Chapter 294: Lee's nest

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Suddenly large-scale learning across fields.
When you are not studying, you will feel terrible.
And once you really learn.
It just feels scarier.
What Li Zheng has to deal with is not the exam, but the truth.
His first step was to reach the level of computer bachelor.
As an old programmer, this is not difficult.
The second step is to reach the level of master of machine learning.
This one……
It's not really difficult.
However, the master's degree is also divided into a fish master and a master's degree.
As a fish master, you can successfully pass the exam and just find a job.
As for the master's degree, it is necessary to master a lot of core knowledge of this major in the study 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 the competitions that Li Zheng participated in before, which is equivalent to the learning amount of 80 biological national funds.
Under this level of mathematics pressure, Li Zheng’s study time of just over 100 hours a day is actually not enough. It should have been more miserable for Zhuangzi.
Unexpectedly, in this desperate intensity of learning, the once unintentional learning movement played a role.
【Learning Talent: Mathematical Brain】
[In thinking, the problem can be converted into a mathematical problem as much as possible, and the possible calculation can be completed with terrifying nerve efficiency. 】
After reconstructing his tune and reconstructing the talents of mathematical thinking, Li Zheng could only feel that when he was calculating quickly, the initial intuitive feeling was only to enhance the computing power.
But at this time, with the in-depth study of mathematics, I dived into various groups and watched some master and doctor exchanges, only to find those Cholesky decompositions, Laplacian matrices and normalized Laplacian matrices that bothered everyone for a long time. The difficulty is that in my own case, I just push the boat down the river and solve it.
On the other hand, as the mathematical foundation becomes thicker and thicker, looking back at the existing algorithm given by Eleven, it is naturally more and more smooth, and occasionally some optimization ideas will burst out.
Unconsciously, what he said when he first met him did not fade away with time, but became more and more clear--
"Learning mathematics, how good you can learn, how good is not only a competition, but also very important in the future."
After learning, teacher Xie.
However, even after learning the master's degree, it is only the second step.
The third step is practical application, which can use this knowledge to participate in work and actually improve the fault diagnosis algorithm.
This requires a lot of project experience accumulated, it really takes 996 half years to be considered entry.
But for some people, you are still crawling outside the door, and she already knows when to get in like a monster.
[There is a monster. Whenever you step on a floor, you find that she is still above you. 】
[ Lin Yuejing Yao]
After learning less than 1/20 of Li Zheng, Lin Yuejing, before Li Zheng reached the master level, at 5:50 pm on the third day of the internship, will optimize the engine failure based on XGBoost and autoregressive model ] And [Fault Diagnosis of Liquid Rocket Engine Based on Comprehensive Fuzzy Clustering Algorithm] were sent to Li Zheng.
"I... I haven't learned it yet..." Li Zheng looked at the algorithmic document from Dongpingxi and shook his hand with the mouse. "Do you know what these things are?"
"I don't know it completely, but I don't need to know the details." Lin Yujing kindly helped him pull the document to the end. "The following are some related papers. I only used it based on the conclusion. You have to work hard to figure it out."
"It takes a week for any one to figure it out."
"Ah, why aren't you excited?" Lin Yuejing said with a smile. "Aren't you finishing three books a day? Aren't I learning you but you? You are learning~~"
"...Damn, then learn." Li Zheng gritted his teeth. "Don't lie to me, are these two directions feasible?"
"At least better than the current set." Lin Yuejing pointed to a row of papers on the screen. "The premise is that the data and results given by these papers are not filled with water."
"Okay." Li Zheng rolled up his sleeves. "Try to figure it out today, and then ask the eleven to ask for a test server."
"In addition, it is also feasible for you to do PSO optimization in the existing system." Lin Yujing moved the mouse to another document. "These are the papers and technical documents you need, I did not take a closer look."
"Enough is enough..." Li Zheng hurriedly said, "Just these three ways first..."
