From small town scholar to chief scientist

Chapter 341 New Directions
Seeing Zhou Yi asked, Sun Song directly printed out the list compiled today, and said:

"Academician Zhou, everyone is on this list, including Bill Carr, the 18-year Fields Medal winner,
There are other bigwigs in the field of number theory or algebra, and Xiao Wanyi will also join.

And Fields Medalist Effie Germanov, who works at SUSTech, will also join in the compilation. "

Zhou Yi said:

"They all have good achievements in the field of algebra. Three Fields Medal winners, plus Maynard, Donaldson and me, there are six Fields Medal winners who compiled this textbook.
I feel that except for very few colleges and universities, it is difficult to have such a terrifying power.

Moreover, there are quite a few people in Chongqing Higher Academy who have made good achievements in the field of algebra. "

Sun Song said:

"Yes, this is a huge force, and Mizuki University will support us,

Professor Effie Germanov solved the Burnside conjecture, which is the oldest and most influential problem in finite group theory.

It was for this question that he won the Fields Medal in 1994. "

Zhou Yi nodded, it was only one afternoon and one evening, so it was already very good to have so many people participating.

At least it can be compiled before other colleges and universities.

Sun Song continued:

"Actually, if our deadline is the day after tomorrow, perhaps more people will participate. That way the confidence will be greater."

Zhou Yi shook his head and said:
"No, in fact, the important thing is not to compile teaching materials, but to complete this work. The current manpower is enough.

If you count the people from Shuimu University and Chinese Academy of Sciences, there is no more luxurious lineup than ours. "

Sun Song said:

"Okay, I'll announce the news tomorrow."

Zhou Yi said:

"Actually, it can be announced now. I have time tomorrow, the day after tomorrow, and the day after tomorrow.
Because the experiment on the controllable nuclear fusion side has been completed, and the data is being processed. "

Sun Song said:

"Then today, April 4th, then hold a big meeting on April 5th?
Two days in a row? "

Zhou Yi nodded and said:
"It takes almost two days to figure out a context.

That's it, I'll leave first, and you should rest early. "

"Okay, Academician Zhou."

Sun Song said.

Zhou Yi nodded and left directly.
If Qiu Chengtong's support is counted, then the Chongqing Higher Education Institute is equivalent to having 7 Fields Medal winners participating in the compilation of this new textbook.

Paris Ecole Normale Supérieure has only produced about 10 Fields Medal winners.

Even if Saier and others were there, Zhou Yi felt that the power in his hands did not belong to them at all.

And also stopped the corresponding board of their scientific research assistant,

On my side, there are mostly young people, who can stay up late and work hard, so there is no reason to be slower than others.

Sun Song quickly announced the results on the scientific research assistant with the official account.

Including Qiu Chengtong, a total of 7 Fields Medal winners participated in this matter,
Secondly, there are many mathematics academicians from the Great Xia Kingdom joining, and the gorgeous lineup can be described as eye-catching.

People who eat melons have commented below.

[By the way, there are not many such luxurious lineups in the world, right? 】

[Hey, brother Meng, my mentor was lucky to be selected, and I won't be back for at least half a year, so I'm relieved.Ha ha ha ha. 】

[Don't be complacent upstairs, you have a little guide. 】

[This can be selected, high and low are academician students, right? 】

[It’s rare for Daxia to write a book. It’s still about mathematics. You must work hard. You can’t let other countries take the lead. The leadership in mathematics starts from these aspects! 】

The comment section is buzzing.

In the next two days, Zhou Yi, Academician Li and others will process the data together, and wait for the arrival of Shuimu University, Germanov, Chinese Academy of Sciences and others by the way.

Germanov is a Tsarist, to be precise, a former Tsarist,

Only after the split of the current Tsarist-Russian alliance did they go to the ugly country.

Now Daxia Kingdom is one of the few independent countries, and SUSTech paid a lot of money to hire, so it joined Daxia Kingdom.

Otherwise, he would not join the Great Xia Kingdom.

In the next few days, all the selected professors and academicians from various universities arrived.

Although they can only leave a name on the leftovers of the textbook, or a name on a theorem,

But it's much better than before.

It was not certain whether I could leave my name on a majestic unified textbook before,
Now is an excellent opportunity, not to mention Zhou Yi is playing with him.

In two days, Zhou Yi barely figured out the context,
The rest of the directions will be resolved by Xiao Wanyi and the others.

Six Fields Medal winners gathered in Chongqing Higher Court, and the lineup was gorgeous.

