Black Technology Refresher Manual

LabRoots Physics Academic Webinars.

At nine o'clock in the morning, the virtual classroom opens on time.

Sheng Ming'an went straight to the virtual classroom of 'Chirped Pulse Amplification Technology System', and unexpectedly there were more than 200 people in the classroom, not even 100 people yesterday.

He exited and took a look outside, and the posts related to the virtual classroom of the CPA system were indeed marked with a 'hot' sign.

The virtual classroom webinar is basically a debate between the speaker and the onlookers. The onlookers can only post barrage comments, and the barrage comments jump too fast and have a word limit, making it difficult to start discussions among the onlookers in the classroom. Therefore, every virtual Classes are posted outside.

Anyone can enter the thread to ask questions or solve problems.

In the post, someone also posted yesterday's screen recording, not only with text, but also with video as an aid.

The top [-] buildings in the virtual classroom of the CPA system are basically chatting, and it can be seen that neither the posters nor the replyers have any desire for in-depth discussions.

Until the appearance of Harmon and Joey, who proposed OPCPA, not only triggered heated discussions in the virtual classroom and lively scenes of many people and groups arguing on stage but were convinced, but also drove the enthusiasm of discussion posts, directly building more than 2000 buildings in one night.

Sheng Ming'an skipped to the last page. Due to the different time differences in countries around the world, there are people posting and building buildings at every time point.

Floor 2345: [No one can refute Harmon and Joey's OPCPA plan! ]

Building 2346: [I calculated all night, trying to find out the flaws in their plan from the two aspects of physical model and mathematical model-but I have to admit that their plan is damn rigorous from beginning to end! ]

Building 2347: [After all, he is a doctor of UA Optics. ]

……

Building 2448: [Everyone is so sincere.It is just a seminar organized by the platform itself. There is no bonus, no SCI, and no Nobel Prize. ]

Building 2449: [To answer the question above, do you know how many young physicists around the world participated in this seminar?Do you know how many physics discoveries are inspired by physics conferences? ]

……

Building 2480: [As far as I know, a student from the UA School of Optical Science broke the news that his professor secretly watched the seminar.You have to know that the UA School of Optics has produced four Nobel Prizes in Physics. ]

Building 2481: [Let us guess, is it possible that the professor is a Nobel laureate (dog head). ]

Floor 2482: [Regardless of whether there is a Nobel laureate or not, the academic and scientific media will basically give this seminar a look. Although they will not spend a lot of time reporting, paying attention to young scholars is also a long-term investment! ]

Floor 2483: [Maybe one day a Nobel Prize or a Wolf Prize will fly out, soar up with LRs! ]

Building 2483: [But you have to admit that this year's LRs have no interesting results in astrophysics, condensed matter physics, or atomic and molecular physics. ]

……

Around eight o'clock, the discussion on the post became active again, with people actively speaking every minute.

Sheng Mingan withdrew and entered the virtual classroom. The first group of young scholars who challenged the Harmon and Joy program were graduate students from the University of Melbourne, Australia.

The group consisted of three people, two men and one woman.

They were bowing their heads and whispering, two of them were calculating, and the third was using their companion's calculations to temporarily build a digital or physical model to prove whether Harmon and Joey's plan was accurate.

The Arabic numerals in the lower right corner of the display jumped in an orderly manner, and the three graduate students from Tuao showed dignified expressions visible to the naked eye, and two of them looked at the girl who was building the OPCPA physical model.

The girl shook her head.

The other two boys looked up and asked: "When CPA calculates the physical model, you use the nonlinear Schrödinger equation combined with the rate equation, but how to solve the two equations and the gain coefficient equation in the nonlinear Schrödinger equation?"

As he wrote, Harmon said: "The three equations are solved using the distributed Fourier algorithm and the fourth-order Runge-Kutta algorithm, but the transmission dispersion needs to be ignored in the calculation process."

The graduate students from Tu and Australia glanced at each other, praised 'great' and went offline at the same time.