"That's it? I'm still preparing for the negative selection method. Also, did you learn morphological classification?" Lin Yuejing narrowed his eyes, "I can't feed you."
"I'm full, and I'm going to break down." Li Zheng quickly waved his hand. "You're going to play mine clearance for a while...yeah, my mom helped to do science and technology construction in Africa recently. My dad went to participate in something... international nerve What will happen to the surgery, if there is no one in the house for three or four days, Wangcai may be starving to death, or he will be drowned by his own feces and have time to take care of it."
"!!!" Lin Yuejing collapsed instantly, "You...how can you bully her so..."
"I also want to go back and take care of it, but only here has an intranet, I can connect to the test server." Li Zheng said, took a bunch of keys from the bag and shot them on the table, "The keys are for you, help me see if she still Are there any vital signs."
"I... I went to your house..." Lin Yuejing looked at the string of straight male key chains with only pure iron rings. After tangling for a while, he suddenly swept away again. "All for cats and cats. !"
"What time is it, where are you thinking about something else?" Li Zheng then returned to the screen, just turning back two lines, "Yes, don't turn over my drawer."
Lin Yujing heard a word of joy and quickly carried his schoolbag: "No turning no turning ~~"
"No... your expression is completely exposed..." Li Zheng got up and grabbed the key. "Give me, I will take that small key down..."
Lin Yuejing instantly protected the key, and fled as soon as he kicked his leg.
"I~will~zhao~gu~good~cat~cat~"~
"Fuck..." Li Zheng sat back angrily and gritted his teeth, "Forget it... I'll know it anyway..."
...
At the same time, an office building in a hospital, a routine meeting for zero return, was held as scheduled every half week. ,
The meeting was hosted by Zhao Zhenhua, chaired by Chen Hongbing, and participated by Shen Tinglan and the team leaders.
As in the past, each group reported on progress to zero.
As always, the person with the biggest bags under the eyes, the technical team Zhou Chenglong took the lead in reporting.
Despite being sleepy and tired, he still took off the hair that had been cut off from the scalp and gave a full spirit to speak.
"The data analysis work of the technical team is nearing completion, and 87% of the planned progress has been completed, which is 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 Six Hospitals."
"Five of these six failure models are pure engine failures. The Sixth Institute has tested four of them, and one of them has basically completed the reproduction of Huang Er's failure."
"The last failure model is caused by the overall design of the rocket. We need to start the test at the Xijiao Proving Ground and apply for test start preparation here."
Zhao Zhenhua suddenly asked: "What is basically the failure to complete the reproduction? Explain'Basic'."
Zhou Chenglong said: "In the recurring failure, the parameters of the engine basically match the situation before Huang Er stopped, but not exactly. After all, the actual lift-off situation is more complicated, and the data for each lift-off Will be different."
"Then I'll ask another 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 hung down visibly, and 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 body was not salvaged, we can only reproduce the accident with various models. Just like the black box in the plane accident, we can't get the rocket. Of black boxes, it is never possible to determine the cause of the accident 100%, 60% is indeed low, but the limit is 80%."
"The question is, how did this 60% come from?" Zhao Zhenhua said with two hands, "When faced with the zero review team, can't you say Zhou Chenglong's personal judgment?"
When Chen Hongbing heard the words, he quickly rushed to listen and listened to Lan Lan, and asked her to speak.
Shen Tinglan spoke.
"There is a set of clearance standards for the review of recurrence."
"In simple terms, it is to mathematically compare the data of the fault recurrence with the data in the actual accident, and finally get a recurring accuracy rate."
"According to the data standard for fault recurrence, it can only reach 60% for the time being."
"But for me personally, I can be 99% sure of this accident model."
"I understand this." Zhao Zhenhua nodded. "I have seen this accident model, which is very intuitive and consistent with my many years of experience in aerospace, but the problem is that only 60% of it meets the review standards. Even if this is true It’s the cause of the accident, but it’s impossible to continue the work without passing the review."
