Chapter 185 The Young Lecturer of Qu Gao and the Widow
Xia Yangjie didn't know what was wrong with him. He had been sitting on the bench for four years, and yet he was still so impulsive. He just heard some comments from some teachers in the teaching and research office who had just returned from a meeting, and Xia Yangjie hugged his
The notebook chased him out.
Xia Yangjie graduated from a prestigious domestic university four years ago and was assigned to teach in the Department of Chemical Engineering of Pujiao University. He originally did not study polymer chemical engineering, but studied mathematics. The reason why he came to the Department of Chemical Engineering is ridiculous.
, that was because the female teacher who originally taught mathematics in the Department of Chemical Engineering had a baby and could not attend class for two months. The leader of the Department of Chemical Engineering asked for a new mathematics teacher to fill her vacancy, so Xia Yangjie, who had just graduated, was
It's been assigned.
Xia Yangjie is not a nerd, but he really lacks talent in lecturing. In his opinion, jumping from one formula to another is a simple matter, and there is no need to list the detailed derivation process. But when he uses this
When he gave lectures using his way of thinking, a large number of his students failed the class.
The department leader talked to him several times and went to the classroom to listen to his lectures. Finally, he concluded that this person was not a material for teaching mathematics at all. Fortunately, the female teacher who had given birth at this time had returned from maternity leave, and Xia Yangjie
With deep regret and confusion, I was laid off.
Of course, the Department of Chemical Engineering cannot keep an idle person in vain. After some research, Xia Yangjie was transferred from the Public Course Teaching and Research Section to the Polymer Teaching and Research Section, where he took on the task of researching filament winding models.
Fiber winding is a composite material production technology that emerged in the 1940s. To put it simply, fibers soaked in resin are wound around a mandrel according to a certain pattern. After the resin dries, the mandrel is removed.
A fiber resin product can be obtained.
The principle of fiber resin is a bit like the reinforced concrete we usually see. The resin is equivalent to cement, and the fibers are equivalent to steel bars, which can improve the strength of the material. The most common fiber resin is fiberglass. This is a kind of fiberglass reinforced concrete.
Fiber reinforced plastic products.
In addition to glass fiber, the fibers used in fiber-wound products also include aramid fiber, carbon fiber, etc. Fiber-wound technology can be used to manufacture pipes, pressure vessels, solid rocket motor casings, etc., and is an emerging new material technology.
Our country has begun research on fiber winding technology as early as the late 1950s. At that time, it was mainly to serve the needs of cutting-edge national defense science and technology for two bombs and one satellite. In the 1970s and 1980s, my country introduced it from West Germany, Italy, Japan, the United States and other countries. Several pieces of filament winding equipment have been installed, and related work on localization has been carried out.
The method of fiber winding is a bit like the process of winding cotton yarn into spindles in a cotton spinning mill. The wound mandrel rotates at a certain speed, and the fibers move back and forth along the axis, forming a circle of winding lines. Xia Yangjie in
The task of the Polymer Teaching and Research Section is to help teachers doing research in this area calculate the operating speed of the mandrel and the speed of the fiber spinning nozzle to ensure that the wound structure meets the design requirements.
The teachers in the Polymer Teaching and Research Section all studied chemistry and did not have a good foundation in mathematics. Therefore, there are some obstacles in calculating such a model. But for Xia Yangjie, who is quite talented in mathematics, this model is simply like a few differential geometry.
As simple as the exercises, he solved these problems that had troubled everyone for a long time in three strokes, five and two. No one expected that it was these exercises that made Xia Yangjie obsessed with this field and out of control.
The fiber winding density, angle, fiber overlapping method, etc., all have a significant impact on the performance of fiber wound products. The influencing mechanism is not so much a chemical problem as it is a very fascinating mathematical problem. In addition, traditional fiber-wound products are mainly convex symmetrical rotors. For asymmetric products, or so-called double-concave rotors, how to realize the winding process is also a topic that requires a lot of space calculations. All these topics make Xia Yangjie feel Endless fun.
After completing the tasks assigned by the teaching and research office, Xia Yangjie began to conduct his own research. He introduced a large number of mathematical concepts into polymer research, and proposed a multi-degree-of-freedom fiber winding and laying model, as well as other models based on Ya The gradient projection method of comparable matrices, the weighted least squares method based on SVD decomposition, the inverse kinematics closed-loop solution method, etc., I had a lot of fun.
In any field, the person who is one step ahead is a genius, and the person who is more than ten steps ahead is a madman. Xia Yangjie's research on fiber winding theory is not only more than ten steps ahead of his peers, but the result is that no one cares about it.
In the entire Polymer Teaching and Research Department, no one knew what Xia Yangjie was doing, the differential geometry equations he wrote. No one except himself could understand it, nor did they know what it did. Xia Yangjie could not find anyone in the teaching and research department. A colleague who could discuss issues with him wrote an article for submission, but the editors in the editorial department didn't know whether what he wrote was correct. In four years, he didn't even publish a paper. So the department leaders and colleagues In their eyes, he became a useless person who was ignorant and could only show off some mathematical formulas.
