Chapter 541 Another acquaintance (double last day, please vote!!)
In the future life where Xu Yun traveled through time.
Due to some well-known reasons, many technologies in China's industrial development field have been stuck.
For example, the chip that everyone is familiar with.
The chip manufacturing process is extremely complex, but it can be summarized into a few major steps:
Silicon wafer preparation → epitaxial process → thermal oxidation → diffusion doping → ion implantation → photolithography → etching → process integration, etc.
The photolithography process is the most critical step in the manufacturing process,
Photolithography determines the critical dimensions of the chip and accounts for approximately 35% of the overall manufacturing cost in the entire chip manufacturing process.
At present, the domestic lithography level lags far behind the international level, which is why when talking about chips, lithography machines must be mentioned.
But if we really talk about technologies that have been severely out-of-generation and stuck—this refers to situations where both military and civilian applications are stuck at the same time—chips are not ranked that high.
Firstly, this is because military chips are not as demanding as civilian chip standards.
For example, the basic process requirements for military chips across the sea are only around 65nm. Rabbit is actually not far behind in this regard.
For example, the xxxx soul core 2#A chip used in J20 is even second to none in the world.
With the support of military supplies, the degree of chip jamming is lower than it seems.
The second is
The spread of some technologies may not be high, but their actual degree of obsolescence is countless times worse than that of chips.
The simplest is the gravity gradiometer mentioned before, which has been trapped in both civilian and military applications.
Another example is the vacuum evaporation machine that few people know about.
This thing is the "heart" of the OLED panel manufacturing process, and the entire industry is dominated by Neon's CanonTokki in the high-end market.
To what extent is the country stuck?
This level is so exaggerated that before 2019, there was not even one domestic company that produced vacuum evaporation machines.
Even now, 19 years later, there are only two companies except Ryder Equipment and Zhongshan Kaixuan Vacuum Technology.
Although it can be mass-produced, there is still a clear gap between it and the international level.
To know.
OLED panels are not like ballpoint pen tips, a technology that has little market and that rabbits are too lazy to break through.
At present, its annual demand has increased to 420 million pieces a year, which belongs to a very large business category.
In addition to the gravity gradiometer and vacuum evaporation machine.
The rabbits also have something that even the military field is stuck in, and that is
Industrial software.
So-called industrial software.
It refers to application software used in the industrial field to improve the R&D, production, management level of industrial enterprises and the performance of industrial equipment.
Its core role is to help industrial enterprises improve quality, efficiency and cost, and enhance their competitiveness in high-end manufacturing.
Give an example.
The chip manufacturing mentioned above.
Nowadays, chips the size of fingernails integrate billions of transistors. This kind of workload would be difficult for engineers to draw by hand.
Well, let’s not talk about whether the drawings it draws can be used.
The moment you finish drawing all the billions of transistors, Conan will probably be finished.
Therefore, if you want to develop chips, you must use industrial software for assistance.
At present, industrial software can be divided into three major categories according to functions:
CAD (Computer Aided Design),
CAE (Computer Aided Engineering),
CAM (Computer Aided Manufacturing).
These three software are indispensable software in today's industrial industry, and they are indispensable for the research and development of aviation, ships, automobiles, chips and other products.
But unfortunately.
At present, China does not have much say in the field of core industrial software, and it is being squeezed out quite miserably.
The market is occupied by Dassault Dassault, Germany's Siemens, Haidian PTC and Haidian Autodesk, accounting for more than 95% of the market share.
Once overseas stops software licensing, many domestic companies will suffer a major blow.
For example, Huawei.
At that time, due to cross-border sanctions, Huawei suddenly ran out of chips, and the p50 could only operate 4G.
And throughout the sanctions.
It seems that the most severe sanction clause is to prohibit Huawei from cooperating with radio frequency chip manufacturers, but in fact the most severe measure is another penalty:
Terminate Huawei's cooperation with overseas EDA software manufacturers.
The EDA software here is also a kind of industrial software, and its full name is Electronic Design Automation.
That is, electronic design automation software.
