MTL - Into Unscientific-Chapter 477 Beggar's Gravity Gradient, Done!
“. Add a lattice as a relay?”
Hearing these words that came out of Xu Yun's mouth.
Including Huang Yuting and Ge Tongyou, everyone was stunned.
Huang Yuting faintly felt that she seemed to have caught something, but when she thought about it, there was nothing.
So she thought for a moment, and asked Xu Yun with a look of seeking advice:
"Dr. Xu, can I trouble you to explain in more detail?"
Xu Yun said no problem, walked to the LED screen on the desktop, pointed to the original structure diagram and said:
"Professor Huang, according to your original idea, the vector interaction point of the three-dimensional electrostatic field should be at the center of the conductor surface, right?"
Huang Yuting nodded:
"Exactly."
Students who have studied high school physics should know it.
There is an electric field around the charge, and there is a force between the charge and the charge. This effect is transmitted by the electric field.
An electric field generated only by stationary charges is called an electrostatic field.
High school physics books often use electric field lines to roughly describe the magnitude and direction of field strength. Electric field lines are a bunch of directed curves, and their density indicates the magnitude of the field strength.
That is, the denser the electric field lines, the greater the field strength, and the direction of its tangent indicates the direction of the field strength.
This is the introductory concept of electrostatic field, dead high school knowledge suddenly began to attack me. JPG.
However, although electric field lines are very intuitive, they are actually not accurate enough. It is just to make beginners think that physics is easy to learn and then get into the pit, for the convenience of beginners to understand.
Because there is an electric field at every point in space, but obviously you can't draw the electric field lines passing through every point.
In addition, it is somewhat vague to use density to express the magnitude of the field strength, so it is necessary to use formulas to accurately express the above characteristics.
The specific derivation process will not be repeated here. In short, the concept of field theory in multivariate calculus should be used, and finally the Gauss theorem of electrostatic field can be obtained.
The three measuring arms designed by Huang Yuting can be regarded as three axes, and form a symmetrical charged body of a spherical shell with the internal conductor on the vector.
This spherical shell symmetrical charged body conforms to Gauss's theorem of electrostatic field.
That is, the charge in the Gaussian surface is 0, and because of symmetry, it is impossible for a certain part to have a positive flux and a certain part to have a negative flux.
Therefore, the electric field inside the spherical shell is always 0.
Of course.
The 'spherical shell' here is a conceptual category. The axis space formed by the three measuring arms can be regarded as an equivalent model, not a real sphere.
The vector interaction point of the three-dimensional electrostatic field should be at the half point perpendicular to the Gaussian surface, that is, the center of the conductor surface.
Then Xu Yun organized some words, and continued:
"Look, Miss Huang, the solitary point particles are not charged, and the equipment for measuring modules is very light. The total weight of each module is 1145.14 grams."
"So from the perspective of the top view, the three measuring arms can be placed in a 120-degree interval similar to the Mercedes-Benz logo."
"A measuring arm has two measuring modules, and the field strengths received by the six measuring modules are equal to each other, so that a Laplace equation is established, then the boundary value condition V(R, θ) is 0 ∞(AlRl)Pl(cosθ)=V0(θ)”
Xu Yun quickly wrote down a line of calculations, and then continued:
“. Then replace x with cosθ according to the orthogonality of the Legendre polynomials, change the upper and lower limits, and then differentiate. Multiply both sides of the boundary value condition by a Lagrangian interpolation.”
During the previous press conference.
In order to be able to keep up with the calculation speed of the bosses, Xu Yun activated two thinking cards of Dirichlet and Eisenstein one after another.
With the assistance of two thinking cards.
At present, Xu Yun's calculation ability in mathematics has made a huge improvement, and it is not even much lower than his physics level.
If he continues to grow like this, he may become the next top all-rounder in mathematics and physics.
So fast.
An optimized equation is presented to everyone:
Rσ(θ)=0∞(lR(l+1)1R)(2l+1)∫0πV0(θ)Pl(cosθ)sinθdθPl(cosθ)σ(θ).
Here we go.
Even Li Hua, who is engaged in mechanical engineering, quickly understood what Xu Yun meant, and touched his chin thoughtfully:
"Dr. Xu, you mean to add a high-density lattice, and through the light-field-like effect of the lattice, the external field will be deflected away?"
Xu Yun nodded, indicating that he was right:
"Yes, Li Gong, although the lattice partial derivative can only achieve an approximate situation with a high value, the accuracy of our own measurement module is already very high."
"Even if he is asked to drop it by one. No, even two orders of magnitude, it can still reach the international advanced level in theory."
"It is entirely possible to truly eliminate the influence of the three-dimensional electrostatic field by performing density optimization and partial conduction cancellation again when conditions permit."
Hearing Xu Yun's words.
Huang Yuting couldn't help but look at Ge Tongyou, and both of them saw a thought in each other's eyes:
There is a door!
The electric field depends on the existence of mass, that is, as long as the three measuring arms operate, there will inevitably be a three-dimensional electrostatic field interference.