This time Qin Hai and Lu Xiaolin came to the Department of Chemical Engineering to hold a seminar. The academic secretary also notified Xia Yangjie to attend the meeting, but Xia Yangjie had long been disheartened by such meetings. He did not think that bureaucrats from government departments could I can understand his theory. Besides, he himself is not very popular, so why should he join in the fun? So, during the meeting, he stayed in the teaching and research room by himself, deducing the formulas that only he understood. .
The teachers in the teaching and research section were ridiculed by Qin Hai at the meeting, and all of them were ashamed and speechless. After returning to the teaching and research section, everyone talked about the setbacks they had suffered today. In addition to being indignant, some people also complained about Qin's conscience. Hai's knowledge is indeed extraordinary, and some of the research directions he proposed have really inspired me.
During this period, a teacher who usually had a decent relationship with Xia Yangjie knocked on Xia Yangjie's desk and said to him casually: "Xiao Xia, it's a pity that you didn't go today. If you went, maybe the localization process would be done That young man was defeated."
"What do you mean?" Xia Yangjie pushed up his myopia glasses on his nose and raised his head in confusion and asked.
"Today, a very cool young man came to the Office of Localization and demoted all of us. I thought, we can't understand the things you usually do. If you tell that young man, maybe you can If you keep him confused, at least we won't be wiped out." The teacher said half-jokingly.
In fact, what he was thinking about was another matter. He hoped that Xia Yangjie could also attend this meeting and be demoted by Qin Hai, so that his psychology would be balanced. As the ancients said, good things should be kept to yourself, and bad luck You should hold others together when you are doing something. This teacher has always respected this ancient adage.
Xia Yangjie didn't think too much. He just asked strangely: "What kind of young man can demote our entire teaching and research department? What did he say?"
The teacher selected the important content and introduced it to Xia Yangjie, and then said: "By the way, Xiaoxia, aren't you doing some fiber winding? I see that among the topics they listed, there is also a question about free-form fiber winding technology.
, don’t you want to try?”
"Free-form fiber winding process?" Xia Yangjie's eyes lit up, "Did they really say that?"
The teacher threw the materials handed out at the meeting in front of Xia Yangjie and said, "See for yourself. I don't understand this field, so I don't know if what they said is right."
Xia Yangjie opened the information and saw the question mentioned by the teacher at a glance. He read the explanation and requirements of the question twice at a glance. He felt his heart heat up and stood up immediately.
"Teacher Hu, where are they?" Xia Yangjie asked.
The teacher surnamed Hu pointed with his hand and said: "Teacher Qian sent them out. They should not have gone far by now. What, Xiaoxia, do you really want to find them?"
"I...I..." Xia Yangjie faltered twice, not knowing what to say. He smiled apologetically at the teacher surnamed Hu, then pulled out a notebook from the drawer, held it in his arms, and rushed out
to the teaching and research section.
"Lao Hu, what's wrong with Xiao Xia?" Someone noticed Xia Yangjie's strange behavior and turned around to ask the teacher surnamed Hu.
The teacher surnamed Hu smiled and said: "I just told Xiao Xia a few words about the meeting. Xiao Xia probably went after the two young people from the localization office."
"Haha, I think Xiao Xia and them are quite compatible. They both seem a bit unattainable." A teacher commented sourly.
"You can't say it like that. It's called being arrogant and reticent. It's because you don't have the level of appreciation and can't hear the elegance of it." Another teacher said in the same weird tone.
"Haha, it's true that you are high-minded and reticent. However, I'd better treat you as a humble person. We can't get the things that are in the sun." The teacher in front said leisurely. These older generation intellectuals all have very good classical writing skills.
, although they are a group of people engaged in chemistry, they are no strangers to talking about allusions.
Xia Yangjie didn't know what others were talking about him. Even if he knew, he wouldn't care, because he had heard a lot of such comments overtly and covertly in the past few years. He ran out of the office building, went outdoors, and raised his eyes to
Looking in the direction of the school gate, I saw two people obviously related to the school.
Young teachers and students in different costumes were walking out side by side and quickly chased after them. At this time, Qin Hai and Lu Xiaolin heard the footsteps behind them and both stopped and looked back. Xia Yangjie asked aloud: "
Excuse me, are you two from the Pusang Localization Office?"
"Yes, we are a localization agency. Excuse me..." Qin Hai asked calmly.
"My name is Xia Yangjie. I am from the Polymer Teaching and Research Section of the Department of Chemical Engineering. I study fiber winding theory, but I am ashamed that I have not made any achievements. I would like to ask, do you really want to do research on free-form fiber winding technology?" Xia Yangjie
He answered confusedly.
PS: This chapter is the one at eight o'clock in the morning. I didn't expect it to be so difficult to write...Filamentation is a very complicated and complex problem. I almost feel stupid when I read the paper. I hope the concepts in the article are not
Wrong writing. As for the accuracy, let’s skip it. Finally...please vote for me.