Chapter 256: Aviation Engine, Zeng Haiyu: We are all starving to death, you ask me why I don’t eat meat?
The afternoon classes started at two o'clock, and at half past one, the large classroom was already overcrowded.
Many students came to the classroom to reserve seats after lunch. Some even came as early as twelve o'clock, and those who came after 1:30 simply couldn't find a seat.
Some teachers who came in were very surprised when they saw this scene. They cried and laughed when they took a closer look.
It is impossible for so many students to be graduate students or doctoral students in the Department of Mathematics or Physics. Many of them are juniors and seniors.
They came because they heard about Wang Hao's lectures.
After all, it was a formal open class. Students who came to attend the lecture on their own initiative could not be kicked out, and they could not find seats because they arrived late. Later, several teachers simply moved chairs to the nearby office, right in front of the edge aisle, or
I only sat down after adding chairs in the back row.
At the same time, there was a lot of discussion in the classroom, "Professor Wang finally started classes again!"
"I came here specifically to listen to Teacher Wang's lectures. Those of you who haven't heard of it may not know that Teacher Wang's lectures are very good!"
"Mr. Jones was giving the lecture in the morning, and that Amerikan man was not good at all. He couldn't understand anything he was talking about..."
"Me too, I don't understand it at all..."
"His Chinese level is not good yet, but he speaks very fast. How can he listen?"
"It seems that the afternoon class will be connected to the morning class, right? Is it possible for it to be so difficult?"
"I don't know, but I have to listen anyway..."
Paul Phil-Jones walked into the classroom amidst the commotion.
He entered the classroom from the main entrance. Seeing the crowded scene, he immediately stood at the door and rubbed his eyes vigorously, "Why are there so many people?"
Many students left in the morning.
The afternoon classes connected with the morning classes, and normally not many students would come to attend the classes. He thought that few people would be there, and he was still worried about Wang Hao's classes, but he saw a scene like this.
Paul Phil-Jones was stunned for a long time. He didn't know whether to go in because he knew he couldn't find a seat. Fortunately, Zheng Yaojun also came. He sat on the side of the first row and faced the door.
Wave, "Paul, here!"
Paul Phil Jones looked up and simply walked over and sat in the seat reserved by Zheng Yaojun.
After sitting down, he asked in surprise, "Zheng, why are so many students here?"
"What's the big deal?"
Zheng Yaojun said nonchalantly, "Many students still don't know this, otherwise the classroom wouldn't be able to accommodate it."
"Is Wang Hao's course so popular?"
"Of course."
"But the content of his lecture is connected to the morning..." Paul Phil-Jones hesitated for a moment and continued, "There are not many people left in the morning."
Zheng Yaojun pursed his lips hard and didn't know whether he should answer the call. He was also present in the morning, and he couldn't keep up with what Paul Phil Jones said.
He specializes in academic fields. He is a scholar in the field of partial differential equations and naturally has no research on theoretical physics.
But considering that Wang Hao was going to give a lecture, he still came because Wang Hao's lectures were notoriously high and he had attended the lectures several times, so he felt it was necessary to come.
Zheng Yaojun did not answer, and the topic could not continue.
soon.
Wang Hao came to the classroom.
When Wang Hao stood on the podium, the classroom suddenly became quiet. He looked at the number of people in the classroom, and he was not surprised.
One is reputation and the other is teaching level.
As long as he holds open classes, there will never be fewer people coming.
Wang Hao was still a little depressed about the content of the explanation, because it connected with the content of the morning course, and most people did not understand the morning course.
He still thought of a way.
Many teachers and students in the audience also wanted to see how Wang Hao would start the course.
At this time, Wang Hao said with a smile on his face, "This lesson is about connecting
Mr. Wu Jones’s course starts from the four-dimensional space.”
"But before the class, let's review the morning class first."
He officially entered the explanation.
Of course, Wang Hao would not explain the content of the morning again. He just went through the knowledge points and then wrote several conclusions and methods that needed to be used one by one on the whiteboard that was placed.
This process took about half an hour.