Comments: [It means to carry out numerical simulation research on optical parameters, and use distributed Fourier algorithm combined with fourth-order Runge-Kutta algorithm when dealing with beam quality and signal-to-noise ratio numerical simulation... Awesome! ]

[It has to be said that the level is very high.Worthy of being a PhD in Optics from UA. ]

[! !Do you all understand? ]

[Okay, I'm out of place. ]

[My friend, you are not alone. ]

[Not every young scholar is a top student, and some people just come in and copy inspiration to prepare their graduation thesis [狗头]. ]

[I thought I could copy the inspiration for my graduation thesis, but I didn't expect to be rubbed on the ground in the end. ]

[I feel that my four-year college career + one-year graduate student is a waste of life. ]

[Study all the graduate credits in one year, you are already a master, okay? [tears]. ]

Sheng Mingan took a sip of black coffee to refresh his mind, stretched out his index finger and pressed the Enter key, successfully applying to participate in the questioning party.

When the Enter key is pressed, the signal is transmitted to the platform system.

The system quickly announced his name on the bulletin board of the virtual classroom.

Hassan and Joey, online netizens who thought that no one came to the stage to question and would be respectfully invited offline by the platform, subconsciously looked up at the blank profile picture named An.

Online netizens can't wait to click on his profile.

[Oh! ]

[…?Department of Radar Engineering? ]

[Summary: Some time ago, An, who launched the radar simulation modeling challenge and defeated the genius Blake, is a student of the Department of Radar Engineering, and plans to question the scientific research plan of the Department of Physical Optics in the field of strong lasers. ]

[Very arrogant. ]

[I can't help but watch this good show. ]

Joey asked, "Are you alone?"

Sheng Mingan adjusted the camera at this time, and after thinking about it, he put on a mask and a hat, and then turned on the camera and responded: "Yes."

Online netizens called heroes directly, and some people went to the forum to follow up and report in real time.

Because people in the academic circle questioned it quite sharply, asking every minute to make people feel embarrassed, and embarrassing to the point of burying themselves on the spot, so raising doubts in academic seminars is almost equivalent to "kicking the hall".

'Kick the Pavilion' is definitely tit for tat!Literal guns, tongue flying, must be full of gunpowder smoke!

May I ask who doesn't like to watch other people fight?

Even dogs like to squat on the wall to peek at the couple quarreling next door, let alone human beings who are naturally eat melons!

Then there was a Huaguo student from the Department of Radar Engineering who challenged the doctoral student of the UA School of Optics, which is known for being the strongest optical surface. This attitude was so arrogant that people wanted to slap him in the face.

Therefore, it quickly attracted a vote of online netizens who were interested in the CPA virtual classroom.

In just 10 minutes, the number of online netizens in the CPA virtual classroom reached 700.

And that number is still rising.

There are even more good-natured people who went to the radar board next door to post a post calling on the radar students who were abused by An to doubt their lives in the past to watch the excitement, and the number of people in the virtual classroom quickly exceeded a thousand.

There was a momentary freeze in the virtual classroom with thousands of people online at the same time, but fortunately it was resolved quickly, and the capacity was expanded to accommodate 5 people watching online at the same time.

As I said before, the LRs Physics Symposium is a place where young physicists from all over the world gather and discuss, so several media dedicated to science channels pay attention to the LRs Symposium.

Bob, the regular editor in charge of periodical and video editing of the Discovery Science Channel in the United States, is one of the media.

When Bob saw the forum post, he was not really interested, because he thought the gap between the two sides was so great that there was no suspense in the result. The ones who really deserve attention are Hassan and Joey, PhD students of UA Optics.

So he entered the virtual classroom and prepared to record the screen. During the process, he left the computer desk and went outside to get a pizza.

Jin Demin is a senior student in the Department of Journalism of Hong Kong Baptist University. He will graduate next year and start preparing his graduation thesis in November. Others choose relatively simple topics, but unfortunately he chose the topic of "Physical Science for Young People".

'Physical Science for Young People'

This whole proposition is too broad, not to mention that everyone knows that physics after the 21st century has almost stagnated, so where are the young physicists? !

Kim Deok-min, who almost lost his hair because he was looking for material, was recommended LRs by a friend. He happened to meet a physics academic seminar and saw that post. He felt it was a good material sensitively.

So he entered the virtual classroom, pieced together the ins and outs from the flashing barrage, and instinctively felt that the Huaguo students were going to lose.

Jin Demin started the screen recording.

No matter what the online netizens think, the questioning in the classroom has already begun——

However, in the video window named 'An', a boy from Huaguo wearing a mask and a peaked cap appeared, his face covered so that he could not see anything. The background should be his own home, and the camera was placed cleverly without revealing too much privacy.

There is also a computer on his right hand, and there are many professional books on the desk that make netizens feel 'friendly'.

