The short period of less than ten minutes from when Xu Dajiang came to inspect the new recruitment area of the Mathematical College to when Liu Chenfeng came over with food really subverted Zhang Zhou's understanding of the school environment.
His impression of Qiao Ze was that the doctor who called himself Wang Ke went to the dormitory privately to ask Qiao Ze for advice on how to write a thesis.
After being commented on by Qiao Ze, he turned red with embarrassment and ran away.
For a long time, Wang Ke had become a source of fun for him and Gu Zhengliang.
Who would have thought that after just one summer vacation, another doctor from the college not only licked her without any shame, but what was even more outrageous was that this doctor was a student of the dean.
What's even more outrageous is that the dean also asked Qiao Ze to help look after his doctoral students as a matter of course, and everyone behaved calmly.
Even the doctor brother didn't feel embarrassed at all.
In addition, Dean Xu had just patiently explained to Qiao Ze and seemed eager to obey him. No matter how slow Zhang Zhou was, he could feel that Qiao Ze's status in the college had been improved. And this improvement is huge.
Zhang Zhou's curiosity was about to explode. He really wanted to know what Qiao Ze had done this summer vacation.
So while Liu Chenfeng was busy setting out the dishes and sharing the meal, Zhang Zhou immediately came over and asked, "Brother Qiao, what are you busy with this summer vacation?"
He simply asked: "You don't know why the satellite resolution cannot currently reach 1 mm?"
So Qu Kezhi said with a slightly sour taste: "Come on, brother, don't be humble. I am Qu Kezhi, a junior majoring in optoelectronic information in the School of Physics. How could you, a great student in the School of Mathematics, explain things like optical frontiers so clearly? You You should be in your sophomore year, right? If you are willing to come, it will be easy to secure a graduate degree in the future. By the way, what is your name? I will recommend it to you later."
So while eating, he kept talking: "Qiao Ze, have you ever heard of the difference between math students and physics students?"
Qiao Ze's last question finally came to an end, and he immediately said enthusiastically: "Ah, yes, yes, yes, our Professor Chen also said that the decimeter level is enough, and our goal is to achieve a resolution of about 20 centimeters. Brother, what's your name? I feel like it's a waste of time for you to stay in the School of Mathematics. Why don't you come and do physics with us? I can help you recommend it to Professor Chen. It will definitely be no problem for you to come and work on the project with us. .”
The obviously older senior brother who had brought the meal with a smile on his face suddenly turned serious and glared at him fiercely.
The little fat man who had been hit all the time looked at him with the most complicated eyes...
"good."
Liu Chenfeng nodded immediately and said, "Yes, what's the matter?"
Qiao Ze twitched the corners of his lips. He wasn't pretending this time, because Zhang Zhou's summary was indeed interesting, and he understood what Zhang Zhou meant by what he said.
Before Qiao Ze could answer this time, Su Mucheng said with a smile: "Hey, senior, my boyfriend's name is Qiao Ze. Qiao is the Qiao from the beauty of the Three Kingdoms, Da Qiao and Xiao Qiao, and Ze is the Ze from the world." Okay, you must recommend him to Professor Chen, and you must tell Professor Chen more about how awesome my boyfriend is."
As we all know, as a pursuing college student, it doesn't matter if you lose a little face in front of a bunch of brothers. But if there is a beautiful girl mixed between brothers, the situation is different.
The most important thing is that there is a cute girl here in the math college.
"Cough cough cough..." Zhang Zhou suddenly started coughing crazily.
Multi-satellite arrays are feasible, but the stability required for multiple telescopes to focus light from different locations at the same time is too high. Jitter in the relative positions between satellites may cause phase reconstruction to fail. The key point is that it seems meaningless to spend so much effort to achieve millimeter-level resolution. For now, decimeter level is enough, right? "
Opposite Liu Chenfeng listened to the discussion of several people and glanced at the fat Zhang Zhou with some pity. He wanted to say something, but in the end he kept his mouth shut.
It's a bit like how he feels when he occasionally gets a brain cramp and says something stupid and is looked at with disdain. But it's not too complete, and it seems to be a bit gloating.
Who are you looking down on?
Qiao Ze's expression became serious, and his tone had a rare warmth at the beginning: "Can he hear me when I speak now?"
Qiao Ze thought for a while and replied: "The coherence of reflected light is also worrying, unless a laser is used. Grouped narrowband filtering is one direction, but there are too few groups, insufficient brightness, too many groups, and the complexity of the optical path increases exponentially. As for the synthesis of ideas, It is feasible on the ground, but if it is launched into space, considering the focal length of the telescope itself and the back-end equipment, the rocket carrying requirements are too high.
