Chapter 737 Graduation defense with outrageous lineup


Chapter 737: Graduation Defense with Outrageous Lineup

Chang Haonan’s defense meeting was not arranged within Beijing Hang University.

Instead, we directly found a conference room in Torch Group for the meeting.

Because what is going to happen in a while is far more than just a thesis defense.

Conducting a doctoral defense for the general manager of another company on someone else's territory is probably relatively rare even in the degree-granting process around the world.

But compared with Chang Haonan's own situation, it doesn't seem that rare...

"Xiao Chang, long time no see."

Has been promoted to acting principal at a speed close to the triple jump Tang Lintian stopped Chang Haonan at the door of the building:

“After today, I won’t have the chance to call you that again.”

“Principal Tang, I just graduated. There are plenty of opportunities to meet..."

Chang Haonan turned his head and saw three other people behind him.

Du Yishan and Liu Zhenxiang are naturally on the list.

But the person standing at the end is an unfamiliar face. He should be a teacher from a foreign school invited here according to the requirements of the review mechanism.

As for Fang Zhen, who was a review expert during Chang Haonan’s undergraduate defense...

Considering that he is currently working in Torch Group and is considered a subordinate of the former, according to the principle of avoidance, regardless of It's impossible to get involved no matter what.

Perhaps seeing Chang Haonan's slightly confused look, Du Yishan motioned to everyone to make room for that person, and then introduced:

"Xiao Chang, this is the Institute of Mathematics and Systems Science of the Chinese Academy of Sciences. Vice President, Professor Yuan Xiangya.”

Hearing this name, Chang Haonan suddenly understood.

Although the other party's face was relatively unfamiliar, Chang Haonan had heard of Yuan Xiangya's name.

In fact, if you want to study the theory of nonlinear programming algorithms, it is basically impossible to avoid him.

In 1985, 25-year-old Yuan Xiangya jointly proved the "1/2 conjecture" of the truncated conjugate gradient method while studying for his PhD, which was regarded as one of the important achievements in nonlinear programming algorithm theory throughout the 1980s.

In addition, he also systematically proposed a series of new algorithms using a combination of trust region methods and traditional line search methods to solve nonlinear planning problems.

Some people have even begun to call this series of results "Yuan's Lemma".

Although this term has not yet been widely accepted, judging from the current momentum, it will be a matter of time.

Although a lemma in a non-explicit academic field is definitely not as influential and status as those famous theorems, there is no doubt that being able to put one's name on it is definitely considered a standing start. reached the pinnacle in the field of applied mathematics.

In short, he is also a player who can be compared to cheating.

Chang Haonan took two steps forward and shook hands with the other party:

"Professor Yuan, I am honored that you can come to participate in my graduation defense. During my previous research process, your The research methods and results have given me great inspiration.”

Yuan Xiangya is not yet forty years old. Standing among several people, he is closer to Chang Haonan’s age.

“Learn from each other, learn from each other.”

The other party smiled modestly:

“TORCHMultiphysics software, and of course the algorithm behind the software, can be said to be the greatest achievement in the field of computational mathematics at the application level in recent years.”

“ Apart from anything else, when we who are engaged in applied mathematics go to meetings now, we can speak very forcefully..."

Although this statement is a bit exaggerated, the atmosphere in the corridor has become more relaxed because of it. .

“Actually, if your defense is held in public, I will definitely ask half of my students to come and participate.”

"Not all of them?"

Du Yishan, who was standing next to him, interjected and asked jokingly.

But Yuan Xiangya shook his head very solemnly:

"Not all, because the other half can't understand it even if they come over, so there is no need to waste time, it is better to leave the position to more People who need it..."

After saying this, even Chang Haonan himself almost laughed out loud.

But considering that I was still a student today, I finally held back.

After some pleasantries, Chang Haonan was ready to take everyone upstairs.

It was only then that he suddenly realized that there were only four people here.

"Teacher Du, the graduation review should have at least five review members. Are we... still missing one?"

"Don't worry, we are almost there."
< br>

Du Yishan raised his wrist and looked at his watch:

"The old man is older. We arranged for a special person to pick him up in a special car, so he was not with us."

"He is older..."

You must know that Du Yishan is already 70 years old. The only people he can say are old are the old-timers from the early founding of the People's Republic of China...

He was just beginning to guess who the visitor might be. When I arrived, I saw a minibus slowly driving into the company compound from the direction of the gate. Then it made a half circle and drove straight from the side vehicle ramp to the few people waiting here.

When the car door opened, the first people to get out were naturally a few staff members.

But soon, a gray-haired old man wearing a Chinese tunic suit appeared at the door of the car.

?

Chang Haonan was stunned for a moment.

No introduction is needed at all.

He's been seen countless times on television and in the media.

"Mr. Qian..."

A few people rushed to greet him.

In front of this master of aerodynamics in applied mechanics and the founder of engineering cybernetics, no matter whether he is in his seventies, thirty or twenty, he is still a junior.

After shaking hands one by one, Mr. Qian finally came to Chang Haonan:

"A few years ago, I heard the juniors at the Academy of Sciences talking about you, and this time I saw your true form."

Although he is already 90 years old, Mr. Qian is very active both in his words and in his thinking. It's still relatively smooth, and my physique doesn't look too old. "Xiao Chang, Mr. Qian took the initiative to apply to be the chairman of your defense committee this time."

