Chapter 348

Physics Department, Condensed Matter Physics Laboratory.

Press the start button, and the equipment emits a low humming sound.

Xu Qingzhou first looked at the test data on the screen and found no abnormalities.

"The next part is boring waiting."

Xu Qingzhou let the equipment continue to collect data and took out the materials given by Professor Zhao Shengwen on the table next door.

【After cycling 5000 times at a high current density of 5000mA·g^–1, the discharge specific capacity remains at 663.2mA·h·g^–1, which is still higher than the theoretical specific capacity of commercial graphite anode materials (372mA·h·g^–1).】

The final result is not bad, with an increase of about 10% in power storage.

After getting busy, time seemed to be pressed on the fast-forward button. In a blink of an eye, it entered May. The two went out to go shopping on the 1st and lazed at home for another day. On the morning of the second day of the Labor Day holiday, Xu Qingzhou sent Song Yao to meet with Professor Li Daiyue and the others.

And he went directly to the laboratory, checked the operation of the equipment, and began to read the materials.

In the villa area of Jingda professors, Chu Jiangfeng and Gu Zhizhong were drinking tea. Besides chatting about mathematical problems like before, the topic was about Xu Qingzhou.

Gu Zhizhong added tea for his old friend and asked: "How is Xu Qingzhou doing lately?"

Chu Jiangfeng sighed and said helplessly: "He ran off to do physics."

"Physics?" Gu Zhizhong's hand holding the tea stiffened, his expression stunned, "Why did this kid run to the Physics Department again?"

Chu Jiangfeng told him about Xu Qingzhou's situation.

"He can't go on with harmonic analysis"

Gu Zhizhong didn't know what to say for a moment. No matter how you look at it, it seems a bit willful. Encountering obstacles in a new field, instead of returning to what he is familiar with, he went to another new field.

He said: "Old Chu, you should persuade him."

Chu Jiangfeng sipped his tea and said with a smile: "It's good to let this kid try new things. Young people should have some drive, otherwise it will be too late to regret when they really don't have the energy later."

"Even hitting a south wall has its benefits."

Hitting a south wall... Gu Zhizhong's expression was strange; these three words seemed a bit familiar.

Two days passed in a flash.

The May Day holiday was over.

In the evening, after finishing the experiment, Xu Qingzhou mixed a bowl of noodles with the leftovers from noon. After eating, he sat at the table to study the data from this period.

According to Feynman path integral theory, the probability amplitude (i. e., propagator) of a particle starting from point A and appearing at point D is the sum of the probability amplitudes of all possible paths: K(D, A) = Cexp【(￡)】】

ψ(y, 0) is the spatial wave mode function of the electron wave reaching slit B.

Xu Qingzhou is currently planning to describe the phase change of the wave function through path integrals, and after enough data is collected in the future, he will compare it with the phase change between entangled particles.

8:00 PM.

"Phew~"

Xu Qingzhou exhaled and got up to go to the sofa. At this time, Song Yao should be almost done with her work.

Seeing Xu Qingzhou go to the sofa, Er Miao came out of its nest.

It now has experience; only when the two-legged beasts are on the sofa will it come over to ask for a hug.

Xu Qingzhou sat cross-legged on the sofa, holding Er Miao in his arms, holding his phone with one hand to check messages, and hooking Er Miao's chin with the other.

Seeing Song Yao send him a message saying she had arrived at the hotel, he directly dialed a video call. Soon, the School Beauty's beautiful face appeared on the screen.

He asked: "Are you done?"

Song Yao collapsed on the bed and said: "Yeah, I just got back to the hotel. Xu Laoshi, I saw many people today whom I had only seen in papers before."

"Do you feel that these people are different from what you imagined?" Xu Qingzhou asked with a smile.

"Yeah, I met an old lady today. She was very kind, but the articles she wrote were very sharp, and also..."

Song Yao talked about what she saw and heard during the day, such as Li Daiyue taking her to meet many big shots 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 already purring and asleep. After the heating was turned off, it now finds an opportunity to pounce on him and Song Yao, and as long as it's stroked a little, it squints its eyes, drowsy.

"Xu Laoshi, I still have 6 days before I come back."

"I have to keep an empty room for 6 days." Xu Qingzhou is very good at climbing up the pole, "Making your boyfriend lonely for so long, shouldn't you give me some compensation after you come back?"

"I've waited for you at home before too."

"You can also let me compensate you, Teacher Song, I can do anything."

"Shameless."

May 6th.

The experiment on Xu Qingzhou's side is going very smoothly.

At the same time, at the University of International Business and Economics, the classroom atmosphere is a bit oppressive.