It is an industrial software mainly used to design very large-scale integrated circuits. The principle is almost the same as the transistor design mentioned above, no matter how complicated it is.
If Huawei's cooperation with TSMC is terminated, Huawei can also find other manufacturers to manufacture some low-end chips.
Then terminating EDA software is almost equivalent to taking a huge blow to Huawei, and directly cutting off the chip path from the upstream design field.
There was also the original Harbin Institute of Technology.
In May 2020, Harbin Institute of Technology received a notice of termination of the software authorization of MATLAB, the matrix laboratory.
This means that Harbin Institute of Technology no longer has the right to use genuine MATLAB.
MATLAB stuff is an extremely powerful engineering artifact. It is no exaggeration to say that without it, the efficiency may even be twice as bad.
In the future life where Xu Yun traveled through time.
Domestic industrial software can be said to be in darkness, and the glimmer of light is even lower than when the national football team entered the World Cup.
The main reason for this situation is that domestic products are really not easy to use, and there is a gap between them and foreign countries in terms of experience and efficiency.
People have to pay attention to efficiency and profitability when running a business. It is impossible to risk losses and become a guinea pig for industrial software manufacturers-unless it is a very large enterprise with the same faction behind it. For example, the University of Science and Technology and the Fudan University faction.
But even for that kind of enterprise, it will only be used by one or two departments or project teams at most, and it is impossible to cover all R&D departments.
This is a very normal business logic, and you can’t blame others for not supporting domestic products.
But on the other hand.
The actual reason for this situation is that the domestic related industry started too slowly, and it is far behind the foreign countries.
In other words, as the saying goes, if a movie starts slowly, everyone will follow suit.
Many problems that appear in domestic software have actually appeared in MATLAB and so on, so why can they survive until now?
The reason is that they run fast and there are no competing products to choose from when something goes wrong.
Therefore, when the weather Doppler radar solution was proposed.
Xu Yun deliberately laid this foreshadowing:
Want to calculate the deflection angle?
Want to develop airborne Doppler radar measurements?
no problem.
Then go digital!
All classmates who are Chinese in this life should know this.
The Chinese nation has had a special quality since ancient times.
That is, as long as you let it taste the sweetness in a certain aspect, it will spontaneously go deeper in that direction.
True.
Due to various objective circumstances, not all of the "seeds" planted by Xu Yun may grow.
But only a few can germinate.
Xu Yun or the rabbits are making a lot of money.
If everything goes particularly well.
Maybe in this world's timeline, the rabbit might get stuck in someone else's neck?
Oh, wrong, wrong.
How could a peaceful rabbit get stuck in its neck?
So it should be said differently.
For example.
Have subjective superiority in a certain field?
Well, that sounds much better.
Of course.
Although Xu Yun and Sun Junren both cared about Xiao Jiujiu at this time, neither of them showed it openly.
A person is like a harmless person recovering from a serious illness, asking and saying whatever he wants, and never crossing the red line.
The other person looks like a weather-beaten old worker, simple and honest, and only cares about the theoretical issues at hand.
Lao Guo on the side felt that something was not right.
However, due to the huge professional differences, it was just some feelings.
More than ten minutes later.
Sun Junren shook the paper in front of him like a doctor reading a CT report, and said to Xu Yun with satisfaction:
"Comrade Han Li, you have worked really hard."
"With your answers, some theoretical questions finally have answers."
"To tell you the truth, on the way to the base, everyone was almost unable to sleep due to these problems, just waiting for the results."
Sun Junren's words were really not polite.
The issues in his hand were compiled from various groups in the Tenth Academy, and the team had already conducted many rounds of discussions.
Throughout the discussion, some simple doubts were sifted out early on.
The questions that Sun Junren can ask Xu Yun are basically the common questions of everyone - no matter how bad they are, they are always controversial.
Now that they can get the answer from Xu Yun, it can be regarded as a matter of concern for everyone.
