Suddenly, cross-domain large-scale learning.

When you don't learn, you feel terrible.

And once you really learn.

It's just going to feel more terrifying.

And what Li Zheng has to deal with is not the exam, but the real come.

His first step was to reach the level of a bachelor's degree in computer science.

As a veteran programmer, this is not difficult.

The second step is to reach the level of a master's degree in machine learning.

This one......

Actually, it's not that hard.

It's just that the master is also divided into the master of touching the fish and the master of the big guy.

As a master's degree in fishing, you can successfully graduate through the exam, and you can find a job just as badly.

As for the master's degree, it is necessary to master a large amount of core knowledge in the major during the learning stage.

This includes, but is not limited to, probability theory, statistics, approximation theory, convex analysis, algorithm complexity theory......

The requirements for mathematics have exceeded the sum of all the competitions that Li Zheng participated in before, which is about equivalent to the learning amount of 80 biology national funds.

Under this level of mathematical pressure, Li Zheng's study time of just over 100 hours a day is actually insufficient, and he should have been targeted by Zhuangzi even worse.

What I didn't expect was that in this desperate intensity of learning, a little student movement that had been very unintentional played a role.

【Learning Talent: Math Brain】

[In the mind, the problem can be transformed into a mathematical problem as much as possible, and with terrifying neural efficiency, the possible calculation can be completed.] 】

This talent of reconstructing mathematical thinking under the guidance of solving its conflicts, Li Zheng could only feel it in mental arithmetic and quick arithmetic before, and the initial intuitive feeling was just to enhance computing ability.

But at this time, with the deepening of mathematical research, when I infiltrated various groups and watched some masters and doctors communicate, I found that the difficulties such as Cholesky decomposition, Laplace matrix and normalized Laplace matrix, which had plagued everyone for a long time, were just pushed along the river and solved easily.

On the other hand, as the mathematical foundation becomes thicker and thicker, and then looking back at the existing algorithms given by Eleven, it is naturally getting smoother and smoother, and occasionally some optimization ideas will burst out.

Unconsciously, what he said when he first met and resolved his conflict did not fade with time, but became clearer and clearer-

"Learning mathematics well, learning as much as you can, not only in competitions, but also in the future. ”

I'm learning, Mr. Xie.

However, even if you learn the master's level of a big guy, it is only the second step.

The third step is practical application, which can use this knowledge to participate in the work and actually improve the fault diagnosis algorithm.

This requires a lot of project experience accumulation, and it takes 996 half a year to get started.

But for some people, you're still crawling inside the door, and she's already like a monster and she doesn't know when to get in.

[There is a youkai, every time you step on a floor, you find that she is still on top of you. 】

【——Lin Yu Jing Demon】

After learning the content that Li Zheng did not have 120 years of, before Li Zheng reached the master's level, Lin Yujing sent [Engine Failure Optimization Based on XGBoost and Autoregressive Model] and [Liquid Rocket Engine Fault Diagnosis Based on Comprehensive Fuzzy Clustering Algorithm] to Li Zheng at 5:50 pm on the third day of internship.

"I ...... I haven't learned it yet......" Li Zheng looked at the algorithm documents that he had put together, and his hand holding the mouse trembled a little, "Do you know what these things are?"

"I don't know exactly, but I don't need to know the details. Lin Yujing kindly helped him pull the document to the bottom, "The following are some related papers, I only use them based on the conclusion, hard work for you to figure it out." ”

"It's going to take a week to figure out any of them, okay? ”

"Ah, why don't you get excited?" Lin Yujing laughed, "Didn't you finish learning three books in one day?Isn't it that I can't learn you?You are learning~~"

“...... Damn, let's learn. Li Zheng gritted his teeth and said, "Don't you fool me, are you sure that these two directions are feasible?"

"At least it's better than the current ones. Lin Yujing pointed to a row of papers on the screen and said, "The premise is that the data and results given by these papers are not flooded." ”

"Good. Li Zheng rolled up his sleeves and piped, "Try to figure it out today, and then find Eleven to ask for a test server." ”

"In addition, it is possible to do PSO optimization within the existing system. Lin Yujing moved the mouse to another document, "These are the papers and technical documents you need, I didn't read them carefully." ”

"Enough is enough...... Li Zheng hurriedly said, "Let's start with these three paths......

