Chapter 350

Laboratory.

Xu Qingzhou turned on the equipment, checked the operation of each piece of equipment on the observation screen, sat down on the side, took out draft paper, and continued to study the IPC problem.

In fact, if he followed the rules and established the model according to the usual method, this week would have been enough.

But after consideration, Xu Qingzhou planned to optimize the IPC model.

Since he had decided to study it, he naturally had 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 the custom parameter d and the exponent of (d-d_hat), etc., to further improve simulation accuracy and efficiency.

Second, try to introduce parallel computing and asynchronous processing technology to decompose computing tasks to multiple processors for parallel execution to improve computing efficiency.

As usual, except for going out to eat 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 gentleman into the laboratory.

"Is it going smoothly?"

Chu Jiangfeng asked with a smile. Although he couldn't help much in physics, he should still come to see the experiment led by his student.

"Smoothly." Xu Qingzhou nodded.

Chu Jiangfeng nodded, looking at the laboratory, and suddenly felt emotional. He was already in control of a laboratory at such a young age.

At this time, he looked down at the draft paper on the table and couldn't help but be stunned.

Distance function and barrier function...

What kind of thing is this? Is there this thing in physics?

"This is... IPC in the field of computational mathematics?"

Chu Jiangfeng has a wide range of interests. After thinking slightly, he recalled what the content on the draft paper was.

"Have you also studied it?" Xu Qingzhou was a bit impressed by Academician Chu's extensive knowledge.

Chu Jiangfeng shook his head slightly and said: "Professor Wang from the School of Computer Science at Jingda is doing a project on elastic contact simulation. He invited me to help make a mathematical model at the beginning, but I couldn't get away."

"How did you get involved in this thing?"

Seeing Chu Jiangfeng's strange expression, Xu Qingzhou explained: "A friend of mine is doing a project on elastic contact simulation and asked me to help solve the IPC model."

Chu Jiangfeng shook his head. This kid, how long has it been, and he started a new research field again, and he specifically chose the hard bones to chew. As far as he knows, IPC is very difficult, otherwise the School of Computer Science wouldn't have asked him for help.

Forget it, forget it, young people need to be tempered.

Chu Jiangfeng stayed in the laboratory for ten minutes. Seeing that everything was in good order, he felt relieved and left slowly.

May 25th.

Laboratory, Xu Qingzhou was lowering his head to calculate, and the table was already covered with complex calculation draft papers.

During this period, besides collecting experimental data, he was working on Guo Ziyang's model.

After several days of hard work, the results were quite good. According to his estimation, compared to the previous IPC, it could improve computing efficiency by nearly 50 times.

The entire barrier-based augmented Lagrangian iteration model used preconditioned conjugate gradient (PCG) instead of direct methods to solve sub-linear systems.

At the same time, the storage method for ultra-large-scale sparse matrices was innovated, skipping the calculation of the sparse matrix pattern, and completely omitting this step on the basis of ensuring sparse storage.

University of International Business and Economics.

Seeing Guo Ziyang come back after finishing the call, Qi Lan asked: "Senior, when will the IPC model be ready?"

"Soon, soon."

Sun Qifeng, a boy who just joined the project, said: "Without the IPC model, we can't do our subsequent work."

The other girl also nodded.

"That's not a problem."

Guo Ziyang shook his head and said: "Last night, I sorted out the work of these few days and found many problems. Before IPC comes out, let's solve these small problems first."

"Ah? There are problems, but I think it's already quite good." Sun Qifeng scratched his head.

"It's still not good. For example, in your code for the third part, a few sections are written too complexly, affecting the calculation speed."

Guo Ziyang roughly finished saying a few problems, "I know, the framework we have built can generally meet the project needs, but since we have already done it, why don't we choose to strive for excellence."

"Alright, everyone go back and change it."

A familiar figure walked into the classroom.

"Ziyang, busy?" Xing Yunyi walked in with a smile.

"Yeah, just finished." "Ziyang, this project is unrealistic. Why don't you just come over to my side? It's about parallel computing. If there are no accidents, after we produce the results of the first stage, it can become a key project of the institute."

"No need." Guo Ziyang shook his head, understanding that this guy was here to show off.

Still as stubborn as ever. Xing Yunyi was not surprised. After visiting Guo Ziyang and the others, he also walked away with a smile.

Guo Ziyang withdrew his gaze from Xing Yunyi and said: "You guys watch first, I'll go to Old Zhang's side."

"Teacher Zhang is back?"

Zhang Rongxuan, a professor in the Computer Science Department, is also Guo Ziyang's programming teacher. He is very good to Guo Ziyang, so he has been paying attention to this project. He went abroad for exchanges for 1 month.

Guo Ziyang said helplessly: "Yeah, he just came back yesterday and is suffering from jet lag. He called me this morning to ask me to report the situation."

Office.

The old professor, who was a bit balding, had a stunned expression, "Two ran away?"

Guo Ziyang nodded and said: "They felt there was nothing to do, so they gave up."

In one look

"IPC is indeed troublesome. Didn't you kid say it was going smoothly? Why didn't you tell me when you encountered problems?"

Zhang Rongxuan blamed him angrily. After thinking for a while, he said in a deep voice: "Let's do this, I'll go to the School of Mathematics to help you borrow someone."

He was quite optimistic about Guo Ziyang. This kid doesn't look very smart, but he has perseverance and a sense of responsibility.

"Professor, we have already found a suitable candidate."

Guo Ziyang said embarrassedly.

"Found one?"

"Yeah, a good friend of mine from high school."

Hearing this, Zhang Rongxuan couldn't help but smile lightly. These young people really have no experience, "Little Guo, IPC is not simple, ordinary people can't handle it. Listen to me, go to the School of Mathematics and find someone."

Ding~

Guo Ziyang's phone rang with a call notification.

He originally didn't want to pay attention to it, but seeing that it was Xu Qingzhou calling, he was suddenly shocked and swallowed the words he wanted to say.

"Professor, it's my friend's call."

Zhang Rongxuan waved his hand: "Answer it first."

"Zhouzi, how is the situation?"

Guo Ziyang asked impatiently. A few days ago, Xu Qingzhou said it would be ready soon.

"Fatty, you'd better be mentally prepared." Xu Qingzhou's voice came from the phone.

Guo Ziyang's heart skipped a beat.

"I've tried my best, but it's far from the standards you gave at the beginning, and it can even be said to be completely different."

"Ah?"

Guo Ziyang was stunned, "Completely different from the standards?"

There were only two people in the office. Zhang Rongxuan could vaguely hear some content, thinking to himself: "Sure enough, this is how it is. How can this thing be made by just anyone? It's not a child's play, and you can just find your friends."

"Yeah, the model has been sent to you, see for yourself."

"Oh, okay, okay, okay." Guo Ziyang put down his phone, still not recovered. Xu Qingzhou is so heaven-defying, yet he can't handle it?

"Little 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 gave him a guarantee a few days ago, saying there was absolutely no problem. No, next time they meet, he must slaughter him!

"It's okay, the first time doing a project is always like this."

After Zhang Rongxuan comforted him, he continued: "Professional things should be done by professional people. Don't be discouraged. I'll go to the School of Mathematics to ask later."

"He is quite professional."

Guo Ziyang added weakly. After a pause, he still excused his good friend, "Maybe, this model is not his field of expertise."

Ding~

Just as he was talking, he found that Xu Qingzhou had already packaged and sent the model.

"He sent the model over."

Zhang Rongxuan smiled and said: "Then let's see to what extent your friend's model has been done."

Guo Ziyang opened his computer and clicked on the email Xu Qingzhou sent him.

(End of chapter)