Huang Yuting's original idea was to form a balance through the internal conductor, but Xu Yun's idea was to directly correct the 'axes' of the three-dimensional field.
According to the general solution of the equation calculated by Xu Yun, it is not difficult to see.
A hexagonal lattice with a diameter and length L can theoretically deflect the three-dimensional field to a certain extent.
The more the number of lattices per unit area, the higher the degree of three-dimensional field partial conduction.
This general solution actually has a rudimentary form, that is, the on-off principle of the P-N junction.
The holes in the P-region are positively charged, and the electrons in the N-region are negatively charged. The direction of hole movement can be understood as the direction of current flow.
At the depletion layer.
There are a small number of freely moving electrons and holes that "neutralize" each other.
This balance is called dynamic balance. At this time, the three-dimensional field is corrected and hedged.
Of course.
For some rare students of LSP, the above sentence may only see the words acupoint, flow, and rush.
Facing the proposal proposed by Xu Yun.
Huang Yuting thought quickly in her mind for a while, then raised her head, and asked Ge Tongyou:
"Professor Ge, do you have a cabin here?"
"Of course."
Ge Tongyou nodded, walked to the table and fiddled with the screen a few times, and quickly called up an interface:
"That's it."
The log cabin that Huang Yuting mentioned is not a house made of wood, but a system developed by the Chinese Academy of Sciences for instrument design.
The function of the log cabin is somewhat similar to the 'Aurora' used by Xu Yun at the beginning, but the application field of Aurora is mainly in high-energy physics.
Other than that.
The real name of the cabin is actually called CASID, where CAS is the initials of the Chinese Academy of Sciences.
ID stands for InstrumentDesign, that is, instrument development.
The origin of the nickname of the log cabin has always been an unsolved mystery. It seems that it suddenly rose without warning around 1314, and then it became a log cabin after shouting. (If anyone knows the reason, you can keep an eye on it. I have been curious for several years, and no one has been able to answer it. They all say to follow others)
Xichang Satellite Launch Base is used as the base of domestic satellite research and development, and the supporting log cabin authority is naturally higher than that owned by Huang Yuting.
Therefore, she did not switch accounts, and just quickly entered the relevant parameters.
"Angle 120 degrees."
"Area ratio 37.8%"
"Pass section 17.23cm"
"Torque Coefficient 0.6657"
A few minutes later.
Huang Yuting raised her head suddenly, and said to Xu Yun and Ge Tongyou:
"Professor Ge, Dr. Xu, the equilibrium rate of lattice theory of 50X50 distribution is out, 98.54%!"
"The error in the measurement accuracy, especially the detection error in a small area like Yongling, can basically be ignored!"
Tongyou Ge was taken aback when he heard the words, and then a burst of joy and strong surprise appeared on his face:
"98.54%? The balance rate is so high?"
Ge Tongyou, who came from that era, always seeks stability in his work. In a sense, he is a pessimist, considering the worst outcome in everything.
Originally, he thought that it would be good if the balance rate can be stabilized at 95%.
After all, a 5% error is acceptable both in reason and technology.
The result was unexpected.
The balance rate calculated by Huang Yuting can reach 98.54%, which is really a surprise, which means that there is no need to consider other additional optimizations.
Looking at Tongyou Ge who was full of surprises, Huang Yuting turned her attention to Xu Yun again, and exclaimed:
"Dr. Xu, I didn't expect that you, a genius in theoretical physics and biology, can think so quickly in applied physics."
"If it weren't for the idea you came up with, I'm afraid it would be very difficult for us this time, at least it will take a few more days."
Xu Yun couldn't help touching his nose when he heard the words, but didn't speak.
really.
He is not an expert in applied physics, and he is not familiar with equipment construction, but the problem is.
In the previous rewards, there is a blueprint of the gravity gradient meter.
Although Xu Yun has to do the balance and measurement by himself, there are diagrams for the structure.
It’s just that Xu Yun’s major has no intersection with applied physics or structural design, so it’s always inconvenient to take it out.
But although the complete illustration is not easy to show, it is another matter to give a little suggestion on some details-even laymen have a flash of inspiration.
Mentioned earlier.
The three-dimensionalization of the gravity gradiometer is the future development direction, because the vertical Fzz error must be eliminated.
That is, the blueprint that Xu Yun got has a corresponding solution.
So Xu Yun easily took out this solution with a "flash of inspiration".
Of course.
The specifications of the lattice plates on the drawings are much higher than what can be manufactured at the Xichang launch base. It must be a dream for Xu Yun to achieve a 100% balance rate.
But even the figure of 98.54% is enough for them to deal with the next thing.
Afterwards, Huang Yuting discussed the feasibility of the plan with Ge Tongyou and others, and finally unanimously approved Xu Yun's proposal.
The first problem has been successfully resolved so far.
Then Ge Tongyou glanced at Li Hua beside him, and said to him:
"Old Li, I will trouble you about the crystal lattice."
"The preparation of the 50x50 lattice plate is difficult. Our center will definitely not be able to make it. It may require the cooperation of friendly units."
Li Hua nodded, with a firm tone:
"No problem, I will take care of this matter!"
