Chapter 260: Joint signature

Can an external spin serve be achieved in reality?
Judging from the current major tennis professional competitions at home and abroad, only a few top professional players can play the serve effect in anime.
The external spin serve is called side-inward spin serve in tennis technical terms!
Simply put, it is a normal serve plus a huge spin, so that it suddenly bounces toward the opponent's face after a strong spin on the ground.
Of course, it is almost impossible to play the huge power like in anime. The tennis itself is spinning. If you add a strong force, even Nadal, a super spinner, can't control the direction of the tennis. If by any chance a horrible external spin serve, it is sent directly out of bounds, that would be funny!
In fact, the external spin serve generally serves as a deterrent to the enemy on the court.
Let your opponent know how awesome you are, and you can even serve such a tricky outside spin.
If you can't get it, it's better to serve it honestly.
And Cheng Nuo, a figure who aspires to become the "Prince of Tennis". The prince of tennis's unique serve style must be demonstrated by himself.
…………
The height of the tennis ball is 258 meters, the diameter is 254 cm, the weight is 528 grams, and the elastic deformation is 0559 cm...
The jump height is 2035 cm, the swing direction is 4558 degrees east of north, and the force is 542 N...
Data flow in Cheng Nuo's eyes.
A group of data, combined into the best shot plan.
The crowd onlookers only saw that Cheng Nuo threw the tennis ball high with his left hand. Afterwards, the whole body leaped upward, the toes were off the ground, and he swung the racket vigorously with his right hand.
The racket hit the tennis ball head-on.
Like an instant cannonball, the tennis ball is shot towards the opposite court at a speed that is difficult to catch with the naked eye.
The ball speed is 5025 km/h, the rotation speed is 584 rpm...
Expected landing location: 028 meters away, 58 degrees west of south.
Estimated landing time: 085 seconds!
Perfect serve!
After seeing this set of data in his eyes, Cheng Nuo couldn't help expressing his satisfaction with this external spin serve.
In reality, the reason why top professional players can't make a perfect-intensity external spin serve is nothing more than a guarantee that tennis can accurately control the direction of the ball while having a very high speed.
But these seem not to be a problem for Cheng Nuo, who can accurately grasp the data.
and so……
The first perfect external spin serve in the real world appeared in a small college team trial on Tsinghua campus!
boom!
The crowd around the audience just felt a flash of green light before their eyes,
Then there was the heavy impact of the tennis ball hitting the ground.
After hitting the ground, the spinning tennis ball did not stop spinning.
On the contrary, after rubbing against the ground for a few tenths of a second, it bounced in a certain direction with a strong rotation force.
The direction in which the tennis rebounds is the direction in which Cheng Nuo's opponent, the boy with glasses stands.
And he... has no time to dodge.
call out-!
The tennis ball flew past his mirror frame. Distance, less than one centimeter.
These data are all calculated by Cheng Nuo, with minimal error.
call!
The boy wearing glasses exhaled, and fine beads of sweat were already oozing on his forehead.
He raised his head and looked at Cheng Nuo with a deep look of shock.
"External spin serve! This is an external spin serve!!"
Among the crowd onlookers, a sophomore boy pointed at Cheng Nuo and said in a shocked voice.
Cheng Nuo put the tennis racket on his shoulder, pocketed his left hand, and smiled faintly, "Small."
"The more I am promised, how can I get a false name!"
…………
As soon as Cheng Nuo's external spin serve came out, there seemed to be no suspense in the court trials.
Cheng Nuo's opponent didn't even have the courage to play against Cheng Nuo, and directly announced his abstention.
In this way, Cheng Nuo and nine other players together formed the School of Economics and Management Tennis team. The competition will be held in the intramural tennis tournament about two weeks later.
The training of the tennis team is once every three days.
Cheng Nuo was taking two professional courses while preparing for the tennis match.
Since Professor Lu has agreed to Cheng Nuo's application for exemption, all the advanced math courses Cheng Nuo can not go.
Of course, exemption does not mean exemption.
You don’t need to listen to the class, but you still have to take the exam.
Professor Lu told Cheng Nuo that if his final grades in high mathematics cannot be ranked in the top ten of his major, then Cheng Nuo would not want to skip one of the high math classes next semester.
As for the exams in the Department of Mathematics, in a strict sense, Cheng Nuo is still considered as a student. Cheng Nuo just wanted to participate, but it seemed that he couldn't participate.
In this regard, Cheng Nuo expressed great regret.
…………
"Cheng Nuo, tell you a good news!" Cheng Nuo suddenly sent a message from Wang Genji QQ the night before the tennis match.
Cheng Nuo quickly replied, "Is there any progress on the subject?"
After careful calculation, it has been almost a month since Wang Genji got the first part of the subject written by Cheng Nuo.
But Wang Genji's side, like an infertile little daughter-in-law, didn't hear any news. Let Cheng Nuo be the husband, ah! As a student, I am very anxious!
Now that Wang Genji says there is good news~EbookFREE.me~ Cheng Nuo thinks of progress in the first time.
Wang Genji slapped haha, "Uh haha... we will discuss the subject matter later. What I want to tell you today is about my paper?"
Cheng Nuo: ""The Solution of a Class of Linear Stochastic Differential Equations"?"
Wang Genji: "Yes, this is the paper. Three days ago, I submitted the overhauled paper again to Yingguo's Appliedatheatislette."
"Just now, I received an email from the reviewer and editor. Do you know the specific content?"
Cheng Nuo typed with the slightest interest: "I don't know."
&what! ! ! "
Over there, Wang Genji looked very excited.
He was not beaten back to major or minor repairs again.
This time, Wang Genji directly contributed!
"Ahahahaha!! Go straight through!! This is the treatment that the academics can only enjoy!!! It's so cool!"
Cheng Nuo: "Oh."
"In this case, I have two si in my pen. When you apply for undergraduate studies, you will have a lot more chips."
Cheng Nuo: "Oh, congratulations."
Wang Genji: "Cheng Nuo, don't keep going, oh oh oh, this matter, and your business!"
"Me?" Cheng Nuo didn't understand, "What's the matter with me again?"
Wang Genji: "I am not the author who signed that paper."
Cheng Nuo seemed to guess something in his heart.
Wang Genji didn't say anything, but sent a document to Cheng Nuo.
In the file, after Wang Genji's overhaul, it has been confirmed by the si journal to be included.
Open the paper. In the column of signed author, the names of two people are written impressively:
Wang Genji, Cheng Nuo!
Joint signature!