Chapter 1206 Nanyang that promotes human civilization (second update, please subscribe)
Thousands of people enter Nanyang from Chang'an International Airport every day, and most of them have various dreams. .
Dream!
This is precisely the most intuitive impression Nanyang gives to the outside world - here everyone has the opportunity to make their dreams come true. This has even become a label for Nanyang.
“This is Nanyang, it is really different from London.”
I walked out of the plane excitedly... no, I should have walked out. The boarding stairs turned into a boarding bridge. Even though it had already surprised the representatives from various countries in last year's Olympic Games, it was even specially reported by national TV stations. But for the passengers who set foot on the boarding bridge for the first time, it is still extremely fresh.
Among them is Hawking, who applied for an exchange student program at Nanyang University a few months ago. While studying at Oxford University, he easily passed the application, and this is how he became the current Chang'an. trip.
When passing through the customs, Hawking did not encounter any vicious customs officers - even in the British public opinion circles, there are two sides to the evaluation of Nanyang's customs. Some people say they are very kind, others say they are very friendly. Very vicious. Although the former is common, in universities, the latter is more preferred.
"Exchange student from Chang'an University?"
While the customs officer looked at the invitation letter, he also looked at the young people in front of him. Nanyang naturally welcomed such talents with both hands.
After just asking a few questions, I was released.
Everything went so smoothly. There is absolutely no accusation in some newspapers that Nanyang Customs will make things difficult for some people when entering the country.
He passed customs smoothly and walked out of the airport smoothly. However, he did not take a taxi to the city. Instead, he took the subway directly to Nanyang University - Nanyang's public transportation is very developed, and the infrastructure facilities before the Olympic Games Improvement, for Chang'an Metro, has been a comprehensive upgrade of facilities in the past few years. Not only have escalators been added to many stations, but they have also been extended to the airport and lead to Nanyang University in Genting Highlands by express rail.
In short, convenient public transportation makes travel easier for the public.
Sitting in the subway car, Hawking looked at the car curiously. Different from the old subway cars in London, the car here looked very new. The white interior even looked like a sci-fi future. feel.
In this way, the subway moved forward, and after ten minutes, it drove out of the underground. When the subway came to the surface, Hawking saw Chang'an, but it was not an urban area, but a series of continuous houses. When looking at those houses, Hawking leaned over and looked there.
In last year’s Olympic Games, people had already learned enough about the communities in Nanyang through television and other media, but for Hawking, who had just come to Nanyang, he was still very curious,
After all, as far as he knew, these houses were built after the war. The post-war period was the most difficult period in Britain. For Britain, where millions of houses were destroyed, the biggest problem for the Labor Party at that time was the need to provide those houses. However, Until they stepped down, they failed to provide enough houses, but here they have provided millions of houses to tens of millions of people.
“This is the power of industry!”
Looking at those neat and beautiful houses, Hawking thought of the introduction he had seen on TV: they use the production methods that are widely popular in the automobile manufacturing industry. , set up manufacturing workshops on the edge of the rainforest, use reclaimed rainforest wood to build houses, and then transport them to communities. A new residence is built every 16 minutes in all communities. A large number of "unskilled" workers are used, and from one house to another, each person only needs to perform one of 26 highly specialized steps to complete the entire assembly process. They use completely standardized materials produced directly from the factory.
In this way, relying on this standardized material, they provided tens of millions of houses in a short period of time. Since then, Nanyang-style life has become familiar to the world.
"This place is just like the United States..."
Hawking couldn't help but groan, Nanyang and the United States have many similarities - they are both countries of immigrants, both focus on machines and innovation, But this place is different from the United States, because most of the immigrants here are Tang people. Of course, there are also many European immigrants. For example, in this carriage, there are several Europeans of different ages.
The subway drove on the ground like this, and then entered the mountainous area. There were dense rainforests everywhere, and some wild animals seemed to be vaguely visible. After almost twenty minutes, the subway finally entered the station. ——Nanyang University.
This is the number one institution of higher learning in Asia, home to many world-renowned scholars. In the past few years, Nanyang University has been leading the development of world science.
After walking out of the station, I looked at the gate of Nanyang University across the road. This gate didn't look very conspicuous. According to some standards, it seemed a bit unworthy of the status of a university. In fact, Nanyang University has many gates, more than 20 gates, and each gate has exquisite carvings, both in Tang style and Western style. The towering teaching buildings and greenery on the campus complement each other, all of which highlight the It embodies the harmonious beauty of Eastern and Western classical and modern styles.
But at this moment, looking at this door, Hawking's mind came to the sentence he saw in a magazine:
"Some countries are in the opposite direction of human civilization. Some countries develop in the general direction of human civilization, and Nanyang is the country that promotes the development of human civilization.”
Nanyang is the country that promotes the development of human civilization!
It is the higher education in Nanyang that promotes the development of Nanyang, and Nanyang University is one of them.
Just as Hawking was sighing, a voice came from the side.