Although there was no specific explanation, the conclusions and methods of the morning knowledge points were repeated several times in succession, and time was given for students to record them carefully.
Then we entered into the formal explanation.
At this time, it becomes much smoother to move on to the next step of content explanation.
"Under the premise that the speed of light remains constant, the special theory of relativity's space-time view has reshaped humankind's understanding of the universe."
"Space and time are no longer isolated from each other, but are connected by the movement of matter, forming an inseparable whole..."
"After establishing a new view of time and space, a more elegant mathematical form will inevitably be needed to unify the three-dimensional space and the one-dimensional time under the same framework. This is the concept we have heard of -
Four-dimensional space-time.”
「…………」
After the opening introduction, the course is entering the formal content.
There are a lot of complex mathematical analysis contents in the middle, and Wang Hao will explain in detail the key and difficult issues.
If he encounters content related to the morning course, he will directly quote the conclusions and methods listed on the whiteboard to make students understand better.
With the improvement of understanding in "Feedback from Teaching", most of the graduate students and doctoral students in the classroom can roughly understand it.
Undergraduate students with no basic knowledge can also understand the general content.
When you find that you can understand such profound knowledge, it will undoubtedly arouse students' interest, and they will naturally listen more carefully.
This also allowed Wang Hao to receive a large amount of gifts of knowledge and understanding, even more than he expected, because some knowledge related to the content explained by Paul Phil-Jones was also directly given back to him.
Wang Hao was very surprised. During the break during the course, he thought about it carefully and understood it.
Because everyone did not understand the knowledge explained by Paul Phil-Jones, but he listed the relevant content on the whiteboard and continued to quote it, which naturally stimulated thinking and understanding of relevant knowledge.
Now I feel that after giving a one-hour class, I can always give back more knowledge and understanding.
"That's not bad!"
"It seems that it would be helpful to have Paul give lectures in advance..."
"Although the students didn't understand it, it doesn't prevent me from improving the efficiency of my teaching feedback."
Wang Hao thought a little strangely.
Paul Phil-Jones sat on the side of the first row and listened carefully. He found that Wang Hao's explanation was indeed very good, and he felt that it was very rewarding.
There were some contents that I didn’t understand so deeply before, and I didn’t think about that much, but after Wang Hao explained them, I felt that I understood them more clearly.
Such a small gain is difficult for Paul Phil-Jones to appreciate, because most of the knowledge content is meaningless to him.
What made him depressed was that he didn't see what happened in the morning.
During the break, he looked back carefully and found that not many students left at all, most of them stayed in the classroom, and everyone listened very seriously.
Waiting until the class is over, that is, nearly three hours later, the classroom is still overcrowded, even more than at the beginning, because there are more than 20 students standing in the last row, who obviously walked in later.
People who can't find a seat.
When he thought about the situation in the morning carefully, he suddenly felt restless.
I gave a lecture and all the students left.
When Wang Hao lectured, he continued to connect his own content. Not only did the students not leave, they listened with great interest, and more and more people came.
This gap is also too big.
After the classes were all over, Paul Phil-Jones walked out of the classroom feeling a little depressed.
When Wang Hao saw him looking sad, of course he knew why, but he still felt that he should give him some comfort, "Paul, don't worry about it."
"Actually, the reason why there are so many students in my courses is just because this is China and I am very famous."
"Is that so?"
Paul Phil-Jones was a little unconvinced because he thought about the situation where all the students left halfway through the course, "Then why..."
Wang Hao waved his hands vigorously and said, "That's normal. That may have something to do with your Chinese level, rather than how bad your teaching level is."
"Oh~~"
This explanation made Paul Phil-Jones suddenly realize.
yes!
Mainly because his Chinese proficiency is not standard, and students may not understand some esoteric knowledge when explained.
He suddenly became motivated again, "I have decided, Wang Hao."
"From today on, I will work hard to learn Chinese. Just being able to speak Chinese and communicate is not enough. I want to make my pronunciation and oral expression correct and reach the level of ordinary Chinese!"
"come on!"
Wang Hao gave him a thumbs up.