It was so straightforward that it made Zhang Zhou blush: "Ahem, I have some guesses, but I don't know if they are right. And it's not just me, I think Su Mucheng must not know either."
Qiao Ze tilted his head slightly and said with some confusion: "I'm not very good at optics, but I remember that the principle of synthetic aperture is to use coherent superposition for time domain analysis. Coherence requires consistent wavelengths to achieve good results. Passive optical imaging accepts It is natural light composed of continuous wavelengths, and its coherence is very poor, right?
Qiao Ze glanced at Su Mucheng and was too lazy to say anything more. He picked up the lunch box and started eating silently.
Are you too good at showing off?
Liu Chenfeng and his tutor Xu Dajiang are definitely wearing the same pants when it comes to leaving Qiao Ze in the School of Mathematics.
Zhang Zhou also tried to persuade him: "Chengzi is right. We are all classmates. Let's calm down. Besides, Brother Qiao doesn't plan to go to the School of Physics, right?"
As soon as he finished speaking, Qu Kezhi suddenly felt that something was wrong in the atmosphere.
When he was sitting there and just having some free time, he heard several people from the School of Mathematics talking about the difference between physics and mathematics and satellite imaging. He became interested and thought of coming over to chat with them and show off his good opinion of his tutor.
"Huh?" Qiao Ze glanced at Zhang Zhou, thought for a while, and answered: "Do the project."
Does the School of Physics also dare to take advantage of the School of Mathematics?
"Is there any difference?" Qiao Ze seemed interested.
But for outstanding students who are already able to do projects with professors in their junior year, this is no secret.
Okay, Zhang Zhou plans to put this question aside and go back to ask Chen Yiwen that evening.
This was because he was frightened, after all, he had never heard of it.
"You've eaten, don't worry about me. I'll hang up first."
After connecting the phone, the voice from the receiver was slightly panicked: "Hey, Qiao Ze, I just came back to prepare for my lunch break. A guest came to the house. He said he was the principal of the school, Zhang, and he showed me his ID. By the way. , the name on the ID card was Zhang Xiaoquan. I let him in, but as soon as I sat down I couldn’t understand what he was saying. He said it was not easy for him to become the principal. After years of hard work, he begged us to let him go. This man deserves it. Isn’t he a lunatic?”
I would listen to some discussions among the people in the group.
Qu Kezhi was a little confused at first. After all, the name was indeed very familiar. After a moment, he suddenly said: "Qiao Ze? The Qiao Ze from the School of Mathematics who came up with the theory of the new lithography machine? Let me go, you are Qiao Ze? Our Professor Chen is very The Qiao Ze you admire?"
"Well, Brother Qu, just do what you're supposed to do. There's no resolution. Maybe the Americans have installed a hundred new Nvidia graphics cards on their satellites, and turned on the DLSS function on all of them to forcibly increase the resolution. Are you on it? Do you understand the AI super-resolution algorithm? What’s the future in physics? You see, we just designed an algorithm and solved all the problems. Didn’t you see that we are going to eat? If your school of physics can’t eat, what will happen to me? Leave a bite for you?"
what does it mean?
"Oh." Zhang Zhou nodded.
Especially the sentence "I'm not very good at optics", and then Balabala asked a bunch of questions, which made him feel slightly embarrassed.
Qiao Ze hung up the phone, and everyone's eyes were already focused on him.
"Senior brother, why are you talking like this?" Qu Kezhi looked at Liu Chenfeng angrily and said in a low voice.
"Haha, Brother Liu, no quarrel, no quarrel, we are all classmates." Su Mucheng tried to smooth things over.
At this time, he seemed to be attracted by the discussion of several people. A boy with glasses from the School of Physics next door also took the initiative to come over: "Hey, it turns out that your School of Mathematics also knows so much about physics? Come to think of it, what are you discussing? Topic, Professor Chen from our college is doing research in this area, working on multi-satellite synthetic aperture technology."
But he still felt that he should talk to Qiao Ze about something else...
Qiao Ze nodded, Zhang Zhou blinked, and then his whole face turned red visibly.
Liu Chenfeng, who got angry, couldn't help but speak and chased people away.
In addition, time domain analysis requires continuous measurement of light. CCD and CMOS are not antennas. They can only obtain the total brightness information per unit time of one exposure of light. How can multiple satellites locate phase information if they are not in a real-time continuous measurement system? And for multiple satellites, we need to consider the time-varying array spacing, right? "
A guy like Qu Kezhi who feels good about himself must be among his key targets.
