Black Technology Refresher Manual

The relatively well-known sections of the LabRoots forum are scientific research and medicine, and the radar engineering section is not particularly lively. As the system said, the possibility of encountering a boss is less than 1%.

However, scholars majoring in radar engineering from all over the world will still come to take a look. There are dozens or even hundreds of technical exchange posts published every day, but the posts that can attract others to leave and leave comments are either excellent in technical theory or particularly interesting.

Today, many people refreshed the forum as usual, but saw a slogan scrolling on the advertisement column of the homepage: [6-hour challenge for SAR ground detection performance simulation modeling!Those who are capable will fight! 】

The words are quite arrogant and pretentious. Look at the subtext of 'capable people' = 'trash out', 'come to fight' = 'you must lose badly', and challenge a simulation modeling that requires at least teamwork. At least more than 24 hours, most people would not think of setting a time limit.

Good guy, your tone is so arrogant that you directly limit the time to 6 hours!

What can you do for 6 hours?

Just enough to build a prototype of the structure of the idea!There is no time to simulate modeling and testing on the machine, and there are still a lot of complex values ​​that need to be calculated during the simulation process!

Arrogant, too arrogant!

The arrogance makes people's blood boil, and I can't wait to sneak in and occupy a good position to see how the post owner gets slapped in the face!

Users from all over the world can see the scrollbar because it appears on the homepage and not on the inner pages of the radar section.And because the language of the scroll bar is too arrogant, countless people became interested in it by coincidence, so they clicked in to watch it.

It wasn't until they entered the challenge post that they realized that they were too naive just now.

Restrictions for the challenge post: 6 hours, 1 person, online live broadcast throughout, and virtual classroom open to the public.

To sum up, the post owner invites others to challenge the simulation modeling of SAR ground detection performance within 1 hours, and compete 6 on 1.The requirements are both fast and accurate, and the whole process is open to the outside world to prevent the possibility of cheating.

You must know that LabRoots has never had a precedent for a challenge post, this person... is a newly registered account!

A newcomer sets a precedent and writes a challenge book as soon as he arrives? !

...It's too pretentious!

Such good things must be seen!

So this challenge post quickly became popular, and spread in the radar engineering circle like a virus, and at the same time broke the barriers and spread to other scientific research circles.The maximum number of people that can be accommodated in the virtual classroom live broadcast is 1500, and the number of people will soon be crowded, and someone will re-open the post outside to plan to broadcast the whole process.

Blake is an undergraduate graduate student at UCLA, majoring in electromagnetics in the direction of electromagnetic waves, mainly researching and studying military radar.

In fact, he seldom goes to LabRoots. He usually hangs out in niche forums belonging to the radar professional field. Challenge posts on the home page.

Blake finds it very interesting. SAR ground detection performance simulation modeling is not difficult for him at all, but the 6-hour limit is still a bit challenging.

He thought it was boring anyway, so he simply clicked on the personal information of the post owner: name an, new account number, from Huaguojin City, other than that it was blank, without school information, tutor and resume.

Chinese people?

As we all know, Huaguo lags behind the United States in the field of science and technology for more than ten or 20 years, but in recent years, Huaguo has made great achievements in radar engineering.There are still gaps, but the results are impressive.

Maybe this Chinese man can give him some surprises.

Thinking so, Blake replied: [I accept your challenge to Ann. ]

As soon as the reply came out, the onlookers were boiling.

[Blake?Genius in electromagnetism at UC!Shouldn't he be busy preparing phased array anti-missile early warning radar papers?Congress and the Army loved him. ]

[Fuck!What's up with the Army?Phased array anti-missile early warning radar is one of the main research directions of military radar at present! ]

[The grapevine said that the Army Research Laboratory's radar field hopes that Blake will join the job after graduation. ]

[Kneeling!I just looked at his academic qualifications, he has just entered graduate school... There are also great gods haunting this corner of the North Pole! ]

[What misunderstanding do you have about one of the five largest scientific research exchange forums in the world? ]

[It's not my mother, but I love the newcomers who posted, and they kicked the iron plate within 3 minutes of being crazy. ]

[love +1]

[Same pity. ]

[......]

[Although I love you, I like to hear and see them, I like to watch the great gods rubbing and pretending to be monsters! ]

[same. ]

[expect. ]

[Same expectation. ]

Zhao Da came to the FabRoots forum just like playing games and doing daily tasks. After browsing it a few times, he felt that he hadn't gained anything. He was about to quit, but a prompt message that the virtual platform was open suddenly popped up.

