Chapter 75 Xu Qingzhou is really not a human being! Time passed slowly. The midday sun shone through the leaves, leaving mottled shadows on the lawn outside the window. A gentle breeze blew, and two dead leaves fell with the wind. During the entire morning, Xu Qingzhou completed the preliminary sorting of the existing data and used Python to clean the latest set of sample data. During this period, Gong Yunfei came to see him once, and it was obvious that Xu Qingzhou was absorbed in his thoughts, so he did not disturb him. "Junior brother, take a break and go eat." Hong Yayu's voice pulled Xu Qingzhou back. Turning around, he saw that Hong Yayu had taken off her work clothes. Xu Qingzhou stretched and said, "Senior Sister, I want to take this data back and study it slowly." Hong Yayu nodded and pointed to the hard drive next to her. "You can copy it here, but the amount of calculation is very large and it requires a lot of computer configuration." "Okay, I understand." Xu Qingzhou nodded. His computer cost him yuan, so it should be no problem for him to process some data. After connecting the computer and copying the data, he and Hong Yayu walked out of the laboratory. "Brother Gong is still going to monitor the experiment?"
"Well, when you were looking at the data just now, he went out to eat." Hong Yayu didn't say much. She just nodded slightly and took Xu Qingzhou across Zhongguancun North Street. "Sister, what are we going to eat?" "Let's go eat beef noodles in the Fifth School Canteen today." Hong Yayu said, and added: "Of course, you can go eat other things." "I also want beef noodles." Xu Qingzhou nodded with a smile. The beef noodles in the Xuewu Canteen are indeed good. Hong Yayu nodded slightly, showing an expression that she was very knowledgeable, took a few steps, and asked again: "You looked at the experimental data today, how do you feel?" Xu Qingzhou asked why Hong Yayu suddenly asked him out for dinner, it seemed like she came to show her concern. It was just like Gong Yunfei said, although this senior sister looked cold, she was quite caring. He said: "It's more difficult than pure math problems, but I already have some ideas." “Is this your first time participating in a research project?” "Correct." "you're good." The two chatted casually and walked into the cafeteria of School 5 before the get out of class was over. Hong Yayu really has no idol burden and eats more than Xu Qingzhou, a bowl of beef noodles, three fried buns, and even a pot cake. When the two were almost done eating, more and more people came to the cafeteria, and at 12:10 noon, people who were leaving get out of class had already arrived. Hong Yayu suddenly looked behind Xu Qingzhou and asked, "Do you know that girl?" Xu Qingzhou turned his head in confusion and saw a figure disappearing around the corner as if running for his life. The figure seemed familiar, but he couldn't remember who it was. "I didn't see clearly who it was." Xu Qingzhou felt helpless. Hong Yayu was eating, not paying much attention to who this person was, but added: "She was taking pictures of us just now." Xu Qingzhou turned his head to look again, feeling puzzled. Or, was he so handsome that he needed girls to take secret photos of him? Neither of them took what happened just now to heart and went straight back to the laboratory after dinner.
At the same time, at the corner of the restaurant, Zhang Qiong patted his chest and thought to himself, it was a close call, he was almost discovered. She tilted her head to take a look and found that the two people had left. Xu Qingzhou was having dinner with the girls again! This is the second one! Having Song Yao alone is not enough, he is always flirting with other girls. In just a few days, he has changed another girl! Zhang Qiong gritted her teeth, flipped open the photo, stared at the boy in the photo, her eyes darkened, "Xu scumbag, just wait, sooner or later I will expose your true colors and make you die without a burial place!" "Xiao Qiong?" The voice was clear and cold. "Ah?" Zhang Qiong was startled and suddenly put the phone behind her back, looking nervously at the beautiful girl opposite her. "Didn't you go to get a rice bowl?" Song Yao was puzzled. Zhang Qiong's expression was so strange. At first he was fierce, like a bad guy, and then he looked like he had done something bad and was discovered. Zhang Qiong reacted quickly, found an excuse, and said, "Yes, rice bowl. I suddenly want to eat the same thing as you guys." "Then go quickly, we'll wait for you over there." Song Yao pointed to an empty seat nearby. "Okay." Zhang Qiong nodded with a smile. So, Song Yao and Zhong Ruotong went to their seats first and waited for Zhang Qiong. After a while, Zhang Qiong came over with a plate and sat next to Song Yao. She couldn't help but ask, "Xiaoyao, why haven't I seen you go to see Xu Qingzhou these two days?" "He..." Song Yao paused for a moment, her expression slightly dejected. "He's been very busy lately, I don't want to disturb him." Zhang Qiong felt distressed when she saw this and sighed secretly, thinking that he must be busy, busy dating other girls. Xiao Yao had too little emotional experience and was easily deceived by the scumbag Xu. Looking at the beautiful girl next to her, she felt more and more that Xu Qingzhou was not a human being who had the heart to deceive such a good girl. "Have you decided which club you want to join?" Zhong Ruotong mentioned another thing. Song Yao was a little distressed and said, "I don't have any clubs I want to join." "During this period, many seniors have come to invite Xiaoyao, and even I am a little headache." Zhang Qiong complained. When freshmen enter school, besides military training, the second thing they do is club affairs. The campus atmosphere was very lively. The Yanyuan Triangle was holding a club recruitment activity in full swing, commonly known as the Hundred Regiments Campaign. Xu Qingzhou really had no interest in this. After two classes in the afternoon and dinner, Xu Qingzhou declined Xu Zhengyang's invitation to visit Triangle Land, found an empty classroom, spent two hours finishing the paper, filled in the information, and directly clicked to submit it to Physics Reports. Only after finishing the thesis did he produce the data from the laboratory. We had a good start in the morning and everything went much more smoothly afterwards. At 11 o'clock in the evening, before the administrator kicked him out, Xu Qingzhou had already established a simple mathematical model. The sigmoid function (logistic function) is used to describe the change of resistance with temperature. This is a continuous function with an increasing rate of change. It has an "S" shaped curve, which can well describe the transition from the normal state to the superconducting state. At the same time, an equation model that depends on the magnetic field strength and temperature was established. Then fit the model parameters and input the data for verification. Using Python, calculate the critical current density under magnetic field strength: def critical_current_density(B, J0=1e10, Bc=10, n=2): After all, it is just a preliminary model, so there are many discrepancies between the first verification and the actual measurement, and data optimization and improvement will need to be continuously brought in later. This is also the reason why Professor Zhao Shengwen sought help from the School of Mathematics. Just a small model requires complex calculations, let alone a complete large model that can describe the performance of niobium-titanium alloy.
(End of this chapter)