Then Sun Junren carefully put away these manuscripts, took out a small bowl of watermelon from the tent and placed it in front of Xu Yun:
"Comrade Han Li, thank you for your hard work. Come and eat some more watermelon."
"."
The corner of Xu Yun's mouth twitched twice, he raised his head and asked Sun Junren:
"Gong Sun, you don't want me to answer any theoretical questions again, do you?"
"How can this be possible?"
Sun Junren immediately puffed up his chest and denied it quickly, but then he smiled and scratched his hair twice:
"The main reason is that I personally have something other than theory that I want to talk to you about - it's not a mathematical or theoretical problem that needs to be deduced. I don't have a lot of brains, so I can chat while eating."
"."
Xu Yun sighed quietly when he saw this.
Why do these big guys act like this?
The same goes for Faraday and the others in the original copy of 1850, who trapped themselves in forcibly
Of course.
Look at it from the perspective of this era.
Being able to eat juicy watermelon in a place like Factory 221 is indeed a very rare thing, and it is enough to buy a lot of favors.
For example, in the original real history.
Academician Chen Nengkuan "bought" Academician He Zuoxiu with two imported cigarettes - friendly reminder, this boss is really not named He Zuoma
At that time, Academician He Zuoxiu worked all night for four days to calculate the peak value of the secondary chain of the U3 branch of the light-core model for these two imported cigarettes.
To know.
In order to solve this problem, the people across the sea spent a total of thirty thousand US dollars.
In addition, Xu Yun had just recovered from burns, and his body had a spontaneous desire for fruits such as watermelon.
So it's quick.
Xu Yun decided to 'give in' to Sun Junren and nodded sharply:
"Okay, Gong Sun, just say whatever you have to say."
"If I can give an answer, I will try my best to answer you."
Sun Junren was waiting for this sentence.
Hearing this, he immediately thrust the small bowl into Qiao Caihong's hand, pulled up a chair and sat next to Xu Yun:
"Actually, it's nothing. It's just my personal curiosity. I just want to talk to you about your views on the development of radar."
"Didn't you come up with the principles of weather Doppler radar? I was wondering if you might have some new insights into radar."
"Comrade Han Li, do you think radar still has development prospects in the future?"
I heard this question from Sun Junren.
Xu Yun suddenly raised his eyebrows.
What a coincidence.
Originally, he was thinking about when to mention this to Sun Junren, but he didn't expect that Sun Junren came to the door himself.
To know.
This trend in the radar industry is different from the single category of carrier-based aircraft radar mentioned before.
This kind of 'general trend' involves many fields, so Xu Yun originally planned to find an opportunity to talk to Sun Junren about it.
After all, domestic radars these days are really trying to cross the river by feeling the stones, and they have been stagnant for many years. The reason for the stagnation has nothing to do with the background of the times, but that the rabbits have indeed gone the wrong way.
For example, the hydraulic drive of the fire control radar, which was criticized crazily by later military fans, is relatively sensitive and I won’t go into details.
At the same time, a very important point is.
From the perspective of future generations.
The development periods of radar are actually easy to divide and do not require much theoretical foundation.
These three important periods are:
Birth and early development,
A period of great development
The era of modern radar.
The birth and early stages of development were naturally during World War II.
During this period, radar technology with ground-to-air, air-to-ground bombing, air-to-air fire control, and identification of friend or foe mainly appeared.
The period of great development began in the 1960s and 1970s after World War II and lasted until the mid-to-late 20th century.
There were many new radars that appeared during this period.
For example, synthetic aperture radar, pulse Doppler radar, phased array radar, etc.
As for the modern radar period, it will naturally be around 2023. The current radar function has long gone beyond the scope of "radio detection and ranging" and has gradually begun to enter urbanization scenarios.
For example, smart city is a representative example.
These trends have distinct stages and are not complicated to describe.
So Xu Yun quickly organized some words, thought for a moment, and said to Sun Junren:
"Gong Sun, in my opinion, radar research and development should be a very promising industry, and the current development is far from over."
Sun Junren raised his eyebrows, but his expression did not change much:
"Oh? What do you say?"
