Chapter 876

Although Lu Zhou didn't know economics, in Princeton, any subject that had a little relationship with mathematics would have some relationship with those who studied mathematics more or less.

Especially economics.

Either a new social relations of production or a further expansion of the scope of human civilization will be born, or it will be difficult to create new theories through traditional theoretical research methods.

Therefore, if we want to make outstanding research results, mathematics is the only way for modern economists. Although this situation has been criticized by traditional economists as the behavior of showing off digital games, it really helps the industry solve the problem of countless doctoral graduates and employment.

In fact, after so many years of savage growth in the field of theory, mathematics is a deep and bottomless mine for any computing science. Whether we can excavate valuable things from it depends on how scholars in other fields use and improve the mathematical tools hammered out from numerous problems and integrate them into their own discipline.

Therefore, although Lu Zhou is not particularly interested in economics, when he appears in the caf é on the first floor of the Princeton Institute of higher learning at 3 p.m., occasionally a professor engaged in economic research will take the initiative to talk with him and discuss some mathematics problems that are not so difficult.

After spending so many years in Princeton, the economic bulls who had dealt with land and boat had no hands to count.

Not to mention those who have won the Nobel Prize, even the editors of nature and science have a lot to do with him.

Anyone who has a normal IQ will not risk offending such a big man by taking a master's diploma and degree card

As for why the land boat must be the corresponding author

It's not that he cares about the corresponding author of a paper. It's just that he doesn't want Xiao Tong's tutor to take advantage of him.

Although he was still worried, seeing that all the old omnipotent brothers had said so, Xiao Tong stopped insisting. After asking about his parents and how he had been recently, he hung up the phone reluctantly under the urging of the hungry boat.

After closing the laptop, I stretched out a lazy boat, took out my mobile phone and ordered a takeout. Then I opened Xiao Tong's unfinished paper and read it line by line.

"Let me see It's kind of interesting? "

Although he didn't understand the Bewley model very well, the part involving mathematics was no different from the math homework of primary school students.

After all, no matter how complex the model is, it is impossible to be more complex and chaotic than the plasma turbulence system. And even the NS equation and the plasma turbulence model, two world-class problems, can be solved. It's just a Bewley model, not even qualified to give him shoes.

For the understanding of functional analysis, if he thinks he is second, no one can call it first.

However, it is also helpful for his research to occasionally think about some simple problems.

Anyway, the takeout hasn't been delivered yet. It's also idle when you are idle. It's better to relax.

Holding a ballpoint pen in the right hand and putting it on the keyboard in the left hand, I quickly went through the information in the attachment. The tip of the pen pinched on the fingertip of the land boat is like a flying wheel, running a series of smooth and neat marks from the paper.

"Simple as it is, it's a very interesting mathematical problem Who talked to me when I was in Princeton? I can't remember it very well. "

“…… Why use Lagrange multiplier method to solve every step of the optimization process? " When calculating to a certain block, the tip of the pen in the book pauses for a few seconds.

But it's only a few seconds.

"You can use the endogenous grid method..." He muttered to himself, and the boat crossed out the previous steps and wrote down a new formula.

"The endogenous grid method is also troublesome. It can directly optimize the original mathematical model and save at least 20% of the tedious operations Maybe 25%. "

This kind of problem can't even be solved.

The surging inspiration, in an instant, broke down the wall in front of the finish line.

Writing down the last line of calculation, the boat leaned back on the office chair, slightly lowered the screen of the notebook, and let the front camera aim at several pieces of sketch paper.

"Little AI, help me sort it out."

"By the way, by referring to the Bewley model, compile a new algorithm for my new model."

Xiaoai: [received ~ give it to Xiaoai! (? ±?)

almost as fast as the speed of turning the page of the land boat. Xiaoai, who completed the scanning of the calculation steps in the shortest time, quickly sorted out the whole mathematical model, and marked out the possible problems or clerical errors in front of the land boat.

Lu Zhou just glanced at the mark area, and then nodded to the computer.Soon the data was uploaded to the quantum computer located in the underground of Jinling Institute of higher learning. Almost a few seconds after the completion of data transmission, the feedback data came from the quantum computer.

