Into Unscientific Chapter 541

  In Xu Yun's later life.

  Due to some well-known reasons, Huaxia has been stuck in many technologies in the field of industrial development.

   For example, the chip that everyone is familiar with.

  The chip manufacturing process is extremely complicated, but it can be summarized into several major steps:

  Silicon wafer preparation→epitaxy process→thermal oxidation→diffusion doping→ion implantation→lithography→etching→process integration, etc.

  The photolithography process is the most critical step in the manufacturing process.

  Lithography determines the critical dimensions of the chip, which accounts for about 35% of the overall manufacturing cost in the entire chip manufacturing process.

  The current domestic lithography level is far behind the international level, which is why the lithography machine is mentioned when talking about chips.

  But if we really want to talk about the technology that has been severely generation-stuck—this refers to the situation where military and civilian uses are stuck at the same time, the chips are not so advanced.

  One reason is that military chips are not as demanding as civilian chip standards.

  For example, the basic process requirements of military chips across the sea are only around 65nm, and the rabbit is not far behind in this respect.

   Like the Xxxx Soul Core 2#A chip used on the J20, it can even be used internationally.

  With military supplies at the bottom of the pocket, the degree of chips stuck on the neck is lower than it seems.

  The second is

  Some technologies may not have a high degree of dissemination, but their actual degree of generational discontinuity is infinitely more serious than that of chips.

   The simplest is the gravity gradiometer mentioned before, whether it is for civilian or military use, it is all looped.

   Another example is the vacuum evaporation machine that few people know.

   This thing is the "heart" of the OLED panel manufacturing process, and the entire industry is monopolized by Neon's CanonTokki in the high-end market.

  To what extent is the country stuck?

   This degree of exaggeration is so exaggerated that before 2019, there is not even a domestic company that produces vacuum evaporation machines.

  Even if it is 19 years later, there are only two companies except Ryder equipment glue bait Zhongshan Kaixuan Vacuum Technology.

  Although it can be mass-produced, there is still a clear gap with the international level.

To know.

  OLED panels are not a technology that has no market like a ballpoint pen tip, and 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 commercial category.

  In addition to the gravity gradient instrument and vacuum evaporation machine.

  The rabbits also have another thing that is stuck in the munitions field, that is

  Industrial software.

  So-called industrial software.

   refers to the 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, increase efficiency and reduce costs, and enhance the competitiveness of enterprises in high-end manufacturing.

for example.

   Chip manufacturing mentioned above.

  Now a fingernail-sized chip integrates billions of transistors, if this kind of workload can be hand-painted by engineers.

   Well, let's not talk about whether it can be used for drawing.

  The moment you finish drawing billions of transistors, it is estimated that Conan will have a finale.

   Therefore, if you want to develop chips, you must use industrial software to assist.

  Currently industrial software can be divided into three categories according to their functions:

  CAD (Computer Aided Design),

  CAE (Computer Aided Engineering),

  CAM (Computer Aided Manufacturing).

  These three softwares are indispensable in today's industrial industry, and they are indispensable for the research and development of aviation, shipbuilding, 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 quite miserable.

  The market is occupied by more than 95% of the market by Gaul Dassault, Siemens, PTC and Autodesk.

   Once Haidian stops software authorization, many domestic companies will suffer a major blow.

   For example Huawei.

  Due to the sanctions across the sea, Huawei ran out of chips, and the p50 could only turn on 4G.

   And throughout the sanctions.

   It seems that the heaviest sanction clause is to prohibit Huawei from cooperating with RF chip manufacturers, but in fact the most ruthless move is another punishment:

   Terminate the cooperation between Huawei and EDA software manufacturers across the sea.

  The EDA software here is also a kind of industrial software, and its full name is Electronicdesignautomation.

   is electronic design automation software.

  It is mainly used to design a kind of industrial software for VLSI. The principle is almost the same as the transistor design mentioned above, which is a little bit more complicated.

  If the cooperation between Huawei and TSMC is terminated, Huawei can find other manufacturers to manufacture some low-end chips.

   Then terminating the EDA software is almost equivalent to giving Huawei a drudgery, and directly cutting off the chip road for you from the upstream design field.

   There was also Harbin Institute of Technology.

   In May 2020, Harbin Institute of Technology received a notice of the termination of the software authorization of MATLAB, which is the matrix laboratory.