Xu Yun raised his eyelids, glanced at him, and said:
"You should know that the function of existing radar is actually very simple. To put it bluntly, it is to detect the target and give its distance and angular position in space."
"For example, the target is 114.514 kilometers away from us, the angle is 34 degrees northeast, etc."
"But in my opinion, this function is far from discovering the practical value of radar."
"I think a truly mature radar system should be able to conduct more detailed analysis of measurement targets."
"For example, if the radar has determined that the detected target is an aircraft, it needs to be further classified to determine its specific model."
"For example, small or large jets, small or large propeller planes, helicopters or missiles, etc."
Sun Junren was silent for a moment, with a trace of confusion in his eyes:
"It's a beautiful picture, but Comrade Han Li, is this really possible?"
The situation Han Li mentioned was not unfamiliar to Sun Junren. This was actually the complete concept at the beginning of the radar design.
But the problem is
Scientific research is not science fiction, it does not mean that you can realize a certain scenario if you think of it.
It's like the curvature engine of later generations.
All kinds of rules, that is, solutions, have been worked out for you, but there is still not a single horoscope. No, not even one ten thousandth of a digit.
What is the current situation of radar?
It’s almost the kind you see in movies:
There is a line on the instrument panel that turns and turns like a small colorful flag, then displays a small dot, and then disappears.
So after hearing the description Xu Yun said.
Sun Junren was not too surprised, but a little confused.
What he is looking for is not a science fiction-like direction, but he hopes to see the possibility of implementation - it does not necessarily require detailed principles, but there must be some technical ideas, right?
But just when Sun Junren thought Xu Yun was also drawing cakes for him.
Xu Yun's answer suddenly sounded in his ears:
"Of course it's possible."
Sun Junren was suddenly startled.
After a while.
He raised his head in astonishment and looked at Xu Yun.
Xu Yun raised his index finger towards him with some difficulty and explained:
"As long as we can distinguish various scattering centers on complex targets and finely process the echo signals to infer certain properties of the target, then there is a chance to achieve this step."
"For example, many parts on the aircraft, such as propellers, helicopter horizontal rotors, jet engines, tank tracks, rotating antennas, etc."
"They will all modulate the backscattered wave of the target, thereby forming its Doppler side lobes as identification features - this modulation signal can be extracted in both narrowband and broadband waveforms."
"These data, combined with lateral resolution, Doppler frequency and comprehensive analysis of multiple bands, should be able to achieve more precise goals, that is."
"2D Radar Imaging."
Mentioned earlier.
When the range resolution of the radar is high enough.
It can distinguish different scattering centers in a complex target and give a radial profile of the target.
Then from the profile diagram, the length of the target in the distance dimension can be roughly estimated.
This is one-dimensional radar imaging, and the radars that are available in this era are also this type of technology.
This technology is much better than low-resolution electric radar and can obtain the target scattering point intensity distribution map.
In general.
An air surveillance radar with a range resolution of 1m can obtain 7 relatively stable profiles in the L-band, which can distinguish propeller aircraft from jet aircraft - and that's it.
So at this time.
Many radar experts believe that the road ahead is closed, and many have even changed careers on the spot.
For example, Vera Larson, the designer of Britain's first fire control radar, turned directly into an actor last year. In 1972, she was nominated for an Oscar, although she did not win.
But Xu Yun knew it very well.
One-dimensional radar imaging is far from the limit of radar.
Under conditions such as high signal-to-noise ratio, attitude angle changes, and multi-image diversity synthesis.
If the technology meets the standards, two-dimensional radar imaging is the real mature technology of radar.
If we say low-resolution radar is a button cell phone before 2010.
Then one-dimensional radar imaging is equivalent to Gionee Voice King and BBK music mobile phones, which are transitional products.
under the tide of the times.
The BBK Music Phone and the familiar ‘daladalada’ theme song have become the tears of the times. Although Gionee Voice King is still alive, it has long withdrawn from the mainstream market.
Two-dimensional radar imaging is the real smartphone, the iPhone6, and the Huawei mate30 have unlimited prospects.