Zhou Yi's daily working time is also divided into two halves, one half for textbook compilation, and the other half for controllable nuclear fusion.

But the progress of controllable nuclear fusion is not as smooth as Zhou Yi expected.

In the laboratory, everyone looked very frustrated.

It is obviously unacceptable that the results in the past five months should be like this.

Academician Li whispered to Zhou Yihui:
"Academician Zhou, due to the extremely high thermal stress of the sample during the LPBF process and the intrinsic brittleness of tungsten,
This makes tungsten produce more microcracks in the LPBF process.

This is the result of our experimental observation, you have a look. "

After speaking, Academician Li motioned Zhou Yi to go and have a look.

Zhou Yi also clearly saw the result.

On the xy plane perpendicular to the additive direction, there are more cracks in the longitudinal and transverse directions.

On the xz plane parallel to the additive direction, the crack propagates along the additive direction.

This is undoubtedly a bad result.

Academician Li said:
"In order to reveal the differences in the microstructure of LPBF tungsten samples in different directions,

We performed EBSD characterization on the xy plane and the xz plane.

The result was also unsatisfactory. "

Zhou Yi said:

"Show me the results of the experiment, and I'll think of a way later. We didn't think it would go well at the beginning.
If it goes well, it will not become a legacy problem. "

After a while, a stack of printed materials on A4 paper was delivered to Zhou Yi.

Zhou Yi sat on the stool and looked carefully.

The graphic is very vivid, it should be taken from the original screenshot.

The different colors in the inverse pole diagrams of the xy plane and the xz plane represent the orientation of each grain, and the black represents the unmarked area caused by the crack.

While watching Zhouyi, Academician Li also said:
"It can be seen from the grain morphology of the two cross-sections that LPBF pure tungsten is composed of columnar crystals whose long axis direction is parallel to the additive direction.

The grain size observed on the xy plane perpendicular to the additive direction is smaller than that observed on the xz plane parallel to the additive direction. "

Grain?distributed?
Combinations and infinite sorts?

A hint of inspiration flashed in Zhou Yi's mind,

Isn't this just a matter of stacking balls?
Similar to the original Kepler conjecture?

Zhou Yi froze there for a while, inspiration began to stack up with memories,
Maybe it's an idea.

Academician Li on the side saw Zhou Yi stunned, and couldn't help shouting in a low voice:
"Academician Zhou?"

Only then did Zhou Yi wake up,
Said:

"In fact, it is far more than that, and there are results that you haven't seen,
The distribution of grain boundaries is also different. Our experiment was a trial and error.
But I do have some ideas. "

I have another idea! ?

Everyone was surprised, how fast it was, and they had another idea.

Do you want to be so scary.

Although this experiment failed, the accumulated experience is self-evident, and this road can be dug deeper, maybe it will be done.

I saw Zhou Yi said:

"I just don't know if it can work, and I may have to continue to try and make mistakes."

Professor Chen on the side said:
"The essence of scientific research is trial and error. We are not ordinary people. We have enough funds and time for trial and error.

Ordinary trial and error can only pay the cost of time. "

Zhou Yi said:

"That's right, and we didn't get nothing.

From the density and thermal conductivity measurements of samples with different forming directions, we also know the data and the direction to choose in the future.

其中水平增材样品密度为18.64 g/cm^3，致密度96.3%；竖直增材样品密度为18.71g/cm^3，致密度96.7%。可以看出，不同的增材方向对最终成形样品的致密度影响较小。

Therefore, the cause of the density direction is ruled out. "

Everyone thought about it, and it was the same reason.Zhou Yi continued to say:
"From the perspective of thermal conductivity, the thermal conductivity along the additive direction is higher than that in the vertical additive direction at any temperature, and at high temperatures (> 800°C), the thermal conductivity in the vertical additive direction The conductivity decay rate is significantly accelerated."

"Then us?"

Zhou Yi said:

"No, although horizontal additive materials are fast, there are also many cracks. I have to think about it slowly. Although the results of this experiment failed, the accumulated experience has laid the foundation for our success."

Zhouyi has failed many times in the application for so long, but the price paid this time is a bit high,

Because of the time cost, it took nearly five months.

"It will take a month at most, and maybe we will be half a step ahead of the world and achieve phased success."

Zhou Yi said in a deep voice.

The crowd excitedly said:

"Okay. Shall we continue then?"

Zhou Yi said:

"Everyone take a few days off for the time being. Since the Chinese New Year has been busy until now, there is no holiday. Let's take a few days off first.
Wait for me to study the theory for a few days before continuing. "

It's okay to fail once or twice. If you fail several times, it will not only affect the morale of the army, but also affect Zhouyi's own authority.

