Chapter 77

Academician Ding continued: "I don't have" hardship "and" discipline "in my dictionary, only" interest "and" sense of achievement. ". Therefore, I don't limit your daily working hours and weekly working days. The pressure and motivation of learning come from your own inner driving force If you have any questions, you can ask me directly or your elder martial brother. "

After a pause, he asked, "by the way, what kind of research do you want to do? The space industry is just a big specialty, and there are many subdivisions in it. You can't learn everything you want to learn. "

Zhang Yuan thought about it seriously for a while. For a moment and a half, he was a bit at a loss. He was very interested in every direction.

While he was thinking, elder martial brother Zhao suddenly said, "if you don't have a complete understanding of the whole space industry, you can see it on the spaceship first, and then consider the direction. It's always right to lay a good foundation. "

"What's more, the current conditions of the laboratory are too poor, and there are very few resources. Any experiment needs to be queued up. I still recommend learning more basic knowledge. Unless you have a particularly good idea, you can do some projects or do some simulation experiments on the computer. I can help you with this... "

Now the gravity is simulated by centrifugal force. For some fine experiments, any point of Coriolis force is a nightmare.

Academician Ding nodded, "that's right. Zhao Qingfeng, when you are free, you can take him to the gravity free area outside. Well Just practice in the fusion engine room for a while. "

"The nuclear fusion engine is the most complex project so far. If you understand the whole workflow, you can basically graduate. "

Zhang Yuan's heart moved, ran to the outside of the gravity free zone to practice, he must be willing to.

The fusion engine of the earth age is the most advanced thing.

"That's right." Academician Ding added: "if you want to formally graduate, you should at least publish an article in a regional Journal of the earth. The current paper evaluation system of our new civilization has not been established, so we can only calculate according to the data on the earth, or let the experts in the industry generally recognize it. "

Just one paper

As if seeing Zhang Yuan's question, academician Ding said with a smile, "don't think it's very simple. If it wasn't for the poor laboratory conditions here, my requirements would be higher."

Zhang Yuan had a sudden whim, suddenly had a question: "if I have been unable to send out papers, how to do?"

Academician Ding laughed and said, "either apply for dropping out of school, or postpone graduation all the time. Be the first group of people to die in the starry sky."

……

Academician Ding is actually very busy.

Although the earth age has been tested for a long time, there are still many small problems exposed during the whole voyage. Some things need to be adjusted temporarily, so these big guys can't see one person all day long.

In the next few days, Zhang Yuan and his elder martial brother Zhao Qingfeng had more contact.

Zhao Qingfeng is an 18 level post, responsible for the maintenance of the material circulation system. In fact, he is also very busy, but the level of busyness is certainly lower than that of academician Ding, which can be seen every day at least.

"I see. The level of work is directly proportional to the level of busyness. My former second level post was a sweeper. You can be absent from work at will, but not you. "

Zhao Qingfeng said with a smile: "no, I don't need to manage here all day long. It's just that it's the beginning of the voyage and there are just a few more temporary adjustments. "

"Come on, I'll show you out!"

If a person whose work level is lower than level 10 wants to leave the living area, he must report to his superior and be accompanied by others.

"Verification passed, please pay attention to safety!"

One of the nurses suddenly said with a smile, "Mr. Zhang Yuan, please don't go out for more than 10 hours each time. Otherwise, excessive loss of calcium will lead to osteoporosis. You can go to the hospital and buy some calcium tablets. "

"OK, thank you for the reminder."

Another nurse said with a smile, "Wang Shuo, why do you have such a good service attitude today? Do you like him very much? "

"Where is it? I'm fine... "

Zhang Yuan's scalp is numb and he runs away quickly.

They put on their spacesuits and went to the elevator.

The elevator rises slowly. With the decrease of linear speed, the "gravity" Zhang Yuan feels is getting smaller and smaller. At the same time, there is a kind of dizziness standing in the "drum" of the washing machine.

Finally, when the elevator reached the axis of the spacecraft, all the vertigo disappeared, and they were completely weightless.

The two "swim" into a rail car with both hands and go to the air pressure valve.

There are several soldiers guarding these pressure doors, see Zhang Yuan two people, check the identity, salute.

"Drop ~ please pay attention to safety!"

Further outside is the vacuum.

The rail car moves slowly along the central axis to the first air pressure valve.Whew! It's a breath.

After the air in this small room is pumped out, it goes to the second air pressure valve.

The whole process of air extraction was carried out three times before the car successfully reached the outer vacuum area.

The most precious thing in the universe is matter. Human beings have no ability to create a complete vacuum, so it is inevitable that a small amount of material will be lost every time they go in and out.

However, as long as the lost material is within the acceptable range.

Along the way, Zhao Qingfeng kept introducing various facilities and equipment in gravity free areas.

"Do you know why there is no air in the weightless zone?"

Zhang Yuan thought: "the main purpose is to reduce the mass of the spacecraft."

Elder martial brother Zhao nodded: "yes, although the air density is low, it's a great number in total If the mass of the spaceship is as high as several billion tons, it is impossible to accelerate to seven thousandths of the speed of light. If you think about it, the total mass of our 500000 people is only 30000 tons, which is many orders of magnitude different. "

The interior of the cabin was empty, with dim lights. Brother Zhao's finger pointed out the window. "As for those complicated pipes, they are actually the heat dissipating devices of the spaceship. The heat generated in the living area is brought to the outside through these condensing devices, and then circulates through the radiation sail on the outer surface of the spaceship."

Although the average temperature in space is more than 200 degrees below zero, there is no matter exchange, and the heat dissipation is extremely slow. We can only dissipate heat by radiation.

As an important part of the ecosystem, heat dissipation is the top priority of the spacecraft.

Elder martial brother Zhao said slowly: "in fact, the current carrying capacity of our spaceship is not enough to carry 500000 people."

Zhang Yuan was stunned in his heart. They are half a million people. Don't they live well?