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Chang'e sees the world: This black technology allows blind people to perceive things around them, and they can also read books and newspapers?
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If it is born blind, it is dark; If it was the day after tomorrow, what he could see might be the colors he saw earlier.
What the blind man sees is the appearance of nothing objective in his mind, and he does not feel it.
Caressing the soft strands of hair in the eyes of the blind, they can't imagine what black is without an acquired concept, they can't see with their eyes, when we close our eyes, it's pitch black in front of our eyes, or we see it as black. For them, the eye is only a decoration, then they cannot perceive the color, and the shape. When we think of cubes, we need to recall the cubes we've seen:
It is square, with eight corners and six sides.
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Hello, black is the color formed by the absence of light, just like if you cover your eyes with your hand and see black. Congenitally blind people don't see black, their world is completely empty, empty. You can try to open one eye and close one eye, and the one that closes is the world of the blind.
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Having a guide dog can help the blind solve a lot of problems, it can help the owner lead the way, guide the way, avoid obstacles, go up the ladder and other things that normal people can do in daily life!
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Basic necessities of life.
Clothing: In addition to keeping warm, decorating oneself to reflect one's personality is already the biggest purpose, blind people do not know whether the clothes are neat, do not know whether the zipper is not pulled, whether the buttons are wrong. I don't know how to better hide my shortcomings.
Food: I don't know if the taste is good, I can't find a suitable restaurant, I don't know if the tableware is tidy or not: clean or not? Convenient or not?
Walk: Except for walking impairment, barrier-free access.
Too much, have you really thought about it?
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The sincerity of others, without falsehood.
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What is it like to be in the passage of the blind?
Hello hello, your question is that we are in the blind passageway, what is our feeling when we are in it? This person's feelings are subtle, and he can think of a clear-eyed person who is a brother and can say such things, which shows that his feelings are subtle. So let's talk about it, being in the passage of the blind, what kind of fighting do we feel in it?
That is, if a clear-eyed person walks on the passage of a blind person, what can we feel? We all feel the ruggedness of the blind road, and stepping on it is a feeling of unevenness, but the blind man is moving forward with this uneven feeling.
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Because these blind people can't see things, it is very difficult for them to travel or live, so we see that many people are now also beginning to pay attention to these disabled people, especially the blind Ruxiang, who will prepare some blind roads for the blind.
Originally, these blind alleys were specially designed for these blind people to be able to travel conveniently. However, we have seen that many blind alleys in the country are now generally occupied. Therefore, some people wonder why the phenomenon of blind road occupation is so common in China.
How to provide better protection for these visually impaired or blind people?
Indeed, we see that many cities now set up blind lanes for the blind, the purpose of which is to make it more convenient for the blind to travel. Originally, the intention was good, but we don't see that many times the blind roads are occupied by some bicycles or other small traders, and other things, so that although these blind people have blind roads, they rarely use them or are difficult to use, okay. This does bring great inconvenience to the blind people.
Therefore, first of all, we must not be able to occupy the blind road at will. For example, for some small vendors, then we can first designate some special areas for them to operate in the designated area. In this way, we can avoid the phenomenon of these small traders occupying the blind road, and for ordinary citizens, they may park bicycles and electric vehicles indiscriminately, then we should also stipulate that parking in a special area is not allowed to occupy the blind road, because this will affect the blind scum to travel.
I believe that through such correct guidance, everyone can try their best to let go of the blind road. Only by being able to give up the blind road better, so that every blind person can better use the blind road, so that the role of the blind road can be better played, and only in this way can we provide better services to those who have vision problems, or the blind can also bring a happier and better life to the blind.
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Blind and disabled in wheelchairs. In contrast, blind people will have more difficulties in life. Because blind people are almost blind, they can't see everything in front of them, and all aspects of travel will be greatly hindered.
There is a supermarket in Shanxi that has paved a blind road for the blind, which can be said to be very heartwarming, so what are the other heart-warming activities for the blind in daily life?
