Deep Space Fleet

Brother Zhao asked with a touch of interest, "Any good ideas?"

"Not yet, just want to know."

Zhang Yuan didn't dare to say that he wanted to directly challenge the problems of this century, and the province's ordinary people ridiculed him ... Even if in general, Brother Zhao would not laugh at him, he would only advise him not to do such a big problem.

Soon, two days passed by ...

The spacecraft has successfully turned, the main engine shut down suddenly, and enters a short-term maintenance state.

人造 The artificial light source from Europa shines on the light sail, letting the entire mother ship enter into a slow deceleration.

Light Road, a great technology.

Because of this technology, small spacecraft can quickly travel between the moon and Jupiter without having to carry a lot of fuel. In the past, at least half of the payload of the spacecraft, which traveled from the moon to Jupiter, was used for fuel. But now it ’s no longer needed. Small spacecrafts with hundreds or thousands of tons can reach Jupiter from the moon in just one month. This is a huge improvement.

Zhang Yuan witnessed the process of slowly extinguishing the main engine.

Rhenium is as if a pot of hot water has been poured out. Without sufficient temperature, the plasma light gradually goes out, and the nuclear fusion reaction automatically stops.

From this perspective, the fusion engine is still quite safe. It will not explode, and will only extinguish when the reaction conditions are insufficient.

In the engine room of the Earth Age, there is only one auxiliary engine and two molten salt reactors providing basic electrical power.

The plutonium molten salt reactor is a nuclear fission value-added reactor that helps humans through a long "gray age". The technology is quite mature, so it is usually used as a backup energy source. For vital spacecraft safety, it is impossible to pin hopes on a single fusion energy source.

In the following period, related technicians will also perform a series of maintenance on the entire engine.

的 The internship of the entire engine room has temporarily ended ...

Zhang Yuan went back to the living area a little at a loss.

He can take a few days off for a break, and then go to work at a nuclear power plant. There isn't much to do anyway, and he is going to stay at home and read a dissertation.

Well, for turbulence, after reading the literature for a few days, he had no idea, after all, it is a world-class problem ...

六 At 6 pm, a small dinner is being held in the "big bucket restaurant" in Area A.

Even if Academician Pu Ding is busy again, he will take a little time at the beginning of each month to invite everyone to have a meal and take care of the situation of several disciples by the way.

"Are you trying to do turbulence?"

"I just want to know ..." Zhang Yuan said honestly to his teacher.

Tong Dingzhaodong smiled, perhaps because he remembered his youthful rashness and did not hit the young disciple.

"It is indeed a very difficult problem. Many people have studied it for more than ten years, and they have not been able to write particularly good articles. It is a waste of time. If you want to write in this area, you must be mentally prepared. "

"If you don't understand anything in mathematics, you can ask Brother Luo Wenhao or come to me directly."

Brother Luo, who is sitting on the side, is almost forty years old and has already graduated with a PhD. He is usually busy with work and rarely attends such parties.

Zhang Zhangyuan was the first time to see him.

Brother Milo is a big man, engaged in research in the field of information. However, his direction was biased towards mathematics, and he was quite famous in the study of positive curvature, solving two well-known Hopf conjectures.

Why two? Because Hopf's conjecture originally has multiple, one is "there is no normal cross-section curvature measure on S ^ 2XS ^ 2", and the other is: "Eulerian explicit numbers of even-dimensional positive curvature manifolds are positive.

With two conjectures, he could have won two big prizes, but he was dealt with by himself.

Zhang Yuan apologized in homage, producing a desire to hug his thighs.

"Brother Luo!"

"Turbulence, haha, ambitious! I like making friends with these young people who have ideals. I have also studied this before."

There is also Mrs. Luo's wife, a female mathematician in her thirties, dressed elegantly, with a special Victorian flavor.

"Hello. Are you classmate Zhang with 300 kilograms of gold?"

远 Zhang Yuan said with a smile, "Ms. Mo, don't make a joke, in fact, I prefer to have 300 kilograms of antimatter, which can be used for experiments."

"Really? The price of antimatter is too expensive ... You have a high reputation among the girls in our F area! Would you like me to introduce you?"

Zhang Yuan could not help but feel a little embarrassed. "Girls in the country of Lan, there are already a few to choose from in my address book ..."

Everyone laughed.

的 The atmosphere at the entire dining table was very relaxed. The guys first talked about personal development in the near-end time, and then talked about some academic gossip news, which was quite interesting.

Including what mathematical problems someone has proved; new breakthroughs in condensed matter physics; the well-known "Modern Science" journal, because of the problem of academic corruption, and its influence plummeted.

"There are more and more people with depression. If they are diagnosed, they will get off the spacecraft in Europa and return to Earth."

"This way ..."

"The publication of" Modern Science "has been temporarily suspended. Several reviewing editors have been checked, and they have submitted contributions there before ... I did not expect this to happen."

"Academic corruption can happen everywhere. It's also difficult to avoid altogether ... it depends on the human environment to restrict it."

Zhang Yuan was shocked. The impact of this journal has plummeted, and it has nothing to do with what happened to him?

However, ~ www.readwn.com ~ found that everyone did not focus on him, so they gradually let go.

After the dinner was over, Zhang Yuan discussed a few words with new Luo.

"The problem of turbulence, mainly the direction of non-uniform turbulence. After I read the paper, the first time I thought of Fourier analysis and related integral transformation. I later found that it was not right ..."

This is his intuitive idea.

"Fourier analysis is too ordinary." Brother Luo laughed: "I thought about it at the time, but later found that the gadget is only suitable for uniform turbulence. Even if it is done, the fitting effect will not be very good, it is not of much significance. . "

Zhang Yuan agreed: "It would be nice if it was taken as a test question in a test paper."

Brother Luo patted his head and seemed to think of something. "It's not easy to use pure numbers. If it is a direct numerical calculation, I have seen a good idea, using LES and non-equilibrium and equilibrium walls, respectively. function……"

"The effect on the calculation of each parameter of the wall under three different meshing conditions, and comparison with the corresponding DNS results ... This is a relatively innovative algorithm in recent years, but in actual application, compared with you My father's algorithm is a bit worse. "

Zhang Yuan suddenly flashed, as if he grasped something, "Grid division?"

那么 "So, can we divide the whole observations into a certain type of community division, and first break down the big problem into small problems ..."

"Society?"

Brother Luo paused for a moment, "But in the end you still have to merge the whole question back, otherwise all the data will be meaningless. What is the method of division and merge?"

这个 "This ... I haven't figured it out yet."