Morning, 9:30.

When Du Songtao walked into the office drinking coffee and watching international news, he found Li Zheng and a guy with a very long head lying on his desk.

Staying up late and working overtime?!

How can such a thing be done?

Jun Songtao walked to Lin Yujing's workstation for the first time.

found that Lin Yujing was also sleeping on her stomach!

No, no, she also worked overtime?

It shouldn't be, it's just a regular tummy sleep.

"Ahem......" Jun Songtao coughed lightly.

And no one paid any attention to him.

Du Songtao had no choice but to walk to the desk, and just as he was about to wake up Li Zheng, he saw a printed report on the desk.

He put down his coffee cup for the time being, flipped through the report, and scanned it.

Then there was a staring.

Then I turned faster and faster, and went straight to the last page.

Then, there was a long stagnancy.

If that's the case......

So now should it be ......

He subconsciously turned around and wanted to rush into Zhu Mingyue's office.

But the pace soon slowed down again.

The student is a student, and he still can't do this kind of thing.

He quickly returned to the table and woke up Li Zheng and Liu Rui with a report.

Without waiting for the two to speak, Zhu Mingyue pointed and reported.

"I don't understand the algorithm, just tell me how sure you are. ”

After Li Zheng got up for a short time, he shook his head and straightened his hair.

"More than 95 percent, and it can be verified immediately. ”

"We don't have the ability to test, and we have to get the team from the Sixth Academy to come, which takes a lot of energy. Du Songtao waved the report and said, "I will immediately find Zhu Mingyue to open a plenary meeting, if it is denied, a few of us will become a big joke." ”

"No, Chief Engineer Du. Liu Rui also put on his eyes at this time and got up and said, "Even if our conclusion is wrong, this matter is not ridiculous at all." ”

"Understood. Du Songtao patted the two of them separately, and said, "Wait for my news." ”

With that, he hurried out of the office.

Five minutes later, the entire YF-87 crew was notified of an emergency meeting.

When Du Songtao came back, Li Zheng and Liu Rui were finishing up the PPT for the report, and Lin Yujing was still sleeping on her stomach.

"How's it going?" Juniper hurriedly walked to his desk, "Do you have a problem with the report?"

"Li Zheng's report is fine, my mind is already empty. Liu Rui gestured blankly, "My mind is full of curves now, and I can't even understand what Li Zheng is saying." ”

"You do the main work, come on. Li Zheng saved the PPT and turned his head and said, "And this aspect is the field of the seventeenth institute, I don't want to be too presumptuous, a bunch of teachers will have a not very good feeling when they listen to me......

"But I really ...... It's hard to even say a whole sentence now,......" Liu Rui squeezed his eyes and rubbed his forehead, "It's the first time in my life that my brain has been overloaded like this......"

"Alright, I'll decide. Du Songtao pointed to the computer and said, "Li Zheng is responsible for reporting, and Liu Rui's name is written in front of the PPT, OK?"

The two looked at each other for a while, and then reluctantly nodded.

"Good. Jun Songtao clapped his hands and pulled the two of them up, "Now, you two go wash your faces, smoke yourself a few mouths to sober up, I'll pour you coffee, if it can be verified as you concluded, then I believe-"

"Starting today, Huang Er is going to fight back. ”

......

At 9:39, the last team member hurried to the conference room.

The notice only mentions an emergency meeting, without much detail, and there is no prior news, which fills most people with a sense of mystery.

In front of the long table, Zhu Mingyue and Du Songtao were discussing nervously, while Li Zheng and Liu Rui were on the side of the projection, debugging the projection with a sluggish expression.

At 40 minutes, Zhu Mingyue and Du Songtao nodded to each other and put the discussion on hold for the time being.

Zhu Mingyue omitted those opening remarks, and spoke directly after putting down Juniper Tao.

"The Du general engineering team has unearthed breakthrough results in data analysis. ”

"There's a lot of involved, and I didn't have time to look at it in detail. ”

Next, we will directly listen to Li Zheng's report, discuss its accuracy on the spot, and arrange follow-up work. ”

When the people in the venue heard this, they could not hide their disappointment.

During this period of time, Du Songtao did put forward some ideas at regular meetings, but either they were already argued as no, or they were not qualified to be argued at all.

Although he is an expert in satellites, he is still too inexperienced in the engine line, and he is quite a bit of a paper talk.

To exaggerate, it's like two people hitting LOL with their mouths, how do I move I use Q you and something, according to his self-logic, it is barely established, but in practice it is not like that at all.

It is not difficult to hear from Zhu Mingyue's words that he himself clearly set aside his responsibilities and was purely dragged by Jun Songtao to hold the meeting.

Airborne layman is like this, wasting everyone's time.

After seeing that the reporter was Li Zheng, most people were undoubtedly even more disappointed.

