Omnipotent Data

Can external spin serve be realized in reality?

Judging from today's major tennis professional competitions at home and abroad, only a few top professional players can play the serve effect in the anime.

The external spin serve is called the side internal top spin serve in the technical terminology of tennis!

To put it simply, it is a general serve plus a huge spin, so that it suddenly bounces to the opponent's face after a strong spin on the ground.

Of course, it is almost impossible to play the huge power like in the anime. The tennis ball itself is spinning, and if it is coupled with powerful force, even Nadal, a super spinner, can't control the direction of the tennis ball. It would be ridiculous if an awesome outspin serve was sent out of bounds!

In fact, the external rotation serve generally plays a role in deterring the enemy on the field.

Let your opponents know how awesome you are, and you can even serve such a tricky outspin serve.

If you really can't get it, it's better to serve it honestly.

And Cheng Nuo, who aspired to become the "Prince of Tennis". The Prince of Tennis unique serving method, I must show it off.

…………

The height of tennis ball is 258 meters, the diameter is 254 centimeters, the weight is 528 grams, and the elastic deformation is 0559 centimeters...

The jump height is 2035 cm, the swing direction is 4558 degrees from north to east, and the force is 542 N...

Cheng Nuo saw the flow of data.

Groups of data are combined into the best batting plan.

The onlookers only saw that Cheng Nuo threw the tennis ball high with his left hand. Afterwards, the whole figure jumped upwards, the toes were off the ground, and the right hand swung the racket vigorously.

The racket hits the tennis ball head-on.

Like an instant cannonball, the tennis ball was shot towards the opposite court at a speed that was difficult to catch with the naked eye.

The speed of the ball is 5025 kilometers per hour, and the speed is 584 revolutions per second...

Estimated landing point: 028 meters away, 58 degrees west by south.

Estimated landing time: 085 seconds!

Perfect serve!

After Cheng Nuo saw this set of data, he couldn't help expressing his satisfaction with the outspin serve.

In reality, the reason why the top professional players can't hit the perfect outspin serve is nothing more than the inability to guarantee that the tennis ball can accurately control the direction of the ball while having a very high speed.

But these didn't seem to be a problem for Cheng Nuo, who could accurately grasp the data.

so……

The first perfect outspin serve in the real world appeared in a small team trial on the Tsinghua campus!

boom!

The surrounding audience only felt a flash of green light in front of their eyes,

Then came the heavy thud of the tennis ball hitting the ground.

A tennis ball with full spin does not stop spinning after it hits the ground.

Instead, after rubbing against the ground for a few tenths of a second, relying on the strong rotational force, it bounced hard in a certain direction.

The direction in which the tennis ball rebounded was the direction in which Cheng Nuo's opponent, the boy wearing glasses, was standing.

And he...has no time to dodge at all.

call out-!

Tennis balls flew past his glasses. The distance is less than one centimeter.

These data were all calculated by Cheng Nuo, with extremely small errors.

call!

The boy wearing glasses let out a deep breath, fine beads of sweat had already oozed from his forehead.

He raised his head and looked at Cheng Nuo with deep shock.

"Outspin serve! This is an outspin serve!!"

Among the onlookers, a sophomore boy pointed at Cheng Nuo and said loudly in shock.

Cheng Nuo put the tennis racket on his shoulder, put his left hand in his pocket, and smiled faintly, "It's a small thing."

"The more I promise, the more I promise, it's just a waste of fame!"

…………

As soon as Cheng Nuo's outspin serve came out, there seemed to be no suspense in the court trials.

Cheng Nuo's opponent didn't even have the courage to fight Cheng Nuo, so he directly abstained.

In this way, Cheng Nuo and nine other players formed the tennis team of the School of Economics and Management.

Compete in the intramural tennis tournament held in about two weeks.

The tennis team trains every three days.

Cheng Nuo was taking two professional courses while preparing for the tennis match.

Since Professor Lu had already agreed to Cheng Nuo's application for exemption, Cheng Nuo could skip all advanced mathematics courses.

Of course, exemption from listening does not mean exemption from repair.

You don't need to listen to the lectures, but you still have to take the exam.

Professor Lu told Cheng Nuo that if he couldn't rank in the top ten of his major in high mathematics at the end of the semester, then Cheng Nuo didn't want to skip a single section of high mathematics next semester.

As for the math department exam, strictly speaking, Cheng Nuo is still a student who is just a student. Cheng Nuo just wanted to participate, but it seemed he couldn't.

Cheng Nuo expressed great regret for this.

…………

"Cheng Nuo, I have good news for you!" The night before the tennis match, Cheng Nuo suddenly sent a message from Wang Genji's QQ.

Cheng Nuo replied quickly, "Is there any progress on the project?"

Calculating carefully, it has been almost a month since Wang Genji got the first part of the project that Cheng Nuo finished writing.

But Wang Genji's side, like an infertile little daughter-in-law, didn't hear any news. Let Cheng Nuo be her husband, ah! As a junior, I am very anxious!

Now that Wang Genji said there was good news, Cheng Nuo's first thought was that the project had made progress.

Wang Genji said haha, "Uh haha...we will discuss the subject matter later. What I want to tell you today is about my thesis?"

Cheng Nuo: ""The Solution of a Class of Linear Stochastic Differential Equations"?"

Wang Genji: "Yes, it is this paper. Three days ago, I resubmitted this overhauled paper to Yingguo's "appliedatheatislette"."

"Just now, I received an email from the review editor. Do you know what the specific content is?"

Cheng Nuo typed without the slightest interest: "I don't know."

\u0026what! ! ! "

Over there, Wang Genji looked very excited.

He was not sent back to overhaul or minor repair again.

This time, Wang Genji submitted the manuscript directly!

"Ahahaha!! Passed directly!! This is the treatment that only the academics can enjoy!! It's so f*cking cool!"

Cheng Nuo: "Oh."

"In this case, I will have two si in my pen. When applying for insurance research, the chips will be much bigger."

Cheng Nuo: "Oh, congratulations."

Wang Genji: "Cheng Nuo, don't keep oh oh oh, this matter, and your matter!"

"Me?" Cheng Nuo was a little confused, "What does it have to do with me?"

Wang Genji: "The author of that paper, I filled in, is not alone."

Cheng Nuo seemed to have guessed something.

Wang Genji didn't say anything, but just sent Cheng Nuo a document.

Among the files are papers that have been confirmed to be included in si journals after Wang Genji's overhaul.

Open the paper. In the column of the signed author, the names of two people are impressively written:

Wang Genji, Cheng Nuo!

Joint signature!