Chen Zhou, who returned to the dormitory, of course, did not wash up and sleep immediately.

He took out the set of mistakes and began to sort out the mistakes accumulated during this time of team training.

Chen Zhou deliberately didn't turn over the wrong question set, just to wait until now.

These bugs, like the mistakes made in the first team training, were actually fixed and resolved after they passed the model validation.

Therefore, after Chen Zhou opened the set of mistakes and read these mistakes, these mistakes disappeared.

Of course, Chen Zhou deliberately stayed until now, definitely not to make them disappear at a glance.

Closing the set of mistakes, Chen Zhou began to think back to these questions and analyze the reasons for these mistakes.

The main reason is that the theoretical analysis is not rigorous enough, and the calculation causes deviations.

The solution is also very simple, avoid it at the source.

In the theoretical analysis stage, try to improve it as much as possible.

Mistakes are stepping stones to growth, and learning from mistakes is Chen Zhou's purpose at the moment.

At 11 o'clock in the evening, Yang Yiyi began to urge Chen Zhou to wash up and go to sleep.

Chen Zhou, who thought he wouldn't be able to sleep, didn't expect that as soon as he lay on the bed, his mind was full of competition-related content, and he didn't feel sleepy at all.

Sure enough, I was a little excited to participate in an international competition for the first time.

Tossing and turning, Chen Zhou didn't know how long it was, he finally forced himself to fall asleep.

Early the next morning, the alarm clock rang, and Chen Zhou got up with a yawn.

After thinking about it, Chen Zhou decided to force himself to sleep for a while in the afternoon.

At the washstand, after tidying up his handsome face, Chen Zhou and Zhao Qiqi went to breakfast.

At the end of the geometry class in the morning, Chen Zhou returned to the dormitory and brushed the book again until Yang Yiyi called.

After the two had lunch together, they walked around the campus of Yan University to eliminate their appetite.

Then, Chen Zhou returned to the dormitory and continued to read books.

At two o'clock in the afternoon, Chen Zhou closed the book, sent a message to Yang Yiyi, and climbed into bed to get ready to sleep.

Li Li, like Chen Zhou, was crooked on the bed.

Even if you can't sleep, it's good to rest and refresh yourself with your eyes closed.

Zhao Qiqi and Zhu Mingli glanced at each other, silently lowered their heads and continued to read, but the movements of reading the book were as light as possible, so as not to disturb Chen Zhou and Li Li.

According to their experience in participating in competitions in the past, Chen Zhou and Li Li are unlikely to be able to sleep at this time.

Li Li may be a little better, after all, he has experience in participating in competitions and knows how to self-regulate.

But Chen Zhou may be more nervous at this time because of his inexperience.

The two of them thought so, but they heard Chen Zhou's slightly heavy breathing.

Chen Zhou fell asleep.

At the same time, the two of them thought in their hearts, Nima, the eldest brother is the eldest brother, and they can't look at it according to common sense......

There's no way, Chen Zhou was already nervous last night, and now he is indeed a little sleepy.

Chen Zhou probably slept for more than an hour, and after waking up, he did not open his eyes, but continued to lie down.

Until his alarm went off at half past four.

Chen Zhou rubbed his sleepy eyes, got down from the top bunk, and took the towel basin to wash up.

The competition is the venue for his handsome performance.

4:50 p.m.

Chen Zhou and Li Li walked out of the dormitory together.

Downstairs in the dormitory, I will first meet Yang Yiyi and Li Jing, and then go to the cafeteria to wait for Fang Jieming and Xu Neibo.

Xu Neibo is the bespectacled little fat man in Li Li's team.

5:20 p.m.

After finishing dinner, they went to the computer room prepared by Yanda for this UPC competition.

At 5:30, arrive at the computer room.

At this time, there were already more than a dozen teams in the computer room.

According to the group number obtained from the registration on the official website, Chen Zhou, Yang Yiyi, and Fang Jieming found the location of their team.

Their group number is 413.

According to the registration information published on the official website of the UPC competition, as of 6 hours before the start of the competition, a total of 201 universities, 2,004 teams and 6,012 students from 57 countries around the world have signed up for the competition.

Although the UPC organization has not been carried out for a long time, the speed of development is still very fast.

This is also due to its good competition atmosphere and targeted competition topics.

5：40。

All the participating teams are present, and the instructors in charge of their respective teams are also in place.

On each computer, the webpage of the UPC official website was opened, and the competition began quietly.

Chen Zhou looked at Yang Yiyi and asked softly, "Are you nervous?"

Yang Yiyi shook her head: "It's okay." ”

Chen Zhou said again: "I paid attention to it, and it seems that it is really the same as what you said, among these teams, only we are couples participating in the competition." ”

Yang Yiyi smiled and said, "I didn't lie to you, did I?"

Chen Zhou smiled and nodded.

Fang Jieming on the side looked at the two of them with complicated eyes.

At 6 p.m., the UPC kicks off.

Everyone refreshes the webpage and starts looking at the contest questions.

【Problem A：Circumbinary Planets】

【Problem B：A Water Fountain】

Chen Zhou looked at these two questions and frowned slightly, question A is orbiting a double star, question B fountain, what about the space vehicle?

When Chen Zhou frowned and pondered, he heard a lot of "sleeping" sounds in the computer room.

It seems that everyone did not expect that the questions of the competition would directly change from the problems related to spacecraft to the celestial bodies themselves.

As for question B, a small fountain with great wisdom may not be much simpler than the movement of celestial bodies.

Yang Yiyi is also thinking about these two questions, which one should be chosen.

Seeing that the two had not spoken, Fang Jieming asked, "Chen Zhou, how do you say, choose A or B?"

Chen Zhou did not answer directly, but glanced at Yang Yiyi.

It's just that before Chen Zhou could speak, Yang Yiyi said: "Chen Zhou, do you know the Cowherd Star and the Vega Star? They are called double stars, although they are not binary star systems in the actual sense. ”

After a pause, Yang Yiyi looked at Chen Zhou and continued: "Choose A, how interesting it is to study stars." ”

Hearing Yang Yiyi's words, Chen Zhou smiled slightly: "Then choose A, let's study the double star." ”

After speaking, the two looked at the third person next to them together, intending to ask for their opinions.

Fang Jieming glanced at the two of them helplessly: "I also think it's interesting to study the stars......

Hearing the conversation between the three of them, the faculty member on the side couldn't help but smile, and she had also read the posts on the campus network.

It's just that I saw it with my own eyes today......

Of course, Chen Zhou did not blindly choose question A, he remembered that when he was reading astrophysics-related literature and books, Yang Yiyi also read a lot on the side.

Moreover, it is more certain that it is still the orbiting double star of question A compared to question B.

Such the best of both worlds must be grasped!

No longer hesitate, the direction has been chosen, and the next step is to solve the problems on this road.

Question A is followed by a description of the relevant topic.

[Suppose there are two stars, one with a mass of 50% of the Sun and the other with the same mass as the Sun.] This binary star system has an orbital period of 30 Earth days. If there is a planet in this system, where is the stable orbit of the planet? 】

The information on the topic is not long, and the question is just one sentence.

However, how to extract the cocoon from the short information, find out the most basic physical principles, and solve the problem is not simple.