Since ancient times, the tactics of improving the concealment of weapons and launching surprise attacks to deliver a fatal blow to the enemy when the enemy is unprepared have been highly regarded.
For example, in the ancient history of China, the famous Jing Ke assassinated the King of Qin by placing the dagger on the map to achieve visual invisibility of the weapon, which almost cost the life of a great emperor.
With the development of science and technology, radar waves, infrared rays and other methods can be used to detect opponents at ultra-long distances. How to maintain the stealth of weapons is a goal that all countries are pursuing.
Stealth aircraft was born in this context.
It uses a variety of stealth technologies to reduce the signal characteristics of the aircraft, making it difficult for enemy radars to detect, identify, track and attack, in order to achieve the purpose of anti-radar, anti-infrared, anti-electronic, and anti-sound wave detection, thereby achieving the stealth effect.
Combat aircraft.
The first generation of stealth aircraft was born in the United States, represented by the F-117a "Nighthawk" stealth fighter-bomber, and topped by the famous Phantom B2.
This is an aircraft that can change the pattern of air combat.
In the 1990s, after Classmate Yin invaded Classmate Sha, the United States launched the Desert Shield Project and sent 45 F-117As to the base of Classmate Sha.
This is the world's first large-scale use of stealth fighters in combat.
In this war, the F-117a showed its talents. The first wave entered Classmate Yin's airspace, and quietly passed through the gate of Classmate Yin's airspace, and directly dropped bombs at a height of less than 600 meters from the ground.
Accurately destroy a large number of Yin's radars, anti-aircraft guns, anti-aircraft missile sites and other key facilities.
This war allowed everyone to see that this is how modern war is fought.
At the same time, it also woke up all the countries in the world, including a certain rabbit on the peninsula who beat up a hawk with millet and a rifle.
Everyone is reflecting on whether Student Yin could survive or win if he were in his place.
But no matter how you calculate, the final result points to one path, and it is impossible to win.
Even if there is a broader strategic depth, more personnel advantages, and stronger beliefs...but in the face of this new era of war, these are almost unable to form effective resistance.
This battle woke up and scared all the audiences around the world.
Since then, the development of modern weapons and stealth aircraft has officially entered the eyes of all countries.
........
After learning some information from Fan Pingbo and Qin Anguo, Xu Chuan realized how important the radiation energy absorption and conversion technology he had developed in the nuclear energy beta radiation energy concentration and conversion electric energy mechanism technology was.
At present, the top stealth coating materials in various countries account for less than 20% of the overall stealth of fighter jets.
However, the absorption of beta rays and gamma rays by the radiation gap reaches more than 40%. If it can be converted into the absorption of electromagnetic waves, then the invisible coating material produced by this new technology can be said to be
'Ultra-invisible material'.
If this 'super stealth coating material' is applied to fighter aircraft, the stealth effect of the fighter aircraft will not only be doubled, but also much stronger than before.
Although the stealth effect of a fighter plane does not entirely depend on the stealth coating material, but also on various factors such as aircraft model design, surface wrinkles, external protrusions, gaps in the fighter plane, etc., but at least there is no problem in catching up with or surpassing the American F35.
After all, among the various stealth factors of stealth fighters, coating materials are the most difficult to develop and innovate. Stealth coatings are also the first line of defense for a stealth fighter when scanning the opposite side with radar waves. Its importance is self-evident.
........
After thinking about it, Xu Chuan said: "Theoretically, it should be feasible to apply radiation gap technology to the absorption of conventional electromagnetic waves. However, it may be necessary to find the most suitable material that can maximize electromagnetic radiation.
absorption, and can meet the performance of fighter jets."
"I remember that fighter jets fly very fast in the sky, and the resulting high temperatures need to be addressed."
Hearing this, Academician Fan Pingbo of the Aviation Research Institute nodded and said: "Yes, when flying at high altitudes, fighter jets fly very fast and generate a lot of heat due to friction with the air, especially supersonic fighters, such as three-times-sonic fighter meters
Grid-25, the stagnation point temperature of the body surface is as high as over 500C at maximum speed.”
"It's not just high temperatures, it's also ultra-low temperatures."
"The current ceiling of mainstream fighter jets is about 20,000 meters. At this altitude, the ambient air temperature is about minus 55 degrees. In this environment, the impact of ultra-low temperature on the stealth coating also needs to be taken into consideration."
