Chapter 81 Brother Gong expressed great pressure Xu Zhengyang was the only one in the dormitory. Kong Xianbo was attending a meeting in the Student Union, and Zhai Ziqiang was participating in an activity at the Literature Club. Xu Zhengyang was playing games. Xu Qingzhou thought it was too noisy, so he took his computer to the study room and turned on the computer to read a paper on the application of niobium-titanium alloy in MRI. The mathematical model has been completed, and there are still some minor details that need to be corrected. Don't be in a hurry. We need to wait for new data to perfect it. Xu Qingzhou originally wanted to just read the paper, but after studying it, he found that it seemed that some other things could be added to the model. It rained at night on Monday. In the morning, the clouds cleared and the rain stopped. The sky was blue with only a few white clouds hanging in the sky. The sun poured down, wetting the trees on the ground. The puddles on the ground reflected the light. A few figures who were late for class hurried by. In the morning, Xu Qingzhou had Professor Gu Zhizhong's class. He skipped class for a good reason and went straight to the laboratory. He had planned to go to bed early last night, but when he was working on the model, he unknowingly worked until two in the morning. Physics laboratory. At 9:30 in the morning, Zhao Shengwen and Wang Wei were working on the instruments together. Xu Qingzhou did not disturb them and walked straight to the office area on the other side. There was a new girl in the office, with a bun on her hair. She was wiping the table with a rag in her hand. She looked calm and meticulous. Even though she was just wiping the table, she made it feel like a ritual.
Seeing Xu Qingzhou coming in, he was startled and introduced himself: "Hello, senior brother! My name is Ren Xiaoling, a 12th grade physics student. I hope you can give me your guidance!" Xu Qingzhou was startled by her enthusiasm. After coming back to his senses, he smiled and said, "There is a difference in seniority. My name is Xu Qingzhou, and I am a freshman of the 14th grade. I should call you senior sister." The postgraduate stage is different from the undergraduate stage. In the undergraduate stage, everyone is basically called seniors, but in the postgraduate stage, everyone has the same teacher and is considered to belong to the same school. "Ah? You are Xu Qingzhou?" Ren Xiaoling was stunned for a moment. Gong Yunfei had mentioned before that there was a junior fellow student who was also in the project. He was not a handyman like her, but the kind who really participated in the project. You are so young! You are only a freshman and you can participate in Professor Zhao’s project. Looking at Xu Qingzhou, Ren Xiaoling couldn't help but admire him secretly. Xu Qingzhou nodded, sat down at the desk, turned on the computer, and saw that the senior sister had been staring at him, so he took the initiative to say: "Senior sister, can I help you?" Ren Xiaoling came back to her senses and quickly shook her head, "Sit down first, I'll clean it up right away." Professor Zhao's projects are among the best in the school. This junior student can come here as a freshman, so he must be a big shot. Zhao Shengwen had also finished his work by then, and walked in with Wang Wei and the other two, "Xiao Xu is here." "Professor Zhao." Xu Qingzhou greeted with a smile, stood up, and gave his seat to Zhao Shengwen: "The model is ready, you can take a look." Zhao Shengwen turned on the computer, checked the model, input data, and performed simulations. After comparing the data, he was surprised, "This model is very good." He had specifically asked Wang Wei to help Xu Qingzhou yesterday, and Wang Wei replied that the little guy wanted to do it himself. Wang Wei took the report paper and looked at the output values on it. He was extremely surprised. He had hoped that this junior fellow would hit a wall and not be so young and impetuous, but he actually figured it out. "Junior brother, you are awesome." Gong Yunfei smacked his lips and exclaimed. Hong Yayu also showed an expression of surprise on her face. "Although the process was rather tortuous, it still lived up to everyone's expectations." Xu Qingzhou said modestly. After a pause, he continued, "Actually, I had some ideas last night. I wonder if you would like to hear them." Zhao Shengwen said seriously, "Tell me what you think." "Last night, I read a few papers in Physical Review Letters that added some interesting things to this model." As he spoke, Xu Qingzhou pulled out an A4 paper from the table and checked the calculations on it. "I added two universal function models to the underlying model of Maxwell's equations, and also added a few equations in fluid mechanics."
Xu Qingzhou wrote very quickly, and during the calculation process, he discretized the heat conduction equation into a solvable system of linear algebraic equations. When writing one of the steps, Zhao Shengwen interrupted: "Hey, the NS equation is calculated differently than usual." "Yes, I simplified the Navier-Stokes equation using Fourier transform, which makes the calculation much easier." "Good idea." Zhao Shengwen was extremely amazed. Judging from Xu Qingzhou's application of these equations, his foundation in physics was very solid. "When the induced electromotive force is caused by the change of magnetic flux, the effect of the electric field needs to be considered and the influence of the electric field needs to be calculated through the equation [\vec{B}\cdot \mathrm{d}\vec{A}= 0 ]" Xu Qingzhou started sketching on the manuscript paper, and he came up with all kinds of knowledge, such as electric field theory and fluid mechanics. Zhao Shengwen also went from being amazed at first to thinking seriously and immersed in calculations. Ren Xiaoling took a small notebook and wanted to take notes, but she soon began to not understand. Am I really that bad? Ren Xiaoling wanted to cry but had no tears. She observed carefully. Professor Zhao nodded slightly and asked questions from time to time. Wang Wei and Hong Yayu fell into deep thought, thinking about the steps. Then there was Senior Sister Gong, who was stroking her chin and trying to look like she was thinking, but she always felt as confused as she was. Gong Yunfei was indeed a little ashamed. He was not a mathematics major and calculation was his weak point. Those formulas were simply a disaster for him. Of course, he could stop and think about it, but Xu Qingzhou spoke too fast and some of the transitions were too smooth for him to react at all. Wang Wei and Hong Yayu are better, but some points are still obscure and there is no time to think about them carefully. "So, during the synthesis stage, heat treatment is carried out at a certain temperature to make the Nb plate and the Ti plate heat up and diffuse at the interface to form a NbTi solid solution. The remaining Nb or Ti diffused can also become pinning. Since Nb and Ti can appear in each NbTi layer, and their quantity and uniform distribution are guaranteed, it is beneficial to improve the superconducting performance." "In the experiment, we can try to control the cryostat between , which may bring unexpected results." After half an hour, Xu Qingzhou finished speaking and stopped to look at Zhao Shengwen and others. Hong Yayu frowned and said, "But at 8K, the material completely enters the superconducting state. Isn't too low?" “This requires specific experimental proof.” Xu Qingzhou spread his hands and said helplessly: "Compared to electromagnetism and materials science, I am more familiar with the quantum field. These contents are calculated based on current data. They are just for your reference." He really couldn't guarantee that this idea was correct. After all, it was not something he was familiar with. (End of this chapter)