Chapter 295

Suddenly, large-scale cross domain learning.

When I didn't learn, I felt terrible.

And once you really learn.

It's just more terrifying.

What Li Zheng has to deal with is not an exam, but a real one.

His first step is to reach the level of Bachelor of computer science.

As an old programmer, this is not difficult.

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

This

It's not that hard.

However, master's degree is also divided into fishing master's and big man's master's.

As a master of fishing, you can pass the exam and graduate smoothly. If you have a big difference, you can find a job.

As for the master's degree, we should master a lot of core knowledge of this major in the learning stage.

Including but not limited to probability theory, statistics, approximation theory, convex analysis, algorithm complexity theory

Among them, the requirements for mathematics have exceeded the sum of all competitions Li Zheng participated in before, which is equivalent to the learning amount of 80 biological national gold medals.

Under the pressure of mathematics at this level, Li Zheng's study time in his early 100 hours a day is not enough, which should have been even worse for Zhuangzi.

Unexpectedly, in this desperate intensity of learning, a little bit of learning movement, which was very unintentional, played a role.

[learning talent: mathematical brain]

[in thinking, we can transform problems into mathematical problems as much as possible, and complete possible calculations with terrifying neural efficiency. 】

This talent of reconstructing mathematical thinking under the guidance of solving the disputes, Li Zheng could only feel this talent in mental calculation and quick calculation before, and his initial intuitive feeling was just to enhance his computing ability.

But at this time, with the deepening of mathematical research, we sneaked into various groups and watched some masters and doctors communicate with each other. Only then did we find that the difficulties such as Cholesky decomposition, Laplacian matrix and normalized Laplacian matrix, which have been bothering us for a long time, are just pushing the boat and solving them easily.

On the other hand, as the foundation of mathematics becomes more and more thick, looking back on the existing algorithms given in the 11th Research Institute, it will naturally become more and more smooth, and occasionally some optimization ideas will burst out.

Unknowingly, what he said when he first met and solved the dispute did not fade with time, but became more and more clear -

"to learn mathematics well is not only a competition, but also an important thing in the future."

Yes, Mr. Xie.

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

The third step is practical application, can use these knowledge to participate in the work, the actual improvement of fault diagnosis algorithm.

This requires a lot of project experience to accumulate, to really 996 half a year to calculate the entry.

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

[there is a monster, every time you step on a layer, you find her still on top of you. 】

[- Lin Yujing demon]

after learning the contents less than 120 of Li Zheng, Lin qiojing sent [engine fault optimization based on xgboost and auto regression model] and [fault diagnosis of liquid rocket engine based on comprehensive fuzzy clustering algorithm] to Li Zheng at 5:50 p.m. on the third day of practice.

"I I haven't learned yet... " Li Zheng looked at the patchwork of algorithm documents, holding the mouse hand a little shaking, "do you know what these things are?"

"I don't know all about it, but I don't need to know the details." Lin Qijing kindly helped him pull the document down to the bottom. "The following are some related papers. I only use them based on the conclusion. It's hard for you to understand."

"It's going to take a week for either one to figure it out, OK?"

"Ah, why not?" Lin Yujing said with a smile, "didn't you finish three books in one day? Can't I learn from you? You are learning ~ ~ "

" Damn it, then learn. " Li Zheng clenched his teeth and said, "don't you deceive me. Are these two directions feasible?"

"At least better than the ones now." Lin Qijing pointed to a row of papers on the screen and said, "the premise is that the data and results of these papers are not filled with water."

"Good." Li Zheng rolled up the sleeve pipe, "strive to understand today, and then find eleven to a test server."

"In addition, it's also possible for you to do PSO optimization in the existing system." Lin Qijing mouse moved another document, "these are the papers and technical documents you need, I didn't take a close look."

"Enough, enough..." Li Zheng hurriedly said, "let's start with these three roads..."

"That's it? I'm going to do negative selection. And, have you learned about morphological typing? " Lin's eyes narrowed, "I can't feed you."