"That's it, I'm still going to get the negative selection method, and also, have you learned the morphological credit type?" Lin Yujing's eyes narrowed, "I can't feed you." ”

"When you're full, you're going to break it. Li Zheng hurriedly waved his hand, "Let's go play minesweeper for a while...... By the way, recently my mom was helping with science and technology construction in Africa, and my dad went to participate in a ...... What will be the international neurosurgery, there will be no one at home for three or four days, and Wangcai may be starving to death, or he will be drowned by his own, and he will have time to take care of it. ”

"!!" Lin Yujing collapsed instantly, "You guys...... How can you bully her like that......"

"I'd like to go back and take care of it, but it's the only place here that I can connect to a test server. Li Zheng said and took out a bunch of keys from his bag and slapped them on the table, "The keys are for you, help me see if she still has vital signs." ”

"I ...... I'll go to your house by myself......" Lin Yujing looked at the straight man's key chain with only a pure iron ring, and after being entangled for a moment, he suddenly took it away again, "It's all for cats, don't think about it much!"

"When is it, where do you have the heart to think about anything else? Li Zheng returned to the screen, and suddenly turned his head again, "By the way, don't go through my drawer." ”

Lin Yujing was overjoyed when she heard this, and hurriedly carried her schoolbag: "Don't turn it over, don't turn it over~~"

"No...... Your expression has been completely exposed......" Li Zheng got up and was about to grab the key, "Give it to me, I'll take that little key off......"

Lin Yujing instantly protected the key, and escaped with a kick.

"I~will~take care~good~cat~cat~of~"

"......" Li Zheng sat back at his workstation angrily, gritted his teeth and muttered, "Forget it...... Sooner or later, I'll find out ......"

......

At the same time, the regular meeting of one hospital and one office building was held as scheduled every half week before. ，

The meeting was chaired by Zhao Zhenhua, presided over by Chen Hongbing, and participated by Shen Tinglan and the team leaders.

As in the past, the groups reported progress towards zeroing.

As always, the person with the biggest eye bags, Zhou Chenglong of the technical group, took the lead in reporting.

Although he was sleepy and tired, he still patted off the broken hair on his scalp and spoke loudly.

"The technical team's data analysis work is nearing completion, with 87% of the planned progress completed, about a day and a half ahead of the planned time. ”

"So far, two high-probability failure models and four medium-probability failure models have been proposed together with the Sixth Academy. ”

"Of these six fault models, five are pure engine failures, and the Sixth Institute has tested four of them, one of which has basically completed the reproduction of the Huang Er fault. ”

"The last failure model is due to the overall design of the rocket, and we need to start the test at the test site in the western suburbs, where we apply for test start preparation. ”

Zhao Zhenhua suddenly asked: "What does it mean that the fault is basically reproduced?" ”

Zhou Chenglong said: "In the reproduced failure, the parameters of the engine basically coincide with the situation before Huang Er's shutdown, but not completely, after all, the actual lift-off situation is more complicated, and the data will be different for each lift-off." ”

"Then I'll ask a different question. Zhao Zhenhua then asked, "What is the probability that this failure model really matches the previous accident?"

Zhou Chenglong muttered: "More than 60%." ”

Zhao Zhenhua's expression drooped visibly, he wanted to say something, but he also knew that it was not easy for everyone, and he didn't want to hit people.

"Secretary Zhao ......," Chen Hongbing explained on the side, "because Huang Er's arrow body was not salvaged, we can only use various models to reproduce the accident now, just like the black box in the plane accident, we can't get the black box of the rocket, we can never be 100% sure of the cause of the accident, 60% is indeed low, but the limit is around 80%." ”

"The question is, how did this 60% come about?" Zhao Zhenhua clapped his hands and said, "When the time comes to face the zero review team, it can't be said that it is Zhou Chenglong's personal judgment, right?"

When Chen Hongbing heard this, he hurriedly glanced at Shen Tinglan and asked her to come over.

Shen Tinglan spoke.

"There is a set of criteria for the review of fault recurrence. ”

"To put it simply, it is to compare the data of fault reproduction with the data in the actual accident mathematically, and finally obtain a reproduction accuracy. ”

"According to the data standard of fault reproduction, it can only reach 60% for the time being. ”

"But for me personally, I'm almost 99% sure of the accident model. ”

"I understand that. Zhao Zhenhua nodded and said, "I have seen this accident model, it is indeed very intuitive, and it is also in line with my experience in aerospace for so many years, but the problem is that only 60% of it meets the evaluation standards, even if this is really the cause of the accident, but it can't pass the review, and the work can't be continued." ”

"It doesn't have to be ......"

