What is a Theoretical Model?

This is a big problem encountered by Xu Mang at present, he does not know what is called a theoretical model, he searched for related questions on the Internet, and did not give a clear answer, but many people said that this is a tool of the Department of Economics. 35xs

In order to solve this doubt, Xu Mang made a call to Xiaoman.

And then it's tragic,

was scolded directly, on the grounds that she couldn't be with her tomorrow, and she was very sad.

Of course

In order to make up for Xiao Man's loss, Xu Mang drove to her campus overnight, but unfortunately the trip was not all smooth sailing, and he encountered the first difficulty that stopped him, a powerful security uncle who had experienced vicissitudes of life.

"It's me!"

"The handsome guy you once took to the little black room. When Xu Mang saw the face of the security uncle full of stories, he remembered who he was, and said with a smile: "I'm here to find my girlfriend." ”

"Are you?" the security guard didn't think about the young man in front of him for a while.

And then

Xu Mang smiled shyly at the security guard.

"It's you!" shouted the security guard in horror.

afterwards

Xu Mang entered the school.

When he got downstairs to the dormitory, he encountered a second obstacle, the door of the dormitory was locked, and it was only half past nine!

"Alas"

"The greatest happiness that prevented humanity was the time when the doors of university dormitories were locked. Xu Mang was helpless about this, so he could only make a call to Xiaoman.

"Hello?"

"The gate was locked, and I couldn't get in. ”

"Climb up!" Yang Xiaoman said casually: "Old lady, I left you a window." ”

Xu Mang: ???

Falling in love these days requires not only money, but also some skills, such as climbing up and climbing through windows.

Xu Mang's ability to climb walls and windows is very high, which is a skill he learned in junior high school, although he has not climbed walls and windows for a long time, but this is like a talent for farming in his genes, which cannot be eliminated.

Through skillful skills, Xu Mang climbed to Xiaoman's dormitory on the second floor.

"Coming?"

Yang Xiaoman glanced at Xu Mang, who was panting, and said helplessly: "I think you should exercise hard, so I climbed to the second floor and gasped like this, what if I live on the fifth floor?"

"Fifth floor?"

"That can only stage a ghost love" Xu Mang flipped through the white cigarette, sat on the table next to him, and said helplessly: "I'm so tired, is there any cold Coke?"

"Forgot what I said?"

"Coke will cause the dilution of chromosomes, if there is any accident in the child, you will die!" Yang Xiaoman was making an excel sheet with a notebook, Xu Mang was a little curious, and leaned over, only to see a large group of names, as well as a bunch of numbers behind. 35xs

Alas?

Why am I still there?

"Xiao Man?"

"What are you doing here?" Xu Mang asked curiously, "Why is there still me in it?" and ranked first?"

"Here's my analysis of the strength of the players in a few days' time. Yang Xiaoman said expressionlessly: "You are my biggest opponent at present, of course I want to rank you first, see no, the value is one hundred, full score." ”

Xu Mang was stunned for a moment, originally his idea was to kill everyone, and then put himself second, so that the queen would be the first, but now it seems that this idea is unlikely, Xiao Man has a character of not admitting defeat.

"What kind of competition is it?" asked Xu Mang.

"It's an individual competition. Yang Xiaoman said: "Two and a half hours to complete a comprehensive paper, it seems that the score is 500 points"

"Oh" Xu Mang smiled: "Can you accept the fact that you are second? If not, I will give it to you." ”

"Get out!"

"If I know that you are negative in the game, come back and wait for the family law to serve!" Yang Xiaoman glared and said viciously: "There is an author named Taibai Cat, who was forced by readers to wear women's clothes because of his debts, I think you can too, I know that you have a problem with your attitude, wait to wear women's clothes and go to the playground for a run!"

it!

Too ruthless, right?

Xu Mang shrank his head and said cautiously: "Oh Xiaoman, I'll tease you!"

"If you love me, please do your best!" Yang Xiaoman said seriously.

Xu Mang: Σ(°△°|||) ︴

Is there a slippery slope in my thinking?

Can't you?

"Uh," Xu Mang asked cautiously, "Are you sure?, I have a nickname on the rivers and lakes - perpetual motion machine!"

“？？？”

Yang Xiaoman looked confused, looking at Xu Mang, who was smiling evilly, and instantly she understood the meaning of these words, and then opened her heart to speak. 35xs

"Huh?"

"Do you have a bold idea in your mind?" Xiao Man said shyly: "If you have an idea, act immediately, don't become a giant in thought, a dwarf in action, and in a week, my relatives will come, seize the opportunity!"

Xu Mang: Embarrassed

"I'm a stubborn person. Xu Mang said seriously: "Next year is next year, not a day earlier." ”

Hearing the sonorous words, Yang Xiaoman couldn't wait to beat Xu Mang to death, and obviously had the opportunity to smash him like raindrops, this guy relied on his obscene position and flashed it to you one by one.

My heart is so tired, I don't feel like I can love anymore.

afterwards

Briefly warm up, sprinkle dog food, and start the purpose of this visit.

"Xiao Man?"

"Do you know about high-temperature superconductivity?" Xu asked, "And what is this theoretical model?"

