Scholar’s Advanced Technological System

On September 12th, the competition is on schedule!

The day before the competition, Ark et al. took the school bus back from the new campus to the old campus, where they stayed in temporary accommodation arranged by the school.

The mattress and pillows are all ready, just take a sheet, and the irrelevant person can even go directly to the individual. After all, although the game lasts 72 hours, the average bedtime on everyone may be less than 10 hours.

That's the case with an ark, for example.

His task was the most onerous and he had the greatest amount of work to do. He could only take a break the next day, so he simply didn't bring any clothes to change and went without a hand. And the first thing that comes to the new dorm is to lie down in bed and sleep.

If you can't sleep, you have to force yourself to sleep.

The next morning I woke up at 5: 00, closed my eyes in bed and twisted to 7: 00. I went to the canteen for breakfast. Ark Boat and Wang Xiaodong and Lin Yuxiang, together, went to the special computer room for the mathematical modeling competition.

According to officially published registration information, the competition has more than 70,000 college students from 33 provinces, cities, autonomous regions (including Hong Kong and Macao) and a total of 1338 universities in the United States and Singapore. At the same time, the competition website is clicked to download the topics for participation.

The competition was co-sponsored by the Department of Higher Education of the Ministry of Education and the China National Institute of Industrial and Applied Mathematics, which, although slightly less influential due to its rigour and impartiality in judging the Challenge Cup, in some ways had a higher gold content than the Challenge Cup.

At 7: 30 a.m., the computer room was already full of 10 teams.

Although many people choose to answer questions with their own laptops, they usually take their computers to the computer room. After all, only the computer room and the library wifi can download papers free of charge from Chicago. This kind of competition is expected to be won by Baidu's untested materials, rather than automatic completion of papers such as the burning of incense.

Teacher Liu came around and smiled and said hello to the three Ark Boats. She didn't talk about the competition, so she said, "How was the rest of last night?”, “Old campus dormitories not used to?” And then I wandered outside the computer room and drove back to the new campus to work on my project.

At eight o'clock, the bell rings.

Everyone quickly logged onto the website and downloaded the topic.

According to the rules, the topics are divided into four major ABCD topics, of which AB belongs to undergraduate groups and CD belongs to specialist groups. Each group selects a question to complete and upload the MD5 code generated from the official website software within 72 hours and upload the PDF paper corresponding to the MD5 code on the day the competition ends.

Generally, the choice must be kept within half an hour and everyone is competing for a second to read the question.

And yet, as soon as they saw the subject, everyone was foolish.

“A Question 3 Soft Landing Orbit Design and Control Strategy… B Question Creative Tablet Folding Table?! What the hell is this year's topic? ”

“MMP, nothing like the training we do! ”

“I seem to have done something similar the other day, like designing a launch plan for a Shenzhou rocket... but I don't think such a subtle subject will come out of it, I didn't expect it... carelessly! ”

“Grass grip, boss, aren't you 95 points tall? Do something! ”

“I'm learning high numbers, not how to fucking go to heaven! ”

“Designing a table… what can a table design, isn't it just four legs? Foldable... we put a spring on the back of the stool leg? ”

The computer room was quite lively, and as you can see, the students were forced by the whole topic, so there was nothing they could do.

But there are also masters in it.

For example, the second student in the Ark class, Buro Rundong, is talking calmly to his teammates.

And Liu Rui... The kid seems to have a very reliable thigh in the team. By now, he has read the title and started assigning work to two teammates.

Looking at the two topics downloaded from the official website, Wang Xiaodong's eyebrows locked.

The paradise begins.

Both topics are related to physics.

The first relates to orbital computation in astrophysics. High school physics alone is certainly not enough. Question B is superficially simple, but it is not much easier than the first question. It involves dynamic motion analysis of table legs, material stress analysis and other issues. It involves more than just mathematical modelling knowledge. It requires a certain degree of hunting for structural mechanics as well as materials science and even ergonomics.

……

“Mathematical genius” in the team, just in sophomore year, even just starting physics class.

There's no other way, so take it easy.

The first is not enough physical knowledge to do it completely, and the second is able to gather information through the web and find ways to translate it into mathematical problems.

