Chapter 155: We studied it for a few months, and they solved it in two days?
Peng Hui gave Cui Xunnian a criticism and education in a loud voice, "Units like you should also give money!" ”
"People are good mathematics professors, and their research is so good that they don't pay for help, is it reasonable?"
"We also gave 200,000 last time!"
Peng Hui didn't mind saying more, anyway, Cui Xunnian didn't know, "People have done data analysis, why do it take ten days or half a month?" ”
"The most important thing is not time, but ability."
"You think, with a research project like yours, it's almost the same as burning money on alloys, and if you delay it for a few months, you may not be able to produce results."
"If you want to find someone who has the ability to help, it's also sincere to give money, right?"
"You're the kind of unit that you've been in for too long, and you don't understand the situation outside!"
Doing other things was said by Peng Hui like this, Cui Xunnian was already anxious, but now he listened patiently and felt that what Peng Hui said was very reasonable.
Now to find a laborer outside, you have to give hundreds a day, and find a top mathematician to help you do research, which consumes a lot of brain power and time, and it is impossible to say that you don't give money.
Before, he didn't think about money at all.
The main reason is that this problem is very difficult, and several aerodynamics experts in the institute have been studying around the equation, but there are no results.
Wang Hao, okay?
That's the problem.
Cui Xunnian put a question mark in his heart, he came to Wang Hao, mainly to see that Wang Hao has the world's top research on the approximate solution of NS equations, and at the same time, he has other top achievements in the field of partial differential equations.
However, in the face of a system of partial differential equations, a complex system of equations with NS equations, how easy is it to get a more approximate solution?
The practice of the experts of the institute is to constantly substitute numbers to make calculations, and then judge the situation of disaggregation one by one according to the analysis.
Some solutions that look good are selected to design experiments to test the effect.
All of them later proved to fall short of the requirements.
Cui Xunnian is one of the researchers in the team, but he is not the main person in charge of the project, at most he can be called the 'deputy director', he is only responsible for this part of the content.
The research was stuck here, and he felt very anxious.
Of course, the responsibility is not entirely his, because the difficulty of the research is here, and many people in the team are researching around this point, but they have not been able to make a breakthrough.
After putting down the phone, Cui Xunnian thought about what Peng Hui said, and felt that he should come up with funds.
However, it is not easy to give money.
This is not his own project, and he is not the main person in charge, he can only put forward his own ideas and suggestions.
But what if you spend money and don't get results?
That's where the pressure comes in.
He thought hesitantly, found out Wang Hao's resume, and after reading it for a while, he suddenly became much more determined.
Wang Hao's resume is too dazzling.
In the past year or so, he has completed a lot of research, and two papers have been published in top mathematical journals in the field of partial differential equations alone.
He is also an expert in data analysis, participated in Peng Hui's alloy project, and was invited to give a lecture at the Institute of Aeronautical Materials, and his research content has received great attention.
Not to mention, the study of number theory.
His latest research on mathematical methods is considered to be a Fields grade achievement and is expected by the international mathematical community.
"Top mathematician!"
Cui Xunnian made a simple summary, and the resume in front of him made him feel incredible.
A sentence suddenly came from outside, "Director Cui, a meeting is over!" ”
Cui Xunnian hurriedly stood up and walked to the conference room, walked to the door and thought about it, and came back to get Wang Hao's resume information.
Presiding over the meeting was Yang Yuan, the general leader of the project.
Cui Xunnian entered the conference room and sat on Yang Yuan's right hand, and the others also came in and sat in their place.
Yang Yuan said, "Let's make a summary. During this period of time, the progress is relatively slow, and the main problem is the calculation of wind resistance. ”
He looked at the person on the right and said, "Zhang Binghe, you first talk about the problem of wind resistance experiments. ”
Zhang Binghe picked up the document in his hand and said, "We have conducted seven wind resistance experiments since we started three months ago, and the highest evaluation value of the experimental test is 23.6, which is in the fourth experiment. ”
"Our goal is to reduce the evaluation value of the wind resistance test to below 20, and for the time being, it can be said that there is no progress and there is still a long way to go."
"Last week's seventh experiment proved that the data from the fourth experiment could no longer be adjusted......"
He shook his head as he spoke.