1. Blind people are allowed to carry guide dogs on buses and other means of transportation.
We all know that blind people can't see when they walk. Either you need a long cane to walk with a cane to see if there is any obstruction in front of you, or you need to go out with a guide dog. Generally speaking, it is better to carry a guide dog, because guide dogs have been professionally trained in all aspects, and only those who are trained to become guide dogs can become guide dogs.
If the blind person does not know that it is a red light and walks directly on the road when crossing the street, the guide dog will lie down and not walk, so that the blind person will be strongly sensitized. However, in the past, blind people were not allowed to carry guide dogs on the bus, because they were afraid that the guide dog would hurt other passengers, resulting in chaos in the bus. With the gradual improvement of the social system, guide dogs are more and more recognized by people, and blind people have been allowed to carry guide dogs on buses in many cities.
2. Open up special channels for the blind.
Blind people are actually a vulnerable group in society, and even the simplest way to withdraw money from the bank or handle business will be subject to many obstacles and restrictions. Now that such a channel has been specially opened, blind people can do business in their own channel, and they don't have to worry that there will be many people behind them, for fear of delaying other people's time. There are some relatively large catering institutions, and they have also set up special channels for blind people to eat and other issues, and there are people to lead the team throughout the process, and there will be more and more such heart-warming events.
Blind people just can't see with their eyes, but their hearts are very warm, but many blind people feel inferior because they can't see with their eyes, and they don't dare to go out at home every day. In fact, it doesn't have to be like this, if you go to walk around the outside world, you will feel that the outside world is very beautiful, everyone is warm and beautiful, and you want to help when you see people with disabilities. And with the gradual improvement of the social system, we believe that the policies for people with disabilities will become more and more sound, and we are no different.
The principle of lift The aircraft is a heavier aircraft than air, so it needs to consume its own power to obtain lift And the ** of lift is the effect of the air on the wing in flight In the following diagram, there is a schematic profile of the wing The upper surface of the wing is curved and the lower surface is flat, so when the wing is in relative motion to the air, the air flowing through the upper surface travels the distance (s1) in the same time (t) than the air flowing through the lower surface (s2), So the relative velocity of the air on the upper surface is faster than the air on the lower surface (v1=s1 t >v2=s2 t1) According to Panulli's theorem – "the pressure exerted by the fluid on the surrounding matter is inversely proportional to the relative velocity of the fluid", so the pressure exerted by the air on the upper surface of the wing f1 is less than that of the lower surface f2 The resultant force of f1 and f2 must go upward, which produces lift From the principle of the wing, we can also understand the working principle of the propeller The propeller is like a vertical wing, with the bulge facing forward, Smooth backward facing The resultant force of the pressure when rotating is forward, pushing the propeller forward, thereby driving the aircraft forward Of course, the propeller is not simply convex and smooth, but has a complex curved surface structure The old propeller is a fixed shape, and the later design adopts a design such as a relative angle that can be changed to improve the performance of the propeller Power principle: turbojet engine Turbofan engine Ramjet engine Turboshaft engine Flight needs power to make the aircraft move forward, and more importantly, to make the aircraft gain lift Early airplanes usually used piston engines as power, and four-stroke piston engines were the main The principle of this type of engine is shown in the figure, which is mainly to inhale air, mix with fuel and ignite and expand, drive the piston to reciprocate, and then convert it into the rotary output of the drive shaft: The power emitted by a single piston engine is very limited, so people connect multiple piston engines in parallel to form a star or V-piston engine The picture below shows a typical star piston engine Most modern high-speed aircraft use jet engines. The principle is to suck the air in, mix it with the fuel, ignite, and spray the expanded air backwards, and its reaction force pushes the aircraft forward In the engine profile diagram of the figure below, a compressed air fan sucks in air from the air intake, and the compressed air is one by one, so that the air can better participate in the combustion The orange-red cavity behind the fan is the combustion chamber, where the mixed gas of air and oil is ignited, and the combustion expansion is sprayed backwards, pushing the last two fans to rotate, and finally discharging the engine gas, thus completing an outside The last two fans are mounted on the same bottom bracket as the front compressor fan, so the compressor fan continues to suck in the empty work cycle
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