Just turned over a new leaf and became a wise and intelligent student

Chapter 304 Teacher Qiu, please close the door
After Xu Qingshan finished speaking, he ignored Qiu Yong and sat on the sofa by himself, with his legs half draped over the blanket. He wrote and drew on paper with a pen, and occasionally picked up the computer on the table to check information.

Qiu Yong sat for a while.

Jiang Huanxi was busy with his number theory work nearby, and Tong Tong was also looking at questions in the room, and he was still sitting there.

After sitting there for a long time with no one paying attention to him, Qiu Yong felt that he was being bored, so he asked Xu Qingshan symbolically.

"Then if there's nothing to do with me, why don't I go back first?"

Xu Qingshan stopped what he was doing, moved his gaze from the computer to Qiu Yong's face, pondered for a moment, and nodded.

Qiu Yong sighed and stood up to leave, but he moved slowly, as if he was waiting for Xu Qingshan to keep him to do something together. After all, he still had a lot of knowledge that he wanted to teach Xu Qingshan about what literature he could read.

"Hey, Old Qiu."

Just as Qiu Yong walked to the entrance of the suite, Xu Qingshan's voice came from behind him.

"Hey! What? What do you need me to explain to you?"

Qiu Yong's face lit up and he asked.

He felt that at this moment, the gears of fate began to turn, and he and Xu Qingshan were about to have a master-disciple relationship. In the end, he was moved by his own emotion and reason, and was grateful for his profound knowledge, kind character, and calm way of doing things. Finally, he turned to the light and turned from Peking University to Huaqing.

Ah!
What a wonderful academic legend!

Qiu Yong's face was filled with emotion when he saw Xu Qingshan's puzzled look.

Xu Qingshan pointed at the door and said.

"Nothing else, just remember to close the door when you go out."

"what?"

"It's okay if you don't turn it off. I'll turn it off later."

Xu Qingshan thought Qiu Yong was reluctant, and was stunned for a moment, feeling a little annoyed. When he was concentrating, he forgot to respect his teacher. How could he order Teacher Qiu around?
"It's okay, it's okay. I'll turn it off."

Qiu's eyes were filled with tears. He closed the door with hatred and walked away faster than a rabbit.

In fact, if Xu Qingshan really wanted to develop scientific computing software for organic polymer materials, he must first have sufficient understanding of organic polymer materials.

Fortunately, he had already laid some foundation in Peking University, and Xu Qingshan always felt that his brain was getting better and better as he used it, so it didn't take too much time for him to organize his learning ideas.

However, there are a few important issues that need to be mastered in depth so that he can have a clearer understanding of the entire computing system and simulation process when designing original algorithms.

"Quantum nuclear tunneling model for charge transport in organic and carbon materials, conductivity mechanism; multimode coupling rate problem of organic molecular aggregates and polymer electronic excited states"

Xu Qingshan was muttering something that Jiang Huanxi and Tong Tong couldn't hear clearly.

But they both have their own things to do.

The room was very quiet.

There was only the sound of slight breathing, fingertips sliding across paper, and intermittent keyboard sounds.

Normally, if a newcomer comes into contact with materials computing, the most suitable learning plan should be to first familiarize himself with the Linux operating system and MATLAB programming. Once he is familiar enough to write some fairly mature small programs, he can be considered to have some programming basics.

Then, you should find some relevant doctoral or master's theses to study and understand various aspects of materials computing.

Only after you have a general understanding of the various sub-categories of materials computing can you begin to learn the relevant theories of molecular dynamics, which can be regarded as an extension of computational physics. Many people should have been exposed to it during their professional courses.

After that, I learned to compile LAMMPS software, which is a molecular dynamics simulation software developed in 2003. It mainly relies on its built-in rich potential energy model to simulate different material states and interaction forces.

Using LAMMPS, learning how to write in files, and understanding how to analyze results are the most classic and popular ways to help newcomers build up an understanding of computational materials science and a complete system.

At this point, you can imitate other people's papers and reproduce other people's work.

As long as the reproduction is successful, it means that you have successfully mastered the basic operations and ideas of materials computing.

Xu Qingshan understands Linux and is also good at using Matlab. He also has a certain knowledge reserve of molecular dynamics and related knowledge.

But he repeated the normal process again.

He even took out all his Matlab beginner's books and read them again.

Because he not only needs to do these things himself, he also wants to put together a more complete and suitable study plan with fewer detours for his graduate students to learn and master.

Whether it is materials computing or work related to mathematical physics.

