In those years, we experienced mathematical modeling together.

I still remember that I just entered the university and spent a month getting familiar with the university environment and the schedule of college students.

I remember a month after the new students started school, there was a recruitment activity, and all the clubs in the school gathered here to attract members. I am searching for the club I am interested in among this dazzling array of clubs. At this time, I saw many people wandering in front of a community. Out of curiosity, I went to have a look. It is a new member of the Mathematical Modeling Association. I was thinking at that time that I was not good at math myself, which should have a lot to do with math. There is a sudden impulse to give up.

Just then, a senior came over and gave me a detailed introduction to mathematical modeling training and related competitions. It turns out that mathematical modeling is a group competition, not a human competition, but also the guidance of relevant teachers, so it doesn't matter if you can't. Let's analyze, solve and experience the fun of teamwork.

Encouraged by my seniors, I also like to challenge myself, so I joined the Mathematical Modeling Association. In the association, I keep learning the relevant modeling ideas and algorithms, and exchange feelings and experiences with other friends. Time passed day by day until the arrival of the national mathematical modeling competition. ...

I still remember the day before the national contest of mathematical modeling, the teacher informed us that the players who participated in the contest would come and move the bedstead and bedstead when they had free class time, and make some empty houses next to the computer room for the players to rest, so they wouldn't have to go back to the dormitory at night. On that day, a dozen big boys moved dozens of people's bed boards and bedsteads, very tired, but very happy. Because they encouraged each other and helped each other, I realized the happiness of working hard and harvesting together.

I discussed with two other teammates that you are on duty tonight, I will be on duty tomorrow and he will be on duty the day after tomorrow. On the last night, we will stay up until dawn. So the night before the game, I packed my bags and lay in bed early. I am excited at the thought of starting to fight with my teammates for three days and nights tomorrow. I fell asleep in a daze and woke up at 7 o'clock the next morning. Because I am studying in Xinjiang, it is still dark after 7 o'clock. Wash and pack after getting up, a big mountaineering bag. I know, my first mathematical modeling contest will start there ... At this time, Beijing time is 7: 30 in the morning.

When I arrived at the teaching building, I found my own bed, then put down my luggage and rushed to the computer room to meet my teammates. Everyone seems to be in good spirits. I think they all put their energy into it last night. It's 7: 50 Beijing time. How time flies. I feel like chatting with my teammates for a long time, and time seems to pass quickly. It seems that the game is about to start. I saw everyone sitting in front of the computer, attentively inputting their account numbers and passwords, and downloading test questions. Then the two friends looked at the topic intently. Question A is about the analysis of sunspot shadows, and question B is about the data analysis of Didi taxis. At that time, my teammates and I agreed that question A was too high, and question B was more practical.

So we work together. I look for data such as population density between cities over the years, he looks for relevant mathematical models and algorithms, and the other looks for data on the use and frequency of taxi software. I still remember that it was one morning, and the air conditioner was on in the computer room, but I felt extremely hot inside. Is this mathematical modeling? I struggled with my teammates and instructors in this computer room for three days and nights, and I summarized a paper. That's all?

That whole day, I kept looking for data, visited China HowNet, Wanfang, VIP and other databases, and also went to the National Statistical Network to inquire about relevant information. The final harvest is piles of charts and data analysis data of relevant years and regions. It's really strange that I'm not hungry at this time, but I'm suddenly hungry today. At noon, I wolfed down the lunch ordered by the school and continued to sit in front of the computer until dusk. How time flies! I didn't expect to concentrate on one thing, and I didn't feel that time was passing. Think about always looking at your watch when you are free, maybe it's because you don't have a clear goal!

The first day passed like this, and we solved the first question in question B. I fell down on the bed after returning to the dormitory, so tired! Tired and happy. The first day of mathematical modeling competition-it's over!

The next day, we continued yesterday's momentum and prepared to win the second and third questions in question B, so that our task would be lighter on the third day. However, the weather is unpredictable, and at noon the next day, we met a key problem, which is about data collection and establishing a suitable model. That afternoon, we have been looking for information, and the teacher also helped us make suggestions and put forward some guiding opinions. Until the evening, we are constantly groping, all kinds of databases, China HowNet, countless times to enter, countless times to browse papers. During this period, someone relaxed and turned on the iQiyi player to watch TV series, but under our reminder, his heart was back on track!

The next night, I was on duty. The other two teammates have gone back to the dormitory to rest. I am sitting alone in the computer room with other players, trying to sleep, but I think the game will end one day. The strong pressure kept me awake. If I don't sleep, I can't concentrate. So if you feel tired, go to the bathroom and wash your face with cold water, or take a nap at the computer desk.

In this state, I finally finished the task at 4 am on the third day, lying in my dream bed, waiting for the dawn of the third day, and then I fought with my teammates to complete the final blow to the mathematical modeling competition. So, I fell asleep with a beautiful vision for the future. ...

Woke up on the third day, it was already 8 o'clock, breakfast school was ready, teammates arrived one after another, and sat in the computer room to continue writing papers. We gathered around, had breakfast, and told our teammates about our work and problems this morning. After breakfast, we started the third day of work. Come on! Last day!

After four hours of fighting, the second question of question B has basically ended, the most difficult question has been solved, and the third question is not easy to solve? !

In the afternoon, my tutor came and read the preliminary paper we wrote. I think there is no problem except the sentence and format. Let's perfect the paper and send it to him in the evening. He is responsible for the typesetting of papers and the revision of some sentences. We both reached an agreement, so we began to study the third question in the afternoon and finally compiled a paper.

