Chapter 76: Encountering problems

Xu Qingzhou carried his schoolbag back to the dormitory. On each person's desk, there was a pile of club promotional leaflets.

"Lively." Xu Qingzhou clicked his tongue.

Xu Zhengyang was still browsing the club information on the promotional leaflets. Seeing Xu Qingzhou come back, he asked: "Old Xu, you really don't join any club?"

Xu Qingzhou put down his schoolbag and shook his head: "No, even if I join, I don't have time to go."

"I signed up for the Street Dance Club and the Guitar Club." Xu Zhengyang laughed, recommending to Xu Qingzhou, "Old Xu, why not come to the Street Dance Club? Those girls, tsk tsk, one is more spirited than the other."

"Didn't you say you were tone-deaf?" Xu Qingzhou was more concerned about the Guitar Club this guy joined. When taking a shower, he howled like a ghost, and few were in tune.

Xu Zhengyang rolled his eyes and retorted: "Can't a tone-deaf person have a heart that pursues dreams?"

"This guy was actually fooled by the beautiful minister of the Guitar Club." Kong Xianbo ruthlessly exposed, sighing, "And Old Zhai, also signed up for the Guitar Club."

Can't lose in learning, can't lose in staying up late for class!

Read! {

"Dong Shan is also in the Street Dance Club." Xu Zhengyang shrugged.

The boy took a deep breath, cheered up, and suddenly had a desire to win or lose in his heart.

In the dormitory, everyone continued to chat for a while. Except for Xu Qingzhou who didn't plan to sign up for anything, Kong Xianbo planned to sign up for the Student Union, and Zhai Ziqiang signed up for the Literature Club besides the Guitar Club.

Hearing these two words, Zhai Ziqiang, who had already closed his eyes, instantly had no sleepiness, opened his phone, and flipped through the blackboard notes taken in class today.

Niobium-titanium alloy is a material with zero resistance performance. But no matter how exquisitely and perfectly it is processed, physically speaking, there will be loss in the process of current transmission.

Xu Qingzhou didn't tease Zhai Ziqiang about wanting to learn musical instruments. It was not easy for Zhai Ziqiang's family to provide a Jingda student. Learning musical instruments and the like was not realistic. He smiled and looked at Xu Zhengyang: "Old Xu, you look at beauties, will Dong Shan be jealous if she knows?"

"Not sure yet." Xu Qingzhou sat directly in front of the office seat and said: "Wang Wang Shixiong, I want to take a look at the internal organizational structure diagram of each sample first."

This head, Xu Qingzhou didn't notice the strange look of the boy at all. He had already started to screen the data in detail. First, check the model. If the model is no problem, check the data, time, magnetic field strength... In the data after the 22nd sample, brought in, there are also a small number of problems.

"Good." Wang Wei was anxious, but still nodded slightly. Anyway, he waited for three days, so he didn't care about this moment.

"Study." Kong Xianbo answered sullenly.

He had met this person in the study room for two consecutive days, seemingly doing an extremely difficult calculation.

The boy couldn't help but sigh. Where did this great god emerge from?

The materials in the computer are very complete.

Bc(T)=B0*(1-T^2/Tc^2) Bc(T)=B0(1-T^2/Tc^2).

Another hour passed, Xu Qingzhou let out a long breath, leaning on the chair, he seemed to have fallen into a bottleneck.

For three full days, Xu Qingzhou was basically immersed in various complex data, as if finding the state when he presided over the experiment, maintaining the life of library, dormitory, and canteen. Rubbing his temples, Xu Qingzhou looked at the time and found it was 3:00 AM. The senior who stayed up late with him didn't know when he left. He simply turned off the computer, took his things, and went back to the dormitory to sleep.

When N is 0, pushing back, the current from the positive pole to the negative pole is 0 loss.

N is the speed at which the current density decreases with the magnetic field strength, which means that the 22nd sample had a problem during the 10th test. In the study room, except for Xu Qingzhou, there was another boy fighting. Looking at the data filled in front of Xu Qingzhou, and the thick draft paper, there were dense calculations written on it.

n is the rate at which current density decreases with magnetic field strength, which means there is a problem with the 10th test of Sample No. 22. In the study room, besides Xu Qingzhou, there was another boy struggling away, looking at the various data spread out in front of Xu Qingzhou, as well as the thick draft paper covered in dense calculations.

Thursday morning, the advanced algebra class ended, and Xu Qingzhou went straight to the laboratory.

The critical magnetic field strength Bc and temperature T relationship is:

Looking at Xu Qingzhou walking out, Kong Xianbo, who was lying on the bed, frowned, got up silently, got out of bed, and found the textbook for Math 1.

After three days of not seeing, this Wang Wang Shixiong seemed to have withered a lot.

Zhai Ziqiang said a bit embarrassedly: "I just want to learn a musical instrument myself."

Yes, if the experiment continues according to the current progress, by the 80th sample, the data in all aspects seems to be improving steadily, but once it goes further, to the 100th sample, the value of N will become 0.

"Junior, any progress?" As soon as they met, Wang Wei asked.

However, even so, by the evening of the second day, he only completed the establishment of the second set of models. While considering the influence of magnetic field strength on critical current density, he added temperature as a variable to optimize the model, making it contain the influence of temperature on critical magnetic field strength.

!.

Wang Wei was indeed very worried. Not only him, but Zhao Shengwen and Hong Yayu were all worried. Time waits for no one. According to gossip, Jin Ling University has already built the model and has started testing.

At 12:00 AM, Xu Qingzhou took a shower, hugged his computer, and went to the study room on the 3rd floor of the dormitory building.

Bc=B0*(1-(T/Tc)**2) #Calculate critical magnetic field strength if Bc raise ValueError("Temperature is too high for superconductivity.") Jc=J0*(1-B/Bc)**n return Jc Xu Qingzhou brought the numerical value in, and suddenly found several sets of abnormal data.

(B, T, J0=1e10, B0=12, Tc=4, n=1) The output value, N should be 2.

"Old Kong, what are you doing with the book late at night?" Xu Zhengyang was lying on the bed, looking at his phone and giggling.

Xu Qingzhou opened the computer, entered Python, and substituted this temperature-dependent critical magnetic field strength into the critical current density model.

Sample types include Nb-44Ti, Nb-46.5Ti, Nb-48Ti, Nb-50Ti, Nb-53Ti, Nb-55Ti... Besides the structure diagram, there is also a corresponding sample preparation composition table.

Besides the two main raw materials of Niobium (Nb) and Titanium (Ti), trace elements such as Hafnium (Hf) and Zirconium (Zr) were also added.

Xu Qingzhou constantly observed the structure diagrams of niobium-titanium alloy materials, and at the same time called up the sample preparation composition table to verify his guess.

Near 11:00, Xu Qingzhou looked at Wang Wei, who was organizing data opposite, and said: "I found the problem."

(End of chapter) ===== CHAPTER 77 =====

(End of Chapter)