I really just want to be a scholar

Chapter 460 Experimental errors are allowed, but mistakes are not

Qin Kelue pondered for a while, then read the previous and next few pages twice, then picked up the pen, quickly calculated it, and then flipped through the next hundred pages of data, and finally frowned.

Ning Qingyun, who was flipping through the documents beside him, noticed Qin Ke's expression, and asked unexpectedly, "What's wrong?"

"There is a problem with the lines of simulated data on this page." Qin Ke circled the lines of data in the middle of the page with a pen.

It happened that Qi Zhicong also came back and sat on the seat on the other side of Qin Ke. Hearing this, he casually asked, "Which part is the problem?"

He was indeed just asking casually, without taking his eyes off the checklist in his hand, and continued to make the final review for tomorrow's experimental equipment inspection report item by item.

As for the problem with simulated data?Isn't that normal? If the data obtained through the mathematical model can perfectly fit the actual data, then there is still a need to establish the physics branch of "experimental physics"? "Mathematical physics" has long unified the physics world.

The Institute of Mathematics has a cooperative relationship with their laboratory. The laboratory shared 10% of the funds, and it took more than a month to send the mathematical model. It has been used for almost two years. During the period, the Institute of Mathematics also used the experimental model After several optimizations, the overall matching rate of the simulation is now around 68%, and the main data is even roughly consistent with the data obtained from the experimental model, with a matching rate of more than 75%.

For such a large and complex experiment, this mathematical model can be regarded as the top level in the industry.

Therefore, Qi Zhicong almost said to Qin Ke that "there are problems with a few lines of simulated data", "only a few lines have problems? It is normal to have problems with a few hundred lines".

But anyway, he still wanted not to dampen the enthusiasm of Qin Ke, a newcomer in physics, so he swallowed his words back.

Qin Ke replied: "In the wave energy distribution part, the relationship data between the opening ratio and the transmission coefficient."

Qi Zhicong was in a good mood seeing that the checklist in his hand was basically okay for the second review, so he smiled and "pointed" Qin Ke a few words:

"Oh, the error in that part of the data is a bit big, it's normal, and the experimental model we use can't guarantee the accuracy. If it's just a reasonable error, don't worry about it. If you look at the data on the next few pages, you will find that the error is getting bigger and bigger. The matching degree is getting lower and lower. This is because as the reflection coefficient, transmission coefficient and wave energy dissipation coefficient of the breakwater change faster and faster, the accuracy of the original experimental model data cannot keep up. anomaly and somewhat ineffective here."

Most people will give up when they hear Qi Zhicong's words, but Qin Ke is different. He is very confident in his judgment. He handed the data page in front of Qi Zhicong and said seriously:

"Brother Qi, the problem I found is different from what you said. You said the error caused by precision, but what I saw was an error. Look, these lines of data record the wave energy distribution and the number of different holes The wave-dissipating effect, the opening ratio of the multi-layer vertical air-permeable board wave-blocking is in the state of exceeding the high water level, every time it decreases by 20%, the average transmission coefficient will increase by about 24%, while the average dissipation coefficient will decrease by 11% %. It can be deduced from these lines of data that under the state of super high water level, the opening ratio is negatively correlated with the transmission coefficient. But this is exactly the opposite of the data conclusion we have seen before, and it is also contrary to our deduction based on theoretical physics The conclusions that came out were the opposite."

Qin Ke stared into Qi Zhicong's eyes, and his expression became serious: "What you said just now is that the matching degree is getting worse and worse. This is the key point. From here, it is wrong. It is related to the opening rate under the high water level beyond the limit. Dozens of pages of data will make the error appear particularly large. Because when you do experiments, the state of exceeding the high water level rarely occurs, and these erroneous data account for a small proportion of the entire experimental data, so it is naturally difficult for you to find it. "

Qi Zhicong felt that Qin Ke was making a big deal out of a molehill: "Our experiment will basically not involve the state of ultra-high water level. This is a special situation that only occasionally occurs under the conditions of the experimental model. I think it is nothing to make mistakes. Question?"

Qin Ke shook his head and insisted: "I have seen the design plan of the 'J-92' breakwater. The opening rate of the high section is relatively small, which should be related to these erroneous data. In case there is an accident tomorrow, resulting in an overrun What about high water?"

Seeing that Qi Zhicong was finally moved, Qin Ke continued to add fire: "Experimental errors are allowed, but mistakes are not. Physics is a very rigorous subject. At least from my point of view, if this mathematical model has some details If there are mistakes, there is no guarantee that there will be no mistakes in the details of key links.”

Qi Zhicong's face changed again. In such a large-scale experiment, any slight error in a key link may lead to unpredictable failure risks or even experimental accidents.

Ning Qingyun stopped her calculations at this time, raised her head and said seriously: "I have verified it, Qin Ke is right, this part of the data is indeed a key turning point, and the data area allocation rate of the next few dozen pages is less than 15% , are all related to the errors in these lines of data.”

