Black Technology Refresher Manual

Wang Ruo: "Uh...well, should we talk to the director about changing the title?"

Sheng Mingan: "Whatever."

Zhao Da: "Just mention it."

Wang Ruo said "Oh" but didn't move. She was very nervous and kept cheering herself up. The team members Yao Zi and Liu Yingrui next to her understood her nervousness.

The three of them came from the same school. They were originally top students who were valued by teachers and classmates in the school, but they lost their confidence when they participated in the program!

As poor students who were eliminated from the previous program, they went to the director to change the topic, or a more difficult one, unlike Sheng Ming'an who seemed to have real materials, they might be laughed at for not knowing what they could do.

Sheng Mingan was surprised why they didn't move, and was about to say that he should go, but someone took a step faster.

Chen Jingqiu stood up, "I'll tell."

After speaking, he walked towards the director and said a few words, which caused the group of people to roar with laughter.After a while, Chen Jingqiu came back and said that the director agreed with them to change the title. Wang Ruo and the other three immediately worshiped him secretly with their eyes.

Facing ridicule, how could he be so calm? !

There is no expression of shame or anger at all, brother, the psychological quality is really too strong!

Sheng Mingan observed Chen Jingqiu's performance, and suddenly wondered why he became the terrible criminal genius that the system said. He doesn't look cynical or abnormal now. He is just a tough boy with a tough life, ordinary and harmless. .

Li Jiao suddenly smiled and greeted Chen Jingqiu.

When did the two of them become so familiar?Sheng Mingan was a little surprised.

Chen Jingqiu turned around suddenly and met Sheng Mingan's gaze.

Sheng Mingan was stunned for a moment, neither dodging nor avoiding, and nodded at Chen Jingqiu, thinking that he was quite vigilant.

Chen Jingqiu withdrew his gaze and continued to stare at the ground silently.

At this time, the host came to the stage to announce the rules: "The third issue of the program is mainly about mathematical simulation modeling, involving physical radar engineering and informatics. Therefore, the rules of the competition refer to the National College Students Mathematical Contest in Modeling. The competition lasts for three days. Within [-] days, complete the project, do not ask for help from outside, do not cheat, but there is HowNet to provide information assistance, and you are not allowed to leave the arena! If you have to leave the arena urgently, you must be accompanied by the staff on the arena!"

As soon as this rule came out, there was an uproar in the audience.

For high school students who have only participated in the Olympiad, the difficulty of the subject is directly proportional to the strict rules, making them feel strange and tricky.

For the college students who knew the cruelty of the competition, they all felt that the program group was awesome, and they really dared to play. You must know that this competition has always been a competition between the Department of Information and the Department of Mathematics!

The high school contestants were very panicked. They asked the only two college students majoring in radar in the group, and the reply they got was that it was difficult, but they could handle it.

Compared to the panic of the other two groups, Li Jiao's group was very calm because the Great God was in their group.

Li Jiao's team guessed that the subject was modeling, and they were prepared for it, but then found out that it was a completely unfamiliar radar project.

After panicking for a few seconds, they heard Xu Ruodong say that the subject was moderately difficult and he had ideas, and Li Jiao and the others felt at ease. After listening carefully to the whispers of Tianjin university students, they realized that Xu Ruodong is a master of radar!

Why are they panicking with a great god in charge? !

Safe promotion!If nothing else, he must be the champion!

So in the performance of each group that finally appeared in front of the camera, Li Jiao's group was confident, the other two groups were frowning, and the fourth group...huh?Why is it that half of the people are sad and bewildered, while the other half are expressionless and wandering?

What are you doing?Are you here to play?

——The voices of those present.

When the host introduced the group, he deliberately gave Li Jiao's group a lot of shots, and the audience in the museum responded with cheers.

Then it was the turn of the fourth group, which was Sheng Mingan's resurrection group. Originally, he planned to skip a sentence, but the host thought of the assistant director's advice, so after introducing the group, he added a sentence: "Should the fourth The group requested that the program group agreed to replace the original subject with the InSAR deformation monitoring technology based on historical satellite data, please see the prompt on the large screen in the museum—"

Everyone in the museum looked up at the big screen, and the big red font on the electronic screen was the topic corresponding to each group.

Taking the advice of professionals, the program group selects two topics, and every two groups do the same topic.

That is, Li Jiao's group and Sheng Ming'an's group are doing the same subject: [Simulation modeling of phased array radar based on SimulinkRTW records. ], the second group and the third group are doing the same subject: 【Simulation modeling of communication system based on active phased array radar. 】.

There is not much difference between the two difficult topics, but at the next moment, Sheng Mingan's group changed the topic from PAR to InSAR deformation monitoring simulation modeling.