Even though you're at the end of the road, do you really want to do such a ridiculous thing? Listen to a high school student here?

Li Zheng didn't notice these at all, just simply cut his hair and stood up.

In order to cheer up, he even wet his hair, and now he belongs to a greasy handsome, somewhat overtime old programmer.

"Let me be clear first that this is not exactly what we do in our group. ”

"It was Liu Rui and the members of each group who completed 99%, and I only completed the last 1%. ”

Let me briefly describe the process and conclusions. ”

Li Zheng said and pressed the controller, and a curve graph immediately appeared on the screen.

"It's a suspicious frequency curve. ”

"There are thousands of such suspicious curves in every test run. ”

"I've been looking for its eigenvalues, using some algorithm to eliminate distractors, finding the most suspicious parts, and digging deeper. ”

"But when it comes to engineering calculations, I have limited personal ability and have never found a reliable method. ”

At this time, Liu Rui sent these ...... These, and these ......"

Li Zheng said and clicked the controller a few times in a row, and suspicious curves were laid out on the screen.

"We've analysed and studied these curves. A team leader raised his hand and said, "Liu Rui's work is very hard, but we have not found any reliable conclusions following these clues, and they are most likely just normal vibration noises during engine operation." ”

Li Zheng nodded.

"Yes, just take out one of the analyses and it will be like this, but it will appear periodically, not light, not heavy, not deep or shallow. ”

"If you analyze it in isolation, it's like solving a 12-element equation based on just one line of equations, and you won't get any results. ”

"So, we need to list at least 12 equations and link them together. ”

Li Zheng clicked the remote control again.

The tiled curves are stacked on top of each other.

The audience then looked sideways, and many disappointed people followed suit.

The people present are experts in this field, and although it is just a bunch of curves, they already feel the cyclicality and correlation contained in it.

Li Zheng then tapped again, and along the superimposed shadow of the 12 curves, a clearly marked red curve appeared, and the related matrix and its dense mathematical expression appeared below it at the same time.

"That's the solution. Li Zheng circled more than half a page of mathematical symbols on the screen, "Teachers can take a brief look, and we will turn the page again without clear doubts." ”

At this point, there are not many people present who can understand.

One of them, a young engineer, raised his hand.

"We've tried similar work, but you have to know that from the suspicious data that Liu Rui has found, any 12 random ones are extracted for correlation analysis, and there will be some conclusions, and such an analysis method does not necessarily prove anything, considering that he has summarized nearly 200 curves, which is not even likely to prove anything. ”

"These 12 are not something I picked up casually, but are extracted using the algorithm of the optimized fault model. Li Zheng carefully explained.

"Depending on the parameters I entered into the system, it can extract 1, 2, or even 100, and 12 is just a random number that I can easily express here. ”

"In the actual analysis, the parameter I finally chose was 67, which is roughly equivalent to solving a 67-yuan equation. ”

"Of course, my current expression is still very superficial, which involves machine learning and data analysis, if the teacher is interested, you can read the three papers published before the eleventh institute. ”

The Engineer shook his head: "I know you can't go into detail here, but the problem is that this step of argument is very important, and if you don't convince everyone here, it will be difficult for everyone to accept your conclusions." ”

Li Zheng nodded confidently: "It's okay, my conclusion can be verified by actual measurement." ”

The engineer laughed and said, "Do you mean let's build another engine based on your conclusions and pull it for testing?" I don't want to offend you, but we really don't have the time and resources to do that......."

"No need to rebuild, no need to test the car, you can verify it today, at most half a day is enough. Li Zheng spread his hands helplessly, "Actually, I didn't expect to use such a simple report to make everyone accept my conclusions." This report is just a reason to examine my conclusions. ”

"......" the engineer shook his head and raised his hand, "You go ahead for now, let's assume that your failure curve is true for the time being." ”

"Thank you teacher for your accommodatingness. Li Zheng said, "To be exact, this conclusion is not a failure curve, but a curve that describes the failure curve, and the equation that describes the equation is equivalent to reducing the failure analysis by one dimension and solving it into a purely mathematical problem.

As soon as the screen turned, an even more terrifying super matrix diagram that no one at the scene could understand appeared.

"That's the mathematical description of the eventual failure. Li Zheng nodded and said, "I'm not showing off my mathematical skills to confuse everyone, I just want to show more reliable arguments and deepen the reasons for everyone's arguments to my conclusions." ”

"Then let's ...... this description slightly."

"That's what it ...... become"

"Although it is difficult to understand, this is actually one of the mathematical expressions of the two-dimensional projection of the shaft system fault point......"

"So now...... We need to restore this projection to the shafting according to the structural parameters of the shaft system......"

"In short, it is a re-ascension ......"

"You can understand this process as a computer operation process, first convert the characters we input into binary sequences, and then output them as characters that we can understand......"

