Xueba starts with change

Chapter 198 Refine the Time

Chen Zhou dragged the compressed package to a specially created folder, and then started to decompress the compressed package.

"Huh? Password?"

Chen Zhou didn't expect that Dean Yang encrypted the compressed package.

But if you think about it carefully, generally speaking, such subjects are all projects of the Institute of Physics, and it is normal to have a certain degree of confidentiality.

Chen Zhou took out his mobile phone and was about to call Dean Yang to ask for the password.

But before the call was made, Dean Yang sent another txt file.

After Chen Zhou received it, he opened the document, and it contained the decompression code [DZS1] of the compressed package.

Enter the decompression code, and the compressed package will be decoded smoothly.

Opening the decompressed folder, Chen Zhou couldn't help being taken aback.

Good guy, is Dean Yang afraid that he will be too idle at home during the summer vacation?Or are you worried that he is addicted to hail conjecture and unable to extricate himself?
In the folder named "Principles and Applications of Intense Pulsed Particle Beam", there are dozens of folders, large and small, and there are folders in the folder...

"No wonder it took so long to download. There are too many subject materials for this project, right?" Chen Zhou muttered in his heart, and opened a document with the mouse on his hand.

【Extreme application of high power particle beam】

Chen Zhou took a closer look.

High-power particle beams, generally speaking, are called intense relativistic particle beams, including electron beams and ion beams.

This is a concept that is not too old.

Chen Zhou remembered that he saw in a document that in the 50s, the concept of high-current relativistic electron beams was proposed.

By the end of the 80s, under the pioneering work of Professor Martin in the United Kingdom, the practical application of high-current relativistic electron beams became possible.

However, the background of the 30 years of research is under the conditions of the changing international situation.

In the early 60s, Professor Martin of the British Atomic Weapons Research Center and his team first proposed the use of pulsed power technology to generate high-power electron beams.

And successfully applied the transmission line technology to the research of pulse power, thus creating a new situation of pulse power technology.

It was also from this time that high-power electron beam accelerators began to develop as a source for simulating the effects of nuclear weapons.

In the late 70s, due to the proposal of the particle beam inertial confinement fusion scheme, high-power particle beams began to develop towards higher power levels.

In the past few years, the major laboratories of the major powers in the world have successively built a large number of generating devices.

The domestic research on high-power electron beams in Huaguo started from the development of pulsed X-ray machine technology in the early 60s. At the end of the 60s, research on nanosecond pulse high-voltage technology began.

It was not until the 70s that it officially turned to the development of high-power pulsed electron beam accelerators.

Now, about high-power electron beam and ion beam technology and its application to many scientific research fields.

Such as nuclear explosion simulators, high-energy flash X-ray radiography, internal electromagnetic pulse research, inertial confinement fusion, excitation of free electron lasers and high-power gas lasers, etc.

The emerging disciplines derived from it also include radiation-resistant electronics, relativistic electronics, intense beam physics, and so on.

Generally speaking, high-power particle beam is a relatively active cutting-edge science and technology at present, and it is also an important technical basis for intense laser research.

Withdrawing his thoughts, Chen Zhou continued to look at the documents in front of him.

Until noon, Chen Xiao knocked on the door and called him to eat.

Chen Zhou came back to his senses from the world of particle beams.

Chen Zhou didn't get up in a hurry, he just turned around and told Chen Xiao to come over right away.

Turning around, Chen Zhou looked at the documents on the computer in front of him, thinking slightly.

For him, the difficulty of Dean Yang's subject this time is a bit beyond the standard.

Although Dean Yang said that he is only responsible for processing the data of the subject, and he can use his strengths in rigorous calculations in mathematics.

But Chen Zhou wouldn't foolishly think that he really only needs to draw some formulas and calculate the data to solve the problem.

Also, it's not his style.

Now that you have joined the research group, you must do your best.

Chen Zhou's current mentality is optimistic and positive, and he doesn't know when he gradually changed his mentality.

After thinking about it, Chen Zhou felt that it was still necessary to make a plan when things piled up as before.

The advantage of this is that on the one hand, you can know the specific progress of each matter, and on the other hand, you can allocate time reasonably.

"Xiaozhou, come and eat!"

"it is good!"

After sorting out the notes made by reading the literature, Chen Zhou got up and walked out of the room.

Zhang Hongying made another sumptuous lunch.

When eating, Chen Zhou only felt that he was eating all the time, but the amount of food in the bowl didn't seem to decrease?
Sure enough, the children at home, in addition to eating fatter, can only eat fatter.

Chen Zhou couldn't help worrying, after this summer vacation, when he went back, would he have a double chin?

After dinner, Zhang Hongying and Chen Jianguo went to work.

Chen Zhou and Chen Xiao took on the tasks of cleaning the dishes and washing the dishes respectively.

"Brother, I'm not very good at a question, can you explain it to me later?" Chen Xiao, who was washing the dishes, said to Chen Zhou aloud.

Chen Zhou nodded: "Okay, is that the book you spread out?"

Chen Xiao: "It's that book, I drew a circle for that question."

"Let me take a look first, after you finish cleaning the dishes, come here."

"it is good."

Chen Zhou walked to the table, picked up the document that Chen Xiao had spread out on the table, and read it.

On the information, Chen Xiao circled the question with a red pen.

A proof question, the title is not long.

[Assume n is a positive integer, a1, a2, ..., an, b1, b2, ..., bn, A, B are all positive real numbers, satisfying ai≤bi, ai≤A, i=1, 2, ..., n, and b1b2···bn/a1a2···an≤B/A. 】

【证明：(b1+1)(b2+1)···(bn+1)/(a1+1)(a2+1)···(an+1)≤(B+1)/(A+1)。】

After reading the topic, Chen Zhou already had an idea.

After reading the question again, Chen Zhou smiled softly. This question is indeed a bit difficult for Chen Xiao, a prospective high school student who has just graduated from the high school entrance examination.

At this time, Chen Xiao had finished washing the dishes and came over.

He picked up a piece of draft paper on the table and handed it to Chen Zhou: "Brother, I can only solve this problem. Take a look, is the idea in front of you correct?"

Chen Zhou took the draft paper and looked at it.

Well, this kid is not bad, the previous thinking is correct.

It's pretty good to be able to answer this step.

"That's right, the difficulty of this question, if you can count it up to this point, it's already hard to come by. It's even better than high school students, it's amazing!" Chen Zhou naturally won't be stingy with his praise.

Hearing Chen Zhou's praise, Chen Xiao grinned unconsciously.

He is still very useful for his brother's praise.

Chen Zhou naturally also noticed Chen Xiao's appearance, he said with a smile: "Don't be proud. Come, let me help you sort out your thoughts."

After speaking, Chen Zhou picked up the pen and began to write on the draft paper, followed by Chen Xiao's calculations, and continued to write.

Chen Xiao restrained his expression and looked at it seriously.

(End of this chapter)