"Senior Li Heyong said that the implementation of IPC needs to use direct methods for calculation, but the matrix decomposition process of direct methods is complex, and our project... is not cost-effective."

"This project is indeed too complex." Xing Yunyi sighed, paused, looked at Guo Ziyang and said: "How about we modify it slightly and simplify it into parallel computing and acceleration technology."

"Senior, this project seems a bit too much for us." The bespectacled boy also said.

Guo Ziyang frowned, thought for a moment, and shook his head: "Seniors from the previous batch already did content in parallel computing and acceleration technology, and it was a key project of the institute. We probably won't be able to come up with anything new."

"Isn't that how doing projects is? Where can you make something different as soon as you start? We can follow the seniors' footsteps first, and then try new content after we have experience."

Xing Yunyi said indifferently.

Guo Ziyang said in a deep voice: "I disagree. Isn't the original intention of us establishing this project to make something of our own?"

"Ziyang, we have to face reality. Besides computing, genetic algorithms, particle swarm algorithms, materials science, and contact mechanics are not simple. With just a few of us, there's basically no hope."

"How do you know if you don't try? I'll solve the IPC problem."

Xing Yunyi smiled: "How will you solve it? Even Senior Li said it would take a lot of energy."

He continued: "Ziyang, since you've already decided, then I can only say, sorry, I plan to quit this project."

"Senior, I'm quitting too." The bespectacled boy said.

Guo Ziyang didn't persuade them. Even though he is a bit wooden, he can feel that Xing Yunyi is competing with him for the right to speak, so it's better for him to leave.

He turned to look at the last member, Qi Lan.

Xing Yunyi also looked at Qi Lan. He was very happy to see that his competitor was left alone, and at the same time, this also showed that he was right.

Qi Lan was slightly nervous, but didn't struggle much, and said weakly: "I support continuing to study elastic contact simulation."

"Wish you success." Xing Yunyi shrugged and got up with the bespectacled boy.

"Thank you." Guo Ziyang replied lightly.

The team of four disbanded just like that, leaving only Guo Ziyang and Qi Lan in the classroom.

Qi Lan looked at Guo Ziyang, her expression melancholy: "Senior, what should we do now?"

"Of course, recruit troops and buy horses."

Guo Ziyang looked at it quite openly, saying that those who have different paths do not conspire, "You are responsible for the calculation of contact stress, the analysis of contact deformation, and the establishment of contact constitutive equations."

Qi Lan asked hesitantly: "What about the IPC problem?"

Guo Ziyang thought for a while and said: "This part is indeed very difficult. I'll find an external aid."

"Ah, there's an external aid?"

"Yeah, I didn't intend to trouble him originally, but now I can only use him as a tool."

Qi Lan said: "Senior Li Heyong said it's very troublesome" "For him, it should be no problem."

"Is this external aid very powerful?" Qi Lan asked curiously.

"It's okay. He was about the same as me in high school, but he switched to studying mathematics in college." Guo Ziyang felt emotional. Xu Qingzhou was clearly good at physics in high school, but he actually went to study mathematics in college.

"About the same as you?" Qi Lan was stunned again, suddenly feeling that she should have run away just now. This senior doesn't seem very reliable.

"Just a little bit better than me... As for who it is, let's keep it a secret for now."

Guo Ziyang decided to be steady and find Zhouzi first to confirm if it could be done, so as not to be slapped in the face.

Yandongyuan.

Xu Qingzhou twirled the pen in his hand, looking at the materials 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 he had a general understanding of this thing.

In one look

The core technology of IPC is not complicated.

First is the incremental potential contact algorithm, where the contact problem is transformed into a potential energy minimization problem.

Second is the rigorous mathematical definition of all collision scenarios, including dimensionality reduction acceleration for barrier function methods, controllable modeling for static-dynamic friction conversion, and clever discretization of friction operators.

Local barrier function: by constructing a smooth local barrier function to avoid penetration phenomena, the function increases as the distance decreases and approaches infinity as the distance approaches 0, thereby achieving a non-penetration simulation effect.

According to Guo Ziyang, it is necessary to use nonlinear optimization with barrier functions and matrix operations to establish a mathematical model to facilitate their improvement of accuracy and efficiency, and enhance the stability of the simulation.

"If it's according to Guo Ziyang's requirements, it's not difficult."

The reason for adding an "if" is because Xu Qingzhou discovered during the process of checking materials that many research teams are currently working on improving IPC.

Due to matrix ill-conditioning, the implementation of IPC often requires the use of direct methods for calculation, but the matrix decomposition process of direct methods leads to huge memory usage, and the whole process is complex and computationally intensive.

Xu Qingzhou hooked the chin of Er Miao, who had just jumped onto the table, and also had an arrangement: first build the model according to the conventional method, and if he has ideas during the period, he can try to improve IPC.