Ge Tongyou did not name the specific cooperative unit, but there are not many companies that can produce 50x50 lattice panels, or there are only a handful of them.
Combined with the special strategic position of Sichuan Province, the unit Ge Tongyou refers to is naturally ready
After Li Hua left.
Huang Yuting, who was in a much better mood, returned to her original position, not at all tired, and said to Tongyou Ge with a smile:
"Professor Ge, the first problem you mentioned has been solved, what about the second one?"
"The second one."
Tongyou Ge raised his eyebrows when he heard the words, and the expression on his face was much calmer than before:
"The second question is relatively simple. According to the information we have learned, the Yongling Underground Palace is located deep underground, with a lot of water inside, and there are also a lot of various utensils in the underground palace."
"As for the "Yongle Canon" that Dr. Xu and the others are looking for, if I mean a hypothesis, assuming it really exists, it can only be located in the lower level of the underground palace."
"In this way, the structure of the gravity gradiometer needs to be fine-tuned."
“Otherwise, rapid changes in the solid-liquid region will inevitably affect the total current density, resulting in failure or even damage to the device.”
After Ge Tongyou finished speaking, Xu Yun also nodded.
Besides him himself, the world is still inconclusive about the existence of the "Yongle Dadian" in Yongling.
But one thing is for sure.
There must be a lot of accumulated water inside the Yongling Underground Palace, which has even submerged Duke Di.
Actually it’s not just Yongling.
Existing Ming Tombs No, it should be said that most of the existing emperor's mausoleums have different degrees of water accumulation.
The phenomenon of water ingress in the imperial tombs of the Qing Dynasty was even more serious. When Sun Dianying robbed the tomb, Qianlong's coffin even floated in the water for decades. The painting style is too beautiful to dare to look at.
And for the gravity gradiometer.
Although the state of solid-liquid coexistence will not affect the accuracy, it will affect the total current density—because it involves the support force of the rapid mutation state.
When the solid-liquid region changes rapidly.
The gravity gradiometer will have Meissner effect due to the change of the support force in the measurement area, that is, it is completely diamagnetic.
As a result, the total current density will increase or decrease.
Indeed.
The problem of the Meissner effect is easy to solve in the case of conductors or superconductors.
But don't forget.
Lone point particles don’t need conductors to move.
Not to mention that in addition to the accumulated water, there is a layer of unknown thickness between the existing underground palace and the underground palace that may store the "Yongle Dadian".
To detect the situation below the compartment, the gravity gradiometer is equivalent to going through three intervals:
The soil layer from the surface of Yongling to the top of the underground palace,
The interior of the underground palace is flooded with accumulated water of various utensils,
Another compartment between the underground palace and the next floor.
So if this problem is not solved, the gravity gradiometer is likely to be down.
But what made Xu Yun let out a sigh of relief.
This time without his action, Huang Yuting showed her strength in the gravity gradiometer.
The Zhenggao researcher at Jilin University thought for a few minutes, and then quickly came up with a solution:
"Professor Ge, this problem is very simple. We only need to add a small axle load meter and particle emitter to the measuring arm to solve it."
"The axle load meter is used to change the momentum of the system, and the particle emitter is used to break the Coulomb gauge—of course, the specific energy level needs to be calculated, but it is estimated that the tens of MeV levels should be about the same."
"In this way, the total current density can be hedged."
Xu Yun raised his eyebrows unexpectedly.
This idea is exactly the same as the optimization plan on the design drawings he mastered.
Huang Yuting's idea is equivalent to adding a "wingman" to the gravity gradiometer, and correcting the structure on the magnetic vector potential.
Because according to Bloch's theorem.
When the system is in the ground state, the total momentum should be 0, and the wave function should also maintain this rule in the external field.
The axle load meter added by Huang Yuting changes the momentum of the system and can cut off the excess current at any time.
The particle emitter can be used to destroy the Coulomb gauge, invalidate the Bogoliubov operator of the first term, and let the system enter a cooler steady state from the perspective of the first-order perturbation theory.
This mathematical model is different from Witten's superstring theory, and it can be completely reproduced in physical phenomena.
By the way.
If p=mveA/c is considered in this situation, the famous London equation can be obtained.
Exactly.
This is how the London equation came about.
The line of sight returns to reality.
After hearing Huang Yuting's idea.
Tongyou Ge also picked up a pen and started to calculate on the draft paper.
Although Ge Tongyou is very old now, and his eyesight and body are gradually beginning to decline, he can appear here because of Xichang's re-employment.
But for an old third-line guy like him, it is not difficult at all to do calculations.
Swish Swish Swish—
A line of operators was quickly written down.
This is his idea of trying to calculate whether Huang Yuting can fully achieve it in a physical situation.
ten minutes later.
Tongyou Ge put down his pen, looked up at Huang Yuting, then at Xu Yun:
"Professor Huang, Dr. Xu, this program has no problems in mathematics and my personal experience, and it is highly feasible."
"In other words."
"We can then consider the assembly of the gravity gradiometer."
Note:
Many readers are asking about the journal evaluation, which will probably start next month.
