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Chapter 477 Beggar's Gravity Gradient, Done!

". Add a lattice as a relay?"

Hearing the 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 face 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:

"That's right."

Students who have studied high school physics should know it.

There is an electric field around the charge, and the force between the charge and the charge is transmitted by the electric field.

An electric field generated only by static charges is called an electrostatic field.

Electric field lines are often used in high school physics books 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 to say, the denser the electric field line is, the greater the field strength is, 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 the electric field lines are very intuitive, they are actually not accurate enough, 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 electric field lines passing through every point.

In addition, it is somewhat ambiguous 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 to say, the electric charge in the Gaussian surface is 0, and because of the symmetry, it is impossible to have a positive flux in a certain part and a negative flux in a certain part.

Therefore, the electric field inside the spherical shell is always zero.

Of course.

The 'spherical shell' here is a conceptual category, and the axial space formed by the three measuring arms can be regarded as an equivalent model, not a real sphere.

And the vector interaction point of this 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:

".According to the orthogonality of Legendre polynomials, replace x with cosθ, change the upper and lower limits, and then differentiate. Multiply both sides of the boundary value condition with a Lagrangian interpolation."

During the previous press conference.

In order to be able to keep up with the computing 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 soon.

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 Xu Yun's meaning, and touched his chin thoughtfully:

"Dr. Xu, you mean to add a high-density lattice to deflect the external field through the light-like field effect of the lattice?"

Xu Yun nodded, indicating that he was right:

"That's right, 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 allowed 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, both of them saw a thought in each other's eyes:

There is a door!

The electric field depends on the existence of the 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 deflection.

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 in which the holes move can be understood as the flow direction of the current.

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 offset.

Of course.

For some rare students of LSP, the above sentence may only see the words acupoint, flow, and rush.

Facing the plan proposed by Xu Yun.

Huang Yuting thought about it 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 there is."

Ge Tongyou nodded, went to the table and fiddled with the screen a few times, and quickly called up an interface:

"That's it."

The cabin 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 field of use of Aurora is mainly in high-energy physics.

Other than that.

The real name of the cabin is actually CASID, where CAS is the initials of the Chinese Academy of Sciences.

ID stands for Instrument Design, 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 cabins are naturally higher than Huang Yuting's.

Therefore, she did not switch accounts, and just quickly entered the relevant parameters.

"The angle is 120 degrees."

"Regional ratio 37.8%"

"Pass section 17.23cm"

"Torque Coefficient 0.6657"

A few minutes later.

Huang Yuting suddenly raised her head, 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, is basically negligible!"

Ge Tongyou 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, in his mind, it would be good if the balance rate could be stabilized at 95%.

After all, a 5% error is acceptable both rationally and technically.

The result was unexpected.

The balance rate calculated by Huang Yuting can actually reach 98.54%. This 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, it would be very difficult for us this time, at least it would take a few more days."

Xu Yun couldn't help touching his nose when he heard this, but didn't speak.

really.

He is not an expert in applied physics, and he is not very familiar with the construction of equipment, 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 doesn't overlap with applied physics or structural design, so it's always inconvenient to take it out.

But although the complete diagram is not easy to show, it is another matter to give a small suggestion on some details-even a layman has 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.

In other words, the blueprint that Xu Yun got had a corresponding solution.

Therefore, 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. Xu Yun's desire to achieve a 100% balance rate must be a dream.

But even the figure of 98.54% is enough for them to cope 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."

"It is difficult to prepare the 50x50 lattice plate. 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.

Coupled 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 Ge Tongyou with a smile:

"Professor Ge, the first problem you mentioned has been solved, what about the second one?"

"The second one."

Ge Tongyou 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. There is a lot of water inside, and there are a lot of various utensils in the underground palace."

"As for the "Yongle Canon" that Dr. Xu and the others are looking for, assuming 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, leading to device failure or even damage."

After Ge Tongyou finished speaking, Xu Yun also nodded.

Except for him himself, the world is still inconclusive about the existence of "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.

In fact, it's not just Yongling.

The 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.

Due to the change of the support force in the measurement area, the gravity gradiometer will have the Meissner effect, 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 particles do not need a conductor 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 Gradient.

The Zhenggao researcher at Jilin University thought for a few minutes and 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 has 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 to physical phenomena.

By the way.

In this situation, if p=mveA/c is considered, the famous London equation can be obtained.

That's right.

That's how the London equation came about.

The line of sight returns to reality.

After hearing Huang Yuting's idea.

Ge Tongyou 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 declining, he can appear here because of Xichang's re-employment.

But for a third-line veteran like him, it's not difficult at all to do the math.

Swish Swish Swish——

Lines of operators were quickly written down.

This is his idea of ​​trying to calculate whether Huang Yuting can fully achieve Huang Yuting in a physical situation.

ten minutes later.

Tongyou Ge put down his pen, looked up at Huang Yuting, and then at Xu Yun:

"Professor Huang, Dr. Xu, this plan 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.

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