"Just right, I have something to do while waiting for the experiment to collect data."

Comparing phase relationships requires collecting a large amount of data information generated by the AB effect.

Only with samples can one continue to calculate, so Xu Qingzhou has quite a lot of free time during this period.

May 10th.

"Don't worry, everything is going smoothly."

"Then I'm relieved. I already bragged, saying that my external aid is absolutely no problem."

"I found two more people, one is a sophomore in materials science, and the other is a junior sister in computer science. Xing Yunyi, who worked with me before, also started a project..."

Guo Ziyang babbled a lot, "Alright, Zhouzi, I won't talk nonsense with you anymore, I have things to do."

"Damn, you make it sound like I'm very free."

Yandongyuan, Xu Qingzhou cursed and hung up Guo Ziyang's phone, continuing to cut meat with a "tap-tap-tap" sound.

On the gas stove, the pork rib soup was bubbling with heat.

The School Beauty is coming home today.

Xu Qingzhou cut all the vegetables. Seeing that it was already 5:30 PM, he turned off the fire, washed his hands, and went out to pick someone up.

Waiting at the entrance of the residential area for 10 minutes, a business car appeared in his line of sight.

There were 8 people from Jingda participating in this forum, and the others got off along the way and at the school gate, so at this time, there were only Song Yao and Li Daiyue in the car.

"Goodbye, Professor Li."

Xu Qingzhou and Song Yao greeted Li Daiyue in the car.

Li Daiyue nodded slightly and looked at Song Yao, "Xiaoyao, get some good rest."

After speaking, she signaled the driver to drive.

"Xu Laoshi~"

Song Yao hooked her arms around Xu Qingzhou's neck, her eyes crystal clear.

Xu Qingzhou was also a bit moved and lowered his head to kiss her.

The sun was hanging brightly in the sky, and a breeze blew, rustling the leaves.

Li Daiyue looked at the two people hugging each other and sighed secretly in her heart. This student of hers has fallen head over heels for Xu Qingzhou.

Fortunately, from the current point of view, the relationship between the two is very stable.

However, she actually still had a trace of worry in her heart.

Xiaoyao is stubborn, has a cold personality, and can even be said to be strong. Xu Qingzhou can achieve his current achievements, so he must not be a pushover. Two people who are so strong together...

Residential area entrance.

"Ahem~"

Just as Xu Qingzhou and Song Yao were engrossed, a light cough suddenly sounded from the aunt next door.

Song Yao came back to her senses and suddenly remembered that this was outside. She blushed immediately, buried her head in Xu Qingzhou's arms, and couldn't help but stick to Xu Qingzhou.

The aunt shook her head, and before leaving, she muttered: "Young people nowadays, don't even know to pay attention to influence. Are you filming an idol drama here?"

Xu Qingzhou laughed and teased: "Did you hear that? Young people, pay attention to influence."

Poof~

Song Yao didn't speak, directly gave this guy a punch, stared, and said: "You were the one who kissed me first."

"You were the one who seduced me first. Alright, alright, it's my problem, and you're even getting anxious..."

Xu Qingzhou conceded, dragged the suitcase, and held the School Beauty's hand as they walked toward the residential area.

Entering the house, Er Miao had long been waiting on the shoe cabinet.

After Song Yao changed her shoes, she opened her arms to Xu Qingzhou. She had been interrupted just now and wanted to continue the intimacy.

Xu Qingzhou naturally saw it, but this guy had a bigger plan. He pretended not to know and grabbed Er Miao to give to her: "You missed Er Miao, right?"

"."

Song Yao was a little depressed and let out an "hmm" in her nose.

Xu Qingzhou was still pretending, ignoring Song Yao's resentful eyes, and said: "You sit for a while, the food will be ready soon."

"Oh, okay."

Song Yao nodded and sat down holding Er Miao.

Teasing Er Miao, she looked up. There was no change in the house; it was cleaned up neatly, the air was fresh, and it looked like it was ventilated frequently, without much of the smell after raising a cat.

On the table, he even bought red wine.

Hearing the sound of stir-frying in the kitchen, Song Yao thought in her heart: "This guy used to say that the first thing he wanted to do when he came home wasn't eating, but now he ran to cook himself."

Even more resentful.

However, before she came back, Xu Qingzhou kept nagging about the compensation for keeping an empty room, but now that she was back, he didn't mention it at all, and even refused to cuddle.

Song Yao's eyes sank, her expression serious. It was very wrong; there must be a conspiracy.

She looked left and right, her eyes falling on the red wine, and she suddenly realized something.

After drinking, people are always easily impulsive.

(End of chapter)