Shen listened to what Lan was about to say, but Chen Hongbing suddenly raised his hand, interrupted her, and turned to look at He Zhongrui.

"Everyone has been working very hard recently, and after the technical group, let's talk about it alone, and the test team will report first, and after the report, go to a group and take a break. ”

Shen Tinglan didn't say anything more, and Zhao Zhenhua also understood.

It's just that He Zhongrui was suddenly named and a little flustered.

"The test team is here...... The overall maintenance of the proving ground has been completed and is ready for commissioning. ”

"In addition, the priority of our group is still to cooperate with the technical team to check the test data, six people work in two shifts, plus two interns, and this week we grabbed 5% of the progress. ”

"Oh?" Zhao Zhenhua smiled, "Those two children can really be used?"

"Top use...... That's too top-notching secretary......" He Zhongrui's expression gradually became complicated, and he couldn't tell whether it was sweet, bitter or sour.

It stands to reason that he should at least be happy if he has two more people who can do the work, but he seems to be in hell, tormented by a cauldron full of lemonade, and the smell of his whole person has become very strange.

"Eh, you said you were He Zhongrui. Chen Hongbing pointed at him and smiled, "You still don't want to give it to you?"

"This ...... Director Chen, it's hard to say......" He Zhongrui said with a bitter face, "To tell you the truth, it's not the opposite, our test group is small, and we really can't accommodate these two gods......"

"Hahaha. Zhao Zhenhua also laughed rarely, "This is not a backword?"

"It's really not ......" He Zhongrui scratched his head and said, "You don't know, what I sent to them were our 12-hour shift, and then what...... Li Zheng is always inexplicable, I don't know when, I finish the work of the two together, and then they ...... the rest of the time"

He Zhongrui said, swallowed and spat, raised his head and said, "The rest of the time, it's all on the show...... are all learning. ”

Shen Tinglan suddenly glared: "What did you just say to show off?"

He Zhongrui was stunned.

This is to chat privately, and he has already scolded the dog couple.

But after all, this is a meeting.

One of them is still the leader's baby girl......

Or don't tear it down in person.

He Zhongrui had no choice but to hesitate and say, "Show it...... It's to show and learn at the same time, show to learn, learn to show ......"

Chen Hongbing asked with a smile: "What's the matter, I was hit by a high school student, and I can't speak well?"

"Hmm......" He Zhongrui is an honest man, and after thinking about it, he nodded heavily, "That's it, director." ”

"What?"

"I was hit by a high school student, and I can't talk well. ”

"Haha. Zhou Chenglong laughed first, "You kid also has today!"

"......" Chen Hongbing was also a little stunned, and hurriedly asked, "Then what are they studying?"

"Algorithms for failure analysis, artificial intelligence neural networks, or whatever...... I could understand it for the first half of the day, but I couldn't understand it after sleeping...... Now I can't even understand what they say......" He Zhongrui said with a bitter face, "It's like I worked hard for two or three years to complete my master's degree, and then others finished studying in two hours......"

"That sounds a bit interesting......," Zhao Zhenhua sighed as he rubbed his stubble, "Now these high school students are too motivated, and after analyzing the data for half a day, they know how to take the initiative to find a way to break through at work." ”

"Yes...... This kind of work is not a matter of two weeks a week, isn't it a matter of tossing for several years to barely get to what it is now?" Chen Hongbing asked, "They learn from scratch themselves, and they may not learn anything in a year, right?"

"Hi...... Who didn't think so at first......" He Zhongrui turned to look at Zhou Chenglong and said, "You have a lot of contact with the Eleventh Institute, have they mentioned these two?"

"Eleven ...... Did you mention it...... Wait a minute...... It's them???" Zhou Chenglong's eyes widened, and he was so frightened that he almost jumped up, "It turned out to be them!"

"Why are you so surprised today...... Chen Hongbing snorted, "Is it still too energetic and not saturated?"

"No, no, no, no......" Zhou Chenglong said with a gesture, "I met someone from the 11th Institute that day, and he told me that there are many resources, and even machine learning doctors are recruited by two...... I didn't understand at the time, and he left......"

"......" Chen Hongbing couldn't ask anything this time.

Next to him, Shen Tinglan opened his mouth.

The people in each group didn't know what to talk about.