Most people in the museum couldn't understand it, and they all whispered what kind of trick this is.

In the auditorium, Li Jiao's fans boldly asked the Tianjin University students behind him: "Is this deformation monitoring easy?"

The Tianjin University student who was asked immediately replied exaggeratedly: "Easy?! It's hard, let me tell you! How difficult is it? See Xu Dashen in Li Jiao's group in the library? Even he may not be able to do it. Do you think it's easy? ?”

Li Jiao's fans then asked: "Sheng Chou... Uh, is the president of Tianjin University in the resurrection group a great god?"

"There is only one great god. His surname is Xu."

Hearing this, fans whispered to each other: "The rookie team took the initiative to change the more difficult subject, what are you doing?"

"Sheng Chou forced to change the topic, probably because he wanted to show off and steal our little Sunshine's demeanor."

"Ugh! Can he stop being a demon?"

……

In Li Jiao's group, Wan Xu asked Xu Ruodong in astonishment: "What InSAR technology is that difficult?"

Xu Ruodong nodded: "It's difficult. Unless there is a genius I don't know in their group, Zhao Da is definitely not. I know his level."

Li Zhao chuckled, "Is Sheng Mingan crazy?"

Li Jiao pursed his lips, and his eyes fell on Sheng Mingan who was opposite him. He remembered that Sheng Mingan had never had any knowledge about radar engineering before, so he couldn't help wondering what Sheng Mingan's purpose was. Could it be another way to vent his emotional breakdown?

Xu Ruodong: "Leave them alone. We started to assign work, and I was in charge of modeling and project design. Li Jiao, you said you have studied modeling? Okay, you assist me. Xiaoyang, you are responsible for the physical erection and part of the programming, Fang Qingli you If you have also learned programming, then help him. The other two will prepare the actual erection experiment with Xiaoyang later!"

The assignment without pauses arranged the seemingly tricky simulation modeling work in an orderly manner. Everyone in Li Jiao's team had a direction in an instant, and each started to carry out simulation modeling according to the instructions.

The other two groups started slowly, though slowly.

Their performances were presented on the large electronic screen in the museum, as well as the display screen in front of the jury.

In order to show fairness and impartiality, the program group separates the evaluations of each group.

Each professor judged a group, and also invited professors from other departments such as Zhang Qunfang from the Department of Physics, and professors from the Department of Mathematics and the Department of Information as deputy judges.

Xidian Professor Wu Shunde: "This group is okay. What's the name of the leader?"

The deputy judge beside him is Professor Yang from the Department of Information Technology: "Let me see, his name is Xu Ruodong. He took the postgraduate entrance examination in his junior year and received an offer from Xidian in his senior year. Not bad, he is a talented student."

Wu Shunde nodded: "Indeed. The other young students are also good, they are still high school students, so they don't have stage fright."

Professor Yang agreed, saying, "Especially Li Jiao and Fang Qingli, they are good at programming and modeling."

Wu Shunde did not comment too much on this.

The other two groups also began to comment, and the camera turned to the group of Zhang Qunfang and Shen Weiguo, but both of them were very calm.

Pan Wo and Zhang Ping behind the director's monitor quickly understood them. After all, they really didn't know how to comment on such a strange group as Sheng Mingan.

Thinking this way, the camera naturally switched to Sheng Ming'an's group. Pan Wo and Zhang Ping were stunned for a moment. They thought they would see a scene of panic, but they didn't expect...it was pretty decent.

***

The types of radar are diversified, PAR and SAR are two major types of radar respectively.

PAR (phased array radar) is a reform of traditional radar mechanical scanning, which cannot be imaged. SAR is a high-resolution imaging radar that works around the clock and can effectively identify and penetrate camouflage and coverings. It will play a very powerful role in future warfare.

InSAR uses interferometry technology on the basis of traditional SAR imaging. To put it simply, it is to repeatedly image the same position, use the phase difference signal generated during multiple imaging processes to obtain an interferogram, and then calculate the surface through the numerical calculation in the interferogram. Deformation changes.

Although Sheng Ming'an has explained what InSAR is in the simplest language, Wang Ruo's team is still full of expressions of 'who am I', 'where am I', and 'what kind of scum am I'.

On the contrary, Chen Jingqiu, who has always been very quiet, nodded to show that he understood when asked.

Sheng Ming'an: "...For example, if we want to know whether a bridge is safe, we have to monitor whether its internal structure is deformed. InSAR can capture the internal structure imaging map of the bridge, and pass back from different imaging images. By calculating the data, we can understand the internal deformation of the bridge within a few years, and clearly understand the changes at the centimeter and millimeter level, and then judge whether the bridge needs to be repaired, so as to avoid safety accidents."

