Chapter 996 The finals begin!
The next few days passed by as fast as flying.
Almost in the blink of an eye, March 27th arrived.
According to the competition schedule, the final questions will be announced on time at three o'clock in the afternoon, and the answering time will begin immediately.
Total 48 hours.
Submit project documents and documentation before 3 pm on the 29th.
The scoring rules are basically the same as those in the preliminary round, and the scores are determined based on calculation speed, result accuracy and submission time.
But there is no two-out-of-three choices, only one must-answer question.
Because there were nearly 70 groups and more than 200 people participating in the finals, the venue was divided into three parts.
All located in the same conference center building.
Considering that the calculation amount of the finals will be much higher than that of the preliminary round, if you use a personal computer to participate, a lot of time will be spent waiting for calculation results and trial and error, and it is likely that you will not be able to come up with the final answer within 48 hours, so Chang Hao Nan even specially found a Sugon 3000 supercomputer and allocated part of its computing power for the competition.
As long as players log in to a temporary account and submit the calculation task, they can get the results in 1-2 orders of magnitude shorter than an ordinary PC.
Of course, as a final, some necessary sense of ceremony must be present.
It is definitely not possible to refresh the entire website like in the preliminary round. When the time comes, download a PDF and it will be considered a question.
Instead, all the contestants must be arranged in a conference hall first, and after Chang Haonan personally announces the questions, they can then go to their respective computer rooms to answer the questions——
It doesn’t actually matter if you didn’t hear it clearly or didn’t remember it, because there will be a pre-set question in the computer.
At the same time, since the competition lasted more than one day, there were no restrictions on the players' movements.
Even if you are not used to the computer provided by the competition, you can use your own device.
Just pass the test and register in advance.
Only registered electronic equipment can be brought into the computer room.
Furthermore, they cannot be taken out until the answers are submitted.
It can also be regarded as preventing cheating to a certain extent.
After all, numerical calculation is not college entrance examination mathematics. It is impossible to write the answer on a piece of paper or keep it in your mind.
As long as the storage medium is controlled, most methods will be ineffective...
……
It is said to be three o'clock in the afternoon, but many foreigners do not have the habit of taking a nap.
So just after dinner, people started to appear in the venue one after another.
This also includes the trio from Stanford University, Hertz and Jameson——
Although the team leader cannot be involved in the competition itself, the stage of announcing the topic itself is It is included in the opening ceremony of the competition and it is impossible to exclude others.
However, Jameson, as a special guest of the conference, has an exclusive position on the podium, and he definitely cannot sit down and listen.
"To be honest, Haltz."
Jameson looked at Haltz who was following him and said:
"Before today, I even thought you might not be able to get in. The venue is..."
This is of course not a mockery of the latter, but as a representative of COMSOL, Hertz has almost continuously signed contracts with nearly 10 industry giants involved in CFD in the past three days. Intent agreement, including software training, database sharing, priority use of new versions, etc.
Although this cannot be said to have successfully poached the corner of the Torch Group, at least the intention of swinging a hoe at the host has been clearly revealed, and the appearance is actually a bit ugly.
In this case, even if you are directly expelled as a troublemaker, others will not be able to say anything.
But in the end, Hertz’s application to participate in the conference was approved directly, which really surprised several others.
“To be honest, even I didn’t expect it to go so smoothly.”
Herz found a seat in the third row and put his briefcase aside:
“Moreover, this makes me even more suspicious that the Chinese people’s purpose is to set a trap on the types of questions in the finals, and then watch us make fools of ourselves in public...”
Jameson shook his head decisively:
"Probably not."
"Now almost the entire industry's media and users are staring at them. If the final title is different from the pre-set Good CFD topics are too far apart, then I can raise questions as a special guest, and no one will look good at that time..."
Lyles Connor sat down in a seat next to him, He then spoke:
“And in the past month, we have been practicing on our previous weaknesses. Even if we encounter particle flow or infinite boundary problems again in the finals, we will have ways to solve them.”< br>
"Taking a step back, it's okay..."
At this point, he suddenly hesitated.
After making sure there were no outsiders around, he continued in a low voice:
“You can use TORCH Multiphysics software to solve boundary problems during the calculation process, and finally use COMSOL to calculate the results, and then submit the project in .cmph format. Just a file.”
“Even if COMSOL is not good at dealing with this kind of problem, it is just a calculation. How can it not calculate a converged result?”
After such rounds of persuasion, Hertz, who was still a little unsure, calmed down again.
Indeed, my preparations are almost foolproof, and I have even prepared many emergency plans in advance.