When Xu Qingshan left the field of pure mathematics and began to move towards the field of applied practice, he would no longer have only Xiao Xue and Xiao Wang as his assistants.

Just like Qiu Yong said, we need a sufficient team.

“Enough” is hard to define.

But whether in terms of scale, resources, or other aspects, Xu Qingshan needs to use his influence to make up for it.

Maybe someone will ask.

What Xu Qingshan wants to do doesn’t have much to do with molecular dynamics, right?
Especially since he now wants to develop scientific computing software himself, is it appropriate for him to get involved in something that is not so relevant?

quite appropriate.

Because judging from the current level of computing power of personal PCs, being able to play around with LAMMPS is already the limit. As for the software that Xu Qingshan wants to make and the prerequisite data and preparations he wants to obtain, judging from the current computing power of personal PCs, let alone the laptop in Xu Qingshan's hand, even if he has a desktop, it would not be enough.

Many calculations involving first principles and finite element analysis require the use of supercomputers.

Or at the very least, he needs to add a workstation to his laboratory.

But now he only has his own office, not his own laboratory.

He would have to wait until after the Chinese New Year to return to Beijing and then go to the Information Technology Center to ask Lao Mei and others to help arrange supercomputing qualifications, then apply for laboratory qualifications, and then purchase a workstation, so that he could be suitable for carrying out related work.

Supercomputers are still relatively rare in China nowadays.

Xu Qingshan has paid attention to the fact that my country's "Tianhe-1" exascale supercomputer was successfully developed last year, making my country the second country in the world to successfully develop an exascale supercomputer.

In the future, and by 2011, China's supercomputers will have even greater breakthroughs, aiming to become the world's number one.

This simply provides an excellent breeding ground for the development of computer science.

of course.

The biggest reason why Xu Qingshan now chooses LAMMPS software to use on his laptop is
He is free.

After Sandia National Laboratories in the United States developed LAMMPS, it opened the source code and made it available for free use. This allowed Xu Qingshan to more quickly understand the development key of this type of scientific computing software by analyzing the source code of LAMMPS.

First, I modified the source code and studied its parallel expansion function, while thinking about how to design the algorithm for my own software.

Xu Qingshan was looking at the software on the computer while thinking. His pen, which had been writing very fluently, suddenly stopped moving, but his brain was moving very fast.

He seemed to have entered a state of almost meditation again.

Although Jiang Huanxi and Tong Tong were also studying hard, it was obvious that they had not reached the same level of immersive learning as Xu Qingshan.

After they finished their study and research tasks for the day, they wanted to come to find Xu Qingshan, but saw him in this mysterious state.

Tong Tong was still watching, but Jiang Huanxi had already gotten used to it.

"Let's go, let's go eat first, and then bring him food after we finish eating."

Jiang Huanxi patted the arm of Tong Tong, who was standing next to Xu Qingshan and observing him carefully but did not dare to disturb him.

"Why don't we wait until brother gets better before we go eat together?"

Tong Tong looked at Xu Qingshan worriedly, then looked at Jiang Huanxi, and asked with some dissatisfaction.

"If Qingshan enters this state normally, he won't be able to come back to his senses until night. If it's too late and it's hard to find food nearby, it will be troublesome if he comes back to his senses and gets hungry."

Jiang Huanxi was not dissatisfied with Tong Tong's attitude, but patiently explained, "Let's go eat something simple first to fill our stomachs, so that we can help him deal with all these problems. This hotel is quite interesting. There is a microwave in the executive suite. We can just buy some food that tastes good after reheating."

Tong Tong pouted, looked at Xu Qingshan reluctantly, then nodded and agreed.

Although I don't want to admit it.

But Jiang Huanxi did look more mature than himself. Even though he had been taking care of his grandmother and younger brother since he was a child and often worked part-time, he didn't seem to match Jiang Huanxi's gentle and steady temperament.

Is this the style my brother likes?
Tong Tong was puzzled.

Jiang Huanxi breathed a sigh of relief.

She was worried that Tong Tong would not understand and would insist on waiting here, and then accidentally disturb Xu Qingshan and affect his work.

At the same time, Jiang Huanxi's face showed no emotion, but she was still a little proud in her heart.

The days I live with Qingshan are my greatest advantage.

No matter what Tong Tong is thinking.

Judging from the current situation, I can control Qingshan, and Qingshan still favors me. My work and life in Qingshan are more important than Tong Tong.

This is enough.

The two girls went out together with ulterior motives.