"How is it? Nanyang University..."
A young man stood beside him and said: "The only university in the world whose name is after the country!"
The young man wearing glasses was full of admiration when he spoke. Like Hawking, he also held a suitcase in his hand. He smiled at Hawking.
"My name is Cui Qi. I came to National Chung Hsing University to study as a graduate student. I majored in physics. What about you?"
"Stephen William Hawking, I am an exchange student from Cambridge to Nanyang, just like you. Physics. "
In this way, two young people from the East and the West introduced themselves in front of the subway station. When they were holding hands, a passerby in front of them happened to take a photo of their friend. This scene.
Although the two people in the photo are just passers-by who broke into the shot, what was recorded was a moment in history!
History, sometimes, always happens inadvertently and is witnessed, just when Cui Qi and Hawking walked into Nanyang University,
In the physics laboratory of Nanyang University, a brand-new atomic clock is also undergoing intense experiments. This is the world's first rubidium atomic clock.
Six years ago, the Royal Physical Laboratory of the United Kingdom successfully developed the first cesium beam atomic clock using cesium-133 atoms, the only stable isotope of the cesium element, ushering in a new era of practical atomic clocks.
The Physics Laboratory of Nanyang University immediately cooperated with it. From replicating the cesium beam atomic clock to developing the rubidium atomic clock, the research work in the physics laboratory has never stopped.
“If you want to install an atomic clock on a satellite and use time for navigation, you must use two atomic clocks. The long-term stability of the cesium atomic clock is better, and the error can be corrected for several days or even ten days. Rubidium The accuracy of the atomic clock is better than that of the cesium atomic clock in a short period of time, but the error needs to be corrected over time. Therefore, only through the cooperation of the two can the accuracy requirements be met..."
In the physics laboratory, As soon as Li Zhengdao finished speaking, someone said from the side.
"There is also a hydrogen atomic clock that can be used, and it has the common advantages of both."
Looking at the student who made the suggestion, Li Zhengdao said:
"You are right, The hydrogen atomic clock has the advantages of both, but its design is relatively complex and its application is difficult. We can use this as a research direction, but for now , Cesium atomic clocks and rubidium atomic clocks are the best choices.”
Three years ago, he had an in-depth exchange with Your Excellency on the plane to Stockholm. Your Excellency proposed the concept of satellite navigation and encouraged him to conduct research in this area. From that day on, he has been focusing on the research of atomic clocks and satellite navigation.
From the beginning of cooperating with the United Kingdom to research cesium atomic clocks, to independently developing rubidium atomic clocks, in the past three years, he, his assistants and the students he led have worked hard to gradually transform your work. Ideas become reality.
Although the transition from a theoretical physicist to applied physics research encountered many problems, he eventually overcame them. The atomic clock designed by the British was very large, equivalent to the size of a room, and was gradually reduced to a few hundred kilograms, equivalent to the size of a 180-liter refrigerator.
Compared with the bulky cesium atomic clock, the rubidium atomic clock is the simplest and most compact of all atomic clocks. This kind of clock uses rubidium gas in a glass chamber. When the surrounding microwave frequency is just right, it will change its light absorption rate according to the optical rubidium frequency
It is precisely because of its excellent performance that Li Zhengdao chose it as a breakthrough.
"The combination of the two may be a little heavier, but at least the problem of presence or absence can be solved first. Of course, the most important thing is that we must first verify the accuracy of this navigation."
There is definitely no problem conceptually. The only problem is navigation accuracy. If the accuracy can meet their expectations, then the history of human navigation will change dramatically from this moment on.
"Teacher, currently, the biggest problem with using satellite navigation is that it requires a lot of satellites. It needs to be composed of 24 satellites orbiting the earth. The satellites are about 17,000 kilometers away from the ground, and this means that their launch costs are very high. . Teacher, do you think the military will really support the launch of so many satellites to solve the navigation problem? "
There seems to be no other demand for such high-precision navigation except the military. .
Faced with the students’ doubts, Li Zhengdao thought for a moment and then said:
“For the military, knowing where you are at any time and anywhere is more attractive than any weapon. , they will definitely be willing to invest, and yes, navigation can be applied in many industries such as airplanes and ships. One day in the future, each of us will carry a portable satellite positioning receiver when we go out. When we arrive at a strange place, we can easily find where we want to go on the map based on the position displayed by the satellite positioning."
When he said these words, Li Zhengdao still had some questions in his heart. ——What should I do if I can’t recognize the map?
But this is exactly the application scenario of satellite positioning that you described to him, and he has never doubted it.
“As for the cost of launch, the Americans launched three satellites with one rocket last year. Wanhujiao must be studying similar technology. If successful, only 8 rockets will be needed to launch the satellite. 24 satellites were sent into space! ”< br>
After that, Li Zhengdao thought for a while and added:
“In short, let’s do the current work first, and the other things are not our consideration.”
(End of this chapter)