I don't know if it is because I am too nervous or too excited. I used Lingo software to calculate data optimization for a while, but then I forgot, wrote this, forgot that and changed it four times. It seems that you must not be impatient. The more urgent it is, the more you should keep calm, so that you can get twice the result with half the effort!

In the evening, we basically finished the national paper on mathematical modeling. I took a long breath and sent the paper to my tutor, asking him to hand it in after the final typesetting and revision. A teammate stood in front of the computer with several bags of coffee powder next to it, and then another teammate and I went to the rest room next to take a nap.

I went to the lounge and chatted with my teammates for a while. The more you talk about it, the more excited you are, and you are not sleepy at all. Chatted until 1: 30 in the morning. We talk about life, our feelings, our college ideals, our future, our life ... I feel that I haven't said so much for a long time. Another teammate in front of the computer is still drinking coffee to refresh himself. I heard we didn't sleep.

But I really haven't slept for over ten hours. From 8 am to the next morning 1 o'clock, I suddenly felt very tired. I asked them for leave, went to the lounge to sleep, and told them that if the teacher sent me a message, they must wake me up. So I lay in my dream bed again. I got rid of the tension these days and fell asleep. ...

I don't know how long it took. It feels like ten minutes. One of my teammates came running and told me to wake me up. I asked in a daze, did the teacher send a message? He said no, let me go to the computer room. I said I knew, and then he left. As a result, I fell straight into bed and went back to sleep. I don't know how long it took. I feel that this time I slept a little longer than last time. Wake up by my teammates and let me go to the computer room. I still ask, did the teacher send a message? The result is still the same answer, no.

So I fell unconscious on the bed again. Back and forth, my teammates "tossed" me four times. In the process, I made up for three and a half hours of sleep intermittently. Finally, I felt that being called down by him was not the way. I just sat up, went to the bathroom and washed my face with cold water. I felt a lot of energy in an instant, and then I quickly walked into the computer room. At this time, I looked at the table below. On the fourth day of mathematical modeling, at 6 am, there are still two hours before the end of the game. ...

The teacher still hasn't sent me a message. Bored, I started playing CS, my teammates were watching TV series, and I saw other teams busy writing papers. Suddenly I feel that our team is the most relaxed. Just then, the teacher sent his revised paper.

We were so excited at this time that we downloaded the paper for review instantly. I have to thank the teacher for helping us revise the paper in the middle of the night. It's really hard! The typesetting of the paper is much better than before, and the sentences that are not fluent are also revised rigorously and professionally. We looked at it and thought it was not a big problem. We are going to hand in the papers before 8 am. At this time, the time is 7: 00 in the morning, and there is still 1 hour before the end of the national mathematical modeling competition …

Time passed quickly. At 7: 40, everyone opened the website link to submit their papers. But I didn't expect too many people to log in and the website card exploded, so we printed the paper version first. Because there are many teams to print, the scene is chaotic, and everyone sees busy scenes, plus they don't have a good rest, they will be in a very bad mood and easily lose their temper, so I'm sorry that I didn't control my emotions and get angry with my teammates at that time. Afterwards, it was my own fault, so after the electronic and paper versions of the paper were submitted, a big boy was easy to talk, waved his hand and said nothing! After the international competition, we packed our bags and prepared to go to the dormitory. At this point, we read the table below. At 9: 30 Beijing time, Monday is the first day of class every week.

We walked out of the computer room, carrying my huge mountaineering bag, and our teammates put on bedding and sheets with big bags and small bags, and walked towards the dormitory together. When I saw my friends on the road, they all said to me, "Are you going through the customs? It's not easy! " I just laughed, because I really didn't have much strength to say hello to them, and even found it difficult to speak. In these three days, we have experienced the process of never attending meetings together, and we feel the fun of learning and using now!

Of course, what impressed me most was the support and care of my teammates, the warmth of mutual encouragement and support when I was too tired to open my eyes. The scene of three people sitting side by side in front of the computer; The pleasure of chatting and entertaining together at dinner time; There is also a learning atmosphere where everyone can discuss and share ideas when problems arise; Of course, there are tutors who pay silently for us; I think winning the prize in the mathematical modeling competition is only the second. The key point is that during these three days and nights, I realized the importance of teamwork and cultivated my current ability of independent thinking, data analysis and learning. Finally, I want to be lazy but dare not to be lazy under that kind of strong pressure, and constantly stimulate my potential, because I have never tried what it feels like to stay awake for a day and a night, or the powerful spiritual strength to work for a day after a short rest.

Yes, I have experienced all these, and I have experienced them. Therefore, this national contest of mathematical modeling is a contest that I will always remember with my heart, not only because it is my first time to participate in a national contest, but also because I have gained other wealth besides winning the prize in this contest, which materials can't buy.

Three people came to the intersection of the dormitory. It's time to say goodbye I waved and said, "Goodbye, go back to rest early ~". Thank you for collecting a beautiful picture in my memory. Even after many years, I still believe that whenever I recall this experience, it is a valuable asset to me, and I will use it to lead a better life, because I find that I have achieved others.

Back in the dormitory, all my roommates went to class. In the empty dormitory, I unloaded all my luggage and tired body, mechanically walked to the bed, lay on the bed, looked at the ceiling and slowly closed my eyes. This will be the best sleep I have ever had. Tomorrow, will be a brand-new day, I will strut in the crowd, because I am not the old me, I have a new life.