It has been simplified to the point where it can no longer be simplified. If you still don't understand, Wang Ruo and the others should go back to the stove and rebuild.

Therefore, the three members of Wang Ruo's team nodded and said shyly, "We understand."

"You have never studied radar engineering, so I won't go into too much detail. You just need to understand its principles. Radar simulation modeling involves physics, mathematics and informatics. You are relatively unfamiliar with informatics, but basic physics You all know mathematics and mathematics, so you can help me." Sheng Mingan took back the draft book and wrote calculations on it: "I will be responsible for the calculation, and I have to start the calculation from scratch. The rest needs some actual data for assistance. I'll do the simulation modeling, and Zhao Da will do the physical erection."

After a pause, Sheng Mingan raised his head and asked Zhao Da: "Is it okay?"

Zhao Da was a little awkward at first, because he, a radar engineering graduate student, actually wants to help a high school student, which is really ironic!But when he heard Sheng Ming'an talk about radar professional knowledge clearly and clearly, and saw that the knowledge in his draft book was very profound, he had to be convinced.

So he replied, "I'm fine."

"There is also a very important point. In the next three days, we don't have much rest time, and we have to hurry up, because our difficulty is more than a hundred times that of others. And I can almost say that we stayed overnight for two consecutive days. Definitely needs sleep. So this part of the process, I hope you can catch up."

"You guys, can you do it?"

Infected by his calmness and courage, Zhao Da and the others were eager to try, and nodded heavily: "OK!"

"Okay." Sheng Mingan closed the draft book: "Then let's start."

"Zhao Da, you take Wang Ruo and the others to understand the physical erection equipment, and teach them to complete the basic contract aperture radar physical erection experiment according to the design ideas I gave. Record the measured data and give it to me later."

Zhao Da: "OK." He immediately took Wang Ruo and the others to operate the physical erection equipment.

Sheng Mingan opened the computer file and wrote down the example set up to complete the level: [Take a bridge in Jin City as an example to monitor the deformation of the bridge body and surrounding areas after the completion of the reinforcement and expansion plan. The length and area of ​​the bridge body are respectively... The total area of ​​the surrounding area is... First, use the PSInSAR algorithm to make a geometric model of the InSAR deformation monitoring technology. 】

"Chen Jingqiu."

Standing behind Sheng Ming'an, Chen Jingqiu watched his simulation process quietly, and calmly accepted the fact that he was not assigned a task, or was excluded.

Then use this opportunity to greedily absorb knowledge, regardless of whether it is good or bad, whether you understand it or not, and swallow it like a hungry person.

Unexpectedly, Sheng Mingan called him suddenly, Chen Jingqiu raised his eyes, and casually guessed what reason he would be dismissed later, or it might be verbal abuse for no reason, but it was a pity that he didn't have time to write down the whole process of the radar algorithm.

"You turn on the computer next to you and find the ENVISARscape software, which is a professional radar image processing software. We can use it to output various data such as images, digital elevation models, and surface deformation maps."

"—?" Chen Jingqiu was a little dazed by the unexpected development.

"What?" Sheng Mingan frowned: "If you can't do it, you can exchange it with Wang Ruo and the others."

"No, I can." Chen Jingqiu reacted, walked around to Sheng Mingan and turned on the computer, found the software he said and opened it, and then received the draft book thrown by Sheng Mingan.

"Turn to the tenth page and operate according to the procedures inside. First, familiarize yourself with the software and understand what is interference superimposed surface deformation. If you don't understand something, you can search it online...Do you have a HowNet account?"

Chen Jingqiu: "No."

"Use mine." Sheng Mingan quickly said the account number and password.

Chen Jingqiu enters and logs in.

Sheng Mingan said thoughtfully: "Your memory is indeed very good. Then, I will only say some things once to see how much you can remember. There are three main techniques used in surface deformation monitoring, namely differential interferometry at cm level, Measuring mm-level permanent scatterers and short baselines, you can check the principle after you remember. We are now going to use permanent scatterers (PSInSAR) technology for monitoring, which is an algorithm... But these are traditional methods, some There are still constraints to some extent, and we need to break through this constraint..."

"The assumption of uniform surface motion is too restrictive, how to break through..."

"Data fusion and deformation detection technologies are somewhat limited, and multi-source, multi-track data fusion may be considered..."

"The PSInSAR algorithm has no starting data, and constraints can be added to the artificial corner reflector..."

One is busy solving problems, teaching wherever he thinks of, and even forgetting that he is imparting knowledge at any time, while the other concentrates on listening to lectures, looking up information, and operating software according to the draft.

The two of them took care of each other, but there was an intersection every second, and Zhao Da led Wang Ruo's team and the three of them had already started to operate the physical erection!