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Listen carefully to the footsteps, and you can work out who is walking. The features commonly used to identify people are faces and fingerprints. But the way they walk is also a giveaway.

Researchers have used video cameras and computers to analyze people’s gaits. But translating such knowledge into a practical identification system can be tricky. Cameras are often visible? require good lighting and may have their view blocked by other people. A team led by Dr. Ozanyan and Dr. Scully have been looking for a better way to recognize gaits. Their answer: pressure-sensitive mats.

Such mats are nothing new. They have been part of security systems. But Ozanyan and Scully use a complicated version that can record the amount of pressure applied in different places as someone walks across it. The researchers turn to an artificial intelligence system to recognize such patterns. In a study in 2018, they tested the system on a database of footsteps of 127 people. They found its error rate in identifying who was a mere 0.7%. And Scully says even without a database of footsteps, the system can determine someone’s sex and a subject’s age.

One application of the mat-based gait-recognition system might be in health care, particularly for the elderly. A mat placed in a nursing home or an old person’s own residence could monitor changes in an individual’s gait that indicate certain illnesses. That would provide early warning of someone being at greater risk of falling over. Gait analysis might also be used as a security measure in the workplace, monitoring access to restricted areas, such as parts of military bases, server farms or laboratories dealing with dangerous materials. Perhaps the most interesting use of the mats, though, would be in public places, such as airports.

【小题1】What does the underlined word “giveaway” in paragraph 1 mean?
A.A present for free.B.A research of pressure.
C.An unintentional leak.D.An unidentified object.
【小题2】What is the mat used for?
A.Collecting data.B.Ensuring safety.
C.Determining age.D.Decreasing pressure.
【小题3】What might be an application of the gait-recognition system?
A.Monitoring security work progress.B.Detecting potential health problems.
C.Keeping track of travelling frequency.D.Warning passengers of possible dangers.
【小题4】What is the main purpose of the passage?
A.To compare different ways to identify people.
B.To show people the importance of technology.
C.To persuade people to buy the mat.
D.To inform people of something about pressure-sensitive mats.
21-22高二下·河南洛阳·期中
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“Giraffenap” has been created by a Japanese company and is intended to allow the user to take a rest while standing when you feel tired or sleepy with the aim of improving performance at work.

Rather than relying on coffee and endless yawns to try and make it through the workday, Koyoju Plywood Corporation declared about the “Giraffenap” that the nap box will allow you to “be refreshed” in just 20 minutes.

Giving in to your sleepiness and taking a 20-minute nap will apparently help improve your performance by recovering from tiredness, reducing stress, restoring memory and concentration, and improving creativity. A study by NASA has found that pilots who took a 26-minute nap experienced a 34 percent improvement in performance, and a 16 percent improvement in reaction time. “As a new way to take a break, we will provide a space where you can take a nap while standing in the office,” the site explains.

But why does it have to be standing? Well, the site explains that the research by Hokkaido University showed that sleeping while standing allows you to reach a sleep state in which you breathe lightly, so when you wake up you can feel the effect of a nap without having to sleep too much, and you can quickly return to work without feeling dizzy. Plus, making the box vertical (垂直的) rather than horizontal means that it takes up half as much floor space and makes it less likely that your boss will say there just isn’t room. The box also comes equipped with a fire extinguisher, smoke detector, and LED lighting for safety, and it blocks out sound from the outside to ensure a calm, sleep-worthy environment.

Now, I know what you’re thinking—wouldn’t you just fall down if you tried to sleep while standing? Well, not with Giraffenap’s design. The box is equipped with four points to support the body at the head, butt, legs and feet, meaning you can relax in the box while still remaining upright.

【小题1】Where is the “Giraffenap” designed to be used?
A.At home.B.In the field.
C.In the workplace.D.In the classroom.
【小题2】What does the third paragraph mainly tell us?
A.The benefits from taking a nap.B.The new finding by NASA.
C.The ways of improving productivity.D.The pilots’ experience with the “Giraffenap”.
【小题3】Why does the “Giraffenap” come in a vertical shape?
A.It will ensure the sleepers’ safety.B.The sleepers can breathe slowly.
C.It will occupy much less floor space.D.The sleepers can enter a deeper sleep state.
【小题4】What can we infer about the sleepers in the “Giraffenap”?
A.They have limited mobility.B.They will be disturbed by noise.
C.They come out feeling pretty dizzy.D.They’re likely to suffer injuries.

