Chapter 290: Who has learned this

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Returning to the computer room, He Zhongrui rekindled his spirits. While taking two interns to visit, he made a general introduction.
In other words, this is the first time Li Zheng has entered the central control room. Although this one is small in size, it is also full of organs.
There are six large screens on the main wall, two of which are video surveillance of the launch site, and the remaining four display a series of parameters and charts that only the insider can understand.
Opposite the screen, there are three rows of desks, and the desktop and portable computers add up to about twenty or thirty.
Although there are not many people in the computer room, they also uniformly wear gray test clothes and special cloth shoes.
It looks like a small launch center.
In fact, the function here is indeed much the same as the launch center.
The most important work of the Xijiao Proving Ground is to be responsible for the overall ground test of the rocket.
To put it simply, the prototype is fixed on the launch pad and allowed to run in situ. The problem is found by collecting and analyzing its operating parameters.
The place where Li Zheng and Lin Yuejing are in front of them is actually just a general control computer room, and the test bed is one kilometer away.
As for the actual test, because of its high fuel cost, it is not very common. Such a test is usually attended by Shen Tinglan and others.
Now the main work of the test group is to reorganize all the test data since Huang Er's project was established, and sort out and analyze the abnormalities that were not considered to be abnormal, and feed them back to the technical team in days.
At the same time, the engine test data of the foreign hospitals, especially the sixth hospital, are also fully inspected, and this part of the workload is really huge.
"Are we responsible for the data of the Sixth Institute?" Li Zheng asked as he walked along with He Zhongrui.
"It stands to reason that they should be responsible for it, but Director Chen insists on getting the data over, and we have to screen it again." He Zhongrui rubbed his eyes and sighed, "Have you read the newsletter about the launch failure?"
"Well, the core-level engine stopped early." Lin Yuejing approached and asked curiously, "Is this really?"
"Haha, my classmates and friends all asked the same question." He Zhongrui waved and smiled, "It's really this, don't listen to any conspiracy theory. The draft will definitely not expose the core technology, but it won't lie."
"Well, that is clearly the engine's problem." Lin Yuejing said, "The engine YF-87 used in the core level was developed by the Sixth Academy. They should be as nervous as ours now."
"What? What 87? What six courtyards?" Li Zheng exclaimed, "How come you suddenly understand this?"
Lin Yujing quickly turned his head and looked at the left: "Did you not read the administrative information and project documents given yesterday?"
"It's 12 o'clock when I get home to take a shower." Li Zheng shook his fists indignantly. "It's you who deserve to learn again!"
"Just watch it on the way home..."
"You are driving on the road, carrying me!"
"Oh, don't care so much..."
He Zhongrui listened a little wrong.
The ears of other engineers who seem to be working seriously are also erected.
The atmosphere in the computer room instantly became dignified and sour.
"I'm taking the liberty to ask..." He Zhongrui swallowed and asked courageously, "Are you two male and female friends?"
"???
"no no!"
This answer is like a refreshing wind, blowing away the dignity of the entire computer room.
Engineers who were already nervous became happy again.
He Zhongrui also smiled with a sigh of relief: "Sorry, sorry, it's up to you two... quite close."
Li Zheng shook his head and said: "It's just normal friendship among classmates."
"There is no friendship." Lin Yuejing added, "It's just a competitive test."
"Haha, hahaha, when it comes to exams..." He Zhongrui raised his glasses and smiled. "All of us here have also passed the exam all the way, and we fully understand the benign competition between our students."
The engineers in front of the screen nodded confidently, and those with glasses lifted up.
People who can sit here, usually in their own schools, are all in the top ten.
However, they are just empty, lonely, and not in the top ten of the soul.
Passionate about exam results, beautiful and lovely female high school student, why didn't I meet that year?
Fortunately, there is a cycle of heaven.
Director Chen did not arrange it.
It's time to show the ignorance of true tyrants to ignorant high school students.
But some people still have doubts.
An engineer who just took over asked sideways: "Which school are they from?"
"Sakura Lake."
"Hey...I thought it must be No. 4 Middle School and Ren Da Fu." The engineer took out the computer in the bag with a smile, "Is the leadership relationship coming?"
"I heard that it was a greeting from the Ministry of Science and Technology."
The engineer smiled and looked up at the duo: "Students of this kind of school still hang the competition results on their mouths, it's pretty cute to think about it."