The wind resistance test of the experimental design, that is, the wind pressure resistance of the aircraft model, is directly aimed at reducing the air resistance, the smaller the air resistance, the same power can bring greater acceleration, which will make the aircraft more flexible.
When flying at low altitudes, the aircraft has more power and faster acceleration, which can also greatly improve the safety factor and flexibility, which can be said to be related to all aspects of performance.
Unfortunately, their research has not progressed.
The main thing is that it is impossible to accurately calculate the wind resistance, even if it is a more accurate calculation, many experiments, relying on the substituting values to obtain the solution, it can be said that it is by experience and luck.
Yang Yuan thought about it and nodded, he asked Cui Xunnian, and said, "I heard that you found a few experts from outside a while ago, do you have any results?" ”
Cui Xunnian shook his head, "They all said that the difficulty was too high and couldn't be solved." ”
This answer is disappointing.
He hesitated for a moment and continued, "However, I have found a new expert, Professor Wang Hao of Xihai University. ”
"Wang Hao?"
The others immediately said, "I've heard of this person, he just won the Chern's Mathematics Award, right?" ”
"Said to be a super genius, a future Fields winner."
"How did it turn out?"
Cui Xunnian did not answer, but said, "I'm thinking about a question, should we take out some funds and find outside experts to help solve this problem." ”
He said more seriously, "The main direction that we are good at is aerodynamics, and when it comes to the analysis of fluid mechanics problems, we can only follow the original method, or simply experience, and rarely can study the method by ourselves." ”
"This kind of pioneering research still needs to be done by mathematicians who specialize in partial differential equations."
"That's a big part of why we can't solve this problem."
Everyone else listened and nodded.
Even if they are confident in their profession, they know that there is a gap in their level of solving theoretical problems with mathematicians who specialize in partial differential equations.
Most of what they do is application, rather than studying the underlying logic.
Cui Xunnian said, "That's why I went outside to find other experts to help, I think Wang Hao is very genius, he has the ability to help us solve this problem." ”
His tone was very affirmative.
"But the question is, why should he help us? Is it because we are a military research institute? ”
"So I think we should come up with a fund to support it, rather than just asking other people to help."
Cui Xunnian's words were so orderly that everyone in the conference room fell into deep thought, and he took the time to hand Wang Hao's resume to Yang Yuan.
Yang Yuan took a closer look and was also surprised by Wang Hao's genius, he then looked at the others, "What do you think?" ”
Someone said, "It's feasible or not, let's see?" How much does it cost? ”
Zhang Binghe also asked, "We can't study it, and we can only find others, but can we definitely find this Wang Hao?" Will it be funded, but there will be no results? After all, we've been studying for months, and he's a genius alone......"
He shook his head, and the meaning was already obvious.
Yang Yuan was silent for a moment, thinking about it and asking Cui Xunnian, "How much do you think is appropriate?" ”
Cui Xunnian said: "I have a friend named Peng Hui, and his alloy project asked Wang Hao to do an analysis, 200,000 yuan. ”
“……”
“……”
The room was silent.
Yang Yuan was surprised when he heard this number, they didn't want to do a project or just solve a system of equations.
Although there is no way to do this equation system in the entire research institute, it always feels like it is too much to sell 200,000 at a time.
In the end, Yang Yuan gritted his teeth and made a decision, "200,000 is 200,000, let's see the effect of this 200,000, which is just the cost of two experiments!" ”
"But ......"
Zhang Binghe still felt that it was too much, but he didn't say anything later.
He didn't have anything to do about it.
……
Seohai University, Office of the General Building.
Wang Hao is patiently doing research, for the equations given by Cui Xunnian, he has come up with six sets of approximate solutions, but he is trying to improve, hoping to further approximate each group of solutions.
The process is like approaching a number, such as the number 5, and the first approximation is 4.9, the next is 4.93, and the next is 4.94......
A little bit closer, theoretically never a 5, but always close to it.
Now he has transformed two of the approximate solutions twice, and it will become more and more difficult in the future.
But Wang Hao still wants to transform again.
Now that he has promised to solve this problem, he will definitely try to do his best. Just as he was studying carefully, a voice suddenly came from the door, "Professor Wang Hao, are you there?" ”
"In!"
Wang Hao raised his head and shouted.
