The military-industrial scientific research system of the academic master.

After seeing Li Yabo off, Chang Haonan regained his good attitude and started checking his emails again while enjoying the warm sunshine of early spring.

Now, almost a year has passed since he and Perelman published the paper proving the Poincare conjecture.

The heat of this matter has cooled down a lot.

However, the term "heat" ultimately refers to the media.

Although there is a saying and phenomenon in the academic community that pursues hot research directions, its significance is limited unless it is in fields such as biology or materials that can produce results relatively quickly.

So overall it is still quite restrained.

On the other hand, compared to Perelman, who has almost completely disappeared, there have been some traces of Chang Haonan in the past year.

Therefore, there are still many institutions, scholars or students who send emails to this mailbox.

In fact, this also includes Perelman himself.

Although he was basically missing in the eyes of outsiders, his contact with Chang Haonan had never been cut off.

In addition to exchanging some mathematical inspirations as usual, perhaps because they had already realized their long-cherished wish of solving the Poincare conjecture, the content of the emails between the two also contained a lot of content that was not related to research:

Music, life, art, literature and even philosophy.

Perelman is indeed a genius in the literal sense, and he has some knowledge in all these fields.

Although Chang Haonan is not a professional, he has experienced the Internet era after all, so there is no big problem for him to be a listener and a supporting actor.

In short, they acted like old friends.

Through these daily email exchanges, Chang Haonan also learned a lot about the other party indirectly.

As a Jew, some of Perelman's relatives chose to immigrate to the Kingdom of David after the collapse of the Soviet Union, but he himself chose to stay in Russia with his mother after traveling around the West.

Perhaps this is one of the reasons why the other party is usually taciturn.

For example, right now, Chang Haonan’s mailbox contains an email he received last week, asking him if he knows how to remove the fishy smell from fish soup…

Of course, not all emails contain such life-like content.

Maryam Mirzakhani, who had previously contacted him to express her desire to come to Torch Lab for graduate studies but was rejected, sent another email nearly a year later.

She first said that she had switched from a master's degree to a doctorate at Harvard University, and thanked Chang Haonan for his encouragement and support last year.

Then, he asked Chang Haonan about the feasibility of a research route, that is, whether it is possible to reversely use the idea of ​​the proof process of the Poincare conjecture to project the interface tracked in three-dimensional or two-dimensional space into a higher-dimensional space for processing.

Regarding Maryam Mirzakhani, when she first sent him an email, Chang Haonan didn't take it too seriously.

However, he later vaguely remembered that this person seemed to be the first female mathematician to win the Fields Medal in her previous life.

And the research direction seems to be geometry.

"I hope I have diverted your research interests..."

Chang Haonan looked at the contents of the email and thought helplessly.

Even if they are all geniuses in the field of mathematics, different people may have different specific talents.

Just because Mirzakhani has made outstanding achievements in the fields of hyperbolic geometry and symplectic geometry does not mean that she can achieve the same level in another direction.

But no matter what.

Since others asked the question sincerely, Chang Haonan didn't mind answering it.

After all, firstly, he was free, and secondly...

This question is really his specialty.

It not only refers to topology, but also includes the numerical calculation methods that he had studied earlier.

[Regarding this type of solution, you can try to learn about the level set method in the field of applied mathematics. In the numerical simulation of multiphase interfaces, this method is often used to circumvent the parameterization process and directly calculate the time-varying curves or surfaces on the Cartesian grid. However, from the perspective of theoretical mathematics, this method still has the problem of non-conservation...]

At the beginning, Chang Haonan just wanted to give the other party a brief introduction to the level set method itself, as well as some ideas for solving non-conservation problems in some engineering fields, such as velocity reconstruction of the level set method.

But as he wrote, he actually had some ideas.

So he immediately stopped typing, took out a piece of draft paper, and started to calculate step by step.

……

However, the peaceful times did not last long.

