Tip: The following will introduce the 2022 HUAWEI Cup Mathematical Modeling E-question summary and ideas after the competition. Detailed introduction and code matching
Stupid teammate, stupid teammate, stupid teammate must be optimistic about the team formation, this is advice.
Here are a few summaries for description:
First, there must be as many pictures as possible, and as many explanations as possible for the pictures, as well as formulas and tables .
Second, the weight check must be less than 10%, because in addition to Taobao’s weight check, the official website also conducts a self-check.
Third, the abstract is really important, you must organize the language, think more and write it well.
Fourth, speaking is really an art. We did not show badly in the last lesson, and worked hard on the abstract. At first glance, it is a leader, and we really can speak.
Sections of the summary are given below:
Let me briefly talk about my experience. First of all, I found two teammates in the school, one majored in machinery, the other majored in shipbuilding, and I majored in electronic information. In this way, three people formed a team. Because they were all found in the school, no one knew anyone at first. I think one of the kids is good, and he is good at matlab programming. Originally, he didn't participate, but I begged him to stay, and I promised to finish the four model papers for the school competition training by myself, so I dragged him into a thief. Ship, and the other is my former teammate. I sent it in the school group to find someone who can write a thesis, and then came here. I just want to say one thing, this teammate is really too lazy, it doesn't work at all, the whole process is bad, it's really two people's modeling, programming and writing, it's really exhausting.
October 6, 2022:
The three of us met in the classroom for the first time. This competition includes a total of 6 questions, A, B, C, D, E, F. Here I won’t introduce too much about the topic of each question. At that time, because question A was a Huawei question, I drew it for about 10 minutes and looked at it. I gave up decisively. I felt that it was difficult, difficult to do, and too professional. Question B is a cutting question, because I have done PCB board layout and cutting before, which is similar, so I spent 15 minutes looking at it, and I felt inappropriate. Question C is the problem of car scheduling. This is within the scope of my consideration, and it is also a very interesting question. It is estimated that I spent 2 hours looking at this question. The word D is a chip problem. This question looks like a headache, so I give up decisively. Question E is my final choice, and it is also within my initial choice like question C. It is an optimization problem of grassland grazing and riding, and it seems relatively simple. What F is, I forget, there is no choice anyway. Before 11:30 am on the 6th, we conducted research and discussion on C and E, and finally decided on E, because I feel that E is more operable, and the operability here includes more pictures and more data, which is more general, because the topic requires mechanism modeling, which is As long as the requirements are reasonable, the rest are prediction optimization questions, which are very common. Question C is about scheduling, although there are only two questions, but it has too many constraints and too many considerations, but it is very interesting. In fact, I still prefer to do C, but the three of us finally considered the operability of the choice Question E, if you can’t do it, you can make it up (bad smile). From 1:00 p.m. to 11:00 p.m., we analyzed the thinking of 6 questions during the period. The thinking here is only a general idea, and a wide range of literature searches, including HowNet, IEEE, EI, etc., are searched for some keywords. , I searched a lot and read a lot. It is very important to determine the train of thought, and it is necessary to determine the train of thought of all problems as much as possible.
October 7, 2022:
In the morning, we analyzed the first question. Although we have already analyzed it yesterday, we still analyze and check the information, because this question is analyzed and modeled from the perspective of mechanism. The information I was looking for was all documents without formulas. I really searched all over. At that time, I wondered how to do this question. . In the morning, I still looked for literature, and deeply understood the background of this question and the linear relationship between the independent variables. In the afternoon, we thought we should do the second question first. The second question is the prediction question. Isn’t that a good dish? So we used three models including ARIMA time prediction, SVM support vector machine prediction, and polynomial regression prediction. Compare the effect and error, sensitivity analysis, stationarity test and the like. Of course, a lot of pictures were produced, and the paper was written with 10 pages, anyway, there are many. In the evening, the documents for the first question have been found, and basically we know where to start. It is also to start with the actual land evaporation and runoff, including the growth rate, withering rate, and consumption rate of vegetation. This is easy to say, so at night, we basically finished the first question and the second question, but the thesis was not written, so we have to complain about the people who wrote the thesis. I don't want to complain. After the programmer compiled all the second questions, of course I don’t care about this matter. Although I am also a small programmer, I still continue to think about some of my problems, including details. The first question is written in detail. After the books were written, I started to work on the third question. It was around 8 o'clock in the evening. The third question is also prediction and modeling, but the independent variable has changed one, which is a mathematical model of the influence of different grazing intensities on soil chemical properties. I started looking for literature, and I searched a lot during the search, and I also found Question 1 during the search, and I just wanted to add to Question 1. It's time to end at 11 o'clock, and the progress here is still on the third question, staying in the search for literature. Although the idea has come out, for mechanism analysis and modeling, you have to find literature, which is also a technical job. It stands to reason that at the end of two days, you have to finish half of the questions. The fact is so cruel, the third question has not been completely finished, and the paper has not written much, just a few pages. angry! ! ! !
October 8, 2022:
The third question, I have already started to write the thesis, I gave the model I built to the programmer two days ago, and compiled it, the effect is not bad, but it feels like that, I started to write the first question and the second question in the morning I handed some of the conceptual problems of the model to the person who originally wrote the thesis, but he just put it badly, and gave me a green grassland map one day (4 cows, two sheep, two trees, hey, Angry), I started writing, and by the afternoon, I had already found the key paper for the third question, because I didn’t go back to sleep at noon, and it was not too early, and I found it from the soil chemical substance diffusion-dissolution equation and Soil moisture and the influence of land strength on soil moisture will be modeled, and then the influence of soil moisture on the absorption-dissolution rate of chemical substances will be modeled, and the third question will end. The fourth question starts at 4:00 pm. The fourth question is principal component analysis and analytic hierarchy process. Set a constraint condition and a decision variable, and then solve it, and it will be done at night. Then I kept writing papers during the day, the programmers kept programming and drawing pictures, and then the other one continued to suck.
October 9, 2022:
In the morning, we began to think, solve and analyze the fifth question. The fifth question is sustainable development, which is relatively difficult, but we think it is also a dual-objective optimization problem. It also constructs an objective function and performs a series of operations, which will be explained below. finally over. It was already afternoon at the end of this, and we were in a hurry on the sixth question, because the sixth question is prediction plus regression prediction of the model modeled above. I thought it was not good enough, and one of the questions got stuck, and it lasted until late at night, because it was due on the morning of the 10th, checked for plagiarism, and showed it to the teacher, so I worked all night to write the thesis. We are still writing papers late at night, including the adjustment of thinking, which is also a rare process.
October 10, 2022:
At 3 o'clock in the morning, we almost finished writing, and then formatted and organized language re-description. Of course, some of the problems were not done very well, so we are still improving. By 5:00 in the morning, the bad teammates started to work hard, and it took two hours to write the summary. At 8 o'clock in the morning, we checked the weight, then lowered the weight, and then showed the teacher a quick look, then handed it in first, then continued to improve, and finally handed in the paper at 11:55.
1. The first question
提示：这里可以添加本文要记录的大概内容：
Differential equation modeling and solution, no specific statement is given here, only key literature equations are given:
提示：以下是本篇文章正文内容，下面案例可供参考
2. The second question
ARIMA time series, SVM, polynomial regression:
3. Question 3
Here too, only the key equations are given:
4. Question 4
5. Question 5
6. Question 6
代码可以私聊我，等12月结果出来了，发代码
Please pay attention, thank you! ! ! There are still many good-looking pictures about the grassland grazing strategy that have not been released. If you are interested, you can private law, hehe