The people in the office immediately saw that Liu Jian, the director of the finance department, walked towards Wang Hao with a big belly.
Zhang Zhiqiang pulled the stool next to him over, which can be regarded as a simple entertainment.
"Thank you."
Liu Jian didn't sit down, but pressed his hand on the table and directly explained his intentions, "Professor Wang, I'm here to tell you that there is a sum of money transferred to the school account, 200,000 yuan, which is specified as your labor fee." ”
"Who called?" Wang Hao asked suspiciously.
Liu Jian leaned over and whispered, "It seems that the message says 'Aerodynamics'?" I checked, and there was no such place at all, and the information was very vague. I don't know what's going on, so I'll ask you. ”
Wang Hao thought about it and immediately reacted, "I know, then call me directly." ”
"That's fine, isn't it?" Liu Jian asked definitely, because the transfer information was very vague, and he was worried about what problems were involved.
Wang Hao nodded and said, "The other party has approached me, it is a small project problem, it should be the labor fee for me, and Dean Luan also knows about it." ”
"That's good!"
As soon as Wang Hao said this, Liu Jian was relieved.
After Liu Jian left, Zhang Zhiqiang asked curiously, "What are you doing?" Have 200,000 labor fees? ”
"Solve a system of equations." Wang Hao explained simply.
"Solve a system of equations? Two hundred thousand? Zhang Zhiqiang opened his mouth exaggeratedly, "Wang Hao, if there is such a good thing in the future, introduce it to me, I am also good at math, and I can also help!" ”
Wang Hao looked at Zhang Zhiqiang and nodded, "Okay, I will introduce you next time." ”
"Really? Remember! Zhang Zhiqiang felt a little wrong, but the temptation of 200,000 was too great.
Luo Dayong walked over, he didn't know where to find a mirror and put it in front of Zhang Zhiqiang's eyes.
Zhang Zhiqiang looked in the mirror and said strangely, "What are you doing here?" ”
Luo Dayong gave the mirror to Zhang Zhiqiang, then sat back in his place and said, "Take a good look, people, it's important to see yourself clearly." ”
“……”
Zhang Zhiqiang took a deep breath, pressed his left hand on his right hand, and controlled the fist that had been bouncing up.
Zhu Ping, who was at the door, suddenly shouted, "Zhang Zhiqiang, what are you doing with my mirror!" Give it back! You are a big man, what a mirror! ”
“…… No, no, Zhu Ping, it's not me, it's Luo Dayong! He held the mirror in his hand and was speechless for a while.
Zhu Ping recaptured the mirror with annoyance.
Zhang Zhiqiang sat down with depression, thought about it carefully, and suddenly felt that something was wrong.
He looked at Zhu Ping, then at Luo Dayong, and secretly wondered, "It's a little wrong, why does Luo Dayong seem to be ...... Only for me? ”
"Zhu Ping hasn't scolded Luo Dayong for a long time......"
"Something is wrong, it's not normal!"
……
Wang Hao took 200,000 yuan in labor fees, and he also felt a little embarrassed, because he was just doing research by the way.
Take the money and do the errands.
He's more motivated to work.
It took him a day to further transform the two groups of approximate degrouping, and obtained two more accurate approximate disintegrations, and then thought about it and sent it to Cui Xunnian.
Side message: These are the two sets of approximate solutions that I just got, and there are four more sets of solutions to be sent to you in a few days.
Cui Xunnian has been doing relevant research, but there is almost no progress to speak of, and thinking about the situation on Wang Hao's side, even his mood has become a little anxious.
200,000 is still a lot of money, almost the cost of two experiments.
Even if Yang Yuan made a decision to give such a labor fee, he still felt a lot of pressure.
If Wang Hao can't come to a conclusion, 200,000 yuan is equivalent to a waste, and I don't know when Wang Hao will come to a conclusion.
He thought about walking around the office and glancing at his computer screen to find a new email.
Choi Hoon-nian opened it in the past and was surprised to find that there were two sets of data.
When he saw Wang Hao's message, he was a little hopeful that he didn't receive the data, because according to his thoughts, even if he did research, it was impossible to do it so quickly.
If half a month has passed, a conclusion is sent, or a report is simply sent, which is naturally the best situation.
At the very least, it can prove that the other party has done research very seriously, and even if the value still cannot pass, he can explain it to the project team.
