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Researchers have developed new software using smart phones¡¯GPS and imaging abilities that determine the exact location of distant objects as well as monitor the speed and direction of moving objects£®The software could eventually allow smart phone-armed soldiers to target the location of their enemies£®On the home front£¬the software could be used by everyone£¬including golfers judging distance to the green and biologists documenting the location of a rare animal without disturbing it£®
¡°The great advantage of a Smartphone is that it provides so many tools in a single£¬readily available£¬relatively inexpensive package£¬¡±said Qia Wang£¬a doctoral student who led the development of the software£®¡°For example£¬on the battlefield£¬a soldier needs a rangefinder£¬compass£¬GPS and other tools to get information before calling in an air strike£®With our software£¬the soldier can have all those instruments in one device that can be purchased off the shelf£®When that soldier returns from War£¬she can use the same Software to protect her family by clocking a speeder near her children¡¯s school and catching the criminal on video£®¡±
Wang and his colleagues developed their software to locate and track£º
Targets of known size¡ªwhen the size of the target is known£®a single image is enough to pinpoint the target¡¯s location£®
Targets of unknown size¡ªIf the exact size of a target is unknown£¬the software uses two images to triangulate the location of the target¡¤
Moving targets¡ªBy taking a short video of a moving target£¬the smartphone software can calculate how fast the target is moving and in what direction it is going.
¡°Currently£¬our software is limited by the physical abilities of smartphone hardware£¬but the devices are improving rapidly£¬¡±Wang said£®¡°We expect that improvements in GPS accuracy£¬battery life and camera resolution will allow our software to make even more accurate observations£®¡±
1.From Paragraph 1 we can know that the new software can.
A£®determine the speed of moving objects
B£®1ocate objects in the distance exactly
C£®defend soldiers against their enemies
D£®help biologists protect rare animal
2.The example given by Qia Wang is meant to .
A£®make an advertisement
B£®describe the software briefly
C£®show the benefits of the software
D£®present the functions of smartphones
3.How does the software calculate the speed of a moving object?
A£®By taking a short video£®
B£®By locating its position.
C£®By taking a single image£®
D£®By measuring real-life size.
4.What¡¯s Qia Wang¡¯s attitude towards the future of the software?
A£®Casual£® B£®Optimistic£® C£®Cautious£®D£®Flexible
5.What is the best title of the text?
A£®Qia Wang£¬a Talented Doctoral Student
B£®Use Smartphones to Their Full Potential
C£®Targeting and Tracking With Smartphones
D£®Smartphone-armed Soldiers on the Battlefield
1.B
2.C
3.A
4.B
5.C
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