Wang Xiaodong looked at the ark, “Why don't you choose B? ”

The ark shook its head: "Select question A. ”

“A question?” Wang Xiaodong frowned, "are you okay? ”

“I've finished my university physics, and although space physics seems complicated, it's just the first three chapters after all," paused for a moment, the ark swept the team next to it, and continued, "And you can see that there are enough people in this computer room to choose question B. ”

AB questions are chosen separately, and in such a frightening situation as A questions, there are bound to be a lot of candidates for B questions. At this time, you should take the courage of "knowing there are tigers in the mountains, preferring to walk in the mountains”, leave the uniwood bridge to the thousands of army horses, and take your own Yangguan Avenue in a dazzling manner!

Of course, this is also the choice that the Ark made when it was confident in its heart that question A.

Wang Xiaodong nodded expressionlessly and naturally understood the meaning of the last sentence of the Ark.

“Well, I'll leave the modeling to you. ”

“Wrapped on me. ”

Eye contact, two scholars have reached consensus.

Lin Yuxiang looked at the two teammates who had reached a consensus and asked weakly: “Is there anything I can do to help? ”

Wang Xiaodong revealed a smile that he thought was very gentle. He said he was just about to come handsome and say, "Just give it to me." However, before waiting for him to brew feelings on that paralyzed face, he was burying his head on the ark of A4 paper to calculate the draft, and he didn't lift his head. He said, "Bring rice, bring water, please. ”

Modeling, programming, and dissertation are all missing people, so there's no running errands.

Don't think lying down and winning is such a good idea, don't let this guy do his job, the ark is unbalanced.

Wang Xiaodong: “…”

Lin Yuxiang didn't complain, he nodded very energetically: “Mmm-hmm, it's on me! ”

The advantage of mathematical modeling and thesis writing being accomplished by one person is that a lot of work that requires two people to communicate to accomplish can be accomplished by one person, and there are no problems such as teammates' ability to cooperate with acquiescence and express understanding.

Meanwhile, in the case of a modeling thesis, the captain's ark can accurately give orders to Wang Xiaodong, who is responsible for programming this link.

As a result, there will be little disagreement among the team members!

Beyond the question dry information, there are three questions:

(1) Determine the position of the near- and far-moon points of the landing preparation trajectory and the size and direction of the corresponding speed of the third moon.

(2) Determine the landing orbit and optimal control strategy for Phase 3.

(3) Perform error analysis and sensitivity analysis for the landing orbit and control strategy you have designed.

“The summary section, which is a summary of the full text, can be completed after the entire article has been written. The focus is on problem analysis after problem restatement, which involves the whole idea of modeling, and the spirit of the entire thesis is here.” Bite the ballpoint pen, knock on the keyboard with the ark fingers, write the outline of the paper, and then start defining the most critical soul for his paper based on a previously calculated draft.

[Question 1. In order to obtain the position of the near- and far-moon points of the landing preparation orbit, and the size and direction of the corresponding speed of the three moons, the first calculation is made using mechanical knowledge combined with known conditions. Using extreme thinking, the movement of the main deceleration stage of No. 3 is divided into infinite uniform straight-line variable speed movements. Iterate the main deceleration stage using the MATLAB software design program...]

[Question 2. In order to ensure the landing trajectory and optimal control strategy for the six phases of the Q3, it is necessary to target the minimum fuel consumption, analyze on this basis, use the parameters obtained in question 1, use the MATLAB software to identify the obstacle in the digital elevation diagram, achieve the identification of the obstacle and the positioning of the landing point, and simulate the optimal landing trajectory by establishing a model…]

[Analyse the error of the landing orbit control strategy designed in question 2. First, list all factors that may lead to the error as much as possible, and analyze it...]

Entry into the state of the ark, the entire body and mind is concentrated on the subject in front of you.

When he finished analyzing the problem, he just felt his brain was incredibly sober, and even the entire thesis had formed a general framework in his mind.

The rest of the job is to translate this outline into a mathematical language...

For most teams, the thesis is usually placed after modeling and programming is complete, but for an ark, the two can be synchronized!

This will be the biggest advantage of their team!