"Don't show that expression, I'm really not pretending to be ......"

"The last mathematical expression is very simple, I believe everyone will be able to understand ......"

With Li Zheng another point, a few lines of moving calculations appeared.

"Probability distribution?" one had already shouted, "a point-like probability distribution within a quasi-cylinder, to be exact." ”

Li Zheng was also very moved, and finally someone could understand.

A little more, he finally appeared with a figure that even a schoolboy could see.

It was a model of the YF-87 turbine shafting, with numerous small red dots on the surface and inside.

"There are a thousand red dots on this picture. ”

"They hit the shaft in a probability distribution. ”

"The denser the red dots, the more likely it is to have problems, and the more sparse it is, the less likely it is. ”

"That's all I can do. ”

Everyone looked at the engine, which seemed to have been hit by countless quanta, and fell into a heated discussion for a while.

Including Zhu Mingyue, he also probed to Jun Songtao.

Before Zhu Mingyue could speak, Jun Songtao had already raised his head.

"I know what you're going to say, don't ask me, I don't have time to understand the ones in between. Du Songtao asked, "Assuming that Li Zheng is right, will this conclusion help to improve the engine?"

"The assumption is right...... Zhu Mingyue couldn't help but purse his lips when he looked at this picture, "The root of the disease has already been sent to us." ”

During the discussion, one person raised his hand and said, "If this is the probability distribution, the conclusion is obvious...... The question is, how do we believe that this conclusion is reliable? You just said that it can be verified today?"

"Yes. Li Zheng nodded, "This model is not only valid for the three test runs in front of us, but also for every previous test run. ”

"In what was once a 30,000-second test, I believe the problem has already been exposed, but it is too small to meet our alertness threshold.

"But I'm sure that the probability of exposure is positively correlated with the environmental difficulty parameter. ”

"Although I don't know as much about engines as the teachers present. ”

"But I'm confident that I'll make a hypothesis here—"

"Every test run before, every engine, had different degrees of breakage. ”

"Maybe it's just a crack that's so small that it's invisible to the naked eye. ”

"But it must exist, and it's right in front of our eyes. ”

"At this moment, we still have four complete engines in the factory, which have undergone varying degrees of test runs, and the conclusion is that they are all 'stable operation'. ”

"Now, go to the factory and take them apart. ”

"There must be cracks. ”

"If you can't find it, I promise to disappear from here immediately, and it won't take up any more time and resources. ”

At the end, Li Zheng bowed deeply.

"It's just a shallow study, and it's taking up everyone's time, sorry. ”

There was silence.

All eyes looked at Zhu Mingyue.

After thinking for a while, Zhu Mingyue looked at the leader of the maintenance team: "I remember that there was also an inspection after the test run before, right?"

The team leader hesitated: "Yes, after each test drive, it will be fully inspected, and no cracks have been found." ”

"What level of inspection?" Li Zheng asked, "Is it disassembled?"

"One was dismantled, no cracks were found, and the rest were fully electrical and monitoring checked. The team leader looked at Li Zheng, "The result of the full demolition should be the same......"

"How do you know if you don't try?" Li Zheng requested, "If you can't see it, use a magnifying glass, and if you can't see it, you can use a microscope, there must be, you can only work stupidly when you are exhausted, this trick was taught to me by Liu Rui, he said that this is the spirit left by the older generation of the seventeen schools." ”

The leader of the "......" group was speechless and turned to look at Zhu Mingyue.

Zhu Mingyue almost didn't think about it, and immediately took the case.

"The cost of verification is low, and it's worth a try. ”

Most nodded convincingly.

If Li Zheng's conclusion needs to be verified by another engine, it is certainly impossible to satisfy him.

But if you just check the existing engine, a few hours will be enough.

As a joke, it's a big deal to have a magnifying glass in your hands.

Seeing everyone's reaction, Zhu Mingyue also had some confidence, and nodded Zhenzhen:

"Before arranging work, I will talk about Li Zheng. ”

He said that if he couldn't find the crack, he would leave. ”

"I don't approve of this. ”

"Here, I don't care what education you have, you are the top expert in data analysis, all your work is here, no one questions your attitude and ability, even if you point in the wrong direction, don't be afraid, I've been wrong dozens of times, don't sit here?"

"As soon as we met, I said, we are a family, don't be very antagonistic. ”

"So Li Zheng. Zhu Mingyue stared at Li Zheng and nodded, "Can you take back your words?"

The leader of the maintenance team raised his hand: "That's it...... You scared the hell out of me...... They are all brothers, so there is no need to ......"

"Li Zheng, each of us wants to prove that you are right. The leader of the test team also nodded, "Whatever delay does not delay time, it is all a family, where there is a road, we will rush there, don't say that kind of thing." ”

"If everyone makes a mistake and has to leave, then the space system is afraid that no one will be left. ”

Under everyone's friendly comfort, Li Zheng also wiped his eyes.