Zhao Zhenhua, who was more steady, thought for a while and said: "Go and ask the comrades of the 11th Institute, whether the work carried out by these two interns has any practical significance for the current zero, if so, we will find a way to cooperate." ”

As soon as these words came out, He Zhongrui took the lead in being stunned.

To say that they are in the test group and transferred back, it is reasonable.

It's too exaggerated to ask us to cooperate with them, right?

"Why are you still surprised. Chen Hongbing sighed, "I can only think of arranging for them to join the technical group, or Secretary Zhao, who has a high vision." ”

"I can't talk about it. Zhao Zhenhua pursed his lips, "It's just that I've been working for two years longer than you, and I've seen a lot of Qu Cai's things, so let them play to their heart's content first, and then go back to the test team." ”

Next, after the reports of each group were completed, Zhou Chenglong was left alone and continued to talk with Zhao Zhenhua, Chen Hongbing and Shen Tinglan about what he had not finished talking about just now.

At that time, Zhao Zhenhua questioned that only 60% of the failure models in front of him met the review, and I was afraid that it would be difficult to pass.

Just when Shen Tinglan said, "It's not that you can't pass", Chen Hongbing interrupted her on the grounds that she should rest early.

Of course, the actual purpose is not like this, Chen Hongbing wishes that everyone would not rest.

At this time, Shen Tinglan was able to continue.

"This fault data can be done. ”

"It is to repeatedly adjust the parameters and do tests until more than 80% of the parameter combinations that meet the accident data are called. ”

"To put it simply, it is to stick it up according to the accident. ”

"But it doesn't make much sense and it's time-consuming. ”

"The only point is to carry out follow-up work as soon as possible through the review after determining that this is the cause of the accident. ”

"And this matter requires the cooperation of the Sixth Academy, so I don't feel very convenient to speak. ”

After listening to Shen Tinglan's words, several people present fell silent.

Zhao Zhenhua and Chen Hongbing are thinking about the pros and cons, risks and benefits.

Shen Tinglan was waiting for the leader to make a decision.

Zhou Chenglong was simply scared and didn't dare to say it.

After a while, Zhao Zhenhua said to Zhou Chenglong: "Complete the rest of the data analysis as soon as possible, sort out all possible fault models, and then pull the six institutes to discuss it together, and ask all the core technical personnel to make a judgment, if everyone is sure that this must be the reason, then do it." ”

"What if it's not unified?" Zhou Chenglong asked.

"Then continue to argue and test. ”

Shen Tinglan followed and asked, "Secretary, what do you mean by doing it next?"

Zhao Zhenhua smiled helplessly: "Just do it down." ”

After that, he got up, waved his hand at Zhou Chenglong and said: "Jackie Chan, you are working very hard here, but there is no way, speed up, speed up, speed up again." ”

"Yes!"

After the others left, only Chen Hongbing and Shen Tinglan were left to pack up their things, and Chen Hongbing sighed helplessly: "Tell me about you, when you are engaged in technology, your brain is brighter than anyone else, why do you know so much about this with Secretary Zhao......

"What?"

"It's just 'do it down', he said it all, there's no need to ask further. Chen Hongbing said with a smile, "Do you want the secretary to say it himself, 'adjust the test parameters in order to pass the trial'?"

"Oh. Shen Tinglan smiled stupidly, "I just pretended to be a test and came out to review the data, I didn't look for it, right?"

"Alas, I have to teach little by little, it's more tiring than teaching my daughter......" Chen Hongbing then asked, "You have a thorough understanding with me, does it really have to be this fault?"

"Really, that's the only reason. Shen Tinglan sighed, "It's just ...... I'm afraid it's hard for the Sixth Academy to accept it, they are responsible for the engine, and they definitely hope that the problem will happen in the overall structure. ”

"Wait......" Chen Hongbing frowned, "If the Sixth Academy doesn't cooperate, won't the accuracy be able to do it?"

"It should be. ”

"With that 60% accuracy, what is the probability of passing the review?"

“60%。 ”

“......”

......

Seven o'clock.

A figure sneaked into the door of Li's house with a ghostly head.

Ring the doorbell before knocking.

Just to make sure there is no one at home.

However, there are cats in the house.

"Meow woo woo woo ~ ~~"

A miserable and aggrieved cat meow made Lin Yujing collapse instantly.

"Mommy is here...... Mother is here...... "She couldn't care about sneaking anymore, so she hurriedly took out the key and tried it, scolding with hatred, "The surname Li is all scum, all scum!"