  This means that Harbin Institute of Technology no longer has the right to use genuine MATLAB.

  MATLAB is an extremely powerful engineering artifact. It is no exaggeration to say that the efficiency may even be doubled if it is without it.

  In Xu Yun's later life.

  Domestic industrial software can be said to be in the dark, and the dawn is even lower than the national football team entering 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 foreign countries in terms of experience and efficiency.

  People want to pay attention to efficiency and profitability when starting a business, and it is impossible to take the risk of losing money to be the guinea pig of an industrial software manufacturer—unless it is a super-large enterprise with the same faction behind it, such as the University of Science and Technology and Fudan.

  But even for that kind of enterprise, at most one or two departments or project teams will be arranged for use, and it is impossible to cover all R&D departments.

   This is a very normal business logic, and there is no way to blame others for not supporting domestic production.

But on the other hand.

  The real reason for this situation is that the domestic related industry started too slowly, and it is not known how many positions are behind the foreign countries.

   That is to say, as the saying goes, a movie starts slowly, and every part follows slowly.

  Many faults 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 we come up with the weather Doppler radar plan.

  Xu Yun deliberately planted this foreshadowing:

   Want to calculate the drift angle?

  Want to develop airborne Doppler radar?

no problem.

   Then go digital!

   Students who have been Chinese in this life should know it.

  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.

   Indeed.

  The "seeds" planted by Xu Yun may not all be able to grow due to various objective circumstances.

   But only a few can sprout.

   Xu Yun or the rabbits just made a lot of money.

  If all goes well.

  Maybe in the timeline of this world, the rabbit might get stuck in someone else's neck?

   Oh, wrong wrong.

  How could a peace-loving rabbit get stuck?

   So it should be said differently.

  For example.

   Have subjective superiority in a certain field?

   Well, this sounds much better.

Of course.

  At this time, although Xu Yun and Sun Junren both had a little bit of love in their hearts, neither of them showed it on the surface.

  One person asks and talks like a harmless patient recovering from a serious illness, and never crosses 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.

  Old Guo on the side felt that something was wrong.

  However, due to the large difference in majors, it is only a few feelings.

   More than ten minutes later.

  Sun Junren shook the manuscript paper in front of him like a doctor reading a CT report, and said to Xu Yun contentedly:

   "Comrade Han Li, it's really hard for you."

   "With your answers, some theoretical questions are finally answered."

   "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 are really not polite.

  The questions in his hand were collected from various groups of the Tenth Academy, and the team had already conducted multiple rounds of discussions.

  Throughout the discussion, some simple doubts were sieved out early.

  The questions that Sun Junren can ask Xu Yun are basically the common questions of everyone—no matter how bad they are, they are also controversial.

   Right now, being able to get an answer from Xu Yun can be regarded as a matter of concern for everyone.

  Sun Junren then carefully put away these manuscripts, took out a small bowl of watermelon from the tent and put it in front of Xu Yun:

   "Comrade Han Li, you've worked hard, come, let's eat some more watermelon."

  The corners of Xu Yun's mouth twitched twice, he raised his head and asked Sun Junren:

   "Sun Gong, you don't want me to answer some theoretical questions again?"

   "How can this be?"

  Sun Junren immediately raised his chest, and quickly denied it, but then he smiled and scratched his hair twice:

   "The main reason is that I personally want to talk to you about something other than theory—it's not a mathematical or theoretical problem that needs to be deduced. I don't know how to grow my brain, so I can chat while eating."

  Xu Yun sighed faintly when he saw this.

  Why do these bosses behave like this?

  The same goes for Faraday in the original 1850 copy, they forcibly put themselves into it

Of course.

  Look at it from the perspective of this era.

   It is indeed a very rare thing to be able to eat juicy watermelon in a place like Factory 221, which is enough to earn a lot of favors.

   For example in the original real history.

  Academician Chen Nengkuan "bought" Academician He Zuoxiu with two imported cigarettes—a friendly reminder, this boss is really not called He Zuoma

  Academician He Zuoxiu spent four days all night calculating the peak value of the secondary chain of the U3 branch of the light nuclear model for these two imported cigarettes.

To know.

  Across the sea, in order to solve this value, it spent a full 30,000 dollars.

  In addition, Xu Yun had just recovered from the burn at this time, and his body had a spontaneous desire for fruits such as watermelon.

   So fast.