"It's not impossible to live..."
When Shen Tinglan just wanted to say something, Chen Hongbing suddenly raised his hand, interrupted her, and turned to He Zhongrui.
"Everyone's work intensity has been great recently. The technical group will talk about it afterwards. The test group will report first. After reporting the group, go to the group and take time to rest."
Shen Tinglan did not say anything, and Zhao Zhenhua also understood.
It's just that He Zhongrui was suddenly named, a little flustered.
"The test team here... the overall maintenance work of the test site has been completed, you can test the car 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 this week grabbed 5% of the progress."
"Oh?" Zhao Zhenhua smiled. "Which two children can really use it?"
"Ding Yong... That's too great a secretary..." He Zhongrui's expression gradually became more complicated, unable to tell whether it was sweet or bitter or sour.
It stands to reason that there are two more able-bodied people under his hands, at least they should be happy, but he seems to be in hell, being tormented by a large pot full of lemonade, and the whole person's smell has become It's weird.
"Eh, you said you He Zhongrui." Chen Hongbing smiled at him, "I'm not willing to give you someone?"
"This... Director Chen, it's hard to say a word..." He Zhongrui said with a bitter face, "To tell the truth, not to be ironic, our test team is small, and I can't bear the two gods..."
"Hahaha." Zhao Zhenhua also rarely laughed, "Isn't that ridiculous?"
"Really not..." He Zhongrui scratched his head, "You don't know, I sent them both the workload of our 12-hour shift, and then... Li Zheng is always inexplicable, I don't know when , And they finished their work together, and the rest of their time..."
He Zhongrui said, swallowed and raised his head and said: "The rest of the time, all of them are on show...all studying."
Shen Tinglan suddenly glared: "What did you just say about the show?"
He Zhongrui stunned.
This is a private chat, he has long scolded the couple of dogs.
But after all, this is a meeting.
One of them is the leader's baby girl...
Don't disassemble it in person.
He Zhongrui had no choice but to support Wuwu and said, "Show me... just show while studying, show learning, learn show..."
Chen Hongbing asked with a smile: "Why, hit by high school students, will you not speak well?"
"Well..." He Zhongrui is an honest man. After thinking about it, he nodded. "That's it, director."
"What?"
"Surprised by high school students, I won't speak well."
"Haha." Zhou Chenglong smiled first, "Your kid has today!"
"..." Chen Hongbing was also a little embarrassed, and asked quickly, "So what exactly are they studying?"
"Regarding fault analysis algorithms, artificial intelligence neural networks and the like... I can understand it for the first half of the day, but I can’t understand it after a sleep... Now I can’t even understand what they say..." He Zhongrui grumbled. Tao said, "It's a kind of hard work to complete the master's degree in two or three years, and then others will finish in two hours..."
"It sounds a bit interesting..." Zhao Zhenhua sighed, rubbing the stubble. "Now these high school students are too motivated. After analyzing the data for a long time, they know that they are actively looking for ways to break through."
"But... work in this area is not a matter of one week or two weeks. Isn't the eleventh school overwhelming for several years before it was reluctantly made like this?" Chen Hongbing asked. "They learn from scratch, not necessarily one year. What happened?"
"Hi... who didn't think so at first..." He Zhongrui turned to Zhou Chenglong and said, "You have more contact with the Eleventh Institute, have they mentioned these two?"
"Eleven...did you mention...wait... are they?????" Zhou Chenglong stared, almost scared to jump, "It was them!"
"Why are you shocked today..." Chen Hongbing chuckled, "Is it still too energetic and not saturated enough?"
"No, no, no..." Zhou Chenglong said in a gesture, "I met the people of the eleven institutes that day, he told me that one resource is too much, and even the doctor of machine learning has two tricks... I didn't understand it at the time, he left..."
"..." Chen Hongbing couldn't ask anything this time.
Next to Shen Tinglan opened his mouth.
The people in each group didn't know how to talk.