Paul Phil-Jones nodded firmly. He was really envious of the fact that so many people came to listen to Wang Hao's lectures, and he also hoped that he could reach this level one day.
This is another kind of achievement that is different from scientific research!
He is extremely looking forward to having so many students listen attentively when he lectures after he improves his Chinese.
........
Paul Phil-Jones' work life is indeed very fulfilling. In addition to being motivated to learn Chinese well, he also works very hard on research.
His research direction is to continue to analyze the annihilation force. The method is to start from the decay problem, and based on the higher dimension of the annihilation force, analyze other decay problems to see if there can be new discoveries.
Even if there is no discovery to analyze the annihilation force in a new mathematical form, it is still a contribution related to the annihilation theory.
In fact, some physicists in the world have already begun to do similar research.
Wang Hao and Paul Phil Jones analyzed the decay of a particle and discovered new particles in the process, and there are many particles that can decay.
Each type of decay particle can be analyzed in a new way, because there are already traces to follow, and the research is just like "substituting into the formula," except that the basic requirements are higher.
If we can shape the correct mathematical logic and perform calculations in conjunction with the Yang-Mills equation, it will naturally be possible to find new particles.
Wang Hao is no longer interested in research in this area.
As the founder of annihilation theory, it is impossible for him to study every content himself, but it is enough to just study the decay of a particle.
The most important thing about this study is that it provides the basis that the dimension of annihilation force is higher than the other three microscopic forces.
On this basis, other scholars have conducted extended research. Naturally, the higher the results, the better. The higher the results, the closer it is to confirming the annihilation force.
This has only advantages and no disadvantages for him personally.
It is impossible for a single scholar to complete all the research on the content of each physical theory. More scholars must participate in order to jointly improve the theory.
Wang Hao has no definite next research direction, and his work life is relatively leisurely.
He occasionally discussed with Bill Carr the simplification of semi-topological micromorphological geometry; occasionally he paid attention to the research of Paul Field-Jones; occasionally he went to the calculation group to care about the progress of the combination of elements, etc.
This is a big day.
"Journal of Mathematics" has released a new issue
The content of Qiu Hui'an's proof of Legendre's conjecture was published, which immediately aroused heated discussion in the international mathematics community.
The proof of every conjecture in the field of number theory can be said to be an international-level mathematical achievement.
This proof was completed by Qiu Hui'an, and the corresponding author's name is Wang Hao. Naturally, many people started discussing who Qiu Hui'an was...
Then they learned that Qiu Hui'an was Wang Hao's student and was only a graduate student.
This news aroused heated discussion at home and abroad, "Wang Hao's graduate student has actually been able to complete the proof of Legendre's conjecture!"
"Qiu Hui'an, remember this name, the future master of number theory!"
"As expected of Wang Hao's students, he has already proven number theory problems while still in graduate school!"
"A paper published in Acta Mathematica Sinica, as a master's thesis? What could be more perfect than this?"
Can this paper win the Chung Jiaqing Mathematics Award from the Mathematics Society?"
"Not to mention the Chung Jiaqing Mathematics Award, it is enough to win international mathematics awards!"
The heated discussion in domestic and foreign public opinion has naturally affected Xihai University.
Yan Fudu of Xihai University made a special trip to see Qiu Hui'an and awarded him a bonus of 500,000 yuan on behalf of the school. He even promised to stay at the school and arrange an unusual associate professor position.
"Xiao Qiu, you can serve as an associate professor in the school while studying for a Ph.D., and after graduating from the Ph.D., you can directly become a full professor!
"Don't worry, you will get all the benefits you deserve. You are not from Northern Xinjiang Province. The school will provide you with placement allowance after graduation..."
"The university must give the best care to talents..."
It is clear.
After the paper was officially published, Qiu Hui'an's net worth was completely different.
Before, he was just a graduate student. Even though he was a graduate student under Wang Hao's leadership, he was essentially just a student. But now he has become a talent that universities compete for.
Yan Fu made many promises in private, but he was still worried about Qiu Hui'an's stay and he even went to Wang Hao to inquire.