So this time Zhouyi is going to perfect the theory again,
The previous theory can only be used partially, but fortunately, failure is not nothing.

At least the future selection method is clear.

According to the experiment, under the high thermal load of 15MW/m^2, the surface of the vertical additive sample has obvious melting and splashing, and the surface of the horizontal additive sample has secondary cracking and a little splashing.

For horizontal additive samples, since the heat flow direction is parallel to the additive direction, the thermal conductivity is higher, which is more conducive to heat conduction.

The benefits of horizontal additive are straightforward.

Moreover, for vertical additive samples, the heat flow direction is perpendicular to the additive direction, the thermal conductivity is small, and the heat is difficult to transfer, resulting in surface heat accumulation and melting phenomenon.

Therefore, for the forming of the mono-block of the divertor in the future, Zhouyi must give priority to the forming of the horizontal additive method in the future.

After Zhou Yi left the laboratory, he returned to his office and began to ponder.

It is definitely not enough to use only commercial tungsten powder. Other materials must be added and combined in a special arrangement to overcome the disadvantages of horizontal additives.

What exactly is it, Zhou Yi has a general idea.

Adding diamond to make a composite material of diamond film and tungsten may meet the ideal requirements.

After Zhou Yi thought it through, he rubbed his head and thought it was very feasible.

Just need to improve the specific content.

This is closely related to plasma physics.

Zhou Yi can be regarded as a top figure in the world in this direction.

Using the system to redeem points can certainly shorten the cycle, but points are getting harder and harder to earn, so save a little if you can.

Zhou Yi guessed that this key technology alone would require at least 6000-8000 points.

Zhou Yi was about to give it a try, and said silently to the system:
"System, how many points do you need to exchange for high heat load material technology?"

The cold voice of the system sounded in Zhou Yi's mind.

"Ten thousand points."

Ten thousand points?
I am special! ?

However, this is the preferred plasma-oriented material for Tokamak fusion reactors, and it is one of the three main aspects that will determine the application in the future.

The high scores are understandable.

Zhou Yi thought about it again, and said:
"How many integrals are needed to evaluate the composite material performance of diamond thin film and tungsten?"

The system's icy voice said:
"3000 points."

Zhou Yi: . .

Trial and error in the past few months is equivalent to earning thousands of points, and what Zhou Yi exchanged was not all the skills, but the evaluation.

This evaluation can cost money and time to do by yourself, so Zhou Yi doesn't want to spend extra points to redeem.

There are still many perfect technologies needed for controllable nuclear fusion.

If you can save, you can save, and there will be more technologies in the future. If they are used up in the direction of controllable nuclear fusion, it will be inconvenient in the future.

In the next few days, Zhou Yi was perfecting his ideas, enriching the theory, and then experimenting.

In terms of theory, Zhouyi can also let them conduct numerical analysis first, and verify the rationality first.

Finally start experimenting.

The money spent on experiments can also be saved.

The next day, Zhou Yi went to the Institute of Mathematics in the morning to compile a book on the unity of algebra and number theory together.

As for the title of the book, it has not been determined yet, and when all the work is done,
You can determine the name.

The morning passed quickly, and when we were eating together at noon,
Maynard said to Zhou Yi:

"Zhou~. Tell you some bad news."

Zhou Yi wondered:
"What bad news?"

Maynard said:
"Some mathematicians in Europe have joined together to prepare textbooks on the unified direction of algebra and number theory, and we must hurry up.

Otherwise, it is likely to be preempted by them. "

Zhou Yi: . .

"How do you know it?"

Zhou Yi asked.

Maynard said with a face of loyalty:

"They notified me and asked me to go back, but I refused. Then they wanted me to tell them our progress, but I still refused.

Zhou~, do you think I am loyal enough? "

Hearing this, Zhou Yi was silent for a while and said:
"You must be loyal enough, but the European side is too hateful."

"Actually, it's not only Europe, but Ugly Country is more radical. The math center is in Ugly Country, and they don't even want the math center to be transferred to Great Xia Country.

So the most anxious thing is Ugly Country. "

Zhou Yi said:

"Okay, I'll also secretly go to ask about the progress of Ugly Country, and spend more time on this matter every day, and the controllable nuclear fusion will be a little slower."

Controlled nuclear fusion has a new direction, and there is no rush to do the most important thing first.

PS: I’m still coding when I’m in the hospital, please call me a model worker author!
(End of this chapter)