AI: [algorithm compilation completed! (?????????)

Xiaoai: according to the comparative test of 12777 groups of random parameters, the numerical calculation results of the improved mathematical model are basically consistent with the original model, the dispersion is reduced by 13%, and the operation efficiency is increased by 21%. It's not clear what the dispersion of the calculation results means, but the 21% improvement of the operation efficiency basically meets his expected results.

In other words, if quantum computer is used to check master's thesis, will it feel like shooting flies with cannon?

Forget it, forget it.

Who wants him to have only such a sister?

What's more, the electricity charge in Jiangsu Province is not worth much

Thinking of this, Lu Zhou looks at the computer and continues to order.

"Edit an email for me, and send the algorithm and mathematical model together."

AI: [good master! (???)]

seeing the Yan characters behind the bubbles, Lu Zhou suddenly thought of something, and then said, "by the way, remember not to put your Yan characters and expression packs in the email, just send it out normally."

AI: [∑ (っっっ;) っ]

land boat: "...?"

Although I don't quite understand what Xiaoai's expression means, Lu Zhou doesn't want to destroy her big, handsome, intelligent and reliable brother's image in her sister's mind because of several facial characters or off-line expression packs.

It's been almost five minutes since the email was sent.

His mailbox received Xiaotong's reply.

Although the content of the email is very short, it's even as short as three characters

【？？？ ]Seeing these three question marks, Lu Zhou's mouth lit up a happy smile.

I think Xiaotong didn't expect that he only spent an hour to solve such a "difficult" problem.

"In a word, it's been an hour. How come my take out hasn't arrived?"

Kneading his belly, Lu Zhou took out his mobile phone and was about to call the delivery man, only to find that his take out had been signed in 20 minutes ago.

Recumbent groove?

Who took my takeout?

Just now, he was so involved in solving the problem that he didn't notice the phone's reminder at all.

Just as Lu Zhou was in a daze, there were three knocks at the door of the office, and then Wang Peng, who was carrying the packing box, came in.

"Your stewed chicken and rice," Wang Peng said with a sigh as he put the plastic bag with the packing box on the table, "shall we have a discussion? I'll buy you what you want. Can we stop taking out later? It's just to increase the difficulty of our work. "

"It's easy for people to finish when they are hungry," Lu said with a embarrassed smile, reaching out to take out the packing box from the plastic bag Say, how did you deliver it? "

Wang Peng: "it's safer for me to deliver."

Lu Zhou: "this means that my safety level has increased again?"

Wang Peng hesitated and nodded his head.

"Well."

There's nothing to hide about this kind of thing.

Just like when the controllable fusion research entered the critical stage, the local military region directly transferred a company to be responsible for the security work of his residence, until the Pangu fusion reactor was connected to the power grid, it was adjusted to the normal level.

Now, although it is not as exaggerated as the controllable fusion research and the international form is not as severe as it was at that time, the carbon based chip, after all, is related to the future of the domestic semiconductor industry, so it is right to be careful.

Hearing the sound, Lu Zhou broke off his chopsticks and stopped immediately. He gave Wang Peng a silent look.

Just when Wang Peng was a little confused, Lu Zhou coughed and said.

“…… You didn't do that Have a taste of something like that? "

Although we can't talk about cleanliness, or maybe it's a little

It doesn't matter if he eats at the table, except for the food that others touch, he can't eat psychologically or physiologically.

"How could it be?!" Choked by Lu Zhou's words, Wang Peng coughed twice before slowing down. "It's all in the same era, and there's no way to test poison. But you don't have to worry about health. Dr. Yan has done a simple test. There must be no problem with health. "

Lu Zhou: "..."

MMP！

It turned out that I took my takeout and went to do a test. How can I deliver it so slowly!

So that he almost threw a bad comment back.

Just hear Wang Peng this explanation, land boat immediately more entangled.Before I sent it, I passed doctor Yan's hand

This guy has a criminal record

Lu Zhou still remembers that he stole his coke a year ago.

No, it should be said that Mingqiang used to drink it.

At the thought of here, looking at the take out boat, I couldn't help thinking.

Eat or not?

What a tangle