universal data

Chapter 244 Congratulations!

Located near Tsinghua University, this Internet cafe called Qingyu.

Cheng Nuo took out the last "History of Modern Mathematics" in his schoolbag, then put on the headset, turned on the computer, and created a word document under the bewildered eyes of the chicken-eating players nearby.

"Preprocessing method for joint compact differential discrete equations of two-dimensional Helmholtz equation""

Cheng Nuo typed the title of the topic on it.

Rub your hands together, move your fingers, and twist your neck.Cheng Nuo was doing warm-up exercises.

On the left hand side, there is a whole stack of seven or eight reference materials.

On the right hand side, there are draft paper, gel pen, ruler, eraser...

Everything is ready, just start working!
Cheng Nuo didn't waste any time and followed his plan.Throughout the day today, he intends to complete at least 20% of the tasks he is responsible for.

There will be classes after the November holiday, and things will get busier.There is not much time left for Cheng Nuo!

Click on the song "Where Are You Going, Xueba?" With the dynamic music coming from the headset, Cheng Nuo started his project work.

"There is a very cool person in our class. He is the top student and no one dares to stand in his way."

"Students have been reading books all the time, and they even have to run to go to the bathroom."

…………

"Xueba, Xueba, where are we going? Will tomorrow's exam be a test?"

"Student, scumbag, don't read it anymore! You won't remember it after reading it!"

Cheng Nuo was humming the lyrics while typing with both hands on the keyboard.

To derive the two-dimensional Helmholtz equation from the discrete one-dimensional Helmholtz equation in the CCD format, we must first figure out what this pretty little girl looks like in the one-dimensional Helmholtz equation.

More than a year ago, there was a project dedicated to the study of the one-dimensional Helmholtz's sixth-order compact difference method.

So Cheng Nuo can directly refer to that thesis for some things about the one-dimensional Helmholtz equation.

First, consider the one-dimensional Helmholtz equation for Dirichlet boundary conditions.

f''(x)+k^2f(x)=g(x), x∈Ω=(0, 1)
f(x)=0∈αΩ

k represents the wave number.

Next, divide the domain into...

Cheng Nuo's brain was running fast.

Cheng Nuo flipped through the seven or eight books on Cheng Nuo's left, looking for the information he needed.

As for the stack of draft paper on the right, Cheng Nuo basically wouldn't use it.

Because, whether it was the college entrance examination or the questions given by the teachers in the mathematics department, they were all too simple, and it wasn't worth Cheng Nuo's use of "scratch paper", the treasure of a top student.

But it's different now.

In just one morning, Cheng Nuo had already used more than ten pieces of draft paper.

Every piece of draft paper is full of formulas that make ordinary people look like ghosts.

The progress of the project is also developing in a gratifying direction.

Although Cheng Nuo's brain width was higher than that of ordinary people, it was not yet out of the ordinary.

Cheng Nuo was only a freshman, so this time, Cheng Nuo didn't do it like usual, as soon as he got the subject, he just settled it with ease.

With the support of the powerful computing power of the brain, Cheng Nuo can't claim to be strenuous, but it's not easy either.

…………

Inside the Celadon Internet Cafe.

Cheng Nuo's existence, like a stream of clear water, still attracted the attention of many people in the Internet cafe.

Because Cheng Nuo was sitting in the section near the entrance of the Internet cafe.So whenever a new customer came to the door and passed by Cheng Nuo, he would notice that a young boy was flipping through a book while writing and drawing.His hands were still frowning and thinking hard, and sometimes he suddenly smiled.

From time to time, he would laugh out loud, "Wow Kaka, this formula should be used, it's so annoying!"

???

Could it be that I... went to the wrong place.

The customers who wanted to eat the chicken looked confused.

Of course, there were also people who were curious and deliberately walked behind Cheng Nuo, wanting to see what Cheng Nuo was up to.

In the end, when he saw the pile of dense and extremely complicated formulas on Cheng Nuo's computer...

Boss!Boss!
RBQ, RBQ!I really can't afford it!

Farewell, don't send it!
Under Cheng Nuo's halo of being a top student, the scumbags automatically retreated!

…………

At noon, Cheng Nuo was too lazy to go back to the dormitory, so he ordered a takeaway.

"Brother, help me look at things for a while, I'll go down and get takeaway." Cheng Nuo patted the shoulder of the buddy sitting next to him, and said with a smile.

The buddy sitting next to Cheng Nuo was a thin man with glasses and a sallow complexion.

From the looks of it, he is a "lustmate" who has been masturbating for more than five years.

That buddy has been playing chicken eating all morning, and abruptly completed a game of eating chicken and a skydiving game.

"No problem. Master Xueba!" The young man gestured OK to Cheng Nuobi, then rubbed his stomach, muttering to himself, "I'm a little hungry."

When Cheng Nuo came back with the takeout, he saw the guy slurping instant noodles and eating deliciously.

Cheng Nuo sat down next to that buddy, turned his head and said to the young man painstakingly, "Brother, the paper bowl used for instant noodles is unhealthy. Uh... I heard from an expert."

The young man smiled, sucking on the instant noodles, and finally blurted out, "Health? Hehe, does that expert know about instant noodles? I'm so fucked up to eat instant noodles, I still care about health!"

Cheng Nuo couldn't refute the young man's words.

"Stop talking, stop talking, eat, eat."

Cheng Nuo rubbed his hands, swallowed and opened the takeaway bag.

Inside... is a barrel of fragrant instant noodles.

…………

"The discrete one-dimensional Helmholtz equation in CCD format is obtained as follows: Af:=...(ㄒoㄒ)/┏(゜ロ゜;)┛..."

Crackling, crackling~~
Throughout the Internet cafe, the sound of rhythmic fingers tapping on the keyboard resounded.

It's just that some people are playing while others are learning.

"f=[f1, f2...fN]^T, f'..."

"Huh, it's finally done!"

At seven o'clock in the evening, Cheng Nuo produced the one-dimensional Helmholtz equation in CCD format.What a sense of accomplishment!
I planned to use two days to get the one-dimensional one out, but I didn't expect that it was in good condition, and the time was cut in half.

Then tomorrow, you can start exporting two-dimensional work.

The night had already fallen, and the streets outside were already brightly lit.

Cheng Nuo then remembered that he was too absorbed in writing and hadn't eaten dinner yet.

After stretching, Cheng Nuo took off the headset.As soon as he looked up, Cheng Nuo found that almost everyone in the Internet cafe was not playing computer games, but raised their heads one by one, looking at the big screen in the Internet cafe.

And what was broadcast on the big screen was the finals of the LPL professional league.

EDG V RNG.

The score, 1:2.

At this time, it has come to the end of the fourth inning. RNG has an absolute advantage.

The perfect group of five people on the high ground, wiped out four enemies, pushed the ground high, and broke the front teeth.

boom--!
When the blue square crystal shattered, the commentator roared with the loudest voice: "Let's..."

"Congratulations RNG!"

The entire Internet cafe was boiling.

…………

PS: Congratulations to RNG for winning the 2018 LPL Spring Festival Championship!
Congratulations to UZI for winning the Spring Playoffs MVP!

(End of this chapter)