Today scientists are creating cool designs with smoother moves. Let’s check out the science behind four awesome robots.

TYPES

HOW IT WORKS

WHAT IT MEANS FOR YOU

T-HR3


The two-legged walking robot imitates the way people move. A human operator wears a headset with cameras that show what the robot “sees”. The human can then control the robot’s actions with his or her own human movements.

With a human helper, T-HR3 could assist people in medical facilities, burning buildings, construction sites, and even space. Its creators hope that T-HR3 will learn to do some tasks itself one day …like, say, your chores, maybe?

SHAPE-SHIFTIING


When a scientist programs in a shape/ the motors change different parts of the surface to make it look like whatever the scientist wants! The shape-shifting robot can be programmed to look like just about anything small and enter tiny space.

In addition to helping scientists secretly observe animals, the shape-shifting robot might one day be used to create more immersive virtual reality experiences. Imagine being able to touch objects in your VR game and not just see them!

SALTO


Rescuers have long used remote-controlled robots to search through nibble. But what’s special about Salto is its jumping ability, enabling it to reach places humans can’t. Twisted rubber bands in its legs make it bouncy enough to leap to high spaces.

Salto’s not just helpful in emergencies. Its technology might one day help fetch things from hard-to-reach places in your home, like that candy bar you hid on the top shelf of the cupboard.

SPOTMINI


The four-legged robot is designed to help with house chores. With its extendable arms, Spotmini can unload dishes and put them in high shelves, grab debris (碎片) in hard-to-reach places. It can even climb stairs.

Experts say future homes will have robots doing chores so that people have more free time. Instead of earning your allowance by taking out the garbage, you might be doing robot repairs instead.



【小题1】If you want to take a close picture of a poisonous snake, which robot is the most suitable?
A.T-HR3B.SHAPE-SHIFTINGC.SALTOD.SPOTMINI
【小题2】What these robots have in common is that they      .
A.work by using a remote-control
B.are designed to help with the housework
C.enable people to see whatever they “see”
D.carry out tasks where humans are hard to reach

An electric car is great for you, as a consumer, to save a lot of money on gas. However, there are so many different reasons why you should invest in an electric car in the modern day of technology.

No gas required. Electric cars are entirely charged by the electricity you provide, meaning you don’t need to buy any gas ever again. Driving fuel-based cars can burn a hole in your pocket as prices of fuel have gone all-time high. With electric cars, this cost of $2, 000 — $4, 000 on gas each year can be avoided. Though electricity isn’t free, an electric car is far cheaper to run.

Savings. These cars can be sold for very cheap prices, and many new cars will offer great incentives (优惠) for you to get money back from the government for going green. Electric cars can also be great to save money in your own life.

No emissions. Electric cars are 100 percent eco-friendly as they run on electrically powered engines. It does not send out toxic (有毒的)gases or smoke in the environment as it runs on a clean energy source. You’ll be contributing to a healthy and green climate.

Safe to drive. Electric cars go through the same fitness and procedures test as other fuel-powered cars. In case an accident occurs, one can expect airbags to open up and electricity supply to cut from battery. This can prevent you and other passengers in the car from serious injuries.

Reduced noise pollution. Electric cars can reduce noise pollution as they are much quieter. Electric motors are capable of providing smooth drive over longer distances.

【小题1】What is the subject discussed in the passage?
A.Safety provided by an electric car.
B.The reasons to buy an electric car.
C.The gas prices going high every day.
D.The technology used in a modern car.
【小题2】What do the underlined words in paragraph 2 mean?
A.It causes you to spend a lot of money.
B.Your money in your pocket was burnt.
C.Your pocket was burnt and the clothes were ruined.
D.Your pocket was burnt and a hole was made by the fire.
【小题3】Which is true according to the passage?
A.Electric cars are as safe as fuel-powered cars.
B.Electric cars can run faster than gas-powered cars.
C.Electric cars cost as much money as gas-powered cars.
D.Electric cars send out less waste gas than fuel-powered cars.

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