Wang Hao's only expression was, "Qiu Hui'an will continue to study for a Ph.D. with me."
There is nothing else.
In fact, Wang Hao doesn't care whether Qiu Hui'an stays or goes. It's good to have a talented student follow him at Xihai University, but leaving to work in other universities after becoming famous will have no impact on him.
Schools do need to develop, but school development is not about retaining all talents, but more importantly, being able to continuously cultivate talents.
.......
soon.
Another week has passed.
Wang Hao was drinking coffee leisurely in the office when he heard a report that someone had come over. He thought about it for a while and then remembered that it seemed that Shen Cheng had contacted him in advance.
He entertained the guests in his office.
The visitor is Zeng Haiyu, a researcher at the Shenyang Aerospace Engine Research Institute.
Zeng Haiyu was about fifty years old. When he saw Wang Hao, he took the initiative to introduce himself, "Professor Wang, hello, Zeng Haiyu from my aviation research institute."
Wang Hao politely moved Zeng Haiyu to the sofa, then turned around and made a cup of tea to entertain him.
Zeng Haiyu also talked about the purpose of coming. They are designing a new type of aero-engine. "We hope to improve on the original basis and design and manufacture an aero-engine that reaches the top international level."
"However, we encountered a problem in calculating the supercharging efficiency of the fan blades."
Zeng Haiyu said with some distress, "The calculation is really too complicated. If the accuracy of the calculation results can be improved, we can design a better plan. Professor Wang, you also know that..."
He said and shook his head.
If an aero engine is compared to a jet balloon, the greater the internal pressure, the faster the balloon will naturally fly. In order to obtain a higher boost ratio and generate greater thrust, the air in the engine usually needs to pass through multi-stage compressor blades.
compression.
Then, it is crucial to improve the boosting efficiency of fan blades.
However, if you want to improve the boosting efficiency of fan blades, you need a more reasonable design, and the design involves complex calculations.
The problem Zeng Haiyu's team encountered was that they had several design plans, but there was no way to determine which one was more suitable. In other words, in which plan the fan blades had a higher supercharging efficiency.
"This design is crucial and directly determines the main research direction within the engine."
"There are ongoing discussions within the institute, but there is no definite conclusion. But we have done many calculations, and the results..."
He felt a little embarrassed as he said, "The results are different every time."
Wang Hao thought for a while, frowned and asked, "So, you have several options, and you want to know through calculations which one has a higher fan design with a higher pressure boost?"
"right."
Zeng Haiyu nodded firmly.
"I still don't understand." Wang Hao said after thinking, "The wind pressure of turbine machinery involves fluid mechanics. Some of them need to be substituted with numerical values to do approximate calculations. Because the difference in the substituted numerical values will also lead to deviations in the calculation results.
The result will be different every time, that’s what it is, right?”
Zeng Haiyu continued to nod, "Yes, we have calculated results several times in a row with different results, and it is impossible to determine which plan is better."
Wang Hao suddenly wondered, "I don't understand this. Since manual calculations can make mistakes, why don't you use computer simulation calculations?"
"If you use a computer and input a large number of values to do simulation calculations, even if the deviation range is larger, but there is a lot of data, you will naturally know which solution is better, right?"
This is a question of probability.
For example, when comparing Plan 1 and Plan 2, if you substitute the value 2, the value of Plan 1 is higher. If you plug in the value 2, the value of Plan 2 is higher.
So if you calculate and substitute the values one by one, it will naturally be difficult to draw a conclusion about which solution is better.
If you use a computer simulation and substitute numbers from 1 to 10000 in one breath, there are 8000 better options for option one and 2000 better options for option two. Naturally, option one will become the best choice.
Zeng Haiyu felt like vomiting blood. He opened his mouth and didn't know what to say. He even looked at Wang Hao with an expression like, "Why not eat minced meat?"
We are starving to death, you ask why we don’t eat meat?
Computer simulation calculation?
They waste a lot of effort even doing manual calculations. If they can have high-end computer simulation operations, they still have to do manual calculations that are time-consuming and laborious?