Chapter 369 Brother Yang, please fulfill your promise of military training early morning. Xu Qingzhou and Song Yao had been busy for several days. They finally got a break and slept until 10 o'clock. After having a quick lunch at noon, Song Yao changed her clothes and prepared to go out before 1 o'clock. After two days of rest, she made an appointment to go shopping with Ding Jiahui. It's still a sister bureau. Guo Ziyang is busy working on a new project. Xu Qingzhou also had some free time and prepared to catch up on his sleep. "I'm going out, do you want to buy anything?" "No." Xu Qingzhou was lying on the sofa with his arms and legs spread out. After finishing his meal, he started to feel sleepy after sitting for a while. "Cover yourself with the blanket, don't catch a cold."
Song Yao reminded. "Okay." Xu Qingzhou pulled one side of the blanket over himself. On this side, the second cat jumped off the radiator, stretched, and meowed towards Xu Qingzhou, nimbly crawled under the blanket and exposed its head. Song Yao changed her shoes and looked at the two "useless people" (one big and one small) with squinting eyes in the living room. She shook her head, wondering what would happen to them without her. The entrance of the shopping mall. Ding Jiahui waved her hand, and when Song Yao came over, she immediately took Song Yao's hand and suggested, "Let's go shopping for a while, and buy a cup of milk tea when we get tired." "okay." The two of them strolled around the mall and soon walked into a knitwear store. "I want to buy a pair of gloves for Xu Qingzhou." Ding Jiahui looked at Song Yao who was concentrating on picking gloves, "Yaoyao, I found that you have really changed." "Huh?" Song Yao turned her head in confusion. Ding Jiahui touched her chin and commented: "The wife's temperament is getting more and more complete." "." "If it was three years ago, I would never have thought that Yaoyao, who has a cold personality, would actually choose things for a man." “I can’t imagine that either.” Song Yao pursed her lips, thinking of her past self, and then thinking of the present, the corners of her mouth curved up. Ding Jiahui giggled and took Song Yao's arm. "But I like you right now. People should smile more, especially you. When you smile, even my heart is moved. Hehe, how about considering that we can be a couple?" "You don't want Guo Ziyang anymore?" "That's easy. Let him and Xu Qingzhou be a pair."
"." Yandong Garden. Ahhh~ Xu Qingzhou touched his nose, looking strange: "The heating at home is quite sufficient, but why does it feel a little cold?" After walking around for half a day, the two girls sat down in a milk tea shop. "Time flies by so fast. It feels like we just graduated from high school and we're almost done with college." Ding Jiahui rested her chin on her hand and sighed, "I originally wanted to learn from you, but after thinking about it, I decided not to. Every family has its own problems, and so do couples. Our situation is different." "You can also talk about it." "How does that saying go? Oh, a man stays young until he dies. Guo Ziyang is like that. Sometimes he is so childish that he always makes people angry." "Your Xu Qingzhou is quite mature, not like Guo Ziyang." "right." Song Yao felt a little lacking in confidence. Xu Qingzhou is also very childish. He likes to commit suicide for no reason. Humph, he even said that she has an idol burden, but it is obviously this guy who is the one. He looks serious in the eyes of others, but he is a pervert. Ding Jiahui bit the straw, thought about it, and then burst out laughing again. "Maybe this is why I like him, he's silly. When he first pursued me, it was raining and he ran to buy an umbrella in the rain. He was soaked like a drowned rat. But, I think he's so handsome." "I suspect you are here to show off your affection to me." Song Yao said. "Ahem~ I can't help it. Of course I have to praise my boyfriend a lot." Ding Jiahui lowered her voice, looked around, and when she was far away from the crowd, she said, "Also, I found that Guo Ziyang has a perverted hobby." Song Yao froze while drinking milk tea. She was very sensitive to the word "pervert": "What's wrong with him?" "He seems to like my hand very much," Ding Jiahui spread her fingers and looked at the sunlight. "It is indeed very beautiful, but it still looks a bit abnormal." "well enough" Song Yao glanced away and felt even more guilty. Is it abnormal to like hands? Xu Qingzhou not only likes hands, but also feet, and all kinds of strange Compared to this, there is absolutely no hope. As for her. When the two of them are on the sofa, she always likes to put her feet in Xu Qingzhou's arms. So perverted. dying. It must have been influenced by Xu Qingzhou. In other words, I've been fooled by this guy again and am being boiled like a frog in warm water.