"It's okay. ”

"I didn't say it on the phone. Yang Xiaoman said listlessly: "High-temperature superconductivity is a physical phenomenon, which is higher than the zero resistance and complete diamagnetism produced in a liquid nitrogen environment at a critical temperature of 77 Kelvin. ”

And this so-called theoretical model. Yang Xiaoman pondered for a moment and said silently: "Uh, it is a scientific abstract concept of physical phenomena, a description of the essence of reactive substances in nature. ”

"I don't understand" Xu Mang shook his head in confusion: "Can you be popular?"

"In the case of high-temperature superconductivity, for example, you need to establish a physical-mathematical relationship to derive the variables between each one. Yang Xiaoman said: "Do you know why I am looking for you?"

"Good at math?" Xu Mang was stunned for a moment, and hurriedly replied: "And physics is good!"

"No!"

"It's because you shine in materials science that others are eyeing you. Yang Xiaoman said indifferently: "The most embarrassing situation in condensed matter physics now is the lack of theoretical models of high-temperature superconductors, and I still don't know what the generation mechanism of high-temperature superconductors is. ”

"This leads to the exploration of superconducting materials, which is a game of chance. Yang Xiaoman glanced at him: "Let you pretend to be forced, now pretend to be in trouble, right?"

No way!

Sounds like a troublesome feeling.

At this time, Xu Mang's face was like ashes.

"Huh. ”

"Don't think that's the end of it. Yang Xiaoman sneered: "At present, even the darling of high-temperature superconductivity, the consistency theory of copper oxide superconductors, is it even more desperate now?"

it!

Xu Mang was completely autistic.

Let's make soy sauce!

Following

Saturday morning,

With a relaxed mind, Xu Mang came to the condensed matter physics laboratory not far from the physics department building, which is a laboratory located underground.

Putting on the white coat work clothes that are standard in the laboratory, Xu Mang slowly pushed open the door, and when he saw Professor Fan and three students from yesterday, two men and one woman, he couldn't help but smile and said, "I'm here!"

“？？？”

“？？？”

“？？？”

Why is he here?!

Did the professor say that the mysterious team member was Xu Mang?

The three members were told that today there is a very large member who has joined the group, and this person has the absolute right to speak in the fields of mathematics, physics, and materials, and is an out-and-out all-round genius.

however

The three members were skeptical of Professor Fan's words, how could such a talent appear in this world, and it was not the Internet.

Now it seems that

The professor is right.

Xu Mang's mathematics does not need to be explained too much, he is already teaching physics students advanced mathematics class, and the academic paper on the self-torque of light in physics is enough to slap his face, and materials science now uses the database he developed.

"Xu Mang. ”

"Quite spiritual?" Professor Fan said with a smile, "I hope you can maintain this mentality in the future, because in the field of high-temperature superconductivity, you need to endure loneliness." ”

"Hey, hey. ”

"Professor, what are you doing?" Xu Mang glanced at the many large equipment in the laboratory and asked curiously: "Why is the equipment of the condensed matter physics major so high-end, and our theoretical physics major is only a pen and a piece of paper." ”

"Can't say that. ”

"There is no distinction between high and low in scientific exploration. Professor Fan said.

Xu Mang was helpless,

There's nothing wrong with saying that, but my heart is very twisted.

afterwards

Professor Fan took Xu Mang to visit the laboratory and explained to him the equipment in the laboratory.

"This is a dynamic signal analyzer that is used to test and analyze dynamic transmission characteristics. ”

"This is a thermogravimetric analyzer that measures the weight of a sample as a function of temperature or time. ”

"This is a precision ion thinner for studying the cross-sectional structure of superconductors, devices, and thin films. ”

Professor Fan explained quite carefully, but Xu Mang could only understand a third of the content.

"Professor?"

"Did we make all these instruments ourselves?" asked Xu Mang curiously.

Professor Fan shook his head and said with a wry smile on his face: "It's all imported." ”

"Oh" Xu Mang nodded, and did not feel surprised, precision instrument manufacturing is indeed our shortcoming, there is nothing to be inferior to, what I do is not to shorten the gap for this.

Soon after visiting the laboratory, Professor Fan led Xu Mang to the lounge, which was simply arranged with a table, a few chairs, a water dispenser, and a few computers, and nothing else.

"Xu Mang. ”

"We are currently looking for a new copper oxide superconductor, but we don't have a clue. Professor Fan said, "There is really no way, so I found you." ”

Speaking of which,

Xu Mang hurriedly spoke: "Professor Fan, I asked my girlfriend yesterday to find out about the situation, and she said that it is impossible to establish a theoretical model of high-temperature superconductivity, and I think that with my ability, I can't subvert the world for the time being." ”

"It's my fault. ”

"Maybe I wasn't precise enough at the time. Professor Fan said: "I am not asking you to break through the limits of nature, I hope that you can find the potential element combinations of copper-oxygenated high-temperature superconductors among many materials, and help us detect mines first." ”

"Huh?" Xu Mang looked confused.

"It's about building a model. ”

"What elements can bind to copper oxide superconductors and have the potential for a higher temperature superconducting phase transition, and what is the probability of this? Professor Fan said: "We can't do this work, only people like you who are outstanding in the fields of mathematics, physics, and materials can do it!"