"If I'm full, I'm going to break up." Li Zheng quickly waved his hand, "go and play with mine sweeping." By the way, my mother helped with the construction of science and technology in Africa recently. What did my father take part in There is no one in the family for three or four days. Wangcai may be starving to death, or he will drown in his own excrement. He has time to take care of it. "“！！！” Lin Qijing suddenly collapsed, "you How can you bully her like this... "

"I also want to go back and take care of it, but only here has an intranet and can connect to the test server." Li Zheng said that he took out a bunch of keys from the bag and patted them on the table, "here are the keys. Help me see if she has any vital signs."

"I I'll go to your house myself... " Lin qiojing looked at the straight man's key chain with pure iron rings. After tangled for a moment, he suddenly lifted it away again. "It's all for the cat. Don't think much about it!"

"When is it? Where do you want to think about something else?" Li Zheng this return to the screen, just code two lines suddenly turn head, "by the way, don't turn my drawer."

When Lin Qijing heard the speech, he quickly recited his schoolbag: "don't turn it or not ~"

"no way Your expression has been completely exposed... " Li Zheng got up and wanted to grab the key. "Give it to me. I'll take that little key down..."

Lin Qijing instantly protected the key and ran away with a kick.

"I know how to take care of my cat cat."

"dry..." Li Zheng angrily sat back to his work station and muttered, "forget it In any case, sooner or later we will know... "

……

At the same time, one hospital, one office building, zero routine meetings were held as scheduled every half week. The meeting was held by Zhao Zhenhua, presided over by Chen Hongbing, and participated by Shen Tinglan and other team leaders.

As in the past, each group reported progress towards zero.

As in the past, Zhou Chenglong, the technical team, was the first to report.

Although sleepy and tired, he still patted off the hair that had been broken on his scalp and spoke with full spirit.

"The data analysis work of the technical group is nearing the end, 87% of the planned progress has been completed, and the lead time is about one and a half days."

"Up to now, we have jointly proposed two kinds of probable rate fault models and four kinds of medium probability fault models together with the Sixth Research Institute."

"Of the six fault models, five are pure engine faults, and four have been tested by the Sixth Research Institute, and one of them has basically completed the recurrence of huang-2 fault."

"The last failure model is caused by the overall design of the rocket. We need to start the test at the western suburb test site, and apply for test start-up preparation here."

Zhao Zhenhua suddenly asked, "what is the basic completion of fault recurrence? Explain the basics. "

Zhou Chenglong pointed out: "in the recurrence of the fault, the parameters of the engine are basically consistent with the situation before the shutdown of Huang Er, but not completely. After all, the actual lift off situation is more complex, and the data of each lift off will be different."

"I'll ask you another way." Zhao Zhenhua then asked, "what is the probability that this fault model really conforms to the previous accident?"

"More than 60 percent," Zhou said

Zhao Zhenhua's look dropped visibly. He wanted to say something, but he also knew that everyone was not easy and didn't want to hit people.

"Secretary Zhao..." Chen Hongbing explained, "because Huang er's arrow has not been recovered, we can only use various models to reproduce the accident. Just like the black box in an aircraft accident, if we can't get the black box of the rocket, it will never be 100% sure of the cause of the accident. 60% is really low, but the limit is about 80%

"How can we get the question of 60% Zhao Zhenhua clapped his hands and said, "when it comes to the zero review group, we can't say it's Zhou Chenglong's personal judgment?"

Hearing this, Chen Hongbing hastily winked at Shen Tinglan and asked her to speak.

Shen Tinglan opens his mouth.

"There is a set of pass standards for the review of fault recurrence."

"Simply put, it is to mathematically compare the data of the fault recurrence with the data in the actual accident, and finally get a recurrence accuracy rate."

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

"But as far as I'm concerned, I'm basically 99% sure of this accident model."

"I understand that." Zhao Zhenhua then nodded, "I have seen this set of accident model, which is indeed very intuitive and in line with my experience in aerospace for so many years. However, the problem is that only 60% of it meets the evaluation criteria. Even if this is really the cause of the accident, it can not pass the review and the work can not continue."

