wavenovel You'll be in charge of her from Chapter 34 onwards.
You'll be in charge of her from Chapter 34 onwards.
When the topic of thermal deformation compensation came up, Zhao Jishi suddenly raised his hand to interrupt him.
"Comrade Xiao Chen, I have a question."
Chen Weiguo put down the chalk. "Chief Engineer Zhao, may I ask you something?"
"When you derived the thermal network model, you simplified the spindle box into a six-node model. How was this number of nodes determined? Why not eight or four nodes? Did you consider the influence of axial heat flow during the simplification?"
He hit the nail on the head right from the start.
As expected of the deputy chief engineer of the ministry, he saw the core problem at a glance.
Chen Weiguo remained completely calm.
He had already thought of this problem.
"Chief Engineer Zhao asked a good question. The determination of six nodes is based on the structural characteristics of the spindle box and the distribution of heat sources. I have done node sensitivity analysis. When the number of nodes increases from four to six, the prediction accuracy of thermal displacement improves by 17%, but when it increases from six to eight, the accuracy improvement is less than 3%, while the calculation workload doubles. Considering both accuracy and engineering practicality, six nodes are the optimal choice. As for axial heat flow, I have specifically listed a correction item in Section 3, Item 5, you can see it."
He turned around and quickly wrote a few lines of formulas on the blackboard, deriving the correction term for axial heat flow separately.
After reading it, Zhao Jishi nodded, made a few notes in his notebook, and didn't ask any more questions.
The students below the stage stirred up another commotion.
This time, the boy with glasses didn't hesitate; he simply wrote a line in his notebook: "This guy's got talent."
Next, it was Meng Zhaofang's turn to ask a question.
Mr. Meng is the chief engineer of Yanjing Heavy Machinery Plant. He has spent his whole life working with heavy equipment, and the questions he asked were more focused on practical engineering.
"Your solution is good, but I've worked in the factory for decades, and I have a question for you. The real-time thermal deformation compensation you're using requires high-precision temperature sensors and servo drives. Can you be honest about the accuracy of domestic sensors? If the sensors themselves aren't accurate enough, your algorithm, no matter how good, will be useless."
That's a tricky question.
No matter how good the theory is, it's worthless if it can't be implemented.
Chen Weiguo answered readily: "Mr. Meng is right, sensor accuracy is indeed a bottleneck. In my solution, I proposed an alternative approach, which is to use thermal equilibrium time estimation for semi-closed-loop compensation when the sensor accuracy is temporarily insufficient. The accuracy is not as good as full closed-loop, but it can improve the processing accuracy by more than 40% compared to no compensation. I wrote the specific algorithm in Section 4, please turn to the third paragraph of Section 4."
Meng Zhaofang looked down and flipped through a few pages of materials, frowned slightly, and then unfolded the document.
"Semi-closed-loop compensation... Okay, this kid really wants to implement the project, he's not just good at theoretical talk."
The five experts took turns asking questions.
Professor Qian asked about the boundary condition assumptions in vibration modal measurement, Professor Lin asked whether he had thoroughly understood the design logic of the Swiss original data, and Professor Zheng deliberately asked about an obscure knowledge point to see how broad his knowledge was.
Chen Weiguo caught them one by one and answered them one by one.
He can answer some questions on the spot.
He wasn't prepared for some of the questions, but he had a system that he could secretly access, glance at the answers, and then reorganize them in his own words.
Three and a half hours.
There was no break in between.
Xu Zhenbang was in charge of taking notes from the audience, and by the end, his hands were shaking with excitement.
He had worked at the institute for almost ten years and had heard countless technical defenses. He had rarely seen anyone who could stand up for three and a half hours in front of experts of this level without showing any fear.
Not to mention that Chen Weiguo was only twenty-three years old and a student in a vocational high school continuing education program.
By the time the defense ended, the piece of chalk in Chen Weiguo's hand had been worn down to just a small tip.
The formulas on the blackboard were erased and rewritten, then erased again, over and over again, until a thick layer of chalk dust accumulated on the eraser.
He turned around and bowed to the five experts.
"That concludes my report. I welcome any criticism and suggestions from the experts."
Zhao Jishi was the first to put down his pen and exclaimed, "This kid is a talent."
Meng Zhaofang slammed the notebook shut: "Comrade Chen, after you graduate from your training course, would you be interested in coming to our heavy machinery plant? I'll give you the salary of a deputy section chief."
Zhao Jishi immediately chimed in, "Old Meng, don't try to steal him. This person is already on our Ministry of Machine Building's talent pool."
Professor Qian was usually a man of few words, but he made a rare remark at this moment: "This level of skill is among the best in the country."
There was a moment of silence in the audience, and then, someone started clapping.
The boy with glasses clapped so hard his hands turned red.
Professor Lin patted Professor Zheng on the shoulder: "Old Zheng, you've really struck gold by taking on this student."
Professor Zheng smiled, a rare occurrence: "I didn't pick it up; it just popped up on its own."
After the defense ended, people gradually dispersed.
Chen Weiguo sat by the podium and drank an entire enamel mug of water.
I talked non-stop for three and a half hours, and my throat was practically burning.
Professor Zheng walked over and sat down next to him.
"Good performance."
"Thank you, Professor."
"Don't thank me yet. There's something I need to tell you."
Professor Zheng took a document out of his briefcase and handed it to him.
Chen Weiguo took it and saw that it was an internal notice from the research institute, stamped with a red seal.
The document reads: "After deliberation by the institute's administrative committee, it has been decided to accept Zhou Mengxue, a student from the Department of Mechanical Engineering at Tsinghua University, as an intern researcher in the Second Research Laboratory's research group, with a three-month probationary period. Guarantor: Zheng Shuming."
Chen Weiguo stood up abruptly.
"Professor, did it work out?"
"It's done."
Professor Zheng took off his glasses and wiped them. "I've seen her transcript. She's in the top three in the entire department, no exaggeration. I also had the data retrieved for those small inventions she did before. There was a design for a precision transmission mechanism, which was a bit rough, but the idea was right. When I talked to the director, I said one thing: if this student is buried because of her background, it's a loss for our institute and a loss for the country. The director made the decision and gave her special approval."
A surge of warmth welled up in Chen Weiguo's heart.
Professor Zheng is a man of few words, but he gets things done.
I didn't follow the wrong person back then.
"However, there is one thing."
Professor Zheng looked at him. "You recommended her, and I signed the guarantee, but once she joins, she'll be directly under your supervision. You're a key technical member of the research group, and mentoring newcomers is your responsibility. Don't let me misjudge her."
Chen Weiguo stood at attention: "Don't worry, Professor."
That evening, Chen Weiguo did not go directly to Zhou Mengxue, but instead went back to the research institute to complete all the formalities.
I spoke with the personnel department, got my intern researcher work permit, and received a set of office supplies.
Only after everything was settled did I inform Zhou Mengxue.
He went the next afternoon.
He found the small courtyard by following the address Zhou Mengxue had given him.
The courtyard is located on the edge of the Tsinghua University residential area.
Zhou Mengxue opened the door and stood there stunned.
"Brother Chen..."
Chen Weiguo smiled and handed over the file bag in his hand.
"have a look."