智能手机中的传感器可用来组建地震网

时间：2013-09-30 08:41:57

（单词翻译:单击）

A tiny chip used in smart phones to adjust the orientation1（定向） of the screen could serve to create a real-time urban seismic2 network, easily increasing the amount of strong motion data collected during a large earthquake, according to a new study published in the October issue of the Bulletin of the Seismological Society of America (BSSA). Micro-Electro-Mechanical System (MEMS) accelerometers measure the rate of acceleration3 of ground motion and vibration4 of cars, buildings and installations. In the 1990s MEMS accelerometers revolutionized the automotive airbag industry and are found in many devices used daily, including smart phones, video games and laptops.
 
Antonino D'Alessandro and Giuseppe D'Anna, both seismologists at Istituto Nazionale di Geosifica e Vulcanologia in Italy, tested whether inexpensive MEMS accelerometers could reliably and accurately5 detect ground motion caused by earthquakes. They tested the LIS331DLH MEMS accelerometer installed in the iPhone mobile phone, comparing it to the earthquake sensor6 EpiSensor ES-T force balance accelerometer produced by Kinemetrics Inc.
 
The tests suggest that the MEMS accelerometers can detect moderate to strong earthquakes (greater than magnitude 5) when located near the epicenter. The device produces sufficient noise to prevent it from accurately detecting lesser7 quakes -- a limitation to its use in monitoring strong motion.
 
D'Alessandro and D'Anna note that the technology is rapidly evolving, and there will soon be MEMS sensors8 that are sensitive to quakes less than magnitude 5. The real advantage, say the authors, is the widespread use of mobile phones and laptops that include MEMS technology, making it possible to dramatically increase coverage9 when strong earthquakes occur.
 
The current state of the MEMS sensors, suggest the authors, could be used for the creation of an urban seismic network that could transmit in real-time ground motion data to a central location for assessment10. The rich volume of data could help first responders identify areas of greatest potential damage, allowing them to allocate11（分配） resources more effectively.
 
The article, "Suitability of low-cost three-axis MEMS accelerometers in strong-motion seismology: tests on the LIS331DLH (iPhone) accelerometer," is published in October issue of BSSA.

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1 orientation IJ4xo     
n.方向，目标；熟悉，适应，情况介绍
参考例句：
  • Children need some orientation when they go to school.小孩子上学时需要适应。
  • The traveller found his orientation with the aid of a good map.旅行者借助一幅好地图得知自己的方向。
2 seismic SskyM     
a.地震的，地震强度的
参考例句：
  • Earthquakes produce two types of seismic waves.地震产生两种地震波。
  • The latest seismic activity was also felt in northern Kenya.肯尼亚北部也感觉到了最近的地震活动。
3 acceleration ff8ya     
n.加速，加速度
参考例句：
  • All spacemen must be able to bear acceleration.所有太空人都应能承受加速度。
  • He has also called for an acceleration of political reforms.他同时呼吁加快政治改革的步伐。
4 vibration nLDza     
n.颤动，振动；摆动
参考例句：
  • There is so much vibration on a ship that one cannot write.船上的震动大得使人无法书写。
  • The vibration of the window woke me up.窗子的震动把我惊醒了。
5 accurately oJHyf     
adv.准确地，精确地
参考例句：
  • It is hard to hit the ball accurately.准确地击中球很难。
  • Now scientists can forecast the weather accurately.现在科学家们能准确地预报天气。
6 sensor sz7we     
n.传感器，探测设备，感觉器（官）
参考例句：
  • The temperature sensor is enclosed in a protective well.温度传感器密封在保护套管中。
  • He plugged the sensor into a outlet.他把传感器插进电源插座。
7 lesser UpxzJL     
adj.次要的，较小的；adv.较小地，较少地
参考例句：
  • Kept some of the lesser players out.不让那些次要的球员参加联赛。
  • She has also been affected,but to a lesser degree.她也受到波及，但程度较轻。
8 sensors 029aee483db9ae244d7a5cb353e74602     
n.传感器，灵敏元件( sensor的名词复数 )
参考例句：
  • There were more than 2000 sensors here. 这里装有两千多个灵敏元件。 来自《简明英汉词典》
  • Significant changes have been noted where sensors were exposed to trichloride. 当传感器暴露在三氯化物中时，有很大变化。 来自辞典例句
9 coverage nvwz7v     
n.报导，保险范围，保险额，范围，覆盖
参考例句：
  • There's little coverage of foreign news in the newspaper.报纸上几乎没有国外新闻报道。
  • This is an insurance policy with extensive coverage.这是一项承保范围广泛的保险。
10 assessment vO7yu     
n.评价；评估；对财产的估价，被估定的金额
参考例句：
  • This is a very perceptive assessment of the situation.这是一个对该情况的极富洞察力的评价。
  • What is your assessment of the situation?你对时局的看法如何？
11 allocate ILnys     
vt.分配，分派；把…拨给；把…划归
参考例句：
  • You must allocate the money carefully.你们必须谨慎地分配钱。
  • They will allocate fund for housing.他们将拨出经费建房。

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