At first glance, this anti-gravity high-speed rail and maglev train seem to be similar, but in fact, there are differences.

In terms of technology, the technical content of anti-gravity is much more sophisticated than that of maglev trains.

Magnetic levitation realizes contactless suspension and guidance between the train and the track through electromagnetic force, and then uses the electromagnetic force generated by the linear motor to pull the train to run.

This technique, in fact, is not difficult.

But anti-gravity technology is much more sophisticated, and it is the gravitational force that controls the four fundamental forces of the universe.

Electromagnetic force, which is the four fundamental forces of the universe, cannot be compared with anti-gravity technology unless it also enters the stage of controlling electromagnetic force.

More importantly, under the conditions that anti-gravity technology has been developed, anti-gravity high-speed rail is more practical than maglev trains.

If the maglev train wants to become a daily means of transportation for the people like today's ordinary wheel-rail railway, it is basically far away.

What is the reason for this?

The first is the security aspect. Since the maglev system must be supplemented by electromagnetic force to complete the levitation, guidance and drive, the safety of the train in the event of a power failure cannot but be a concern.

In addition, when operating at high speeds, the stability and reliability of the train also need to be tested in the field for a long time. There are also technical difficulties in construction. Since the train needs to be suspended at a specific height when running, the requirements for the flatness of the line, the amount of subsidence of the roadbed, etc. are very high.

In addition, how to avoid the impact of strong magnetic fields on the human body and the environment must also be considered.

At that time, the citizens of Shenzhen, Guangdong Province, rebelled and shouted in front of the Shenzhen Metro Building, opposing the plan to adopt elevated maglev for Metro Line 8.

At that time, there were many residents in Luohu Liantang and Yantian, and the subway was originally built for convenient transportation, and the mag suspension load limit was limited, so during the peak period of commuting and holidays, was it not used at all?

In addition, many countries have issued standards for the magnetic induction intensity of electromagnetic fields, the most stringent of which is Switzerland, whose standard is 0.2μ/T. If Swiss standards are adopted, 500 meters on both sides of the maglev road may not be enough.

The second is a huge loss, Shanghai maglev loses billions of dollars every year, no one rides, and the cable laid in the whole line of the maglev project is an ordinary aluminum core high-voltage cable imported from Germany, which will produce 20KV high voltage after receiving electricity.

Experts reminded relevant departments to pay attention to the safety of construction around the project and strengthen the protection of cables along the line to prevent accidents.

Even if there are ways to solve the above technical problems, there is another problem involved - money. The design investment of the approximately 30-kilometre Shanghai section is 100 billion yuan, while the two German lines, one 36.8 kilometres long, will cost around 2.6 billion euros and the other 78.9 kilometres will cost 3.2 billion euros.

In the actual construction, according to the terrain, road surface and design transportation capacity, of course, the cost will vary greatly. But in any case, a one-kilometer route requires an investment of at least 800 million yuan, that is, a 1-centimeter line needs to cost 8,000 yuan to build.

If a Beijing-Shanghai maglev railway is completely built, the investment is very amazing. China's four major century projects, namely the Three Gorges Project, the West-East Gas Pipeline, the South-to-North Water Diversion, and the Qinghai-Tibet Railway, add up to a pittle of the total investment and cannot afford them.

The huge amount of electricity consumed alone means that all the existing power plants along the line are not enough to supply power to the railway alone.

It boils down to two things: security and profitability.

Of course, this is also because of the scope of electromagnetic force control technology. Because the electromagnetic force control technology is not good, a large number of magnetic levitation coils, signal control systems along the line and so on can only be used.

If the electromagnetic force control technology also has a great breakthrough like the anti-gravity technology, it directly regulates the electromagnetic field of the entire earth to guide the medium.

Just like Magneto in the movie, controlling the entire earth is not a problem.

This is also one of Ji Zhen's future research directions, and he will study the four fundamental forces of the universe: gravity, electromagnetic interaction force, weak interaction force, and strong interaction force one by one.

The current Ji Zhen is only above gravity.

In addition to this gravitational force, quantum mechanics naturally succeeds in describing three other fundamental forces: electromagnetic, strong, and weak.

Therefore, in the future, Ji Zhen, after solving this gravitational control technology, will move to quantum mechanics.

Finally, the superstring theory was used to unify the two major theories of physics, quantum mechanics and general relativity, and to create a theory of everything that describes the entire universe.

Through a series of time and space travels, Ji Zhen is still very interested in superstring theory, and he also feels that this is the right path.

Far from it.

In short, the current maglev train is still not as practical as the anti-gravity high-speed railway.

···

"What are you thinking?"

After recording "Everyday Upward", Xu Linfei and Ji Zhen got on the plane and returned to Yanjing.

Even if Xu Linfei still wants to record "Mars Intelligence Agency", the location of the recording show is also in Yanjing, not Changsha.

"The questions they asked at the show made me think, although the anti-gravity high-speed rail is now more practical than the maglev train, but the maglev train based on electromagnetic force is still very promising."

"So, I'm thinking about electromagnetic research."

Although Ji Zhen is a professor in the Department of Physics, and electromagnetism also belongs to physics, he doesn't know much about it. His previous research focused on classical mechanics.

Xu Linfei asked, "Is this what you thought about changing disciplines before?" ”

Ji Zhen smiled, "That's not it, the change I wanted before was the life science branch of biology." ”

"Oh?" Xu Linfei sat on the plane and immediately became interested, "Physics and biology do have a big span, and it's good to change your mood." ”

"I had previously considered basic medicine and drug development in medicine, but then I rejected it."

"I didn't study medicine, so I didn't know anything about basic medicine. And the time for drug research and development is too long, generally in ten years. ”

Xu Linfei nodded, "This is indeed not similar to your husband's style." Even anti-gravity technology has not been more than five years old. ”

"However, I've heard that biology is a big pit!"

Ji Zhen smiled, stretched out his finger and pointed at the tip of Xu Linfei's nose, "That's for other people, and for your husband, it's not too difficult." ”

Xu Linfei opened her mouth to bite Ji Zhen's finger, but Ji Zhen withdrew his hand.

"Can you tell me what technology you're going to work on?" Think about the achievements of your husband now, each of them is earth-shattering and can change the world.

So, this time, she wanted to know what kind of big news her husband was going to do.

"Human Sleep Technology!"