"In addition, there are other aspects that need to be taken into consideration when flying at low altitudes, such as friction with small floating objects in the air, such as dust, condensation nuclei, etc., as well as the viscous effect of airflow."
After a pause, Academician Fan Pingbo smiled and continued: "Of course, these things are things that need to be considered in aerospace. Professor Xu, you don't have to worry about these."
"Today, the first thing we need to confirm is whether this technology can be applied to the absorption of conventional electromagnetic waves. If it can, then we need to consider the follow-up."
Xu Chuan nodded and confirmed again: "Theoretically, this should be feasible, but I can't give much advice on coating materials."
"But based on my own considerations, I can provide two or three materials that may be suitable."
Hearing this, Fan Pingbo immediately sat upright and said solemnly: "You say it."
On the other side, Qin Anguo had already taken out a notebook from his bag, ready to record his words.
Xu Chuan cleared his throat and said: "Theoretically, graphene is a very suitable material. According to the characteristics of graphene, it can absorb electromagnetic waves, and the absorption efficiency is quite high. If it can be used to
If radiation gap graphene is made, I believe its absorption rate of traditional electromagnetic waves can be even higher."
This chapter is not finished yet, please click on the next page to continue reading the exciting content! "What is different from traditional magnetic loss characteristic materials is that this material absorbs infrared rays very efficiently. In the temperature range of 20-30 degrees,
Graphene itself has an infrared absorption rate of 16-14um wavelength of over 80%, which can greatly enhance the stealth performance of fighter aircraft."
"Considering that the high-speed flight of fighter jets will generate a lot of heat, graphene materials also have excellent heat dissipation properties, which can further improve the concealment effect of infrared detection."
"In addition, graphene can also maintain a stable form when faced with ultra-low temperatures below minus 50 degrees at an altitude of 20,000 meters..."
........
Throughout the whole day, Xu Chuan spent the whole day in the living room communicating with Qin Anguo and others about the 'radiation gap' technology.
Not only the types of materials that are suitable for stealth coatings, but also some keys to preparing radiation gap materials and some other things.
For Xu Chuan, like some scholars, he does not mind his knowledge being used in military affairs.
As the great man said, not having a sword in your hand is not the same thing as having a sword and not using it.
Force, no matter when, is the most basic condition to ensure one's own safety.
.......
After communicating in the villa for about two days, Qin Anguo took several experts and left, and Xu Chuan also adjusted his life back to normal.
The analysis of sterile neutrinos has been completed, and the next step is to contact them and make it public.
Turning on the computer, Xu Chuan skilfully found the mailboxes of Witten and others, and sent the analysis results he had made.
Others can't go to CERN now and can't hold a press conference there. For the time being, they can only deal with it in this way.
After finishing the email, Xu Chuan leaned back, leaning against the chair and looking out the window.
After hard work in the second half of last year, both the nuclear energy project and the Sichuan-Hai Materials Research Institute have entered a phased pause in their research and development.
The follow-up advancement of the former needs to wait until the research institute in Qidong is completed. The customized linear particle accelerator is still being manufactured urgently. Without the experimental site and equipment, the subsequent cycle cannot be started.
Of course, the testing of radiation gap materials is still in progress. Waiting for the testing to be completed, it will be around March. The research institute has also completed it, so it can continue naturally.
The latter, Chuanhai Research Institute, is currently applying for patents in various countries and researching lithium battery directions such as lithium-sulfur batteries and lithium-air batteries.
After all, after the problem of lithium dendrites is solved, not only lithium-ion batteries will make rapid breakthroughs, but lithium-sulfur batteries and lithium-air batteries will also see the dawn of hope.
The latter two are based on solving the lithium dendrite problem.
If possible, Xu Chuan hopes to take the development of the battery field into his own hands. This is a huge market, and there are still many untapped cakes.
As long as he seizes the lithium battery market, he won't have to worry about subsequent scientific research funds, at least in the short term.
Regardless of whether it is nuclear energy
After thinking for a while, Xu Chuan stood up, controlled the computer to connect to NTU's academic administration system, and submitted his name to the course arrangement application.
From the current point of view, he doesn't have much to do in the next month or so. In this case, it's time for him to pick up his job as a professor at Nanjing University.
