Originally, the College Cup National Modeling Competition was supposed to be held last month, but for some unknown reason, it was postponed until now.
October 27th.
At this time, the weather in Tangdu has brought a hint of air-conditioning, and the national modeling competition has officially begun.
One day in advance, Wang Donglai, Liao Qingfeng and other participants in the modeling competition arrived at another campus and moved into a place specially arranged by the school.
After all, this competition is also a grand event, and it is also the best opportunity for each school to prove itself.
At seven o'clock, most of the contestants entered the dedicated computer room and sat down quietly waiting for the game to start.
The students who can sit here are all students who have a certain degree of confidence in themselves, with obvious eagerness to try on their faces, and a hint of ambition in their eyes.
Tangdu Jiaotong University has a total of 76 teams and more than 200 people participating in this modeling competition.
More than 60,000 college students from 21,303 teams from various provinces, cities, districts (including two special zones), Singapore and 1,284 universities in Bald Eagle participated in this modeling competition.
This competition is jointly organized by the Department of Higher Education of the Ministry of Education and the Society of Industrial and Applied Mathematics, and is full of gold.
Seeing that the time was getting closer to eight o'clock, the atmosphere in the entire computer room became tense. Many students were obviously participating for the first time. After the initial excitement and excitement passed, they became a little silent.
The time is up and the competition begins.
In an instant, everyone quickly entered the official website and started downloading the questions.
A quick search on the Internet will reveal the rules of the Mathematical Modeling Competition. There are two questions for the undergraduate group and two questions for the junior college group. The participating teams only need to choose one question and complete modeling, programming, and... For the corresponding paper, just convert the format and upload it.
The process is actually very simple, and the questions inside are rare.
You can search for information online. It may seem like an open-book exam, but in fact you can't find the corresponding questions or shortcuts to solve the problems online.
After all, every year's modeling competition test questions are questions that the question makers have racked their brains to come up with, or they are problems encountered in corporate development, which have been slightly improved, packaged into test questions, and presented.
Time is of the essence. After all, the total assessment time is only 72 hours. Saving some in other places will give you more time to think.
However, when they saw this year's test questions, Liao Qingfeng and Ye Fei frowned severely.
Question A: Evaluation of wine
Question B: Design of Solar House
Question C: Analysis and intervention of environmental factors in the incidence of stroke
Question D: Robot obstacle avoidance problem
Judging from the questions, I feel that the CD questions appear to be more modern and high-tech, while the AB questions look like junior college questions without any technical content.
After all, one is about robots and analyzing serious diseases in medicine, and the other is about wine evaluation and designing solar huts.
If you have never had any contact with it, no matter how you look at it, you will think that the former should be an undergraduate degree, while the latter is a junior college degree.
In fact, quite the opposite!
AB questions are for undergraduate students, and CD questions are for junior college students.
“What’s so good about wine? Isn’t it the 1982 Lafite that’s the best?”
“Romanee-Conti’s red wine is also good, but what does this have to do with modeling?”
"The questions are really getting weirder and weirder. Which big shot came up with this weird question this year?"
“The test questions of the specialist group feel more challenging than ours!”
For a moment, many people complained in the computer room.
Although the modeling test questions are different every year and there is no rule, many people still complain in frustration when they see these questions.
Some people are complaining after seeing such questions, and naturally there are also people who are carefully analyzing and choosing test questions.
"Which question do we choose?"
Ye Fei looked at Wang Donglai curiously and asked.
Liao Qingfeng is also thinking now, analyzing the test points of the two questions, trying to find a test question suitable for three people.
“We choose solar cabins!”
At this time, Wang Donglai spoke directly to the two of them.
Noticing the questioning looks in their eyes, Wang Donglai explained a little: "The wine evaluation question seems simple, but in fact, as long as you think about it carefully, many people can still do it. Those who choose this question will be able to do it." Definitely not less.”