"It's not necessarily impossible..."

Shen Tinglan is about to say something when Chen Hongbing suddenly raises his hand and interrupts her. He turns to he Zhongrui.

"We have been working very hard recently. After the technical group's business, we will talk about it. The test group will report it first. After the report, we will go one group and take a break."

Shen Tinglan didn't say any more, but Zhao Zhenhua also understood.

He Zhongrui, however, was suddenly called, a little flustered.

"The test team The overall maintenance work of the test site has been completed, and the test run can be carried out at any time. "

"In addition, our group's first task is still to cooperate with the technical team to check the test data. Six people work in two shifts, plus two interns, and we have achieved 5% progress this week.""Oh?" Zhao Zhenhua said with a smile, "those two children are really able to use it?"

"To use That's great, Secretary... " He Zhongrui's expression gradually became more complicated. It was not clear whether it was sweet or bitter or sour.

It's reasonable to say that there are two more capable people under his command. At least he should be happy. But he seems to be in hell, suffering from a large pot full of lemonade. The smell of the whole person becomes very strange.

"Well, you said he Zhongrui." Chen Hongbing pointed to him and said with a smile, "do you want me to give it to you?"

"This Director Chen, it's hard to say... " He Zhongrui said with a bitter face, "to tell the truth, not to be ironic, our test group temple is small, and it's a little too big for these two gods..."

"Ha ha ha." Zhao Zhenhua also rarely followed with a smile, "this is not a mother's irony?"

"Really not..." He Zhongrui scratched his head and said, "you don't know, what I sent to them is our 12 hour shift workload, and then Li Zheng alone, always inexplicable, do not know when, they finished their work together, and then the rest of their time... "

He Zhongrui said, swallowing, spitting and looking up: "the rest of the time, all in the show They are learning. "

Shen Tinglan suddenly stares: "what did you just say show?"

He Zhongrui was stunned.

It's a private chat. He's been scolding the dog lovers for a long time.

But after all, it's a meeting.

One of them is the leader's baby girl

It's better not to dismantle it face to face.

He Zhongrui had no choice but to falter and haw: "show me It is to show and learn at the same time, show learning, learn... "

When he got to high school, Chen Hongbing asked, "how can he not laugh when he is attacked?"

"Well..." He Zhongrui is an honest man. After thinking about it, he nodded, "that's it, director."

"What?"

"Hit by high school students, can't speak well."

"Ha ha." Zhou Chenglong first laughed out, "you boy also has today!"

“……” Chen Hongbing was a little confused and asked, "what are they learning?"

"Algorithms for fault analysis, artificial intelligence, neural networks and so on I can understand it for the first half of the day, but I can't understand it after a sleep Now I can't understand what they say... " He Zhongrui said with a bitter face, "it's just that I have worked hard for two or three years to finish my master's degree, and then others have finished it in two hours..."

"That sounds interesting..." Zhao Zhenhua rubbed his stubble and sighed, "now these high school students have too much initiative. After analyzing half a day's data, they know how to take the initiative to find a breakthrough in their work."

"But It's not a matter of a week or two. Isn't it just a matter of struggling for several years to make this work as it is now? " Chen Hongbing asked, "they learn from scratch. They don't necessarily learn anything in a year, do they?"

"Hi Who didn't think that at first... " He Zhongrui turned to Zhou Chenglong and said, "you have more contact with the eleven institutes. Have they ever mentioned these two?"

"Eleven Did you mention it Wait It's them Zhou Cheng longan'er glared at him, almost jumping up. "It's them!"

"Why are you so surprised today..." Chen Hongbing hums and laughs, "is it still too much energy, not enough saturation?"

"No, no, no, no..." Zhou Chenglong even rowed and said, "I met people from 11 institutes that day. He told me that one resource is more than one. Even the doctor of machine learning has two or two moves I didn't understand, so he left... "

“……” This time Chen Hongbing couldn't ask anything.