There was nothing left to do, so he clicked in. Just in time to see the intense discussion, he suddenly became curious. After he understood the cause and effect, he remained silent for a long time, and piously lit the candle for the man who sent the challenge letter.

"You're so young, why are you pretending to be so cool?"

Although the result was 90.00% without any suspense, Zhao Da still held back the sympathy in his heart and read on. After all, electromagnetism is one of the most powerful majors in California, and being able to be selected by the US Army Research Laboratory shows that Blake It's tough.

It is a good opportunity to learn to see the master's layout and problem-solving ideas.

After the challenge post was published, Sheng Mingan thought that it would be difficult to meet opponents in a short time with his newly registered rookie account. He forgot that LabRoots did not have the tradition of posting challenge posts at this time.

Sheng Mingan went downstairs to eat dinner, do warm-up exercises, took a bath, and treated the red sores on his face according to the doctor's orders. By the way, he found a private investigator to investigate Chen Jingqiu's experience from childhood to adulthood.

System bubbling: [I thought the host had long forgotten the existence of Chen Jingqiu. 】

"How?" In fact, I really forgot.

"You see, don't I think of him in my free time?"

system:【……】

Sheng Ming'an: "When I get more information about Chen Jingqiu and get to know him better, I can work out how to prevent him from becoming a devil. Speaking of which, do you know how Chen Jingqiu spent his youth?"

System: [I don't know.I'm sorry, host, before Chen Jingqiu became famous, he completely destroyed his past experience.Later teams searched for clues from the vast sea of ​​paper documents, but the information they could get was very limited. 】

"It's still up to me to find the detective." Sheng Mingan stretched back to his room, habitually checked the computer webpage and email information, and happened to see a small speaker vibrating in the lower right corner.

I clicked in and took a look, and it turned out that the challenge post was posted by someone!

Blake: [Are you still there?When does the game begin? ]

Sheng Ming'an: [It starts at 9 o'clock. ]

He glanced at where Blake was, and there was a 12-hour time difference between the two countries.He is now at 8:8 in the evening, and Blake's side is at [-]:[-] in the morning. There is no problem with the time, but it is the difference between morning and evening.

Blake: [OK. ]

After confirming the time, Sheng Mingan went downstairs to bring back two pieces of brushed bread, a large cup of black coffee and a mask, and returned to the computer desk to adjust the camera, sound and various equipment and software needed to ensure that there would be no failure in the middle question.

Then put on a mask and wait for the time to reach 9 o'clock.

--arrive!

Sheng Mingan immediately turned on the camera, and Blake, who was opposite him, also turned on the camera at the same time, and his handsome face with blond hair and brown eyes appeared in front of the computer screen.

The two sides looked at each other without communicating, but they both pointed the camera at the computer tacitly.Because today's protagonists are not them, but the whole process of live broadcast of SAR ground detection effectiveness simulation modeling.

The game officially begins!

The onlookers discussed excitedly, all of them are more optimistic about Blake.

They began to comment when the two started simulation modeling: [Although the initial simulation process is the same, Blake is obviously easier.He easily faced the camera and expressed his idea of ​​simulation modeling, and soon entered the solution of each coordinate of the SAR ground detection area model. soon. ]

[Let’s look at Ann on the other hand. To be honest, we are very strange to Ann, completely unfamiliar.I don't know his train of thought, his level, and he's also very quiet, unlike Blake who has started to talk about his modeling train of thought, luckily I can see—]

[Obviously, Ann hasn't touched the keyboard yet, he's still building ideas. ]

[Ann is already behind Blake. ]

While solving the model coordinates, Blake looked up at the blank screen in the upper right corner, and couldn't help frowning. Although the construction of simulation modeling ideas runs through the whole process, it is not the most difficult part. It can even be said that everyone who studies radar engineering Everyone should have a basic quality of thinking about how to build immediately when they see the topic.

Could it be that the Chinese who challenged him had no real skills?

Sheng Ming'an, who has been speculated by many parties, is indeed building the idea of ​​simulation modeling. He is used to rehearsing the whole process of simulation modeling in his mind, and he is meticulous about every step that is prone to errors and mistakes. Next step.

When planning a building, he needs to control every process and every detail of the building from top to bottom, from the inside to the outside, from solid foundations to reinforced mud columns, to internal structures such as beams and areas For planning, if others know that Sheng Mingan actually constructs his ideas in this way, they will definitely scoff at him and laugh at him for being too arrogant.

