Chapter 350 You are tinkering with something new again laboratory. Xu Qingzhou turned on the equipment, checked the operation status of each device on the observation screen, then sat down, took out a manuscript paper, and continued to study the IPC problem. In fact, if you follow the rules and build the model in the usual way, this week is enough. But after careful consideration, Xu Qingzhou decided to optimize the IPC model. Now that we have decided to do research, of course we have to come up with something new. He currently has two ideas. First, try to design a more reasonable barrier function shape, or adjust the parameters of the barrier function, such as customizing the parameter d and the exponent of (d-d_hat), to further improve the simulation accuracy and efficiency. Second, we try to introduce parallel computing and asynchronous processing technology to decompose computing tasks into multiple processors for parallel execution to improve computing efficiency. As usual, except for going to eat lunch at noon, Xu Qingzhou stayed in the laboratory during the day. In the afternoon, an acquaintance came to the laboratory, Academician Chu Jiangfeng. "Professor Chu."
Xu Qingzhou smiled and led the old man into the laboratory. "Is everything going well?" Chu Jiangfeng asked with a smile. Although he couldn't help much in physics, he should still come and take a look at the experiments led by his students. "Going well." Xu Qingzhou nodded. Chu Jiangfeng nodded, looked around the laboratory, and was immediately impressed that he was already in charge of a laboratory at such a young age. At this moment, he looked down at the manuscript paper on the table and was stunned. Distance functions and barrier functions. What is this? Is there such a thing in physics? "This is the IPC in the field of computational mathematics?" Chu Jiangfeng had a wide range of interests, and after a little thought, he recalled what was on the manuscript paper. "Have you also studied this?" Xu Qingzhou was a little impressed by Academician Chu's broad knowledge. Chu Jiangfeng shook his head slightly and said, "Professor Wang from the School of Computer Science at Peking University is working on a project on elastic body contact simulation. He invited me to help with the mathematical modeling, but I can't leave here." "How did you get into this?" Seeing Chu Jiangfeng's strange expression, Xu Qingzhou explained, "A friend of mine is working on a project on elastic contact simulation and asked me to help solve the IPC model." Chu Jiangfeng shook his head. This kid, it’s only been a short time and he has already started a new research field. He is picking hard nuts to crack. As far as he knows, IPC is very difficult, otherwise the School of Computer Science would not have asked him for help. Never mind, young man, you need to temper yourself. Chu Jiangfeng stayed in the laboratory for about ten minutes. Seeing that everything was in order, he felt relieved and left slowly. 5 month 25 day. In the laboratory, Xu Qingzhou was calculating with his head down, and his desk was covered with sheets of complicated calculation papers. During this period, in addition to collecting experimental data, he was working on Guo Ziyang's model. After several days of hard work, the results were pretty good. According to his estimation, the computing efficiency could be improved by nearly 50 times compared to the previous IPC.