First, I trick myself into living together, then I move to the sofa, and then to the bathroom. This guy Xu Qingzhou had woven a big net, and that's how she fell into the trap. "Haha, it's just talk, no problem." Ding Jiahui came back to the point by herself, laughing: "It's normal for my boyfriend to like me, want to be close to me, and hold my hand. Hey~ Yaoyao, what's wrong with you?" "nothing." Song Yao shook her head and became angrier the more she thought about it. So, in the evening, Xu Qingzhou, who was lying on the sofa leisurely reading a book, was pulled over by Song Yao and beaten up. It was mid-December and the sun was out, but there was still a slight chill in the air. Xu Qingzhou and Song Yao had just separated and were on their way to the library when they received a call from Ji Yunshi. Ji Yunshi's full-throated voice came from the phone: "Xu Qingzhou, it's almost 17. The budget of the institute is sufficient. Do you have any projects you want to apply for?" "At the moment, I have no other ideas." Xu Qingzhou said helplessly. "It's okay, it's okay. If you have any ideas, just come to me. Funding and experimental equipment are not a problem." "Okay, thank you, Director." Xu Qingzhou thanked him. The two exchanged a few brief pleasantries and hung up the phone. Xu Qingzhou smiled again. Old Ji was still as enthusiastic as before, but there was no need to rush. Physics would definitely be one of his main areas of focus in the future and there would be many opportunities in the future. He went straight to the library and found an empty seat. He took out the calculation manuscript of the local smoothness conjecture and worked hard on it for two days. The second solution still could not solve it, so he decided to take one last look at it. At the same time, Ji Yunshi hung up the phone and just arrived at the entrance of the physics school, he met an acquaintance. The middle-aged man greeted: "Director Ji, it's quite early today." "Old Guan, good morning, come over early to sort out some documents." "The weather is getting colder. I feel it's colder than last year." "Yes, it was better last year." After chatting for a while, Professor Guan got down to business: "Old Ji, what about my student's project?" "Old Guan, please wait a little longer. The budget for the new year has not yet been finalized." Ji Yunshi said with a smile. "You just said that the hospital has sufficient budget?" "Have it?" Ji Yunshi showed an expression of serious recollection, and then said: "You mentioned the phone call I had with Xu Qingzhou just now. I said this on purpose to retain talents for our School of Physics. In this way, if there is more funding later, I will definitely help you."
After much persuasion, Ji Yunshi finally got rid of Professor Guan and sighed inwardly: Old Guan, don’t you know the level of your student? All the funds have been spent, but the results? Hi, zero. I can't give you any funding at all. 8: in the morning. In the office of the School of Economics, Li Daiyue was checking the work progress with Professor Ke Chen. Li Daiyue stared at the progress chart and said in a deep voice: "Well, if nothing unexpected happens, the project can be completed in January." "Yes, it's worth it for everyone to work day and night to catch up with the progress during this period." Professor Ke Chen also said. "What about the autoregressive integrated moving average model?" "I just discussed this with Xu Qingzhou yesterday, and he said he was confident that the error could be controlled within ." Professor Ke Chen said with a smile. "This kid is quite confident." Li Daiyue certainly did not question Xu Qingzhou's mathematical level. Anyone who can solve several world-class mathematical problems is definitely a genius among millions. But everyone has their own expertise, and this must be Xu Qingzhou's first time participating in an economic project. Moreover, many top teams have worked together to come up with models with this value, but Xu Qingzhou is just one person. Professor Ke Chen smiled and said, "Let's just wait and see. He said that we can see the complete model within a week." Li Daiyue nodded slightly. The error was only a relatively perfect state. A higher value is acceptable. Li Daiyue considered the problem very comprehensively, and even thought of what to do if Xu Qingzhou's final model was not up to standard. Xiaoyao's boyfriend is also half of his apprentice. If there is really a problem, he can just save his face and ask Professor Wang, who is busy, to fix it. Not a big deal. library. Xu Qingzhou sighed helplessly, took out a brand new manuscript, and planned to try the third calculation method. Because the support of function R with respect to variable ε is contained in λ, and the phase function satisfies the non-degenerate property. Therefore, it can be deduced here that for a fixed , there are at most ≈λ^ε isomorphic sets that intersect with it. The third option had been brewing in Xu Qingzhou's mind for a long time, so he started writing directly. Therefore, if we start over, we need to return to the proof of (), that is, in the sense of a negligible difference, we only need to prove the following inequality. Xu Qingzhou narrowed his eyes, looked at one of the manuscripts, and circled the inequality inside with a pen. like There is something to it. Xu Qingzhou was not excited. Just like the previous two plans, he also thought they had great prospects at the beginning, but they all hit a dead end halfway through. School of Mathematics.