  Xu Yun still decided to 'surrender' to Sun Junren, and nodded neatly:

   "Okay, Sun Gong, just say what 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 stuffed the small bowl into Qiao Caihong's hand, pulled a chair and sat beside Xu Yun:

   "Actually, it's really 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 principle of weather Doppler radar? I was wondering if you might have some new insights into radar."

   "Comrade Han Li, do you think radar has a bright future?"

   Heard Sun Junren's question.

  Xu Yun raised his brows immediately.

   Coincidentally.

   Originally, he was wondering when he would mention this to Sun Junren, but he didn't expect Sun Junren to come to the door himself.

To know.

  The trend of this radar industry is different from the single category of carrier-based aircraft radar mentioned earlier.

  This kind of 'big trend' involves many fields, so Xu Yun originally planned to find an opportunity to talk to Sun Junren.

   After all, domestic radars are really crossing the river by feeling the stones these days, and they have been stagnant for a long time. The reason for the stagnation here 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 crazily complained by military fans in later generations, is more sensitive and I won't go into details.

   At the same time, it is very important.

  From the perspective of future generations.

  The development period of radar is actually very well divided, and does not require too much theoretical basis.

  The three important periods are:

  Birth and initial stage of development,

  Great development period,

  Modern radar period.

  The initial period of birth and development was naturally during World War II.

   During this period, radar technology mainly appeared for ground-to-air, air-to-ground bombing, air-to-air fire control, and identification friend or foe.

  The period of great development began in the 1960s and 1970s after World War II and lasted until the middle and late 20th century.

   There were many new radars that appeared during this period.

   Such as synthetic aperture radar, pulse Doppler radar, phased array radar, etc.

  As for the era of modern radar, it is naturally around 2023. The current radar function has long gone beyond the scope of "radio detection and ranging", and has gradually entered the urbanization scenario.

   For example, a smart city is a representative.

  These trends are very clear in stages, and the description is not complicated.

   So Xu Yun quickly organized some words, thought for a moment, and said to Sun Junren:

   "Sun Gong, 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 brows, but his expression didn't change much:

   "Oh? How do you say it?"

  Xu Yun raised his eyelids and glanced at him, then said:

   "You should know that the function of the 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, and the angle is 34 degrees northeast, etc."

   "But in my opinion, this function is far from realizing the practical value of radar."

   "I think a truly mature radar system should be able to conduct a more detailed analysis of the measurement target."

   "For example, if the radar has determined that the detected target is an aircraft, it needs to further fine-tune the classification to determine its specific model."

   “Such as small or large jets, small or large propeller planes, helicopters or missiles, etc.”

  Sun Junren was silent for a moment, with a hint of bewilderment in his eyes:

  "It's a beautiful picture, but...Comrade Han Li, is this really possible?"

  Sun Junren is no stranger to the situation Han Li mentioned. This is actually the complete concept of the radar design at the beginning.

   But the problem is

  Scientific research is not science fiction. It does not mean that you have the ability to realize a certain scenario if you think about it.

   It is like the curvature engine of later generations.

   Various metrics, that is, solutions, have been figured out for you, but there is still no horoscope. No, not even a ten-thousandth.

  What is the current situation of the radar?

   It is almost the kind you see in the movie:

  There is a line on the instrument panel that rotates like a small flag, and then a small dot is displayed, and then it disappears.

  So after hearing what Xu Yun said.

  Sun Junren was not overly surprised, but a little confused.

  What he is looking for is not a science fiction-like direction, but hopes to see the possibility of realization—not necessarily detailed principles, but there must be some technical ideas, right?

  But just when Sun Junren thought that Xu Yun was also painting a cake for himself.

  Xu Yun's answer suddenly sounded in his ears:

   "Of course it's possible."

  Sun Junren was startled for a moment.

   After a while.

  He raised his head in astonishment, and looked at Xu Yun.

  Xu Yun raised an index finger towards him with some effort, and explained:

   "As long as it is possible to distinguish individual scattering centers on a complex target and fine-tune the echo signal to infer some properties of the target, then there is an opportunity to do this."

   "For example, many parts on the aircraft, such as propellers, helicopter horizontal rotors, jet engines, and tank tracks, rotating antennas, etc."

   “They both modulate the target's backscattered waves, creating its Doppler sidelobes as an identifying signature—this modulation can be extracted in both narrowband and wideband waveforms.”