"We choose question B. There may be relatively fewer people, and this question is not too difficult."
"For the first question, directly use the Excel table to directly sort the climate and radiation intensity given in the question, then establish a nonlinear programming model, and use visual C++ programming to calculate the results using a certain model on each surface. Then a mathematical model of the solar photovoltaic array is established, and the photovoltaic arrays on each side of the house are obtained based on the volt-ampere curve, combined with the solar radiation intensity, light incident angle, environment, geographical dimensions of the building, regional climate and meteorological conditions, etc. Data are used to model nonlinear equations.”
"In this way, we can get the photovoltaic cell laying plan of the hut and the total power generation of the hut in 35 years is 1999760kwh, the economic benefit is 273.83%, and the investment recovery period is 12 years and 10 months..."
"In response to the second question, first based on the continuity, uniformity, maximum and other related properties of the sun to the ground, we established the optimal inclination model under an independent photovoltaic system. The optimal inclination angle was 35.1°, and then combined with question 1 As a result, the photovoltaic cell laying plan of the hut and the total power generation of the hut in 35 years are 2225216kwh, the economic benefit is 304.70%, and the investment payback period is 11 years and 6 months."
"As for question three, it is even simpler. First, establish a nonlinear programming model, and use visual C++ programming to obtain relevant data such as the length, width, and height of the cabin. Combined with question one, we obtain the photovoltaic array structure of the cabin, and finally calculate the power generation of the cabin in 35 years. The total capacity is 1,374,539kwh, the economic benefit is 34.14%, and the investment recovery period is 10 years and 3 months."
While talking, Wang Donglai also wrote these key figures on the paper.
Ye Fei and Liao Qingfeng looked confused, staring at Wang Donglai with big eyes and small eyes, like idiots.
Someone actually dictated the answers to the modeling competition questions.
The two of them claimed to be top academics in their respective majors, but they really couldn't figure out the answer mentally in such a short time like Wang Donglai.
For a moment, the two of them couldn't help but feel astonished.
"No, Donglai, did you calculate it in your head?"
Ye Fei was stunned and asked Wang Donglai with a look of shock on his face.
"It's just mental arithmetic. It's very simple. Can't you guys do it?"
Wang Donglai suddenly had a bad taste, pretending to take it for granted, and asked in confusion.
"Well, I can do mental arithmetic too, just a little slower, not as fast as you."
Ye Fei was stunned for a moment, then explained aloud, trying to save his dignity.
Liao Qingfeng looked on, feeling quite confused for a while.
With the answers given by Wang Donglai, the difficulty of this modeling competition instantly dropped. With complete ideas and detailed data, as long as you follow the steps step by step, you can complete it.
"As I said before, Liao Qingfeng, you do the modeling, and Ye Fei, you do the programming. Just follow what I said, it's not difficult to solve the problem."
"Of course, if you two have any good ideas, you can put them forward and we can discuss them."
With that said, Wang Donglai looked at the two of them, waiting for their answers.
"No need, I believe you!"
Ye Fei did not hesitate and immediately said that he had no problem.
Liao Qingfeng hesitated for a moment before saying, "I don't have a problem either."
"Well, let's get to work!"
"You don't have to stay up late, and you don't have to worry about your liver. Just do it at a normal speed."
When Wang Donglai said this, he couldn't help but marvel at the power of [mental arithmetic].
[Mental arithmetic: Addition, subtraction, multiplication and division of numbers will no longer cause any trouble to you. No matter how complicated the numbers are, they will not stump you. 】
This ability plays a huge role in being able to answer test questions quickly.
Of course, it's not just this ability.
The improved subject of [Mathematics], as well as the increased attributes such as wisdom, all armed Wang Donglai, so he was able to solve this problem in a very short time.
This question requires more calculations, requires more flexibility in thinking, and requires a more solid grasp of knowledge points. As long as you can change your thinking, it is not difficult to solve it.