It should be noted that the memory and storage capacity of the human brain are limited. When designing any project, especially a sophisticated project, not only the cooperation of multiple people is required, but also supercomputer-assisted calculation and storage are required.

It is impossible for a person to complete a project without the help of external aids, even if he is a genius!

Of course, it's not that Sheng Ming'an doesn't need external aids, he just did a few more steps than ordinary people and shared the work that should be a computer.

Although it takes more time to do so, it also allows Sheng Mingan to work faster and make fewer mistakes, because he has already stored a three-dimensional modeling diagram in his mind.

[Ann is still thinking, his speed is too slow. ]

[There is no suspense in this game. ]

[I thought there would be surprises... Forget it, I'd better look at the modeling ideas of the great master. ]

Onlookers gradually lost interest in Sheng Ming'an's side and turned to Blake.The prototype of Blake's modeling has already appeared on the screen, and his simulation modeling is very skilled in terms of speed and thinking.

It is worthy of being the master of California's radar direction!

In fact, the evaluations of the netizens are not unreasonable. Sheng Mingan's knowledge of radar engineering and simulation modeling are not as good as Blake's!

Sheng Mingan took a deep breath, exhaled, moved his eyeballs, placed his ten fingers on the keyboard, and said to the earphone: "Take a simulation example: take the 'lacrosse' parameters of the working L-band as an example. At a certain moment, the coordinates are (25,18,700, 700000) km, its orbital height H=5m, its transmit power P(t)=30KW,...pulse width P(w)=60um,...radar incident angle=[-], and it is assumed that the jammer and SAR have the same Range' bandwidth and Doppler bandwidth."

The calm and cool voice mixed with the "click" sound when typing on the keyboard constituted the prelude to a battle song. Sheng Mingan completely ignored the pressure of Blake's big step ahead and the boos of netizens, with a peaceful mind, a calm mind, and a calm mind. The simulation modeling starts clearly.

The first is the SAR ground detection area model. In the blank part of the software center, a spherical body jumps out first, and then the space Cartesian coordinates are drawn with the center of the sphere as the origin, and the coordinates in the simulation example are substituted into the model to obtain the current SAR coordinates (x , y, z)...Set P as the center point of SAR ground detection (required point coordinates).

"Find the coordinates of point P. First perform coordinate transformation, and rotate the coordinate system around the Z axis by h degrees." Sheng Mingan laid down the matrix obtained during the rotation process, and substituted all the above-mentioned equations into the equation to obtain the final result. Immediately after that, substitute the exact value to obtain the value of the desired coordinate.

The last step can be calculated in the software, Sheng Mingan didn't bother to type it in, so he just wrote down the result.

A small group of netizens were about to leave, but they couldn't help but stop and continue watching when they saw him start to solve the problems. There were also netizens posting live broadcasts outside, and at the same time live broadcast the group arena match between Sheng Mingan and Blake.

He commented in the post: [Ann started to work... It's quite satisfactory, there are no major problems but not brilliant, the speed is a little faster than ordinary radar engineering students, not the level of a great god. ]

[Still not as good as Blake.Blake's speed is so fast, he's halfway through the derivation of the mathematical model, I bet he will be able to build the mathematical model by the time 11 o'clock comes! ]

[As for Ann, maybe he can finish building the math model by 1:[-]. ]

Zhao Da was also watching, and his opinion was the same as that of most people.

It is now 10 o'clock, and Sheng Ming'an has just started to solve the coordinates of the center point of the SAR ground detection. Next, there will be derivation and establishment of the mathematical model. Effective cover model.

This part is really technically difficult.

Sure enough, Blake completed all the SAR ground detection area models and a small part of the jammer cover model before 12:[-], while Sheng Mingan was still building the ground detection mathematical model.

Half of the time has passed, unless Sheng Mingan suddenly speeds up and overtakes, the outcome is already decided!

After watching for three hours, many people have already started to feel tired, and the number of comments has decreased, but it is strange that not many people left. Perhaps they felt that Sheng Mingan continued so calmly and methodically when the outcome was already decided. Let them empathize.

Because radar engineering is so boring.

In fact, whether it is radar engineering or other scientific research majors, they are equally boring and complex, and spending dozens of hours a day may not necessarily result in satisfactory results.