"Yeah..." The engineer next to him smiled with emotion, "Lao Zi tried his best to get out of the college entrance examination from Sichuan, and looked at the children in the school next to Jijing Park, he really laughed and didn't know how to laugh."
The two smiled at each other and didn't say much.
I believe that soon, there will be an opportunity to show his hand.
In front of the monitoring screen, He Zhongrui briefly explained to Li Zheng those keywords that he did not understand.
The first is the YF-87 engine.
Y, the first letter of the "liquid" pinyin.
F, take the first letter of the engine pinyin.
87 represents its serial number.
Put together, it can be understood as the 87th liquid engine.
There are similar WP (turbojet) type, HS (piston type) and so on.
This YF-87, which marks China's industrial level, was also developed by the Sixth Aerospace Academy.
The Sixth Academy, namely the Aerospace Propulsion Technology Research Institute, specializes in liquid engines. Its products after YF-50 are basically tailored for the Yellow River series of rockets. It can be said to be the largest research institute that cooperates most closely with the First Academy.
At the same time, in addition to the first hospital, the deepest hospital was involved in this defeat.
It stands to reason that the investigation of the internal problems of the engine should be completed by the Sixth Hospital.
However, it is clear that Chen Hongbing is not prepared to fully trust the Sixth Institute in this situation, but to let one test group advance simultaneously.
This led to the extremely heavy task of the limited test team members. It was necessary to study and analyze thousands of completely unknown test data and try to find some clues from it.
"Now this task is about 17% completed, and it will get faster and faster." He Zhongrui said while leading the two to a table full of materials. "These are the necessary knowledge to study engine test data. You have tried for a long time to understand how much you can understand. If it is too difficult, I will arrange other work."
At this moment, an engineer who had just passed through the water looked over and said: "These are too difficult for high school students, or should I come to my side to organize the documents?"
"I don't want to... Director Chen just made a call, let me give them a hard time." He Zhongrui shook his head helplessly, screaming at the two, "To be honest, this part of the work, basically have to do three Four years of talented people, including myself, have also studied for about a week before they can barely understand the engine test."
He said he picked up a piece of information at random, turned a page casually, looked at the complicated diagrams and data, and pouted: "It’s not that I’m embarrassed for you, and tell me if I don’t understand. I will ask Director Chen again. , See if you can start simple."
"Finished." Li Zheng rubbed his hands and was ready to go.
"I... I can't do it." Lin Yue swallowed quietly and raised his hand. "I applied to do something simple..."
"Say early." He Zhongrui laughed, "Just, you sorted out the data we parsed out last night and integrated it into a document to send to the technical team. Come and come, I will teach you."
"Don't don't do it!" The watering brother watching the drama next to him rushed forward. "You are busy doing something else, I will teach this kind of work."
"Eh, you can't tell clearly."
"I've been doing this job all the time, I know better than you... Team leader, you see you are busy all night, hurry and rest."
"The newcomer has just arrived, is this my time to rest?"
When they engage in unnecessary competition.
Li Zheng had already drawn a chair and sat in front of the information desk, and stably set the draft paper, notebook and calculator.
I didn't have time to find something to learn, and this information hit myself.
This must not be learned!
...
This study of Li Zheng is forty minutes.
When he returned to school and found He Zhongrui, the latter had just told Lin Yujing about the document and was about to go to the lounge to squint.
When he saw Li Zheng coming, He Zhongrui smiled tiredly: "I'm talking about it, I don't understand it... In this way, I told Xiaolin about the document. You should sort it out with her and get familiar with the work."
"No, basically understand it." Li Zheng beckoned expectantly, "Come on, do some big work."
"?????" He Zhongrui stunned, and then glanced at the information table again. "You... just look at two pages and think you're fine?"
"I still read a lot." Li Zheng explained bitterly, "It's just that I have touched a lot of knowledge before, and I can jump over if I can jump."
"No..." He Zhongrui grabbed his scalp and said, "Space engine knowledge, where do you teach me to get in touch?"
Li Zheng is not easy to say anything, just raised his eyebrow and said: "Okay, Brother Rui, let's try some big work first."
He Zhongrui was anxious when he saw his hippie smiling face: "Li Zheng, how big can bear to do big things, as far as you are now, can I dare to give you a living?"
"Ah, this..." Li Zheng was embarrassed.
He doesn't blame He Zhongrui, as the common sense infers that he really has a problem.