   "These data, combined with lateral resolution, Doppler frequency and multi-band comprehensive analysis, should be able to achieve more refined goals, that is."

   "Two-dimensional 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 cross-sectional view, the length of the target in the distance dimension can be roughly estimated.

   This is one-dimensional radar imaging, and radars that have been released in this era are also this type of technology.

  This technology is much better than low-resolution electric radar, and can obtain the intensity distribution map of target scattering points.

  Generally.

  An air surveillance radar with a specification of 1m distance resolution can get 7 relatively stable profiles in the L-band, which can distinguish propeller aircraft from jet aircraft-and then nothing more.

  So in this period.

  Many radar experts believe that the way forward is dead, and many even change careers on the spot.

  For example, Vera Larsson, the designer of Britain's first fire control radar, turned directly into an actor last year, and was nominated for an Oscar in 1972, although he didn't win.

   But Xu Yun is very clear.

  One-dimensional radar imaging is far from the limit of radar.

  Under the conditions of high signal-to-noise ratio, attitude angle change, multi-image diversity synthesis, etc.

  If the technology meets the standards, two-dimensional radar imaging is the real mature technology of radar.

  If the low-resolution radar is the button 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.

  Backgammon music phones and the familiar theme song 'daladalada' have become the tears of the times. Although Gionee Voice King is still alive, he has already withdrawn from the mainstream market.

  Two-dimensional radar imaging is the real smartphone, which is the iPhone6 ​​and Huawei mate30.

  It can also judge the aircraft load through the up and down bumps of the aircraft, so as to determine the carrying capacity of the airframe.

even

   goes one step further.

  Think here.

  Xu Yun decided to draw another big cake for Sun Junren. Anyway, the discussion is about the prospect and not the specific principle:

   "Sun Gong, let me give you an example, don't we always want to recover Treasure Island?"

"So you might as well imagine this scenario—one day, a missile from Baodao misfired, and within three seconds our radar locked on the model, launch area, and calculated its trajectory and expected landing point and other information. .”

   "By the time it explodes, our trumpeter is already blowing the rallying call Hey, Mr. Sun, why are you drooling?"

   Heard Xu Yun's last words.

  Sun Junren quickly sucked back the pout at the corner of his mouth, and his eyes lit up.

  Although Sun Junren is an expert in scientific research, his background is inextricably linked to the army.

  He dare not say that day and night he is dreaming of 'Missing' to regain Treasure Island.

  But it is quite normal to dream of playing mahjong in Kaohsiung once every five days on average.

   Therefore, the picture drawn by Xu Yun can be said to have hit his point, making Sun Junren unknowingly shed tears

   "Is 2D Radar Imaging"

  After drying the corners of the mouth.

  Sun Junren was silent for a moment, and asked Xu Yun:

   "Comrade Han Li, do you have any specific ideas in this regard?"

  Xu Yun spread his hands neatly when he heard the words, shook his head and said:

   "Sun Gong, you are just joking, unless I am a person from decades later, how would I know this?"

   "At most, I guess that these should be related to the development of computers. After all, those calculations are obviously impossible to be achieved by human beings, don't you think?"

  Sun Junren nodded.

  In fact, he was just asking casually, and he didn't expect Xu Yun to give a detailed plan.

   Actually.

  Xu Yun was able to propose the concept of two-dimensional radar imaging, which has opened up a new way of thinking for him.

  Think here.

  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 the increase in radar holdings!

  If it really has potential.

  Then he has to make a special report with his superiors for everything he says.

   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 really have to thank you today."

   "After chatting with you like this, I finally understood what the ancients meant when they said that listening to your words is better than reading ten years of books."

   "By the way, now I have to go to the base to check the situation, why don't we go there together?"

  Xu Yun quickly swallowed half of the watermelon in his mouth, and spit out two watermelon seeds:

"OK."

have to say.

  Although Sun Junren is a bit dark-bellied, this boss is unexpectedly in tune with him in the arrangement of things.

  From the meeting to the present, many of Sun Junren's arrangements coincided with Xu Yun's ideas, saving him the effort to speak up.

   Go to the pedestal as we say now.

  If Sun Junren didn't say it, Xu Yun would also make this request.

   Then under the leadership of Sun Junren.

   A group of people soon arrived at the busy radar assembly site.

  The area of ​​the assembly site is about several hundred square meters, which can be divided into two parts according to the situation:

  One is the ground breaking area.