This includes the trick that Lyles just mentioned.
Nothing should go wrong. Thinking of this, Hertz breathed a sigh of relief and prepared to lean back on the chair to recharge his batteries and take a short rest.
Tonight, he also has a meeting with Toyota...
The latter returned to the F1 field in 2002, but as a team that is not an established one, it is difficult to wait for hardware in the wind tunnel in a short period of time. Facilities are on par with opponents.
Therefore, they are ready to learn from Ferrari’s advanced experience and quickly improve the design efficiency and design level of aerodynamic components through cooperation with COMSOL...
……
Soon, the kick-off ceremony before the finals officially began.
There is no long and complicated process as imagined.
After Song Jingming spent about 10 minutes reviewing numerical calculations, and of course the development history of Torch Group (thanks to the short time since Torch Group was established, there really is no history to talk about), it turned out to be Chang Hao directly Nan took the stage to speak on behalf of the special guest and read out the final title.
Many people who had been prepared to be bored for a while were caught off guard.
“Today, I am very happy to see that all the contestants have won the fierce competition from their respective schools, which shows that you are already the best among your peers in this industry...”
“… …”
"No matter what the result of today's competition is, I hope you can make further progress in the field of numerical calculation in the future..."
Chang Haonan stood in front of the stage, neither picking up his speech script nor looking at the teleprompter, just Holding the microphone in one hand and putting the other in his pocket, he walked slowly.
After a few simple words of encouragement, he suddenly turned around and returned to the back of the podium, and at the same time motioned to the staff below to prepare to turn the pages of the PPT:
"Then, I will officially Announcing the title of the final!”
The entire venue fell silent instantly.
Everyone is waiting for new characters to appear on the PPT.
"Here, I can reveal in advance that it is a two-phase flow problem."
Chang Haonan once again sold a trick.
The audience who thought he would say the title directly let out a burst of "ugh~".
It also made the atmosphere in the originally dull conference hall much more relaxed.
And just before everyone's final words had finished, Chang Haonan made a sudden attack:
"5, 4, 3..."
The sound of counting directly made everyone Getting nervous again.
Fortunately, this time it was not a pass, but it actually counted to 1.
As Chang Haonan’s voice fell, the PPT was turned to the next page.
"In the production process of plastic products, microporous injection molding technology can reduce material consumption, reduce the weight of injection molded parts, improve injection molding thermodynamics, and shorten the cycle of the molding process. Therefore, it has received great attention since its advent in the 1980s..."
“…”
“According to the principle of microcellular foam injection molding, the first step of the process is to prepare a uniform mixture before the melt is mixed and accumulated in the screw head. A necessary condition before hole foaming injection, this requires that the screw mixing section must have corresponding mixing elements that can change the position of the bubbles from the top to the bottom and accelerate the diffusion and dissolution of the bubbles in the polymer..."
"Now set two polymer melts A and B. The specific properties are shown in Appendix 1 and Appendix 2 respectively. Please design a torsion element installed at the front end of the screw to mix the two substances AB. …”
“…”
Looking at the topic on the PPT, Professor Jameson, who was sitting on the podium, showed a hint of surprise at first, and then turned to joy.
Although the background of the question seems a bit unpopular, its essence is nothing more than a two-phase flow mixing problem.
Although the traditional finite volume method is not suitable for solving this kind of problem, the latest version of COMSOL happens to use the Lagrangian method of unstructured mesh to solve this problem to a certain extent.
As long as the boundary problem is solved, the solution can be solved step by step according to the normal CFD problem.
It will definitely not be difficult for Lyles and others who have been specially trained by him.
Thinking of this, Jameson even glanced at Chang Haonan behind the podium with a somewhat gloating look.
In his opinion, this should be a small trick used by the other party to set the question.
Use the boundaries of drastic changes in topology to limit the performance of COMSOL.
But he was so clever that he was misled by his cleverness.
At the same time, Chang Haonan on the stage was also paying attention to Professor Jameson's reaction from the corner of his eye.
After seeing the latter's expression and eyes, he knew that he was stable this time.
The other party did not notice the hidden pit in this question at all.
By the time the contestants realized something was wrong, it should have been the morning of the third day, approaching the submission deadline.
Even if he wanted to go back and use TORCH Multiphysics to remedy the situation, it would be too late...
In fact, Hertz's previous guess had almost accurately hit the truth.
However, Chang Haonan's methods were much smarter than everyone expected.
Coupled with excellent confidentiality measures.
In the end, such an unsolvable conspiracy was brought to the forefront.
(End of this chapter)