Qin Ke pondered for a while and read the previous and next pages twice. Then he picked up the pen and calculated quickly. After flipping through the nearly a hundred pages of data, he finally frowned.

Ning Qingyun, who was also looking through the information next to him, noticed Qin Ke's expression and said unexpectedly: "What's wrong?"

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

Qi Zhicong happened to be back and sat on the other side of Qin Ke. Hearing this, he casually asked: "Which part is wrong?"

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

As for the problem with the simulated data? Isn't that normal? If the data obtained through the mathematical model can perfectly fit the actual data, then there is no need to establish the branch of physics "experimental physics"? "Mathematical physics" has long been

It unifies the world of physics.

The Institute of Mathematics has a cooperative relationship with their laboratory. The laboratory allocated 10% of the funds to come up with this mathematical model. It has been used for almost two years. During this period, it has been optimized several times based on the experimental model. Now the overall simulation is

The matching rate is around 68%, and the main data is even roughly consistent with the data obtained by the experimental model, with the matching rate exceeding 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 is a problem with a few rows of simulated data", "There is a problem with only a few rows? It is normal if there is a problem with hundreds of rows."

But in the end, he still wanted not to dampen Qin Ke's passion for studying as a newbie in physics, so he swallowed his words.

"Wave energy distribution part, relationship data between porosity and transmission coefficient."

Qi Zhicong was in a good mood when he saw that the checklist in his hand was basically correct for the second review, so he smiled and gave Qin Ke a few "pointers":

"Oh, the error in that part of the data is a bit large. It's normal. The experimental model we used cannot guarantee the accuracy. If it's just a reasonable error, don't worry about it. If you look at the following dozens of pages of data, you will find that the error is getting bigger and bigger.

larger, 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, resulting in the mathematical modeling part also due to quantity

Unusual and somewhat ineffective here.”

Most people would give up after hearing what Qi Zhicong said, but Qin Ke was different. He was very confident in his judgment. He handed the data page to Qi Zhicong and said seriously:

"Brother Qi, the problem I found is different from the problem you mentioned. You are talking about errors caused by accuracy, but what I see are errors. You see, these lines of data record the wave energy distribution and the number of different holes.

To improve the wave elimination effect, when the opening ratio of the multi-layer upright permeable board waves is reduced by 20% when the water level exceeds the limit, the average transmission coefficient will simultaneously increase by about 24%, while the average dissipation coefficient will decrease by 11

%. It can be inferred from these lines of data that at a high level, the porosity and transmission coefficient are negatively correlated. But this is exactly the opposite of the data conclusion we saw earlier, and it is also contrary to what we have deduced based on theoretical physics.

The conclusion is the opposite.”

Qin Ke stared into Qi Zhicong's eyes, and his expression became serious: "What you just said is that the matching degree in the back is getting worse and worse. The key is here, and it is wrong from here. The opening rate in the back is related to the excessive high water level.

Dozens of pages of data will make the error appear to be particularly large. Because when you conduct experiments, the state of exceeding the high water level rarely occurs. 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 fuss out of a molehill: "Our experiments basically do not involve the ultra-high limit water level state. This is a special situation that only occasionally occurs under the conditions of the experimental model. I think mistakes are nothing.

Question?"

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

What about the high water level limit?”

Seeing that Qi Zhicong was finally moved, Qin Ke continued to add fuel to the fire: "Experimental errors are allowed, but mistakes are not allowed. Physics is a very rigorous subject. At least as far as I can see, if this mathematical model has this detail,

If there are mistakes, there is no guarantee that there will be no mistakes in the details of key links."

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

Ning Qingyun stopped the calculation at this time, raised his head and said seriously: "I have verified that Qin Ke is right. This part of the data is indeed a key turning point. The data matching rate in the next few dozen pages is less than 15%.

, all related to the errors in these lines of data."

Sweat began to form on Qi Zhicong's forehead. He gritted his teeth and finally made a decision. He said to the two of them, "Come with me to see Professor Duan."

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

The saying that a thousand-mile embankment breaks down in an ant nest is by no means an alarmist statement.

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

While several scientific researchers were whispering to each other, Qin Ke and Ning Qingyun had followed Qi Zhicong into Professor Duan Yonggong's office.

Professor Duan was still looking carefully at tomorrow's experimental plan. After hearing that Qin Ke and Ning Qingyun discovered that there was an error in the mathematical model, he frowned and asked which part was wrong. After confirming it again and again, he saw Qin Ke and Ning Qingyun.

