Chapter 348 Guo Ziyang: Don't panic, I still have a trump card
School of Physics, Condensed Matter Physics Laboratory.
I pressed the start button and the device emitted a low humming sound.
Xu Qingzhou first looked at the test data on the screen and found nothing abnormal.
"Then there will be a boring wait."
Xu Qingzhou asked the equipment to continue collecting data and took out the information given by Professor Zhao Shengwen and others from the table next door.
[After 5000 cycles at a high current density of 1 mA·g^–5000, the discharge capacity remained at mA·h·g^–1, which is still higher than the theoretical capacity of commercial graphite negative electrode materials (372 mA·h·g^–1). 】
The final result was pretty good, with the power storage capacity increased by about 10%.
After getting busy, time seemed to be accelerated, and it was May in a blink of an eye. The two went shopping on the 5st, and then stayed at home for a day. On the morning of the second day of the Labor Day holiday, Xu Qingzhou sent Song Yao to meet Professor Li Daiyue and others.
He went directly to the laboratory, checked the operation of the equipment, and began to look at the data.
In the villa area of the Peking University professors, Chu Jiangfeng and Gu Zhizhong were drinking tea. In addition to chatting about math problems as before, they also talked about topics related to Xu Qingzhou.
After Gu Zhizhong finished refilling his old friend's tea, he asked, "How is Xu Qingzhou doing recently?"
Chu Jiangfeng sighed and said helplessly: "He went to study physics."
"Physics?" Gu Zhizhong's hand froze while he was drinking tea, and he looked stunned. "Why did this kid go to the Physics Department again?"
Chu Jiangfeng recounted Xu Qingzhou's situation.
“The reconciliation analysis is no longer possible”
Gu Zhizhong didn't know what to say for a moment. No matter how you looked at it, he seemed a little willful. He encountered obstacles in the new field and instead of going back to what he was familiar with, he went to a new field.
He said, "Old Chu, you should persuade him."
Chu Jiangfeng took a sip of tea and said with a smile: "It's good to let this kid try something new. Young people should be more adventurous, otherwise it will be too late to regret it when they really don't have the energy anymore."
“Even if you hit a wall, there are benefits.”
Hitting the wall. Gu Zhizhong had a strange look on his face, these three words seemed a little familiar.
Two days flew by.
The May Day holiday is over.
In the evening, after finishing the experiment, Xu Qingzhou made a bowl of noodles with the leftovers from lunch. After eating, he sat at the table to study the data from this period.
According to Feynman's path integral theory, the probability amplitude (., propagator) of a particle starting from point A appearing at point D is the sum of the probability amplitudes of all possible paths: K(D, A) = c exp[(￡)]]
ψ(y, 0) is the spatial wave mode function when the electron wave reaches slit B.
Xu Qingzhou is currently planning to use path integrals to describe the phase changes of the wave function, and once enough data is collected in the future, he will compare it with the phase changes between entangled particles.
8 pm.
"Whoo~"
Xu Qingzhou let out a breath, got up and went to the sofa. By this time, Song Yao should be almost done with her work.
Seeing Xu Qingzhou go to the sofa, Ermao came out of his nest.
It now has experience and will only come over to ask for a hug after the two-legged animals have come to the sofa.
Xu Qingzhou sat cross-legged on the sofa, holding Er Miao in his arms, reading messages on his mobile phone in one hand and hooking Er Miao's chin with the other hand.
Seeing that Song Yao sent him a message saying that she had arrived at the hotel, he directly made a video call, and soon, the beautiful face of the school beauty Song appeared on the screen.
He asked, "Are you done?"
Song Yao fell on the bed and said, "Well, I just got back to the hotel, Teacher Xu, I met a lot of people today who I only saw in papers before."
"Do you feel that these people are different from what you imagined?" Xu Qingzhou asked with a smile.
"Well, I met an old lady today. She was very kind, but the articles she wrote were very sharp, and..."
Song Yao talked about what she saw and heard in the day, for example, Li Daiyue took her to meet many big names in the field of economics.
Xu Qingzhou listened quietly, responding from time to time to show that he was listening carefully.
In his arms, Er Miao was snoring and had fallen asleep. After the heating was turned off, it found an opportunity to pounce on him and Song Yao. After just a few strokes, it would squint its eyes and become drowsy.
"Teacher Xu, I won't be back for another 6 days."
"I still have to stay alone in an empty room for 6 days." Xu Qingzhou is very good at taking advantage of others. "My boyfriend has been lonely for so long, so he should give me some compensation when he comes back?"
"I've waited for you at home before."
"You can also let me make it up to you, Teacher Song. I can do anything."
"shameless."
5 month 6 day.
Xu Qingzhou's experiment went smoothly.