On the left hand side is a thick draft book, and ballpoint pens are neatly placed on the side.

The background of Harmon and Joey's window video is moon white, they should be in the laboratory, the two of them did not cover their faces, typical American looks.

Sheng Ming'an: "Why can the dispersion effect be ignored for the OPA module in the three-dimensional OPACPA transmission amplification physical model?"

Hassan: "When the signal light pulse is broadened to the order of nm, it can be ignored."

This should be regarded as a basic problem for physicists who have done similar calculations, but because of this, Hassan and Joey judged that Sheng Mingan's actual level is not very good.

Online netizens also have real masters, so they are enthusiastic about science popularization.

Everyone realized that it was really half-bottled water clinking!

Blake was also an onlooker netizen. For some reason, he felt that An didn't seem to have revealed his true level.

After all, he was once pressed and rubbed on the ground, and he also knew that Sheng Ming'an's real identity was just a high school student, especially Blake knew that Sheng Ming'an's learning ability was terrible!

Sure enough, Sheng Mingan's next question became more and more acute, pointing directly at the fuzzy data processing of Hassan's OPCPA plan, down to a certain data that was too small to be ignored, and the experimental process of Hassan and Joey Issues that have not been noticed.

At first, Sheng Mingan asked while flipping through the draft, and based on the temporary calculation of the other party's answer, he seemed like a rookie.

But Hassan and Joey answered calmly at the beginning, thinking that they could solve it in ten minutes, but they didn't expect it to be more and more difficult for them to answer.

Online netizens gradually fell silent.

"The last question." Sheng Ming'an finished the calculation at this time, stopped writing, raised his eyes sharply: "The problem of filling print drop caused by the spatial non-uniformity of amplifier gain, the amplitude and phase modulation distortion of OPA signal light, OPA and ND: The problem of effective matching of glass amplification chains."

After a pause of two seconds, he added: "Wait."

[......]

"..."

Joey: "Is this a question?"

Sheng Mingan blinked: "Anyway, they are all problems, is there a difference?"

Joey and Hassan looked at each other, and they both saw embarrassment and confusion in each other's eyes, because the question raised by Sheng Ming'an was indeed a problem that they had not resolved.

Otherwise, this plan to manufacture 110PW lasers based on OPCPA technology would have been published as a paper, and it would be impossible to bring it up to the LRs academic seminar.

Joey and Hassan whispered to each other, frowning from time to time, showing embarrassment.

Online netizens: [It’s not what I thought it was…]

[UA PhD student's proposal refuted by a radar engineering student? ]

[Is God waking up feeling bad so he made a joke to tease me? ]

[This is not a mature plan (Shanshou), but An Neng noticed these problems, which shows that he is really powerful.In other words, he is really a student of the radar engineering department? ]

[......]

Netizens from the radar engineering department and optics department didn't want to answer this question, because no matter which department Sheng Mingan belonged to, it would be a great harm to them.

The situation was deadlocked for half an hour. Hassan and Joey stuttered to respond to doubts, but their shortcomings were pointed out sharply. Finally, one minute before the intermission at 12 o'clock, they both admitted that the plan was immature.

[! ! ! ]

[Awesome God! ]

[I began to wonder what Ann's specialty was. ]

[So can I still use OPCPA for my thesis? ]

[Who said no?As long as you ensure that the physical model and digital model can be established, the data will not be wrong.In fact, Hassan and Joy's proposal is enough for an SCI paper. If they can solve the problem raised by An, maybe they can really manufacture a 5PW class ultrashort and ultrafast laser. ]

[What about 10PW? ]

[You're thinking about farting. ]

The Great God is also a little irritable.

[Those problems, can Ann solve them? ]

When someone asked this question, it meant that deep down in his heart he had recognized that Sheng Mingan was no less than a doctor of optics at UA, and of course some people jumped out to object.

Some people think that with Huaguo's backward science and technology education, it is impossible for Huaguo students to be better than UA doctoral students with the strongest optical surface, and some people simply think that An is not that good because the questions he asked at the beginning were too simple.

They said: [In the process of raising questions and solving puzzles, Ann got to know Hassan's plan step by step, and raised questions again.In other words, Ann is not an optics boss! ]

[He just absorbs knowledge too fast! ]

[Feel like being smashed into the heart by some invisible thing? ]

[Thanks, felt insulted :). ]

[......]