When Mr. Qian finished speaking, Du Yishan added beside him.

“Thank you Mr. Qian!”

In this situation, Chang Haonan really has nothing else to say:

"It's a bit windy outside, let's go in and talk first..."

In fact, Chang Haonan, a member of the defense committee, The composition, the meaning is already obvious.

The so-called review is mainly to examine whether the research results that match the requirements of a "doctoral degree" have been produced during the degree study.

But this is for ordinary people.

The achievements of Chang Haonan during his Ph.D. studies have been placed in factories or flown to the sky, and there is no need to express them in papers.

Therefore, the focus of this defense committee is not on the defense itself, but on the fact that the members must have enough influence——

Not everyone is qualified to award Chang Haonan a degree. .

If an ordinary PhD supervisor were to sign Chang Haonan’s review opinion, wouldn’t his hands be shaking?

Besides, the presentation is not enough.

As for the current lineup, Du Yishan and Qian Lao, two academicians of both academies, Liu Zhenxiang, the first academician in the aviation power industry, Tang Lintian, the president of Beijing Airlines, who is probably not far away from being an academician, and one of the top young scholars in the field of applied mathematics in China, who is also not far away from being an academician. Yuan Xiangya, who is barely qualified...

Basically, they are already the strongest team that the Chinese academic community can pull out.

......

Half an hour later, Chang Haonan, dressed in formal attire, walked behind the podium.

Other staff have been excluded from this conference room.

Therefore, there were only Chang Haonan standing, five giants sitting, and a trembling defense secretary in the room.

If it were anyone else, facing such a luxurious lineup, I am afraid that he might not even be able to stand firm.

However, Chang Haonan has seen a lot after all. Although he was a little stressed by Mr. Qian at first, he quickly adjusted his mood.

“Thank you all teachers for coming today and listening to my report on some of the results I have achieved during the two years of my doctoral studies.”

“My speech will be divided into two parts, one It is a new algorithm that uses the space-time separation method to solve nonlinear partial differential equations. The second is the calculation tool TORCHMultiphysics, which is expanded based on this algorithm, and examples of using this tool to solve practical problems. ”

"Every teacher should have read and used the content of my paper, as well as the TORC Multiphysics software itself. Therefore, I will omit some less important steps to save space and time..."

"..."

"First of all, I need to introduce a principal component analysis method for nonlinear autonomous dynamic systems..."

In the 1990s, laser pointers had not yet been widely used. to the field of display and teaching, so Chang Haonan still held a traditional telescopic pointer in his hand and wandered around the curtain as he introduced:

"Assume that there are high-dimensional nonlinear ordinary differential equations Autonomous system x(t)=f(x(t),t), where state x(t)=[x1(t),x2(t)xn(t)]^T, this equation expresses the The dynamic behavior of state x(t) in n-dimensional state space under the premise of input..."

From an academic level, the algorithm construction in the first one-third of the article is actually the core content, because it is the cornerstone of all subsequent work.

As a listener, this part of the content process also requires the most energy.

If this is a normal review, then if you want to find fault, it will most likely be in this part.

But things are different today.

The powerful performance of TORCH Multiphysics has been recognized by peers around the world.

If you find any problems with the algorithm constructed by Chang Haonan...

It is best to find your own problems first...

In fact, Yuan Xiangya, who is closest to this research field, did not even find it Any questions that need to be asked.

Although Chang Haonan simplified many complicated steps, he gave full and detailed explanations of all key points that may cause doubts.

After listening to this part, his first feeling was——

The “half of students” mentioned before is still too high.

My own students know that there can be no more than three students who have the ability to follow us here without any problems.

Chang Haonan on the stage glanced at the five big guys below with his peripheral vision. Obviously, for Tang Lintian and Liu Zhenxiang, whose research directions focus on engineering applications, this part of the content is already a bit too much.

Du Yishan and Qian Lao have sufficient theoretical foundation, but due to their advanced age, it was fine at the beginning, but now that forty minutes have passed, their energy is a bit lacking.

Fortunately, judging from Yuan Xiangya's performance, he has completely kept up with the idea.

"Based on this algorithm, we have developed a new set of multi-physics coupling calculation tools, namely TORC Multiphysics, for strongly coupled multi-physics problems. So far, I have been working on the turbofan 10 aero-engine project. , 75,000-ton heavy-duty die forging press project, and used this tool in the process of improving the boundary layer-free supersonic inlet for Project No. 10..."

"..."

The last two-thirds are more of a results report than a paper.

Even a brief explanation took a full hour and a half.

There was also a break in the middle.

In fact, even Chang Haonan himself realized that he had done so many things in the past few years since his rebirth when he was doing this summary.

Not to mention others.

Therefore, when he said "My report is complete, please criticize and correct me", the six people below could not even react immediately.

It wasn’t until he returned to the podium and turned the PPT to the last page that the applause started.

This was the sparsest applause Chang Haonan had ever heard, but it was the heaviest.

In the audience are old, middle-aged and young scientific researchers since the founding of the People's Republic of China.

On the stage, there is... No, it should be said that it is a rising star of the future.

The flames of fire are passed down from generation to generation.

(End of this chapter)

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