Sweat began to ooze from Qi Zhicong's forehead, he gritted his teeth, finally made a decision, and said to the two, "You guys follow me to see Professor Duan."

The conversation between the three was not loud, but several nearby researchers heard it, and they couldn't help but look at me, and their faces became a little nervous.

The embankment of a thousand miles collapsed in an ant's nest, this sentence is by no means alarmist.

But the problem is that everyone has put in countless hard work and sweat for tomorrow's experiment, and the money spent is even exaggerated. Is it because of a "trivial" small mistake that it has to be postponed or even interrupted?

While several researchers were whispering to each other, Qin Ke and Ning Qingyun followed Qi Zhicong to knock on the door and walked into Professor Duan Yonggong's office.

Professor Duan was still looking at tomorrow's experimental plan carefully. After hearing that Qin Ke and Ning Qingyun had discovered an error in the mathematical model, he frowned and asked which part had the problem, and then double-checked. Sticking to his point of view, he still trusts these two gifted students. After a little thought, Qi Zhicong said:
"Xiao Qi, please contact the Institute of Mathematics and ask them to provide a complete mathematical model, including the whole process of modeling documents, let us check."

Qi Zhicong said with a bitter face: "Professor Duan, I asked them for it a year ago, didn't they refuse to give it? They also mocked that even if we gave it, we wouldn't understand it."

Generally speaking, it is normal for the other party not to provide the mathematical model. Just like software vendors selling software, they all sell formal programs. When have you ever seen a software vendor provide source code?
Professor Duan glanced at Qin Ke and Ning Qingyun, and resolutely said: "Isn't there someone who can understand it now? And it's their model that is wrong, and they have to give us whatever they want. Go. Are you serious?" Otherwise, I will go through the formal application process to my superiors."

Communication between the juniors is called communication. Once the boss comes forward to go through the formal process, it will be forced, and it will easily affect the "friendship" between the laboratory and the Institute of Mathematics.

Of course, there are rumors that this year, Professor Duan Yonggong and Professor Lan Weifeng, who is in charge of this mathematical model project at the Institute of Mathematics, had a bad relationship because of the competition for the number of academicians. Whether there is a "friendship" between the two has to be a big question mark.

This is also the reason why Professor Duan is reluctant to come forward easily, and it is easy to be regarded as provocative or even "malicious competition" behavior.

Qi Zhicong could only say, "Okay, I'll try my best to get it."

……

Xia Guo Academy of Sciences, Institute of Mathematics.

Professor Lan Weifeng, the person in charge of the "Mathematical Modeling Group 3", was sitting in the office, flipping through the latest mathematical journals, when the phone ringing suddenly interrupted his train of thought.

Lan Weifeng closed the journal with some displeasure, and looked at the caller ID. It was a call from one of his doctoral students. He picked up the phone and said impatiently, "What's the matter?"

The doctoral student knew that Professor Lan had a strong personality, and he would not dare to be rude in front of such a boss. He said with some awe:

"Professor Lan, Professor Duan Yonggong's Fluid-Structure Interaction Mechanics Laboratory, called to ask us for all the information of the mathematical model, including the preliminary analysis and modeling process..."

Professor Lan Weifeng felt even more uncomfortable when he heard the name "Duan Yonggong". Originally, he was [-]% sure that he would be selected as an academician this year, but Duan Yonggong, who is currently presiding over an important national scientific research project, came out on the way, which made him selected as an academician. The probability is greatly reduced at once.

Therefore, in the past few months, Lan Weifeng has been in a bad mood, he snorted and said:

"A group of marine soil mechanics, what kind of mathematical model do you want? Didn't you say that you don't have to agree to them?"

The doctoral student said cautiously: "They...they said they found an error in the mathematical model we provided, and they have to get all the data and analyze it overnight to judge whether the super-large-scale actual measurement tomorrow afternoon will be held as scheduled."

"Is there a mistake?" Professor Lan Weifeng laughed angrily:
"The ocean soil mechanics say that our mathematical modeling has problems? It's a big joke. I dare not cross-border to point fingers at their experiments. They feel good about themselves and criticize our mathematical models. Duan Yonggong, did he become arrogant because he thought he was about to be selected as an academician? Don’t look at the nearly [-] people in our Institute of Mathematics, and hundreds of subjects a year, which subject is wrong?"

The doctoral student didn't dare to speak out, and said in a low voice, "I heard...it was not Professor Duan and the others who found something wrong with the mathematical model, but a freshman who was doing an internship in the laboratory. His name is...Qin Ke."

"Qin Ke?" Professor Lan Weifeng was taken aback, then his face changed slightly: "That Qin Ke who won the Chern Mathematics Award this year?"

"It should be him...Qin Ke, a freshman in Xia Guo, is also good at mathematics. It seems that there is no second one."