   That is, the construction site where all kinds of hoes and shovels kinlin clang non-stop.

  The number of people on the construction site is relatively small, and basically all members of the construction sideline team are busy.

  The task of these sideline team members is to build a suitable abutment to house the assembled radar.

  Among the sideline players who work on these.

  Xu Yun also met Zheng Tao, Zhou Shaoping and Zhang Gongding, but they didn't say hello because they were too far away.

   Among them, Zhou Shaoping was wearing a waist protector, and Zhou Shaoping's waist injury in later generations is estimated to be left at this time.

  It's a pity that Xu Yun lacks experience in waist injuries, otherwise he can help Comrade Zhou.

   Then soon.

  Sun Junren brought several people to the second part, which is the area where the radar is actually installed.

  There are many boxes piled up in this area, most of which seem to be radar parts, and there are several technicians working around each box.

  The closest to Xu Yun's position is a group of people who are assembling antennas.

   There are six people in this group, five men and one woman, and they are all humming and **** the screws with their heads down.

  Seeing this, Sun Junren walked up to one of them, and asked familiarly:

   "Xiaoge, how is the antenna assembly going?"

  Xiao Ge in Sun Jun's population is a young man in his twenties, wearing a white shirt with cuffs rolled up to his forearms, and his wet hair is a little messy against his forehead.

   Hearing Sun Junren's greeting.

  Xiaoge turned his head subconsciously, and immediately stood at attention when he saw Sun Junren:

   "Commander!"

   Then he quickly glanced over Xu Yun and the others, wiped the sweat from his forehead, and replied:

   "Report to the commander-in-chief, the rectangular locking block has been installed, and now the upper polarization adjustment piece and the connecting plate."

   "Very well, thank you for your hard work."

  Sun Junren patted Xiao Ge on the shoulder, then turned around and introduced to Lao Guo:

   "Old Guo, let me introduce you."

   "This is Comrade Ge Tongyou, we all call him Xiao Ge, he was transferred from the 581 group."

   "Although he is young, he has a high professional level."

  Old Guo suddenly raised his brows and said in surprise:

   "Oh? Comrades from Group 581? This is really a rare visitor."

   "It's really hard to trouble you to come to the base to help out after traveling so far."

  Xiaoge smiled when he heard the words, and scratched his hair shyly:

   "No hard work, no hard work, I am just a brick, I will go wherever the organization tells me to, and serve the collective and the people!"

  Old 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 with a look of astonishment.

  581 groups?

  Although Lao Guo and others have tried their best to communicate in 'black language'.

  But this kind of content does not constitute an obstacle in the slightest to Xu Yun who traveled through time.

  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 is the number one task of the Chinese Academy of Sciences in 1958.

  Satellite was the focus of the whole country in those two years. Now people whose name is "Satellite" and are elderly, no need to guess, 95% were born in those two years.

  But later, because the bear experts were evacuated from the country urgently, the rabbits first shifted their resources to the development of nuclear weapons.

  In the field of aviation, the development of large-scale launch vehicles and artificial satellites was temporarily suspended, and the power was first transferred to sounding rockets.

  Although the rabbits have launched the T-7M liquid sounding rocket and the first ballistic missile successively in the past few years, they have made 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], coupled with the vaguely familiar outline of the other party

  Xu Yun guessed with 95% certainty.

  This Comrade 'Xiao Ge' is the fellow Ge fellow he met at the Xichang Satellite Launch Center!

   This is another old acquaintance

   Another more important thing 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 appeared here.

  Doesn't that mean

   Just when Xu Yun realized something in his heart.

  Not far from him, suddenly came a voice full of air:

   "Old Sun! Old Guo!"

  The moment I heard this voice.

  Xu Yun's heart skipped a beat without warning.

   Immediately, he turned his head suddenly and looked at the person coming.

   I saw them a few meters away.

  At this time, a man in his forties with a peaceful face was walking towards them.

  This person is impressively

  Old Wang!

   To be precise, yes.

  Incomparably healthy and young Wang Lao!

Note:

  Maybe I didn't write clearly yesterday, I'm not a black military announcement, I'm just boasting, the aircraft carrier was photographed as a fishing boat, this is a stalk in the military circle

   It's the last day for the double monthly pass. After today, the monthly pass will no longer be doubled. The 4D or Quasi 4D will be renewed for six consecutive days. Please ask for a monthly pass.

Chapter end