Just when Chang Haonan felt a pang of hunger in his stomach, he decided to go to the cafeteria to get some cumin duck legs for dinner.

The phone on his desk suddenly rang.

It's the white one.

This made Chang Haonan, whose nerves were suddenly tense, feel a little relieved.

External call.

It's usually not something particularly fatal.

After calming himself down, Chang Haonan picked up the phone.

"Professor Chang, how are you?"

Yuan Xiangya's voice came from the other side.

"Dean Yuan?"

Chang Haonan's brain worked rapidly and he quickly guessed the purpose of the other party calling him.

In the period just after the Poincare conjecture was proved, he suggested to Yuan Xiangya that he could establish a comprehensive natural science journal like Science or Nature as a benchmark and representative of Chinese academic journals.

The other party also invited him to serve as the editor-in-chief of the journal.

Today's phone call is most likely about this matter.

"Has your journal been prepared?"

"Professor Chang, this is a bit too formal, isn't it?"

Yuan Xiangya's words were accompanied by an unstoppable smile:

"You are the editor-in-chief of the Journal of the Chinese Academy of Sciences. To be honest, this is also the journal for all of us..."

“Can you tell me more about the journal?”

Chang Haonan did not continue with the polite conversation, but went straight to the point.

The main reason was that he was indeed a little hungry.

There is no large-scale takeout industry these days, so if you ask someone to get your food, it will basically be gone when you come back.

"of course."

Yuan Xiangya replied:

"It has been tentatively confirmed that the journal will be published quarterly, with both paper and electronic versions published simultaneously. In principle, submissions in both Chinese and English will be accepted, but only the English version will be published regularly, and the Chinese version may be published irregularly in the form of a special issue."

"The editorial department operates independently from the institutes of the Academy of Sciences and is only responsible to the General Assembly of Academicians and the Presidium of the Academic Departments..."

"..."

It can be seen that in order to avoid some malpractices in the academic circle as much as possible, the Academy of Sciences has set a very high level of independent authority for the JCAS journal.

Plus there is Chang Haonan, the “external” editor-in-chief.

It can be said that a lot of effort was put in.

Considering that establishing China's own academic system was one of Chang Haonan's goals, he naturally had no reason to refuse this job.

Therefore, after listening to Yuan Xiangya's introduction, Chang Haonan immediately asked:

"Then Dean Yuan, when do you plan to publish the first issue of this JCAS journal?"

Before officially taking office, he always has to know when the DDL of the task is.

"The first phase is in the third quarter of 2001, and the plan is to be between the end of June and the end of August. Of course, the specific time depends on your work schedule. If the commissioning process goes smoothly, it is not impossible to be earlier..."

With the gradual promotion of electronic journals, the publication dates of major publishing houses are getting earlier and earlier.

Many monthly magazines are even released 4-6 months in advance.

In comparison, JCAS only published the third quarter in June, which is considered to be relatively slow.

"Also, Professor Chang."

Seeing that Chang Haonan did not reply immediately, after a brief pause, Yuan Xiangya continued:

"After all, we are a brand new journal, and this first issue... must be a great success, so, can you please..."

Today, Chang Haonan's name is still somewhat well-known in the international academic community.

If he were just the editor-in-chief, it might not attract much attention.

But if he published an article as the first author a year later, it would definitely be big news.

"Is this..."

Chang Haonan wanted to say that he needed to think about what to write before replying, but at this moment, out of the corner of his eye he saw the several sheets of draft paper on the table that he had just filled with writing.

"Sure, I have a fairly mature idea on hand, and it should be completed soon."

He answered decisively.

Yuan Xiangya was overjoyed:

"Then we will wait for good news from Professor Chang..."

"..."

After hanging up the phone, Chang Haonan took off his coat and sat back in his chair.

He first called Yao Mengna and asked her to bring him dinner.

Next, I opened a new Word document and typed in the title of the paper I had just thought of:

A conservative level set method for two phase flow.