Sheng Mingan stared at the re-recorded draft with more complete data, and the OPCPA model established by Hassan and Joey quickly flashed in his mind, the silver-white Fourier formula, nonlinear coupled wave equation... …

Those tiny Arabic numerals, difficult-to-write but beautifully shaped Greek letters, plus and minus symbols for equations... the symbols representing the influence coefficients of each component module of the ultra-short and ultra-fast laser, under the rigorous physical formula, gradually extend the silver-white line.

Line combination, interlacing, vertical and horizontal... form one physical model block after another!

Finally, numerical simulation is performed on these physical model blocks in the system to obtain the final result of whether the scheme is feasible.

All the steps were completed in my mind. After the silver-white light was over, it gradually went out and dimmed. When there was only the last bit of starlight left, it suddenly burst into a bright light to defeat the enemy faster, faster, more intensively and accurately. The potential to re-expand and synthesize a new physical model!

'Ding dong', the virtual classroom reminds that twelve o'clock is coming, and it will be closed until 02:30.

Online friends are quitting.

Exit time reminder: 1, 2, 3...

Sheng Mingan raised his head and said to the camera, "I can solve those problems."

4, 5.

The virtual classroom is closed, and all online netizens are forced to quit.

[......]

[Fuck, did you hear what An said just now! ! ]

CPA virtual classroom forum posts are like water into hot oil, boiling hot instantly.

[Calm down.My mentality is already Buddha.Honest words from a radar engineering student. ]

[Ah.This kind of feeling of being bullied by the great god over and over again, and feeling like a waste every day, we have already experienced it two months ago. ]

Scholars majoring in radar engineering speak in this post like a worldly expert who sees through the world.

Seeing this scene, the young scholars in the Department of Optics felt a little complicated. They felt sorry for their traumatized hearts, but also felt a little proud inside and out of their words.

[I'm going to review the OPCPA models of the big guys, and I'm going to grab the front row at three o'clock in the afternoon. ]

Bob frowned, and his interest was raised, "Perhaps this 'young scholar' in Huaguo mistakenly thought that he had glimpsed the answer to the puzzle."

Jin Demin felt very excited. Although he couldn't understand, the "cool" and "amazing" written in English in the forum made him even a Chinese.

So he geared up and waited for the virtual class at [-] p.m.

***

Sheng Ming'an, who grasped that ray of inspiration, wished he could divide it into five or ten to use by himself. He wrote like a fly, and the writing speed couldn't even keep up with the calculations in his mind!

The hour hand turned round and round, and finally settled on the Arabic numeral '3'.

It was three o'clock in the afternoon.

The computer that was not turned off suddenly rang, waking up Sheng Mingan who was writing a book. He looked up, remembered that the virtual classroom was open, and clicked in. He saw the dense comments and more than 2000 people in the lower left corner.

It was only over 1000 in the morning, and it soared to over 2000 in the afternoon?

Sheng Mingan was surprised for a moment, and explained in English: "Still calculating. Wait a moment."

After saying that, he buried his head and continued.

Online netizens couldn't see his calculation process, and felt a little anxious, but they didn't bother, because they knew that a flash of inspiration was extremely precious to scientific researchers!

Sheng Ming'an is still calculating, and online netizens and people in forum posts are also discussing fiercely.

Time passed by every minute and every second, the virtual classroom was closed and opened again, day turned into night, the lights of the city were lit up, the bell rang when the hour hand pointed to '9', and Sheng Mingan put down his pen.

Take a deep breath and exhale.

"ended."

"Based on the scheme proposed by Hassan and Joy to obtain the physical model of high-power laser output based on beam deflection and scanning bandwidth OPCPA, solve the problems of amplifier and OPA signal light that I raised in the morning."

"Now, welcome to ask questions."

As soon as the voice fell, the first group immediately appeared on the system bulletin board to question: "How to reduce the gain within a certain value?"

Sheng Ming'an: "Remove ND:glass. There is a corresponding formula for the gain value and ND:glass."

Then came the second group, the third group...

"Solution to grating damage problem?", "Excuse me about the spatial self-focus effect..."

Talking all over the place, endlessly.

The questioning session lasted until eleven o'clock in the middle of the night, and Sheng Mingan answered all the doubts, the whole process was unhurried, clear and meaningful.