"I'm sorry...... I was excited just now, I didn't sleep last night......" Li Zheng smirked and scratched his head, "Take it back, don't talk about it in the future." ”

"Don't talk about you, you see Liu Rui's eyes are straight. Zhu Mingyue pointed to the sluggish Liu Rui next to him and said, "Hurry up and rest for a while, as soon as the result comes out, you are busy." ”

However, Liu Rui's eyes were still straight, and he didn't seem to even hear this sentence, until everyone laughed before he reacted.

Soon, nearly half of Zhu Mingyue's people were arranged to go out.

Most of them rushed to the western suburbs test site, aiming for two engines that had undergone thousands of seconds of test runs and were "smooth and intact".

A small number of them were sent to the original factory in northern Hebei to inspect the remaining two units that had been returned to the factory for maintenance.

In fact, this work can be handed over to the workshop engineer to do, but Zhu Mingyue is ready to pick up the "magnifying glass" for a long time to inspect and carefully inspect, the magnifying glass here is of course not a real magnifying glass, but a series of measurement and control instruments.

The good news is that an engine from the original factory in northern Hebei is being opened for maintenance, and the original mechanic undertook the task of dismantling the machine for fine inspection as soon as possible.

After a series of arrangements were over, Li Zheng answered some colleagues' questions again, and it was already half an hour later.

At this time, Li Zheng seemed to have fought a tough battle, and his mind that had been tense all night was finally relaxed.

As soon as he was angry, he collapsed weakly in his chair.

At this time, Zhu Mingyue also fully understood Zhao Zhenhua's bet.

Although winning or losing is unpredictable, it is indeed worth the bet.

Zhu Mingyue got up in person and walked to Li Zheng's side.

"Li Zheng, you also go and take a rest, we have already fallen a lot of people, and now we must save our strength. ”

"Yes...... Li Zheng got up and said, "But ...... How could I possibly sleep now......"

"That's right, let's take advantage of the heat. Zhu Mingyue nodded, "No matter what the result is, your analysis method has its value, the next work, I have arranged for you, systematically summarize your method, and organize people who are engaged in data to learn when you have time, and return it to the database in the form of documents for reference in follow-up work." ”

"This one does. Li Zheng smiled, "I didn't expect to start holding back papers here." ”

"No, no, no, this is too central to be published. Zhu Mingyue held Li Zheng's shoulders and said, "But its value must be higher than that of most papers, no matter what the result is, I will find a way to give you no less feedback than the publication of the core paper." ”

"This really doesn't need to be ......," Li Zheng said with a haha, "It's enough to be able to connect with Harbin Institute of Technology as soon as possible." ”

"Huh?" Zhu Mingyue asked, "If this conclusion is correct, do you still need them?"

"It's still needed, and it's needed even more. Li Zheng Zhenzhen nodded, "At most, I have just found a way, and if I want to continue walking, I must also need the support of top-notch engineering calculations." ”

"Understood, don't worry, the documents have been sent to the first hospital, and Secretary Zhao will personally approve it. ”

As he was talking, Jun Songtao, who had been playing soy sauce for a long time, came over.

"Lao Zhu, are you robbing my person?"

"Alas, it's all a family, what yours and mine. ”

"Don't come to this set!" Du Songtao also shook his head with laughter, "Unexpectedly, my generation of grandmasters didn't move them for a long time, but your kid made a bunch of calculations for them to ......."

"Coincidence, coincidence. Li Zheng patted Liu Rui, who was in a daze next to him, "Really, 99% of the work is done by him, and I just play the level of an ordinary data analyst." And his content happens to coincide with my work during this time, and the two of us are on the same page, just one point. ”

"What so many coincidences. Du Songtao sighed, "You kid can still sit still, drill in one direction, you have to drill to a sufficient depth first, before it is possible to have a feeling for Liu Rui's data, and it is possible to make these things out in one night." I have to admit that I probably got the wrong way of thinking about this matter......"

As he was talking, Zhu Mingyue's phone rang.

As soon as it was connected, Zhu Mingyue shouted out.

"Are you sure?!"

"Okay, send me the picture. ”

"Check the second one as soon as possible. ”

Zhu Mingyue put down the phone and rushed out of the conference room and shouted.

"You don't have to go, you're all back!"

"Verification is over!"

"Start the second zero!"

"Two and a half months, we still have the last two and a half months!"

There was a brief silence in the office area.

Three floors of cheers followed.

"Are those machines really cracked?"

"It's obviously a malfunction, why am I so happy!"

"I thought it was magic, but it turned out to be math. ”

At this moment.

Lin Yujing, who was sleeping on her stomach in the office, suddenly straightened up.

"Hmm...... What time is it...... What about people......"