That's right, from beginning to end, after he returned to China, his most essential job was as a mathematics professor at Nanjing University without even having a single day of class.
Whether it's a nuclear energy research project, a lithium battery project, or something else, it's all extra work outside of your job.
Thinking about it this way, I feel really sorry for the salary offered by Nanda.
At present, his salary consists of two parts. One part is the allowance issued by the state before returning to China. The special allowance of 12.5 million per year is paid directly without tax deduction or anything.
The other part is the salary of NTU professors, which is 3 million per year after tax. However, after winning the Nobel Prize, this salary doubled to 6 million.
These two parts are the basic salary, in addition to various benefits and subsidies.
As the first scholar in history to win both the Nobel Prize and the Fields Medal, aside from state subsidies, this salary is actually not very high.
However, Xu Chuan doesn’t really care about this. He is not short of money either. Lack of money refers to the lack of money for certain future research and development. For example, the subsequent research and development of lithium batteries by Chuanhai Materials Laboratory are basically based on
Tens of millions of dollars were thrown into it for the unit.
........
NTU, Academic Affairs Office.
A young teacher is sitting in the office arranging courses. Although school has started now, and each professor has submitted his own courses, after all, there are always some accidents in life, and some courses need to be temporarily adjusted. The Academic Affairs Office also has
A dedicated teacher or assistant is responsible for this.
"What the hell? Did I see it wrong?"
While arranging classes, the young teacher suddenly exclaimed, and several colleagues in the quiet office immediately cast curious eyes over him.
Rubbing his eyes, the young man in charge of arranging courses looked at the screen again. After confirming that he had read it correctly, he raised his head in disbelief: "Guess whose name I just saw on the academic administration system!"
"Xuchuan!"
"Kawasami actually submitted an application for the course!"
As soon as these words came out, there was a commotion in the office.
"you sure?"
"Xiao Xu, you must have read it wrong. Sichuan God is so busy, how can he have time to go to class?"
"I must have read it wrong. Chuan Shen didn't have a single class in the second half of last year. It's only the beginning of the year. How could he have time to start classes?"
In the office, other people started discussing.
No one in this office, or in the entire NTU, has heard of the name Xu Chuan.
At the beginning, many students, teachers, professors, and even people from other universities at NTU were looking forward to this master’s class. After all, this was the first-ever Nobel Prize and Fields Medal winner.
This chapter is not over yet, please click on the next page to continue reading! But with more expectations, there will naturally be more disappointments.
After this elder returned to China, although he took up a professorship at Nanjing University, he had not held a single class in the past six months or so.
Gradually, everyone no longer expected this expert to give lectures.
Of course, most people can understand it. After all, they are such top bosses, and they must have more and more important things in their hands.
No one expected that at the beginning of 2019, this elder would actually submit the course schedule.
Simply unbelievable.
.......
For the Academic Affairs Office, Xu Chuan's teaching arrangements are a big deal, especially since this is the elder's first lecture.
Because he couldn't believe it, the Academic Affairs Office made a special call to ask him if it was true. This made Xu Chuan dumbfounded when he received the call.
After confirming that the teaching courses were genuine, the staff of the Academic Affairs Office quickly arranged the matter and reported it to the school leaders.
At noon that day, the news was updated on the campus website, and students who were concerned about the course schedule immediately posted the picture to the school stone forum.
[Shit, I just checked the course schedule, guess whose name I saw!
】
【who?】
[Xuchuan! Sichuan God! In the latest class schedule announced by the Academic Affairs Office, there are actually Sichuan God courses! 】
[Don’t be ridiculous, it must be someone with the same name. That elder didn’t teach a single class last year.]
[No, I just consulted the teacher in the Academic Affairs Office, it’s true!]
【What the hell?】
【Fuck!】
[Really or not, Sichuan God has started classes? When, where, what day, what class? 】
[The day after tomorrow, Thursday, linear algebra and spatial analytic geometry, class at 2pm, one hour, in the public classroom of the West Building. 】
【receive!】
[Hiss~, the first class of Sichuan God is not to be missed! Where to register? 】
[It seems that there is no need to register. It is the same as taking open classes with ordinary professors? 】
[No need to register? Isn’t there a huge crowd here? It seems like you have to go there early the day after tomorrow to grab a spot.]