Lan Weifeng was silent. If it was someone else, he would naturally sneer, but Qin Ke... At the beginning of the year, he relied on mathematical modeling to force an authoritative figure in the biological world to the [-]th floor of hell. Don't expect to turn over in this life .

The mathematical model I am responsible for is related to an experiment with a scale of hundreds of millions. It is not a joke if something goes wrong, and there will be joint and several liabilities.

"Did you say what's wrong?"

The doctoral student did not expect Professor Lan Weifeng to make a 180-degree turn when he heard Qin Ke's name. Didn't he just say that it is impossible to make mistakes?

He complained in his heart, but how dare he say it out, he hurriedly said: "They sent an email, I'll print it out for you?"

Professor Lan Weifeng had a dark face, got up and paced back and forth, and finally said: "You go and call all the people involved in this mathematical model to the conference room, and print out the number of copies of the email content according to each person's head, so that everyone can study it together. Where is our mathematical model wrong and why! Really, don’t let me find out which bastard caused this mistake, it will embarrass our research institute!"

"Yes." The doctoral student was shocked when he heard Professor Lan's murderous words. He didn't dare to say anything and hurried to do it. Before he put down the phone, he could vaguely hear an unhappy tongue-clicking sound from over there:
"That kid, why did you go to Duan's laboratory? Wouldn't it be better to come to our Institute of Mathematics for an internship?"

……

When Qi Zhicong received the email reply from the Institute of Mathematics, he was a little dumbfounded.

"They...they actually admitted that there were indeed mistakes, and said that the relevant careless researchers have been severely punished?"

Qi Zhicong knew how arrogant those people in the Institute of Mathematics were. Even if his boss, Professor Duan, didn't necessarily make him admit his mistake, he didn't expect to admit it in less than an hour. Question, and the relevant personnel were punished?
Is the sun coming out of the west?

What Qi Zhicong couldn't believe the most was that the Institute of Mathematics actually sent over all the mathematical models and related materials.

only……

"The compressed package is encrypted? Need Qin Ke to call and tell you the password? What kind of tricks is Professor Lan playing?"

Qi Zhicong didn't dare to make his own decisions, so he ran to report to Professor Duan.

As soon as Professor Duan heard it, he understood that it was Professor Lan who refused to bow to him, and was playing Guan Yu's old routine of surrendering Han but not Cao.

"Then let Qin Ke make the call. By the way, thank Qin Ke for me. If it weren't for him, it would be difficult for us to get this mathematical model."

Qi Zhicong thought for a while before he understood, and said in shock: "You mean, the Institute of Mathematics sent the data of the mathematical model for Qin Ke's sake?"

Duan Yonggong gave a rare smile: "Now that Xia Guo is talking about mathematical modeling, who dares to ignore Qin Ke?"

When Qi Zhicong went to look for Qin Ke, the slight pride on his face disappeared, and he replaced it with a friendly smile: "Qin Ke, can you do me a favor?"

After hearing Qi Zhicong's request, Qin Ke said quickly, "No problem."

He took the number and called on his mobile phone.

Qi Zhicong was embarrassed to go too close to hear the conversation, so he returned to his seat, but he pricked up his ears curiously. He only heard Qin Ke and the other side exchanging greetings, then politely refusing something, and finally hung up. Got the phone, came over and entered the password of the compressed package.

Qi Zhicong saw several documents, the title of which was the mathematical modeling file of this project.

At this time, the researchers in the surrounding area had heard about it, and they all came over to ask: "Qin Ke, is there a big problem with this mathematical model? Should we stop the experiment tomorrow afternoon?"

"I have to ask Professor Duan about this. Brother Qi, can I have a look at these materials?"

Qi Zhicong hurriedly said: "Of course, Professor Duan also means the same. He wants you to see if there are any mistakes in the key links, and then decide whether to continue or postpone tomorrow's experiment."

He glanced at the first document he opened. There were more than 500 pages, which made people feel dizzy. There were six similar documents.

Qi Zhicong bit the bullet and asked, "I said Qin Ke, how long will it take you to read these documents?"

He also knew that it would be difficult for Qin Ke to find out if there were any errors in the mathematical model after reading these documents in one day.

Everyone also leaned over to take a look, with despair on their faces.

Such a complicated mathematical model, if they all work together, even if it takes a month to analyze, I'm afraid there may not be any results!

Qin Ke opened several documents and roughly scanned the space: "About three hours."

"How long?" Everyone thought they heard it wrong.

Qin Ke looked at the time: "It's eleven o'clock in the morning, and I can finish it at two o'clock in the afternoon. Before five o'clock, Qingyun and I will give a preliminary evaluation result. Then everyone will have a meeting to discuss tomorrow's experiment?"

Slap, a scientific researcher dropped the data in his hand because he was too shocked.

　Continue to ask for monthly ticket recommendation tickets, fully booked
　　
　
(End of this chapter)