"Aren't you in charge of the IMO command, old man? How do you have time to come to me?" Chu Jiangfeng said with a smile. "You're asking even though you already know the answer." Gu Zhizhong sat down unhappily. Seeing Chu Jiangfeng getting up to make tea, he asked again, "The tea you made last time." "Okay, if someone else comes, I might say we're out of stock, but as for you, hey, you can have as much as you want." Chu Jiangfeng took out the small jar of tea from the inner part of the cabinet. "Are you here to learn about Xiao Xu's situation? Don't worry, he's fine. It's just that he's gone to help Li Daiyue now." "This boy" Gu Zhizhong was slightly surprised, but didn't say anything. It was reasonable for Xu Qingzhou to help his girlfriend's teacher. "How is his math going?" "Not smooth." At this time, the office was filled with the aroma of tea. Gu Zhizhong said, "It's already December. I know you've always supported him in exploring different fields, but he's going to graduate next year and be sent on a government scholarship. Don't just stick to one thing and write a graduation thesis quickly. You know, young people tend to get stuck in a rut." "Why don't you say it yourself?" "You are a student." "He's also your student." "." The two looked at each other and laughed happily again, their faces full of relief. There was no need to fight for the common student. Gu Zhizhong took a sip of tea and said with a smile: "Actually, this kid knows what's going on. We don't need to worry too much." "That's right. Even though this kid is only 20 years old, his mentality is comparable to that of us old guys." As he was speaking, Chu Jiangfeng frowned and came to his senses a little: "You old man, you are not worried at all, you just come here to cheat for tea, right?" "Ahem~drink tea, drink tea." In the morning, Xu Qingzhou was doing calculations on the local smoothness conjecture, which was quite smooth. When it was time for lunch, Xu Zhengyang and the other three happened to be there too, so they simply made an appointment to have lunch together. Farm. Xu Qingzhou looked at Xu Zhengyang across from him, "Old Xu, Chen Shiqi isn't here, why are you coming to the library?" Xu Zhengyang’s girlfriend is a senior this year and has already gone out for an internship. "Hehe, you make it sound like I'm really scared of my girlfriend." Xu Zhengyang said proudly. "It's mainly because I'm bored. Everyone around me is working so hard. You know, I sleep so well every day, and suddenly I hear them getting up and washing up. Damn, I can't sleep at all." Xu Zhengyang accused Kong Xianbo and Zhai Ziqiang of crimes.
After the breakup, Kong Xianbo seemed to have returned to his former self as the arrogant academic master he once was. He adjusted his glasses and said, "Old Xu, depravity is the original sin. Let's study together. Only knowledge can create the future." Xu Qingzhou was eating rice, and seeing Xu Zhengyang was also anxious, he asked, "Your courtyard can't make you feel safe?" "We are respectable people and don't rely on our family. But how do you know that my family bought another courtyard house this year?" "." Library lobby. "I finally got to show off in front of Lao Xu." Looking at Xu Qingzhou's departing back, Xu Zhengyang shook his head and sighed, "Hey, Lao Kong, Lao Zhai, you look so gloomy, do you want to see photos of my courtyard house?" Kong Xianbo patted Xu Zhengyang on the shoulder, forced a death smile on his face, and said, "Old Xu, you have to be thankful that this is a library." "Brother Yang, congratulations, you now have a new courtyard house." "Old Zhai, a true brother." "Brother Yang, I remember you and Brother Zhou made a bet during military training. How about making it happen today? Don't worry, I don't have diarrhea." "." Sitting down, Xu Qingzhou took out his cell phone and chatted with his girlfriend first, asking her if she had finished her meal. At 3 pm, he received another call from Professor Zhao Shengwen, saying that the completion application for the battery project had been approved, and that a simple dinner would be held on Friday evening, the 23rd, and Xu Qingzhou was invited to join. Xu Qingzhou readily agreed, just in time to thank Professor Zhao for the information. In addition to talking about the dinner, he also talked about the paper about the model he established. Xu Qingzhou himself served as the first author, but Wang Wei, Hong Yayu and Gong Yunfei were also involved as the second author. Xu Qingzhou had no objection. He was just making a model, and the data were produced by Professor Zhao Shengwen's research team. For Xu Qingzhou, the autoregressive integrated moving average model is quite time-consuming but not very difficult. He has used the ARIMA model to model the GDP data of the past five years and found that the model's goodness of fit R reached 5, which fully met the experimental requirements. Identify outliers and minimize their impact through smoothing. ARIMA(p，d，q)模型的数学公式：(1-φ1B-φ2B^21+θ1B+θ2B^2++θqB^q)ε_t “ error.” Xu Qingzhou shook his head. "Professor Ke Chen's requirements are a little low." Researchers are usually not satisfied until their theories score 100 points. Sometimes, Xu Qingzhou also has this stubbornness. Therefore, in the process of modeling, in addition to writing the model according to the basic pattern, some interesting things are appropriately added. He constructed an algebraic equation about the model parameters through the maximum likelihood estimation (MLE) method, and then obtained the estimated values of the model parameters by solving this equation. Trigonometric functions are used to describe the cyclical variation characteristics of seasonal time series data, and are incorporated into the ARIMA model for fitting and prediction. In addition, the autocorrelation function (ACF) graph and partial autocorrelation function (PACF) graph in geometric figures and the inversion of linear algebraic matrices are also used.
Fix bugs and reduce error values. This model will be terribly powerful. (End of this chapter)