At the same time, at the University of International Business and Economics, the classroom atmosphere was somewhat depressing.
"Senior Li Heyong said that the realization of IPC requires the use of direct method for calculation, but the matrix decomposition process of direct method is complicated, and our project is not cost-effective."
"This project is indeed too complicated." Xing Yunyi sighed, paused, looked at Guo Ziyang and said, "How about we make some changes and simplify it into parallel computing and acceleration technology?"
"Senior, this project seems a bit difficult for us." The boy with glasses also said.
Guo Ziyang frowned, thought for a moment, and shook his head: "Last year, a senior student worked on parallel computing and acceleration technology, and it was a key project in the institute. I don't think we can come up with anything new."
"It's the same when doing projects. How can we come up with something different right away? We can follow the steps of our seniors first, and then try new things when we have more experience."
Xing Yunyi said indifferently.
Guo Ziyang said in a deep voice: "I disagree. Isn't the original intention of establishing this project to create something of our own?"
"Zi Yang, we have to face reality. Apart from computing, genetic algorithms, particle swarm algorithms, materials science and contact mechanics are not simple. There is basically no hope for just a few of us."
"How can you know if you don't try? I'll solve the IPC problem."
Xing Yunyi smiled and said, "How do you solve it? Even Senior Li said it takes a lot of energy."
He continued, "Zi Yang, since you have confirmed it, I can only say, sorry, I plan to withdraw from this project."
"Senior, I'm quitting too." said the boy with glasses.
Guo Ziyang did not try to persuade him. Even though he was a rather dull person, he could feel that Xing Yunyi was competing with him for the right to speak, so it would be better for him to leave.
He turned and looked at the last member, Qi Lan.
Xing Yunyi also looked at Qi Lan. He was very happy to see that his competitor was the only one left. At the same time, this also proved that he was right.
Qi Lan was a little nervous, but she didn't think too much about it. She said weakly, "I support continuing the research on elastic contact simulation."
"I wish you all the best." Xing Yunyi shrugged and stood up with the boy with glasses.
"Thank you." Guo Ziyang replied indifferently.
The team of four people disbanded, leaving only Guo Ziyang and Qi Lan in the classroom.
Qi Lan looked at Guo Ziyang with a melancholy expression: "Senior, what should we do now?"
"Of course it's recruiting soldiers and buying horses."
Guo Ziyang was quite open-minded. He said, "You are responsible for the calculation of contact stress, analysis of contact deformation and establishment of contact constitutive equation."
Qi Lan asked hesitantly: "What about the IPC issue?"
Guo Ziyang thought about it and said, "This part is really difficult. I'll go find some external help."
"Ah, there is foreign aid?"
"Well, I didn't intend to trouble him, but now I can only use him as a tool."
Qi Lan said: "Senior Li Heyong said it was very troublesome" "If he said so, it should be no problem."
"Is this foreign aid very powerful?" Qi Lan asked curiously.
"He was okay. He was about the same as me in high school, but he switched to study mathematics in college." Guo Ziyang felt a little emotional. Xu Qingzhou was obviously good at physics in high school, but he actually switched to study mathematics in college.
"Similar to you?" Qi Lan was stunned again, and suddenly felt that she should have run away just now. This senior didn't seem very reliable.
"He's only slightly better than me. As for who he is, let's keep it a secret for now."
Guo Ziyang decided to play it safe and first find Zhouzi to confirm whether he could do it, so as to avoid being humiliated.
Yandong Garden.
Xu Qingzhou turned the pen in his hand and looked at the information Guo Ziyang sent him.
"IPC"
After reading the materials, Xu Qingzhou downloaded more than a dozen of the most advanced academic papers at home and abroad, and had a general understanding of this thing.
The core technology of IPC is not complicated.
The first is the incremental potential energy contact algorithm, which transforms the contact problem into a potential energy minimization problem.
Secondly, all collision scenarios are rigorously defined mathematically, including dimensionality reduction acceleration of the obstacle function method, controllable modeling of static-dynamic friction conversion, and clever discretization of the friction operator.
Local barrier function, avoids penetration by constructing a smooth local barrier function, which increases as the distance decreases and approaches infinity when the distance approaches 0, thus achieving a simulation effect without penetration.
According to Guo Ziyang, it is necessary to use nonlinear optimization with barrier functions and matrix operations to establish a mathematical modeling so that they can improve accuracy and efficiency and enhance the stability of the simulation.
"If we follow Guo Ziyang's requirements, it won't be that difficult."
The reason for adding "if" is that Xu Qingzhou found in the process of searching for information that many research teams are currently working on improving IPC.
Due to the ill-conditioned nature of matrices, the implementation of IPC often requires the use of direct methods for calculations. However, the matrix decomposition process of the direct method results in a huge memory footprint, and the entire process is complex and computationally intensive.