Sticking to his own opinion, he still trusted these two talented students. After a moment of reflection, he said to Qi Zhicong:

This chapter is not over yet, please click on the next page to continue reading! "Xiao Qi, please contact the Institute of Mathematics and ask them to provide a complete mathematical model, including the entire modeling process document, for us to check."

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

Generally speaking, it is normal for the other party not to provide mathematical models. 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 said resolutely: "Aren't there people who can understand now? Moreover, their model is wrong, and they have to give it to us both emotionally and rationally. Go ahead. Are you really

Otherwise, I will go through the formal application process with my superiors."

When the juniors communicate, that's called communication. Once the elder steps forward to go through the formal process, it's forceful and can 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 responsible for this mathematical model project at the Institute of Mathematics, had a bad time because of the competition for academician spots. There is a big question mark as to whether there is a "friendship" between the two.

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

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

…

Xia Academy of Sciences, Institute of Mathematics.

Professor Lan Weifeng, the head of the "Mathematical Modeling Group 3", was sitting in his office, flipping through the latest mathematics journals, when the sudden ringing of the phone interrupted his thoughts.

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

The doctoral student knew that Professor Lan had a strong personality and did not dare to be rude in the slightest in front of such an elder. He said with some awe:

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

Professor Lan Weifeng became even more uncomfortable when he heard the name "Duan Yonggong". Originally, he was 60% sure that he would be elected as an academician this year. However, Duan Yonggong, who was presiding over an important national scientific research project, appeared halfway, making him

The probability was suddenly greatly reduced.

Therefore, Lan Weifeng has been in a bad mood for the past few months. He snorted:

"What kind of mathematical model does a group of people engaged in marine soil mechanics want? Didn't I say before that I don't have to agree to it in the future?"

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

"Is there a mistake?" Professor Lan Weifeng said with an angry smile:

"Those who are engaged in marine soil mechanics say that there is a problem with our mathematical modeling? It is simply a big joke. I dare not cross the border to criticize their experiments. They feel good about themselves and interfere with our mathematical models.

? Duan Yonggong, did he become arrogant because he thought he was about to be elected as an academician? Why don’t you look at the nearly a thousand people in our Institute of Mathematics, who work on hundreds of projects a year, and which one made a mistake? "

The doctoral student didn't dare to let it slip, and whispered: "I heard... that it was not Professor Duan and the others who discovered the problem with the mathematical model, but a freshman who went to the laboratory for internship, named... named Qin Ke."

"Qin Ke?" Professor Lan Weifeng was startled, and then his face changed slightly: "The Qin Ke who won the Chen Shengshen Mathematics Prize this year?"

"It should be him... Qin Ke, who is a freshman in Xia State, is also good at mathematics. There seems to be no other one."

Lan Weifeng was silent. If it had been someone else, he would have sneered. But Qin Ke... At the beginning of the year, he relied on mathematical modeling to forcefully send an authoritative figure in the biological world to the eighteenth level of hell. There is no hope of turning around in this life.

.

The mathematical model he is responsible for is related to an experiment with a scale of hundreds of millions. If something goes wrong, it is no joke. He is also jointly and severally responsible.

"Did you say there was something wrong?"

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

He was complaining in his mind, but how could he dare to say it out loud? He hurriedly said: "They sent an email, I printed it out for you?"

Professor Lan Weifeng had a dark face, stood up and paced back and forth, and finally said: "Go and call everyone involved in this mathematical model to the conference room, print out copies of the email content by head, and let everyone study it together.

What is wrong with our mathematical model and why? Really, don’t let me find out which bastard caused this error, it will bring shame to our institute!”

"Yes." The doctoral student was shocked when he heard Professor Lan's murderous words. He didn't dare to say more and went to do it quickly. Before he put down the phone, he vaguely heard an unhappy click of the tongue coming from the other side:

"That kid, why did you end up in Duan's laboratory? If you want to do an internship, wouldn't it be better to come to our Institute of Mathematics?"

…

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 they had severely punished the relevant careless researchers?"

Qi Zhicong knew how arrogant the people at the Institute of Mathematics were. Even if his boss, Professor Duan, came forward, he might not be able to make them bow their heads and admit their mistakes. Unexpectedly, they actually admitted it in less than an hour.

question, and have the relevant personnel been punished?

The sun rises from the west?

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

only……

"The compressed package is encrypted? Do you need Qin Ke to call and tell you the password? What is Professor Lan doing?"

Qi Zhicong did not dare to make the decision on his own, so he ran to Professor Duan to report.

Professor Duan understood as soon as he heard this. Professor Lan refused to bow to him and was playing Guan Yu's trick of surrendering Han but not Cao.
To be continued...