It can also judge the load of the aircraft through the turbulence of the aircraft up and down, thereby determining the carrying capacity of the aircraft body.
Even
Go one step further.
Think of this.
Xu Yun decided to draw another pie for Sun Junren. Anyway, we were discussing the prospects and not the specific principles:
"Gong Sun, let me give you an example. Haven't we always wanted to regain the treasure island?"
"So you might as well imagine this scenario - one day Baodao's missile was accidentally fired. Within three seconds, our radar locked the model and launch area, and calculated its trajectory and expected landing point. Information.”
"When it explodes, our trumpeter is already blowing the assembly horn. Hey, Gong Sun, why are you drooling?"
Hearing Xu Yun's last words.
Bia Liu——
Sun Junren quickly sucked back the halo from the corner of his mouth, and his eyes lit up.
Although Sun Junren is an expert in scientific research, in fact, his background is inextricably related to the army.
He dare not say that he dreams day and night of ‘missing’ the recapture of the treasure island.
But it is relatively normal to dream about playing mahjong in Kaohsiung once every five days.
Therefore, the picture drawn by Xu Yun can be said to have hit his target, causing Sun Junren to shed tears unconsciously
"Does 2D Radar Imaging"
After drying the corners of your mouth.
Sun Junren was silent for a moment and asked Xu Yun:
"Comrade Han Li, do you have any specific ideas in this regard?"
When Xu Yun heard this, he spread his hands neatly, shook his head and said:
"Gong Sun, you are just kidding me. Unless I am a person born a few decades later, how would I know this?"
"The best I can guess is that these should be related to the development of computers. After all, those calculations are obviously impossible to achieve by humans, don't you think so?"
Sun Junren nodded.
In fact, he just asked casually and did not expect Xu Yun to give a detailed plan.
Actually.
Xu Yun's ability to propose the concept of two-dimensional radar imaging has opened up a new idea for him.
Think of this.
He couldn't help but secretly made up his mind:
When you return to the capital, you must try to demonstrate the effect of digital processing on radar holdings!
If there is real potential.
Then whatever he said, he would have to make a special report to his superiors.
After a while.
Sun Junren glanced at the busy scene, pondered for a moment, and said to Xu Yun:
"Comrade Han Li, all in all, I have really helped you today."
"After talking to you like this, I understood what the ancients meant by saying that listening to your words is worth ten years of reading."
"By the way, now I have to go to the base to check the situation. How about we go there together?"
Xu Yun quickly swallowed half of the watermelon in his mouth and spit out two watermelon seeds:
"Okay."
I have to say.
Although Sun Junren was a bit sinister, the boss was surprisingly in tune with him in arranging things.
From the moment they met until now, many of Sun Junren's arrangements coincided with Xu Yun's ideas, saving him the effort of taking the initiative to speak.
As we say now, go to the pedestal and hang out.
If Sun Junren hadn't said anything, Xu Yun would have made this request.
Then under the leadership of Sun Junren.
The group soon arrived at the busy radar assembly site.
The assembly site covers an area of approximately several hundred square meters and can be divided into two parts according to circumstances:
The first is the groundbreaking area.
That is, the construction site where all kinds of hoes and shovels are clanging non-stop.
There are relatively few people at the construction site, and it is basically the members of the construction sideline team who are busy.
The task of these sideline team members is to build a suitable base on which to place the assembled radar.
Among the sideline team members working on these.
Xu Yun also met Zheng Tao, Zhou Shaoping and Zhang Gongding, but he did not say hello because they were too far away.
Among them, Zhou Shaoping was wearing a waist protector. It is estimated that Zhou Shaoping's waist injury was left at this time.
It's a pity that Xu Yun lacks experience in waist injuries, otherwise he could still help Comrade Zhou.
Then quickly.
Sun Junren took a few people to the second part, which is the area where the radar is actually installed.
There are many boxes stacked in this area, which seem to be mostly radar parts. There are several technicians busy around each box.