Zhao Zhenhua, on the other hand, is more stable and thinks for a while: "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 return to zero. If so, we will find a way to cooperate."
As soon as these words came out, He Zhongrui took the lead in a daze.
It's fair to say that they flexed their talents in the test group and transferred them back.
It’s too exaggerated for us to cooperate with them.
"How come I was shocked." Chen Hongbing sighed, "I can only think of arranging them into the technical group, or Secretary Zhao, with high vision."
"It's impossible to talk about it." Zhao Zhenhua pursed her lips. "It's just two years more than you and seeing more of Qucai's things. Let them play as much as possible. If they can't, they can't go back to the test group."
Next, after the report of each group was completed, Zhou Chenglong was left alone, and he continued to talk to Zhao Zhenhua, Chen Hongbing and Shen Tinglan about the things that he had not finished just now.
At that time, Zhao Zhenhua questioned that only 60% of the current fault model met the review, which is probably difficult to pass.
While Shen Tinglan stated that "it is not necessary to pass by," Chen Hongbing interrupted her on the grounds that everybody should rest early.
Of course, the actual purpose is not like this. Chen Hongbing is anxious for everyone not to rest.
At this time, Shen Tinglan was able to continue talking.
"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 that meet the accident data are called out."
"Simply put, it's just sticking to the accident."
"But it doesn't make much sense, and it's time-consuming."
"The only meaning is that after determining that this is the cause of the accident, the follow-up work will be carried out through the review as soon as possible."
"And this matter needs the cooperation of the six houses, and it feels inconvenient to speak."
After listening to Shen Tinglan, several people were silent.
Zhao Zhenhua and Chen Hongbing are thinking about the pros and cons, risks and benefits.
Shen Tinglan is waiting for the leadership to decide.
Zhou Chenglong is simply afraid, not dare to say.
After a while, Zhao Zhenhua rushed to Zhou Chenglong and said: "Complete the remaining data analysis as soon as possible, rectify all possible failure models, and then pull the six hospitals to discuss together. All core technical personnel must make judgments. This must be the reason, then go on."
"If not unified?" Zhou Chenglong asked.
"Then continue to argue and experiment."
Shen Tinglan then asked, "Secretary, what do you mean by going down?"
Zhao Zhenhua smiled helplessly: "Just do it down."
After all, he got up and waved his hand at Zhou Chenglong, saying: "Jianlong, you are very this side, 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 left to clean up, and Chen Hongbing sighed helplessly: "When you talk about you, when you are engaged in technology, your brain is brighter than anyone else. This asks Secretary Zhao what he understands so well..."
"what?"
"It's ‘doing it down’, he said it, there’s no need to ask down.
Chen Hongbing smiled,
I also want the secretary to say, ‘adjust the test parameters for the purpose of review’?

"Oh." Shen Tinglan smiled silly. "Just pretend to be a test and come out to review the data. Didn't you specifically look for it?"
"Ah, I have to teach little by little, more tired than teaching my maiden..." Chen Hongbing then asked, "Are you sure to tell me, is this really a malfunction?"
"Really, this can only be the reason." Shen Tinglan sighed, "It's just... I'm afraid it's difficult for the Sixth Hospital to accept it. The engine is their responsibility. They definitely hope that the problem occurs in the overall structure."
"Wait..." Chen Hongbing frowned. "If the six hospitals don't cooperate, can't the accuracy be achieved?"
"should be."
"That 60% accuracy, what is the probability of passing the trial?"
"60%."
"..."
...
It's seven o'clock.
A figure sneaked into Li Zhai's door.
First ring the doorbell and then knock on the door.
Just to make sure there is no one in the house.
However, there are cats at home.
"Meow oh oh~~~"
A miserable cat cry made Lin Yuejing instantly collapse.
"Mom is coming...Mom is coming..." She couldn't care about sneaking anymore, hurriedly took out the key to try it out, and scolded with hatred, "All the surnamed Li are slags, all slags!"