Chapter 258

It's a joint signature?!

Cheng Nuo is stunned for a moment.

Then he asked, "schoolmaster, why did you put my name on it?"

Wang Ji: "ha ha ha, Cheng Nuo, are you very moved now?"

"Don't thank you so much. To tell you the truth, if it wasn't for your guidance, it would be very difficult for me to publish this paper successfully. "

"This joint signature, even if I give you a reward."

In the final evaluation, there is still a big difference between a single signed SCI and a co signed SCI.

Wang Ji was willing to write Cheng Nuo's name on it, and he did mean to thank him.

By the way, let Cheng Nuo remember his friendship. The feeling comes from his love as a senior student!

After all, it was an opportunity to sign a SCI paper in an impact factor 2.333 journal. It plays an important role in the evaluation of various awards such as scholarships.

After waiting for a long time, Wang Jian saw Cheng Nuo's reply to him.

Cheng Nuo: "actually Schoolmaster, you are the only one to sign this paper

"If I want a chance to sign a SCI paper, I wish I could write any one. I don't have to bother you."

Whatever Just write one?

Wang Ji's heart is a little messy.

What does he think of SCI journals?

This is not the street of those women who slip, give money can go!

That represents the world's top paper evaluation criteria!

Especially in China, in the undergraduate stage, it is a great honor to have a paper included in SCI.

Wang Jian felt it necessary to carefully say with Cheng Nuo, "Cheng Nuo, SCI papers are not easy to write."

"You don't know my experience. It took two years and seven or eight minor revisions to be included in the first paper by SCI. Last time, this paper was directly called back by the reviewers for major repair. If it were not for you, my next SCI would have to wait until my senior year. "

"As for you, there is now a SCI paper signed by you. If we can make a SCI at the end of the second semester, we should have a promising future. "

Cheng Nuo wry smile, "schoolmaster, what I said is true."

"Why don't you take a look at this for me?"

Say, Cheng Nuo sends a document on the computer to Wang Ji via QQ.

What is this Wang Ji asked.

Cheng Nuo said casually, "a paper."

"I just finished writing today, and I'm going to give it to SCI journals for trial. In other words, do you have any foreign SCI journals that you recommend?"

"Schoolmaster, are you still there?"

Wang Ji: "wait a minute. I'll finish reading your paper first

A paper? Contribution to SCI?

Wang Ji's side, with a strange and inexplicable face, points to the document sent by Kaicheng Nuo.

Cheng Nuo's paper title: application of Taylor's formula in judging convergence and divergence of alternating series.

Taylor formula belongs to the content of higher mathematics course.

Staggered series belongs to the content of mathematical analysis course.

Staggered series is a very important series form, but the method of convergence is very limited.

In college textbooks, only Leibniz discriminant method is introduced. Moreover, the application conditions of Leibniz discriminant method are relatively strict, especially for the complex general term, the monotone decreasing condition is not easy to judge, most of them are difficult to guarantee.

Coincidentally, that afternoon, Cheng Nuo just made a topic related to Taylor formula from Professor Lu. So when the mathematics teacher of the mathematics department talked about the knowledge of staggered series, it was like a flash of light. Cheng Nuo had an idea in his mind:

can Taylor formula be introduced into the judgment of convergence of staggered series, expand the general terms of staggered series, and then judge the convergence term by term?

As soon as this idea comes out of Cheng Nuo's mind, it can't go away.

Simply, Cheng Nuo takes out the draft paper directly in class and calculates it.

After two classes, Cheng Nuo almost knew that his idea should be right.

Taylor's formula, which is widely used, is also applicable in judging the convergence of alternating series.

The rest is simple.

After more than a week, Cheng Nuo took advantage of the salted fish time to add and supplement and complete this paper.

…………

The camera goes back to Wang Jian.

When he saw the title of Cheng Nuo's paper, he was puzzled.

Taylor formula applied to determine the convergence of alternating series?

This is the first time that Wang Ji heard that he could do this.

With a skeptical attitude, Wang Ji continued to look down.The following is the main body of Cheng Nuo's thesis.

"From Taylor's formula, f (x) = f (0) + F '(0) x + F' '(￡) 2 * x ^ 2, where, ￡ is between 0 and X, so f (- 1 ^ NN) =..."

In this paper, by using Taylor formula, we give two theorems about the convergence of alternating series.

Theorem 1: Let f (x) have second-order continuous derivative in a certain field at x = 0, and f (0) = 0, then ∑ [∞, n = 1] f (- 1 ^ NN) converges.

Theorem 2: Let f (x) be in [- 1,1]

For each theorem, Cheng Nuo gave an example to prove it.

It is very detailed.

Half an hour, full use of half an hour, Wang Ji finally read Cheng Nuo's paper.

"Hooray!"

Wang Ji took a deep breath, staring at the computer screen, did not know how to describe his mood at this time.

Cheng Nuo's "Taylor formula in determining the convergence and divergence of alternating series application", he read from the beginning to the end, word after word.

It can be said that Perfect!

Perfect and impeccable.

As for the content of the argument, we can not find even one letter error.

From an outsider's point of view, this paper, if submitted to SCI, is likely to be included in SCI journals.

Nothing else, the application value of Cheng Nuo's paper is too high.

It is not only simple to use Taylor formula to determine the convergence of alternating series, but also to get rid of the limitation of Leibniz's method, so that there is a universal and practical method to determine the convergence of alternating series.

Wang Jian couldn't find any reason to reject this paper.

Wang Ji typed and asked, "Cheng Nuo, did you really write this paper?"

Cheng Nuo: "I wrote it, of course. Among the people I know, besides you, who can write a SCI alone? "

"Hahaha, so are you." In the face of Cheng Nuo's flattery, Wang Ji accepted without shame.

"By the way, how long have you been writing this paper? It's less than two months since the school started. You don't start preparing during the summer vacation, do you? " Wang Ji asked with a smile.

"Summer vacation?" Cheng Nuo is stupefied for a moment, understatement, "no, I used the last ten days, less than an hour a day, I made it."

Ten days, less than an hour a day?

Wang Ji was a little suspicious of life.

When can a SCI paper be produced in less than ten hours?

Is it that the times are developing so fast that I can't keep up with it?

Suddenly, Wang Ji thought of another thing.

"Cheng Nuo, I have something else to do here, so I won't tell you more."

"What's the matter? You haven't recommended any journals for me yet? "

"In this case, you can find those who have high impact factors in the Second District, and they will not refuse to submit."

With this sentence, Wang Ji went offline in a hurry.

Later, he even edited an email and sent it to Davis, editor of applied schema letters.

Why?

Of course, it's to see if we can delete Cheng Nuo's name from his paper.

Cheng Nuo, that guy, has ten days to make a SCI potential. His signature on this paper is still missing.

Then his joint signature can only dig a hole for himself.

…………………………

www.novelhold.com , the fastest update of the webnovel!