The entire barrier-based augmented Lagrangian iterative model uses preconditioned conjugate gradient (PCG) instead of the direct method to solve the sublinear system. At the same time, the storage method of ultra-large-scale sparse matrices has been innovated, skipping the calculation of the sparse matrix pattern and completely omitting this step while ensuring sparse storage. University of International Business and Economics. Seeing Guo Ziyang coming back from the phone call, Qi Lan asked, "Senior, when will the IPC model be ready?" "It's coming soon." Sun Qifeng, a new student who joined the project, said: "Without the IPC model, we can't do the next work." The other girl also nodded. "This is not a problem." Guo Ziyang shook his head and said, "I reviewed the work of the past few days last night and found a lot of problems. Before the IPC comes out, let's solve these small problems first." "Ah? There is a problem, but I think it's already pretty good." Sun Qifeng scratched his head. "It still doesn't work. For example, some of the code in the third part is too complicated, which affects the calculation speed." Guo Ziyang roughly answered several questions, "I know that the framework we have built now can generally meet the needs of the project, but since we have already done it, why don't we choose to keep improving it." "Okay, everyone go back and change it." A familiar figure walked into the classroom. "Zi Yang, I'm busy." Xing Yunyi walked in with a smile. "Yeah, I just finished it." "Zi Yang, this project is not realistic. Why don't you just come to my side? I'm working on parallel computing. If nothing goes wrong, once you produce the results of the first phase, it can become a key project in the institute." "No need." Guo Ziyang shook his head, knowing that this guy was here to show off. He is still as stubborn as ever. Xing Yunyi was not surprised. He just visited Guo Ziyang and the others and left with a smile. Guo Ziyang withdrew his gaze from Xing Yunyi and said, "You guys watch first, I'll go to Lao Zhang's place." "Is Teacher Zhang back?" Zhang Rongxuan, a professor in the computer department and Guo Ziyang's programming teacher, was very kind to Guo Ziyang, so he had been paying attention to this project and went abroad for exchange one month later. Guo Ziyang said helplessly: "Well, I just came back yesterday and I'm jet lagged. They called me this morning to report the situation." office. The old professor, who was losing some hair, looked stunned and asked, "Two of them ran away?" Guo Ziyang nodded and said, "I felt there was no point, so I gave up." "IPC is really troublesome. Didn't you say everything was going smoothly? Why didn't you tell me if you encountered any problems?" Zhang Rongxuan scolded him unhappily, thought for a while, and said in a deep voice: "How about this, I'll go to the Mathematics Department and borrow someone to help you." He was quite optimistic about Guo Ziyang. Although this kid didn't look very smart, he was determined and responsible.
"Professor, we have found the right person." Guo Ziyang said embarrassedly. "found it?" "Yeah, a good friend of mine from high school." Hearing this, Zhang Rongxuan couldn't help but chuckle. These young people really didn't have much experience. "Xiao Guo, IPC is not easy. Most people can't handle it. You should listen to me and go to the School of Mathematics to find someone." Hey~ Guo Ziyang's cell phone rang with a call alert. He didn't want to answer it at first, but when he saw that it was Xu Qingzhou calling, he was suddenly shocked and swallowed what he was about to say. "Professor, this is my friend's phone number." Zhang Rongxuan waved his hand: "Take it first." "Zhou Zi, what's the situation?" Guo Ziyang couldn't wait to ask, Xu Qingzhou said a few days ago that he would be well soon. "Fatty, you'd better be mentally prepared." Xu Qingzhou's voice came from the phone. Guo Ziyang's heart skipped a beat. "I have tried my best. It is far from the standards you gave me at the beginning. It can even be said to be completely different." "what?" Guo Ziyang was stunned. "Completely different from the standard?" There were only two people in the office. Zhang Rongxuan could vaguely hear some of the content and thought to himself, "It is true. This thing can't be made by just anyone. It's not like a child playing house. I can't ask my friends to come." "Yes, the model has been sent to you, please take a look at it yourself." "Oh, okay, okay." Guo Ziyang put down his phone, still not calming down. Xu Qingzhou was so amazing, but he couldn't handle it? "Xiao Guo?" Guo Ziyang came back to his senses, looked at Zhang Rongxuan, and sighed, "My friend seems to have failed." That's not right. This guy had promised him a few days ago that there would be absolutely no problem. No, I must give him a good beating next time we meet! "It's okay, it's always like this when I do a project for the first time." After Zhang Rongxuan finished comforting her, he continued, "Professional matters should be handled by professionals. Don't be discouraged. I'll go to the School of Mathematics to ask." “He’s quite professional.” Guo Ziyang added weakly, paused, and then excused his friend, "Maybe this model is not his area of expertise." Hey~ As he was speaking, he discovered that Xu Qingzhou had already packed the model and sent it over. “He sent the model over.” Zhang Rongxuan smiled and said, "Let's see how far your friend's model has come." Guo Ziyang turned on the computer and opened the email sent by Xu Qingzhou.
(End of this chapter)