Xu Qingzhou hooked the chin of Ermao who had just jumped onto the table, and also made an arrangement. He would first build the model in the conventional way. If he had any ideas during this period, he could try to improve the IPC.
"It just so happens that I have something to do while I am guarding the experiment and collecting data."
To compare phase relationships, it is necessary to collect a large amount of data information generated by the AB effect.
Only with samples can we continue to make inferences, so Xu Qingzhou has a lot of free time during this period.
5 month 10 day.
"Don't worry, everything will go well."
"Then I feel relieved. I will brag about it and say that there is absolutely no problem with my foreign aid."
"I found two more people, a sophomore majoring in materials science, and a junior student majoring in computer science. Xing Yunyi, who previously worked with me, also started a project."
Guo Ziyang said a lot of nonsense, "Okay, Zhouzi, I won't talk nonsense with you anymore. I have something else to do."
"Fuck, you make me sound like I have a lot of free time."
In Yan Dongyuan, Xu Qingzhou hung up the phone with a curse on Guo Ziyang and continued to cut the meat.
On the gas stove, the pork rib soup was bubbling with steam.
School beauty Song is going home today.
Xu Qingzhou cut all the vegetables. Seeing that it was already 5: in the afternoon, he turned off the fire, washed his hands, and went out to meet someone.
After waiting at the gate of the community for 10 minutes, a business car appeared in sight.
There were 8 people from Peking University attending the forum. The others got off the bus along the way and at the school gate, so at this time there were only Song Yao and Li Daiyue in the bus.
"Goodbye, Professor Li."
Xu Qingzhou and Song Yao greeted Li Daiyue in the car.
Li Daiyue nodded slightly and looked at Song Yao, "Xiaoyao, you should have a good rest."
After saying that, he signaled the driver to drive.
"Teacher Xu~"
Song Yao hooked her arms around Xu Qingzhou's neck, her eyes sparkling.
Xu Qingzhou was also a little moved and lowered his head to kiss her.
The sun was hanging brightly in the sky, and a breeze was blowing, making a rustling sound on the leaves.
Li Daiyue looked at the two people hugging each other and sighed secretly in her heart. This student of hers was completely in love with Xu Qingzhou.
Fortunately, from the current point of view, the relationship between the two is very stable.
However, she still had a little worry in her heart.
Xiaoyao is stubborn, indifferent, and even strong. Xu Qingzhou must be no pushover to achieve his current success. Two such strong-willed people together...
The gate of the community.
"cough~"
When Xu Qingzhou and Song Yao were engrossed in the story, they suddenly heard the aunt next door cough lightly.
Song Yao came back to her senses and suddenly remembered that she was outside. She blushed and buried her head in Xu Qingzhou's arms, unable to help but stick to Xu Qingzhou.
The aunt shook her head and muttered before leaving: "Young people nowadays don't know how to pay attention to the influence. Why are they filming idol dramas?"
Xu Qingzhou smiled and joked: "Did you hear that, young man? Be careful of the impact."
puff~
Song Yao didn't say anything, she just gave this guy a slap, glared and said: "You kissed me first."
"You seduced me first. Okay, okay, it's my fault. I got impatient."
Xu Qingzhou gave in, dragged his suitcase, and walked towards the community holding the hand of School Beauty Song.
When I entered the room, Er Miao was already waiting on the shoe cabinet.
After changing her shoes, Song Yao opened her arms to Xu Qingzhou. She was disturbed just now and now wanted to continue the intimacy.
Xu Qingzhou certainly saw it, but he had a bigger plan. He pretended not to know and picked up Er Miao and held him to her: "You missed Er Miao, right?"
"."
Song Yao felt a little depressed and snorted.
Xu Qingzhou was still pretending. He glanced at Song Yao's resentful eyes and said, "Please sit down for a while. The food will be ready soon."
"okay."
Song Yao nodded and sat down holding Er Miao.
After teasing Er Miao, she looked up. There was no change in the house. It was clean and tidy, the air was fresh, and it seemed to be ventilated frequently. There was not much of the smell that came from having a cat.
He also bought some red wine on the table.
Hearing the sound of cooking in the kitchen, Song Yao thought to herself, "This guy used to say that the first thing he wanted to do when he got home was not to eat, but now he's cooking."
Even more resentful.
However, before he came back, Xu Qingzhou kept talking about asking for compensation for staying alone in an empty house. Now that he is back, he doesn't mention it anymore and even refuses to get any.
Song Yao's eyes darkened and her expression became serious. Something was very wrong. There must be a conspiracy.
She looked around, her eyes fell on the red wine, and she suddenly understood something.
After drinking, people are always prone to impulsiveness.
(End of this chapter)