The process will keep 'error', 'error', 'error'!What's even more frightening is that you don't know where the 'error' is at all!

It's just crashing!

[Wait - I have an astonishing discovery, I don't know if I should say it or not. ]

[I also—I just wanted to say—]

[There is nothing wrong with the security process! ! ]

[grass!The bitch who stole my words! ]

Zhao Da straightened up, suddenly regained his energy, and stared at Sheng Mingan's live modeling process with all his attention. After staring at Sheng Mingan for more than ten minutes, he finally swallowed his saliva in horror and shouted: "Fuck! Fuck!"

"What is the concept of not making mistakes in the whole process?"

Zero mistakes!

Even Blake made a mistake in the calculation process and had to overturn and re-model, while Sheng Mingan was slow, but did not make a mistake!

[nonsense!At such a slow speed, I can't go wrong with it! ]

[What's wrong with being fast and inevitably making mistakes?What's wrong with being slow and having time to think so you don't make mistakes? ]

[It looks like you are not a radar engineering major. You have to learn how to use equations, and you have to have a rough three-dimensional map of radar work in your mind, and then you have to consider various interference waves that appear in the process and find them. come out.Is it possible that nothing went wrong during this massive build? ]

[Any scientific research results must be obtained through countless mistakes. ]

[What's the use of that?Halfway through the time, Blake had a big lead. ]

[Didn't you find out?Ann's speed is increasing!For some calculations, he skipped them directly, or gave them directly, which is faster than computer calculations! ]

As soon as this remark came out, it immediately attracted a large wave of netizens to watch.

The live broadcast, which was originally stagnant, suddenly seemed like boiling hot water. The comment area quickly came to life, and someone had already started recording the whole process, and planned to transfer it to YouTube at that time.

Zhao Da couldn't help recording the screen either. He watched the comparison between the two of them the whole time, so he understood the changes in Sheng Mingan's simulation modeling better than others.

——It’s a real acceleration visible to the naked eye!

The first half of the competition was unremarkable, but the second half was full of excitement due to Sheng Mingan's acceleration and zero mistakes. The competition between the two became fierce. The next step is to see who will complete the jammer model first!

The code in the live broadcast jumps rapidly, and the numerically complex equation skips within two or three seconds after the result is obtained. Various models in the software are gradually built up. A wave of comments climaxed.

Sheng Mingan's fingertips paused for a few seconds, and he glanced at the clock.

[Why did it suddenly stop? ]

[1 hour left!I'm so fucking nervous! ]

[So far it's Blake leading the way with a model build! ]

[The result is really no suspense, even speeding up is useless. ]

Taking time to look at the comments, Sheng Mingan chuckled, and said in correct American English: "Friends, have you ever heard of overtaking on a curve?"

[? ? ? ]

[What's the meaning? ]

[Create another path, find an unusual path to victory. ]

[nonsense.I know what it means, and I want to know how he does it. ]

Sheng Mingan's eyes are so black and bright, typing on the keyboard with both hands almost becomes a virtual image, and the models in the software are built, saved, and hidden one by one, just like the extremely cool mechanical disassembly and synthesis in science fiction movies.

His speed is very fast, and his modeling thinking is very jumpy, out of the routine. People who can't keep up with their eyes and thinking can't understand it, but those who can keep up will be amazed!

[I understand! ]

[I understand it too!The result is that Ann wins!But why I won, I will not say. ]

[The devil you? ]

[what are you guys saying?Are we still the same planet and the same species?Why can't I understand the modeling process of the two? ]

[Blake is also accelerating...the speed of both of them is so fast!Without any stagnation, is this the world of genius? ]

[You already admit that Ann is a genius? ]

Using the simulation results of different jammer transmission powers presented by MATLAB, the simulation graphics on the computer light screen flickered too fast!The black-and-white spatial coordinate map shows the change map of different situations when SAR is interfered. For a while, it is a volcanic curve, a radar satellite-shaped curve, and a dense dot pattern for a while...

Ever-changing, but full of charming curve beauty.

That is the beauty that only those who can understand can appreciate it!The beauty of wisdom!Beauty that belongs to the realm of radar and mathematics!

Time passed bit by bit, from no one noticed to the tense moment where every second counts, both the participants in the game and the netizens watching were all immersed in this moment, holding their breath, motionless, clenching their fists, waiting for the final announcement of the winner the result of!

2:53 imperial time, 14:58 Washington time, almost at the same time——

"Run!"

"Torun!"