Barrage comments have stagnated. Young scholars who study lasers from various optical departments around the world outside the forum are writing books at their desks, or discovering new problems and excitedly asking questions, or marveling at Sheng Mingan's cautious thinking and rigorous thinking. algorithm.

In the CPA post, young scholars had heated discussions.

In the end, all the heated discussions were quiet, as silent as dust moving along a fixed trajectory in the air.

After the silence, there was applause.

It's a pity that the applause could not be heard, otherwise Sheng Ming'an would have heard thunderous applause from the heartfelt respect and cheers of young scholars from all over the world who watched this wonderful scientific model building.

Bob, who had been on the sidelines all day, turned from contempt to admiration: "Wonderful!"

He flipped through the screen recordings, regretting that Ann's personal information is too little, and his current achievements are actually not enough to be featured on the Science Discovery Channel and Science Weekly.

However, it may be possible to give a three-sentence introduction in the forum for young physicists.

No way, who made An not have better scientific research results.

The Science Discovery Channel usually only leads the LRs Physicist Symposium in one sentence, and it is impossible to give too much space.

Bob paid attention to the seminar because they were casting a wide net.

If any young scholar who has been paid attention to wins a world-class physics award in the future, then he is the first to report that he is the Bole who discovered the genius!

Jin Demin was emotional. For some reason, he felt that Sheng Ming'an, who was surrounded by countless questions but responded calmly, was like a knight who broke through the siege, using knowledge as a sharp edge, lifting it high and falling lightly, but no one dared to question the weight of it .

He decided to take An as the protagonist of his graduation thesis, and deeply analyze the young scientific research scholars in Huaguo!

But before that, Jin Demin can't wait to share today's exciting scene with you!

He edited and recorded the screen overnight, accompanied by intense and passionate bgm, edited a video that is no less than a heroic blockbuster, and put it on YouTube with full expectations, but the click-through rate was mediocre, and he was ridiculed for acting.

Because of well-known reasons, Huaguo has no Nobel laureate cultivated by his nationality so far. Although there are many papers, there are only a handful of physicists in his country who have won world-class physics awards.

So not many people believe that the young physicist of Huaguo can be better than the doctor of optics of UA, and some people on Youtube attack him for deliberately editing and disordering for the so-called narrow nationalism.

Jin Demin was very frustrated by this, hesitated again and again, and finally kept the video without deleting it.

But he didn't know that someone in the country saw his video, and he felt very excited, so he put the watermark of Jin Demin's YouTube account name and moved it to Station L, the sacred place of the two thorns in China.

Of course, it was assigned by the system to a relatively unpopular technology channel at first, and the viewing popularity counted in double digits.

***

Sheng Mingan's hands trembled violently, which was a sign of overwork.

After the virtual class, Hassan and Joy tapped him in the background: [Are you going to write your thesis?We would like to cite the results of your calculations. ]

With Sheng Mingan's calculation, they can write a more complete paper.

Sheng Mingan half closed his eyes, and typed: [OK. ]

Hassan and Joey thank you immediately.

Sheng Mingan's calculation results can be written as an SCI alone, but Hassan and Joey have to mark it if they want to quote it, and they don't worry about being preempted by others.

Because there is a screen recording as evidence.

Sheng Mingan was so hungry that his stomach cramped, his mouth was dry, his voice was hoarse, his whole body was weak, and his nose was a little sore. It was a natural physiological reaction of being too hungry, and he felt inexplicably wronged.

It seemed that he was unreasonably blaming himself for being so hungry!

After sitting on the chair for a few minutes and regaining some strength, Sheng Mingan went downstairs to look for food. He opened the refrigerator, expecting to see only milk and bread, but unexpectedly there were two plates of meat and vegetables wrapped in plastic wrap inside. meal.

The things made by the maid at home never stay overnight, these are...?

Sheng Ming'an picked up the post-it note that was pasted next to it. On it was written in Chen Jingqiu's strong handwriting: "Meals left for you."Serve hot and ready to eat. '

"Chen Jingqiu..." Sheng Mingan was pinching the post-it note, his face was expressionless, and he was as angry as a gossip.

The system is now online: the host won't be moved, right?

Sheng Mingan frowned: "So there are some attributes of a wife?"

system:【……】

The system's persuasion was swallowed silently, and he disappeared without a sound.

The author has something to say: An Zai (plausible): I love growing flowers and cooking soup with my grandfather, what is it if it’s not a wife? !

Chen Gou, in fact, has some literary talents in his bones.