The closest person to Xu Yun's position was a group of people who were assembling antennas.
There are a total of six people in this group, five men and one woman. At this time, they all lowered their heads and hummed and tightened the screws.
Upon seeing this, Sun Junren walked to one of them and asked familiarly:
"Xiao Ge, how is the antenna assembly going?"
The Xiao Ge whom Sun Jun described was a young man in his twenties, wearing a white shirt, with the cuffs rolled up to his forearms, and his wet hair sticking to his forehead.
Hearing Sun Junren's greeting.
Xiao Ge turned his head subconsciously and stood at attention immediately after seeing Sun Junren:
"Commander in Chief!"
Then he quickly glanced at Xu Yun and others, wiped the sweat from his forehead, and replied:
"Reporting to the Commander-in-Chief, the rectangular locking block has been installed, and now the polarizing adjustment piece and connecting plate are on."
"Very well, thank you for your hard work."
Sun Junren patted Xiao Ge on the shoulder, turned around and introduced to Lao Guo:
"Lao Guo, let me introduce you."
"This is Comrade Ge Tongyou, we all call him Xiao Ge. He was transferred from Group 581."
“Despite his young age, his professional level is very high.”
Lao Guo suddenly raised his eyebrows and said in surprise:
"Oh? A comrade from Group 581? This is a rare visitor."
"It's really hard for you to come all the way to the base to help."
Xiaoge laughed when he heard this and scratched his hair shyly:
"No matter how hard it is, I am just a brick. I will go wherever the organization tells me to serve the collective and the people!"
Lao Guo gave him a thumbs up:
"So enlightened!"
While Lao Guo and others were chatting.
Xu Yun on the side stared at Comrade Xiao Ge in front of him in astonishment.
Group 581?
Although Lao Guo and others have tried their best to communicate in "black language".
But this kind of content is not an obstacle at all to Xu Yun, who traveled through time in later generations.
The so-called 581 group refers to China’s first satellite group.
Group 581 was established in August 1958. 581 means that the development of satellites was the number one task of the Chinese Academy of Sciences in 1958.
In those two years, satellites were the focus of the whole country. Needless to say, 95% of the elderly people named "Satellites" were born during those two years.
However, due to the emergency evacuation of the furry bear experts from the country, the rabbits first focused their resources on the development of nuclear weapons.
In the aviation field, the development of large launch vehicles and artificial satellites has been temporarily suspended, and the power has been transferred to sounding rockets.
Although in the past few years, the rabbits have successively launched the T-7M liquid sounding rocket and the first ballistic missile, making great breakthroughs in the aviation field.
But most of the time.
The entire 581 group is still in a relatively Schrödinger state.
But these are not the point.
The focus is on the functions of Group 581 and the particularity of the name [Ge Tongyou], plus the vaguely familiar outline of the other party
Xu Yun was 95% confident in his guess.
This Comrade "Little Ge" is the Ge Tongyou he met at the Xichang Satellite Launch Center!
This is like meeting an old acquaintance again
What's more important is.
According to Ge Tongyou’s original self-introduction.
Comrade Xiao Ge at this time should belong to a smaller fixed team.
Now Ge Tongyou appears here.
Doesn’t that mean
Just when Xu Yun realized something in his heart.
Not far from him, a powerful voice suddenly came:
"Lao Sun! Lao Guo!"
The moment I heard this voice.
Xu Yun's heartbeat skipped a beat without any warning.
Immediately, he turned his head sharply and looked at the person.
Only a few meters away from them.
At this time, a man in his forties with a peaceful face was walking towards them.
This person is obviously
Mr. Wang!
To be precise.
The extremely healthy and young Mr. Wang!
Note:
Maybe I didn’t write it clearly yesterday. I wasn’t saying it was a black line, I was just praising it. The aircraft carrier was photographed as a fishing boat. This is a joke in the military circle
It’s the last day for double monthly tickets. After today, monthly tickets will not be doubled. Ten thousand words or nearly ten thousand words have been updated for six consecutive days. Please give me a monthly ticket. (End of chapter)