Shen Tinglan's mouth is wide.

No one in each group knew how to talk.

Zhao Zhenhua, on the other hand, was more steady. After thinking about it, he said, "go and ask the comrades of the 11th Research Institute whether the work carried out by these two interns has any practical significance in promoting the current zero return. If so, we will find ways to cooperate."

As soon as he said this, he Zhongrui took the lead.

It is fair to say that they were transferred back from the test group.

It's too exaggerated for us to cooperate with them?

"I was surprised." Chen Hongbing sighed, "I can only think of arranging them into the technical group, or secretary Zhao, which is a high vision."

"Not really." Zhao Zhenhua pursed his lips, "it's just two years more than you did. If you've seen more things about Qu Cai, let them give full play first, and then go back to the test group to endure."

Next, after each group's report, Zhou Chenglong was left alone to continue talking with Zhao Zhenhua, Chen Hongbing and Shen Tinglan about the things that had not been finished just now.

At that time, Zhao Zhenhua doubted that only 60% of the failure models in front of us met the review, and I'm afraid it would be difficult to pass.

Chen Hongbing interrupted Shen Tinglan when she said "it's not necessary to have a rest".Of course, the actual purpose is not like this. Chen Hongbing would like everyone not to rest.

At this time, Shen Tinglan was able to continue to speak.

"This fault data can be done."

"It is to repeatedly adjust the parameters and do the test until more than 80% of the parameter combinations meeting the accident data are obtained."

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

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

"The only significance is that after confirming that this is the cause of the accident, the follow-up work can be carried out through the review as soon as possible."

"And this matter needs the cooperation of the six hospitals. It's not very convenient to speak."

After listening to Shen Tinglan finish, several people present are in silence.

Zhao Zhenhua and Chen Hongbing are thinking about the advantages and disadvantages, risks and benefits.

Shen Tinglan is waiting for the leader's decision.

Zhou Chenglong is simply afraid, dare not say.

A moment later, 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 call the Sixth People's hospital 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 go ahead."

"What if there is no unification?" Zhou asked.

"Then continue to demonstrate and experiment."

Shen Tinglan then asked, "secretary, what is the specific meaning of going down?"

Zhao Zhenhua had no choice but to smile: "do it down."

After that, he got up, waved to Jackie chow and said, "Jackie Chan, you are very hard, but there is no way to speed up, speed up, and speed up again."

"Yes

When the others left, only Chen Hongbing and Shen Tinglan were left to pack up their things. Chen Hongbing could not help but sigh: "tell me about you. When you are engaged in technology, your brain is smarter than anyone else. Ask Secretary Zhao why you know what to do..."

"What?"

"It's" going down. "He said it. There's no need to ask further." Chen Hongbing said with a smile, "do you want the Secretary to say in person, 'adjust the test parameters in order to pass the trial'

"Oh." Shen listen to LAN silly Xi a smile, "pretend to be an experiment to come out to examine data, did not look for specially?"

"Well, I have to teach you little by little. It's more tiring than teaching my daughter..." Chen Hongbing then asked, "tell me the truth. Is it really the fault?"

"Really, that's the only reason." Shen Tinglan sighed, "it's just I'm afraid it's hard for the Sixth People's hospital to accept it. They are responsible for the engine. They certainly hope that the problem will occur in the overall structure. "

"Wait..." Chen Hongbing frowned and said, "if the six hospitals don't cooperate, can't the accuracy be done?"

"It should be."

"The 60% accuracy, what is the probability of a trial?"

“60%。”

“……”

……

It's seven o'clock.

A figure sneaked into Li's house.

Ring the doorbell first, then knock.

Just to make sure there's no one at home.

However, there are cats at home.

"Meow, woo, woo ~ ~"

a sad and aggrieved cat call made Lin Yujing collapse instantly.

"Mom is coming Mom is coming... " She couldn't sneak any more. She took out the key in a hurry and tried it. She scolded with hatred, "all the people surnamed Li are scum, they are all scum!"

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