Chapter 245

Do you think Xueba is really happy?

Yes, you can't imagine the joy of learning Ba!

-- Excerpted from the quotations of Cheng Nuo

On the seventh day of national day, college students returned to school one after another.

In Tsinghua campus, the vitality and vigor of the past have been restored.

Cheng Nuo continued to carry a pile of books, early came to the original location of the green glaze Internet cafe, began the day's work.

Tired is tired, bitter is bitter.

However, the feeling of pretending to be forced is really It's so cool!

Yesterday, Cheng Nuo has constructed the discrete one-dimensional Helmholtz equation of CCD format.

The next step is the more complicated and difficult stage from one dimension to two dimensions.

Cheng Nuo sits in front of the computer, frowning tightly, while turning the pen, constantly searching for the solution steps in his mind.

The huge data stream, in the mind unceasingly intersection collision.

After sitting dead for more than half an hour

"Yes

Cheng Nuo immediately straightened up, ten fingers hit the keyboard, write down his inspiration.

"From one-dimensional to two-dimensional, that is, a single X-axis coordinate is transformed into x, y-plane coordinates. Then, after constructing the two-dimensional Helmholtz equation of Dirichlet boundary conditions, the definition domain is divided into equidistant networks, and n ^ 2 grid points are obtained... "

“（xi，yi)=（（i-1h，（j-1)h)，…………”

In my mind, my thoughts are flying.

This problem is just like a woman who is shy and waiting to be fucked. As long as you untie her first button, the rest of the thing will be just as it is!

Pa Pa Pa Pa ~ ~

Cheng Nuo tried to conquer her with both hands.

On forehead, do not know when already covered with sweat. But Cheng Nuo didn't mean to stop, still in

Pa Pa Pa Pa Pa!

It's the sound of fingers tapping on the keyboard.

…………

In the evening.

Cheng Nuo is in the Internet bar burst liver all day, just drag tired body to return to bedroom.

Academic this thing, European emperor and krypton gold are not feasible.

Only exploding liver is the king!

If you are not familiar with so many academic bulls at all times and in all over the world, they are all early gray hair.

Two days in a row, Cheng Nuo's body is almost unable to hold up.

After returning to the dormitory and drinking a bottle of Shenbao, Cheng Nuo climbed into bed, closed his eyes and cultivated himself.

Tomorrow will resume classes, Cheng Nuo must adjust his state, with full enthusiasm, into the learning of this great and arduous career.

As for the subject

Cheng will also find time to continue to study.

After two days of liver explosion, Cheng Nuo has completed about 50% of the content of the first part of his project.

The rest is expected to take more than a week.

…………

The next day, Cheng Nuo sat in the classroom, bored to stop a middle-aged professor on the podium talking about the content of "advanced mathematics".

Advanced mathematics is one of several public courses that their finance department took in their freshman year.

This course is not the most simple, but it is the most basic course among all the mathematics courses in the University.

Almost all engineering majors need to study this course.

As mentioned before, this course has long been rumored in the world. Everyone's color changed when they heard it.

But for Cheng Nuo

Soeasy！

Cheng Nuo, who has already heard the specialized courses of mathematics department, is not interested in the pediatrics of advanced mathematics.

It seems that we should discuss with the instructor whether he can take advanced mathematics courses in the future.

Anyway, he can learn all the knowledge of advanced mathematics in mathematical analysis.

Higher mathematics includes: limit theory (but without basic proof), one variable differential and integral, arc differential, multivariate differential and integral, elementary ordinary differential equation, series, space analytic geometry, vector algebra, etc.

Mathematical analysis includes: real number theory, (from three angles, dedkin partition, interval set, sequence describes how rational number is extended to real number) limit theory, (including basic proof, such as Cauchy convergence theorem proof), one variable differential and integral, multivariate differential and integral, series, etc.

It's about the same.

However, one is to pay attention to calculation and the other to theoretical proof. And the depth of mathematical analysis is deeper.

He yawned, put on his headphones, listened to the music, and continued to fill in the calculation formula and steps of the project on the draft paper.

The senior mathematics teacher who is lecturing exercises on the stage naturally takes Cheng Nuo's actions into his eyes.

He stepped off the platform, stepped to Cheng Nuo's side and tapped on his desk.Dong Dong!

Cheng Nuo turns his head and is jumped by the senior mathematics teacher standing beside him. He shuddered off his headphones.

"What's your name?"

"Cheng Cheng Nuo. "

"Since you don't have 30 seconds for the lecture, please give me your lecture

Cheng Nuo looks up at the blackboard.

Sure enough, on the top of the blackboard, there is a title:

"let the polar equation of curve C be r = a (sin θ 3) ^ 3, and find the total length of curve C?"

Cheng Nuo frowned slightly.

Teacher, you this question, the purpose, is to insult the intelligence quotient?

Seeing Cheng Nuo's frown, Gao Shu's teacher thought it was Cheng Nuo who was afraid. He continued to open his mouth, "I don't want to embarrass you. I just want the result and don't calculate the steps. Now, let's go... "

“32aπ。”

Senior Mathematics Teacher:

Before the word "start" was uttered by senior mathematics teacher Cheng Nuo, he was forced into his mouth.

So fast!

To tell you the truth, Cheng Nuo's speed of answering questions is unexpected.

Although the topic is simple, it will take him at least three seconds to do it in person.

Can Cheng Nuo this man, only used less than a second!

So terrible!

Senior mathematics teacher had to look at Cheng Nuo with a new look.

……

"Ring bell..."

The bell rings after class.

Cheng Nuo packed his schoolbag and looked at the math department's timetable this afternoon.

There is a higher generation in the May 6th Festival and a jieji section in the 78th section.

Ah, tragedy is like me, another day full of class.

When Cheng Nuo pities himself, a graceful figure appears in front of Cheng Nuo.

"Classmate Cheng Nuo, can I talk to you about something?"

It was Yan Yunqing who spoke.

Oh, yes, the monitor of Cheng Nuo's class. No.1 of the class committee!

"Yes, please."

Cheng Nuo is happy to chat with beautiful women.

Yan Yunqing had a capable look, "it's like this. The Mid Autumn Festival is coming. Our college is going to hold a mid autumn party. Two classes are required for each program. "

"I can sign up for a program, but I still need one. Classmate Cheng Nuo, I hear you sing well. Why don't you sign up for a show

Mid autumn party?

Cheng Nuo really didn't know about the mid autumn party.

"Me?" Cheng Nuo points to himself.

"Yes Yan Yunqing nodded with a smile, "Cheng Nuo, as a class committee member, should play a leading role. Only in this way, your image in the students will be tall. "

"Besides, there is a reward for attending this party?" Yan Yunqing smiles mysteriously.

Cheng Nuo eyes a bright, "reward? Is it credit? "

Yan Yunqing shook his head with a smile and raised a finger, "no, it's a bag of moon cakes."

Cheng Nuo:

Finally, under Yan Yunqing's persuasion, Cheng Nuo finally agreed to perform on stage. However, there are conditions.

"But I need an instrument to play on stage. Make the performance perfect. If you can borrow it for me, I promise to play

Yan Yunqing said, "no problem. Let's talk about it. What kind of musical instrument is it? I'll borrow it from senior students."

Cheng Nuo gently spit out two words: "erhu."

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