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  3. 共用题干 Pool Watch______(46)The Royal Society for the Prevention of Accidents s...

共用题干 Pool Watch______(46)The Royal Society for the Prevention of Accidents s...

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问题 共用题干
Pool Watch
______(46)The Royal Society for the Prevention of Accidents says that on average 1 5 pe6ple drown in British pools each year,but many more suffer major injury after getting into difficulties.Nowa French company has developed an artificial intelligence system called Poseidon that sounds the alarm when it sees someone in danger of drowning.
When a swimmer sinks towards the bottom of the pool,the new system sends an alarm signal to a poolside monitoring station and a lifeguard ' s pager（携带式电子呼叫机）.In trials at a pool in Ancenis , it saved a life within just a few months,says Alistair McQuade,a spokesman for its maker,Poseidon Technologies.
______(47)AI software analyses the images to work out swimmers'trajectories（轨迹）.To do this re-liably,it has to tell the difference between a swimmer and the shadow of someone being cast onto the bottom or side of the pool."The underwater environment is a very dynamic one,with many shadows and reflections dancing around,"says McQuade.
The software does this师"projecting" a shape in its field of view onto an image of the far wall of the pool.It does the same with an image from another camera viewing the shape from a different angle.If the two projections are in the same position,the shape is identified as a shadow and is ignored.______（48)
To pick out potential drowning victims,anyone in the water who starts to descend slowly is added to the software's"pre-alert"list,says McQuade.______(49)Poseidon double-checks that the image really is of a swimmer,not a shadow， by seeing whether it obscures the pool's floor texture when viewed from overhead.if so, it alerts the lifeguard,showing the swimmer's location on a poolside screen.
The first full-scale Poseidon system will be officially opened next week at a pool in High Wycombe, Buckinghamshire.______(50)Baylis runs a company that installs swimming pools-and he was once an underwater escapologist (擅长从捆扎的绳索中脱身的杂技演员）with a circus." I say full marks to them if this works and can save lives,"he says.
选项 ______(49)
A:But if they are different,the shape is a swimmer and so the systeni follows its trajectory.
B:One man who is impressed with the idea is Travor Baylis,inventor of the clockwork（时钟机构）radio.
C:Swimmers can drown in busy swimming pools when lifeguards fail to notice that they are in trouble.
D:Baylis says that any local authority spending￡30,000-plus on a Poseidon system ought to be investing similar amounts in teaching children to swim.
E:Swimmers who then stay immobile on the pooi bottom for 5 seconds or more are considered in danger of drowning.
F:Poseidon keeps watch through a network of underwater and overhead video cameras.
答案E
解析后面一句话说防止事故发生的皇家协会说每年平均有15个人在英国的游泳池里被淹死。联系上下文可知，此处应该与游泳者溺水有关。C项符合语境。
前面一段话说当一个游泳者要沉到池底时，波塞冬（一种人工智能系统）就会给池边的监视站和救生员的电子呼叫机发出警告信号。后面一句话说Al软件分析图像得出游泳者的轨迹。它们都是对波塞冬工作原理的描述，因此此处也应该与其工作原理有关。再联系上下文可知，此处应该是说波塞冬对游泳者进行监视，并能获取有关图像。F项符合语境。
这段话讲的是波塞冬系统对投射在游泳池里的影像进行分析的原理。由前面两句话“它对一个从不同角度看到这个形状的摄像机上的图像做了同样的处理。如果这两个投影在同一位置，这个形状就被认作是阴影而被忽略掉。”可知，此处应该是从另一种角度来看这个形状。A项符合语境。
前面一句话说为了找到潜在的被淹的受害者，水中任何一个开始缓慢下沉的人都会进人软件的“预警”名单。而后面一句话说波塞冬通过从头上看它是否使游泳池地面的纹理变模糊，来双重确定图像是真正的游泳者，而不是阴影。联系上下文可知，此处应该是当游泳者真正遇到溺水危险时波塞冬的反应。E项符合语境。
前面一句话说第一个完整的波塞冬系统将要在一个游泳池正式开放。后面一句话提到了Baylis，他经营一家安装游泳池的公司，他说“如果波塞冬系统能起作用并且可以挽救别人的生命，那我会给它打满分。”联系上下文可知，此处应该提到了Baylis，并且波塞冬系统将被应用给他留下了深刻印象。B项符合语境。
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