Looking for someone, I can't finish it, but at least I tried hard.
Now that the results were coming quickly, but there were no reports on them, he didn't know what to do for a while.
Cui Xunnian gritted his teeth and went to Yang Yuan's office.
in the office.
Yang Yuan asked, "Do you believe these two sets of data?" ”
Cui Xunnian gritted his teeth and nodded, "I believe in Wang Hao." ”
Yang Yuan thought silently, he had the same thoughts as Cui Xunnian, and he also felt that the data came too quickly, and there was no way to know how the data was obtained without relevant reports.
Their experimental tests are generally to demonstrate the data first, and only through the data can they decide to conduct experiments based on the data, because each experiment consumes more than 100,000 yuan, which is not a simple decision.
If you don't have a report, you don't know what to do.
In the end, Yang Yuan thought about it for a while, and simply made a phone call, he directly called the academic affairs of Xihai University, and then asked the academic affairs to tell Wang Hao to call back.
Wang Hao called back when he got the news, and when he heard Yang Yuan talk about the numerical problem and the report, he immediately hesitated, "You still need to report this research?" ”
"I didn't keep a record because I was researching, and if you were going to report, it would have to wait a month." ”
"And, I think to give the report...... You may not be able to understand it in a short time. ”
He said it hesitantly, because it sounded a bit shocking.
Yang Yuan was silent when he heard this.
He understood two pieces of information, one was that the report would take a month, and the other party seemed reluctant to write a report specifically for this work, but only did some analysis and research in passing.
The second is that the content of the report will be complex and they may not understand it.
Yang Yuan was silent.
Choi Hoon-nian was also silent.
After putting down the phone, the two glanced at each other, and for the first time, they clearly felt that their IQ and ability were despised, but what the other party said was very straightforward, and it seemed to be from the heart, and because of this, it was even more depressing.
"What now? Do you want to wait a month? Cui Xunnian was silent for a long time and said.
Yang Yuan couldn't laugh or cry, he didn't know if Wang Hao was too confident, or if his judgment was wrong, and finally simply said, "Since people are so confident, let's experiment!" ”
"An experiment only consumes some funds, and I can still bear this responsibility."
Yang Yuan is the person in charge of the project, and no one can change what he decides.
Soon.
There was a meeting within the team.
Even if the others were puzzled, they began to prepare for the experiment.
The experiment was not straightforward, the team needed to analyze the new numerical dissolution to calculate the rest of the data, and then use the resulting data to modify the aircraft model.
The next step is to prepare for the wind pressure test, which takes one day to prepare for the experiment, adding up to a total of three days.
Three days later.
Everything is ready.
The team in charge of the experiment turned on the huge high-voltage fan, and there was a violent humming sound in the operation room, and the aircraft model was fixed in place to withstand the wind pressure, and a series of data were also obtained.
The experiment lasted for half an hour before it stopped.
The data extraction is complete.
At this point, the team begins to divide and work together to calculate, and finally aggregates the data for analysis.
At seven o'clock in the evening, the experiment was completed.
A group of people gathered in the conference room again, and Zhang Binghe got all the data and was making the final calculations.
Everyone looked at him and waited.
Finally.
Zhang Binghe finished the calculation, he looked at the values on the paper, and his face was full of shock.
"How much?" Yang Yuan asked.
Others also looked over.
Zhang Binghe took a deep breath and said a number very simply, "18.7." ”
“18.7、18.7? How is this possible? ”
He was so surprised.
In the previous months of research, they continued to do analysis and conducted seven experiments, and the best data was only 23.6, and it was difficult to increase it by 0.1.
Right now...... 18.7?
This is definitely a very impressive number!
The others were also shocked when they heard this.
Zhang Binghe hurriedly asked, "Chief Engineer Yang, where did you get the data?" Who analyzed it? ”
"Wang Hao." Yang Yuan said his name.
"Wang Hao?"
"Is that the Wang Hao you said a few days ago?" Zhang Binghe was stunned.
Others were also surprised, "The value of these 200,000 flowers, an experiment, is directly 18.7." ”
"We've been working on it for a few months, and they've solved it in two days?"
"This is too godly, isn't it?"
“……”
(In the new month, sell Meng and ask for a guaranteed monthly pass!! )