Xu Qingshan stayed in the room like a silent tree root. If it weren't for his hands moving from time to time and his eyes wandering between the manuscripts and notebooks, it would be hard to believe that he was still a living person.

After a long time.

"It seems that the seventeenth idea is feasible."

Xu Qingshan flipped back a few pages and muttered.

As his soliloquy broke the silence, he slowly came out of that state of immersion.

"Gulu."

At the same time, Xu Qingshan's stomach also made a rumbling sound.

He glanced down and confirmed that he was hungry.

"Xiaoxi, Xiaotong, do you want to go eat?"

Xu Qingshan glanced at the living room. No one was there. He looked at the time. It was past eight o'clock in the evening. Maybe he was tired from studying and went back to the bedroom to rest? Or did he go to take a shower?

He didn't know and hadn't been paying attention to the situation outside, so he shouted loudly towards the bedroom.

But there was a long silence.

No one responded to him.

The entire executive suite was not small, and his voice echoed for a short time.

"Huh? What about people?"

Xu Qingshan put the manuscript aside and stood up. For a moment, his legs felt stiff and sore. If a person maintains the same posture for a long time, he will feel uncomfortable to some extent.

Of course, except when lying down to sleep.

After walking around the room twice, Xu Qingshan was sure that Jiang Huanxi and Tong Tong had gone out on their own.

"I think he went to eat?"

Xu Qingshan thought about it, then sat back on the sofa, made himself a cup of tea, and drank it to relax.

He knew very well that if Jiang Huanxi went out to eat, she would definitely not forget to bring him something, so he wouldn't have to worry about too many other things.

Xu Qingshan crossed his legs, picked up his phone and read a very interesting novel he had been following recently, while wrapping the handle of the teacup with tissue paper and bringing the scalding hot tea to his mouth.

The Min Yue people are like this.

The reason why we drink tea is that we are afraid of scalding our hands, but if the tea is not hot when we drink it, we have to pour it out and brew it again.

When drinking tea, you have to drink it hot!

"But"

Xu Qingshan sipped his tea while reading a novel.

But he forgot.

Drinking tea on an empty stomach will make you more hungry and hurt your stomach.

This is not.

He hadn't had a few drinks when his stomach started rumbling even louder and it didn't stop at all.

The hot tea he drank not only failed to warm his stomach, but also caused some signs of stomach cramps.

Just when Xu Qingshan was wondering if there was anything in the room that could fill his stomach, the door of the executive suite was opened. At that moment, when Xu Qingshan saw Jiang Huanxi and Tong Tong holding bags in their hands, it was like he saw his savior.

"What did you buy? I'm so hungry that my stomach hurts."

Xu Qingshan quickly stood up and took the bag.

Tong Tong approached Xu Qingshan with a concerned look on her face, reached out to touch his belly, and asked with tears almost coming out.

"Brother, your stomach hurts. What's wrong? Should we go to the hospital first?"

"It's okay. He must have drunk some tea. He was already hungry, so he became even hungrier after drinking it."

Jiang Huanxi changed her shoes, calmly handed the bag to Xu Qingshan, and then began to take off her heavy coat.

"I bought the wontons you like. I've tried them. The wontons here taste similar to the flatbreads we have in our hometown. I also bought the white duck, which is said to be a specialty of Jinling. It's eaten cold. You can try it."

As Jiang Huanxi was speaking, Tong Tong had already helped Xu Qingshan open the things in the bag.

"Yeah, it's really good."

Xu Qingshan stuffed the food into his mouth and ate it a little quickly, so he had to open his mouth and breathe out from time to time.

"Brother, eat slowly, be careful not to choke."

Jiang Huanxi had already changed her shoes and sat next to Xu Qingshan. She pinched a piece of white water duck meat with her hand and put it into her mouth. After eating one piece, she picked up the duck leg and took a small bite.

Tong Tong was stunned watching from the side. Didn’t they just eat enough?
"How is it, the wontons are delicious, right?"

"Ok!"

"Then try my duck meat. I've tested the saltiness."

Tong Tong just watched Jiang Huanxi take a bite of her and stuff it into Xu Qingshan's mouth.

you!

It was a very cold day, and the wind outside did not warm Tong Tong up. Instead, the wind that blew into the house directly warmed Tong Tong up.

Jiang Huanxi is worthy of being Jiang Huanxi, the biggest opponent on the road to his dream.

Look at her relaxed and natural feeling, without any awkwardness at all.

Tong Tong hesitated for only a moment and then sat down on the other side of Xu Qingshan.

(End of this chapter)