"Yes, yes, that's what I thought of." Zhang Zhou immediately nodded frantically, finally feeling a little more comfortable.
Then the girl from the mathematics school who he paid most attention to suddenly had a bright smile on her face.
The answer is, as always, no loopholes, but it's not very helpful.
"I know, optical equipment has a resolution limit! Starlink is currently the satellite closest to the earth, about 120 kilometers. I would consider it 100 kilometers, but this distance is very dangerous and you may fall directly. Even so, the resolution is To reach 1 mm, the optical aperture needs to be more than 70 meters.
"Oh, that's it, then I'm relieved. By the way, have you eaten?" Lu Xiuxiu's tone on the other side also softened.
A bunch of guys who are extremely anxious about finding a research direction, and are deeply afraid that one day what they are researching will be proven wrong by the laboratory, they actually have the nerve to poach the corner of the School of Mathematics? Who gave this guy the courage?
Even if it is forced, respect must be restored.
After Qiao Ze published those two papers in Science, under the tacit cooperation of many parties to suppress them, they only caused some shock in the relevant fields. They did not have much impact on the social level and were not widely disseminated. This also directly caused the summer vacation. Zhang Zhou, who had been busy attending various gatherings and answering questions, had never heard of this matter.
A series of questions were asked, and then another sentence was asked: "You don't know much about optical systems?"
He had already stood up, and his cell phone had directly dialed Li Jiangao's number. While waiting for the call, he looked at Liu Chenfeng and asked, "Is there a principal named Zhang Xiaoquan in the school?"
The elder brother's expression softened, but Qiao Ze's words aroused Qu Kezhi's rebellious psychology.
Unexpectedly, the guy who didn't look very talkative had a series of questions that made him a little overwhelmed.
Qiao Ze ate in silence until his phone suddenly vibrated. He put down the bowl and chopsticks, picked up the phone and looked at it. Well, it was his mother's call.
Moreover, with the mass of such a large optical mirror, it cannot operate for a long time 100 kilometers outside the earth. It is safe to operate at least 300 kilometers. The diameter of the optical mirror used by the satellite must reach almost 200 meters. The total diameter of the Webb telescope lens is just over 6 meters! Americans are really so powerful, they even won the Star Wars. Right, Brother Qiao. "
This made Zhang Zhou excited: "Of course there are. For example, mathematics students memorize and prove theorems every day, and physics students calculate formulas and calculate integrals every day. Mathematics students care most about proofs, and physics students like approximations the most. Mathematics students think that physicists' Formulas are annoying because they don’t care about numerical results; physics students think math is nonsense because they don’t care about the proof process... haha.”
"I was pouring tea in the kitchen, but he was in the living room and couldn't hear me."
Qiao Ze said softly: "Oh, it's Principal Zhang Xiaoquan! It's okay, Mom, he's not sick, but he's been under a lot of pressure from work recently, and he's been feeling depressed. Besides, Uncle Li, Dean Xu, and I are right next to the house and are about to go back. However, you should keep a certain distance from him, look into his eyes more, and listen to what he says. Don’t refuse or prevaricate his requests. Keep silent in your mind for tens of seconds, and then agree first regardless of whether you can do it or not. Okay, psychologically this can relieve his anxiety, which is good for his work, and I will need a lot of help from him in the future."
Only the guy who kept talking was the most normal. He just shook his head and said: "Not for the time being. I don't know much about optical systems and I don't have much interest."
"Um..." Qu Kezhi looked at Qiao Ze with some surprise.
In the end, Qiao Ze probably felt that Zhang Zhou was too embarrassed. After a moment of silence, he said: "Actually, it's not entirely because of these. The resolution is too high and the pixels are the same, so the field of view will be narrowed. In addition, in theory, ultra-high resolution images need to With enough exposure time, it is difficult for a satellite 300 kilometers above the ground to have sufficient time for exposure. If you also include atmospheric disturbance, it will often blur the image of photos with too high resolution, so it is even more difficult."
"It's like this. I've just been accepted into the professor's project team to do some calculation work. But now I'm in the research stage, so I'm just looking for ways. For example, if you want coherence, you can use active light sources to test objects. Reflected light of the same frequency, or grouped narrow-band filtering, and then synthesized. As for the phase information, you can cooperate with the radar. The signal received by the radar has a complete waveform, including complete amplitude and phase information."
Unexpectedly, as soon as Zhang Zhou finished speaking, Su Mucheng retorted from the side.