But how can this be explained...
At this moment, a sneer came suddenly.
"Test him." Lin Yuejing sat in front of the computer and scanned the document. "Just test him anyway."
"Miao." Li Zheng's eyes glared and once again hooked at He Zhongrui, "Exam me."
"..." He Zhongrui was naturally too lazy to waste this time, not to mention being sleepy, but considering the complexity of these two personal identities, he finally nodded, "Li Zheng, the work is really tight now, if you answer If you don’t come up, you can either go back to study or do documentation work with Kobayashi, at least don’t increase our burden.

"Sure." Li Zheng's expression gradually became more severe. "Teacher He asked directly if it was difficult, saving time."
"It's difficult to ask." Lin Yuejing coaxed beside him.
"Haha..." He Zhongrui smiled bitterly, "I really want to give you a face...but since Kobayashi has said so...I'm welcome."
"please……"
He Zhongrui rubbed his forehead and thought.
Several people in the office also madly sneaked over.
However, it is only at the high school level, even in the field of masters and doctors.
It's time to show the dignity of Xueba, team leader.
Let Lin Yuejing take a good look at the level of the test group.
The word "aerospace engineer" is not called in vain.
As for He Zhongrui, although he was asked to face a difficult problem, he was a doctorate level after all. As soon as he came up, he would be able to answer the elaborate problems that the other party would not be able to answer.
On the other hand, he also wanted to take the opportunity to inspect Li Zheng's level.
Therefore, he raised a question of stability and stability.
"The main failure mode of a pumped engine."
Li Zheng answered immediately.
"A total of 12 data."
"1. The joint is leaking."
"2. The starter is abnormal."
"3. Hot gas leakage."
...
"12. The valve works abnormally."
He Zhongrui glanced at him, and immediately asked, "Where does each failure mode occur?"
"Leaks, corresponding to joints, welds, cracks, rotating seals..."
...
"Foreign matter, corresponding injector, turbo pump, air flow hole."
He Zhongrui stared at Li Zheng for a long time before asking: "Have you ever carried it before?"
Li Zheng had to laugh back.
Who's okay with this thing?
"This does not need to be memorized." Li Zheng explained, "After a comprehensive understanding of the engine structural components, if a fault is raised, it will naturally be possible to analyze the parts where it may occur, and the understanding is good."
Not only He Zhongrui, but also the others who were madly aiming at it were a bit ashamed.
Go to your mother, just to carry it, understand a hair.
They don't know yet, Li Zheng, who has passed the test of two competitions and a series of thinking temper...
The brain has already become strange.
"..." He Zhongrui asked after a moment of entanglement, "Please list a few main fault characteristic value parameters."
"Flow, pressure thrust, temperature, vibration, speed, stress, torque..."
"Enough." He Zhongrui raised his hand, "Simple talk about how to choose the feature value."
"Select n feature parameters xk from the existing N feature parameters xi to form an optimal feature subset under the meaning of a certain index function J, and among all possible candidate feature values..."
He Zhongrui interrupted Li Zheng again and asked again: "What is AWSSA?"
This time Li Zheng thought for a while and said: "Adaptive weighting and averaging algorithm is one of the algorithms for analyzing faults and predicting based on engine characteristic signals."
He Zhongrui suddenly turned around, picked up the pen and paper on the table, and wrote two or three calculations that were absolutely impossible for people with a volume of more than 60%.
"The above is the mean of the detection parameters, and the following is the variance. Can you calculate the Grubbs statistics?"
"Wait a moment..." Li Zheng took the pen and thought about it. He wrote a formula that is simple, but it is possible for people within 70% of the amount to be understood, and then took out the calculator and rubbed his hands. "Teacher You go to rest for a while, and I will start to count slowly."
"No need..." He Zhongrui held Li Zheng's arm, and his entire face showed an innocent suspicion of life. "Why do you even understand fuzzy math?"
"Just..." Li Zheng hesitated and said, "Slightly understand."
"..." He Zhongrui looked at Li Zheng, as if the words "why" were about to be shot in his eyes.
After a long time, he let go of his hand and said to someone in the back row.
"You teach him the process of analyzing engine test data."
"……it is good……"
He Zhongrui looked at Li Zheng, and then at the table, and finally asked: "Why..."
Suddenly another laugh came.
"Huh..." Lin Yujing covered his mouth and smiled. "Now I know how hard I am... who has learned this."