Such natural disasters are common in countries that experience sudden, heavy rainfall(降雨,降雨量), and can also be triggered by earthquakes and even water erosion(腐蚀,侵蚀).
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 Southborough 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 (即将发生的) landslide is to watch for changes in its shape. Surveyors can do this by measuring aside directly, or sensors(传感器) sunk into boreholes(钻孔,井眼)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(砾,沙砾,砾石)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(堤岸)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 he 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
短文第三段倒数第二句提到“但是,没有山体滑坡,山坡也可以改变形状,所以任何一种方法(普通方法)都可能产生假警报”,故选C。
转载请注明原文地址:https://kaotiyun.com/show/gMQd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
ActiveinOldAgeKeepsPeopleMobilePeopleover70whoaren’tactivearemorelikelytodevelopproblemswalkingorclimbin
ExerciseWhetherornotexerciseaddstothelengthoflife,itiscommonexperiencethatacertainamountofregularexerci
Single-parentKidsDoBestSinglemumsarebetteratraisingtheirkidsthantwoparents—atleastinthebirdworld.Mother
Single-parentKidsDoBestSinglemumsarebetteratraisingtheirkidsthantwoparents—atleastinthebirdworld.Mother
Lookingtohelptheenvironment?Considerthefollowingsimpleideas.Turnoffelectricaldeviceswhenthey’renotbeinguse
ANewMedicinetoTreatBothAIDSandHepatitisBAmedicineapprovedlastmonthtotreatAIDS(艾滋病)alsoshowspromiseagain
FDAhasapprovedtheplanofusingHIVtocurecancerinhumans.TheideaofusingHIVforabeneficialpurposehasbeenwidely
DungtodeathFieldsacrossEuropearecontaminatedwithdangerouslevelsoftheantibiotics(抗生素)giventofarmanimals.T
DungtodeathFieldsacrossEuropearecontaminatedwithdangerouslevelsoftheantibiotics(抗生素)giventofarmanimals.The
CaffeineCaffeineisprobablythemostwidelyuseddrugintheworld.Humanshavebeenconsumingcaffeineforhundredsofyea
随机试题
某社工曾帮助一名青少年重新入学读书,该少年的父母很感激,打算送礼并宴请这位社工。你认为该社工遇到了哪种伦理难题?()
组织所采取的传统绩效评估方法有()
女性,26岁,3年前因劳动后心悸、气促,诊断为风湿性二尖瓣狭窄。近3天咳嗽,咳血丝痰,夜间咳嗽加重,平卧位气促,被迫坐起后症状稍缓解。检查:血压120/80mmHg,心率90次/分整,S1升高,S2升高,A2MDM3/6隆隆样,收缩期前增强。超声心动图:L
双侧瞳孔缩小见于
A.消毒B.灭菌C.防腐D.无菌E.传染70%~75%乙醇涂擦局部皮肤称为
A.甲胎蛋白阳性B.X线钡灌肠造影见“杯口状”阴影C.X线钡剂造影可见龛影D.血沉加快E.血清T3T4升高原发性肝癌有意义的检查结果是
患者因严重烧伤住院,需给予鼻饲要素饮食补充营养。给患者插管时,下列哪一项不妥()
体育是以()为目标的教育活动。
下列解释事实的方程式不准确的是()。
关系中主码不允许取空值指的是()约束规则。
最新回复
(
0
)