In August, the temperature in Helsinki is a few degrees lower.
During the day, when Zhuo Huan and old Joseph went to the laboratory to conduct magnetization experiments on the Les Royce motor, there was a hazy drizzle in the factory area. At night, there is a bit of bone marrow chill.
August in the northern hemisphere should be the hottest time of the year. To be precise, it should be the second hottest month. The temperature in the mainland reaches its peak in July, and it is slightly cooler in August, but it should not be more than ten degrees.
"Helsinki, latitude 60°N," Fu Cheng looked into Zhuo Huan's eyes, "In fact, it is very close to the Arctic Circle."
Only in the Arctic Circle can the low temperature of ten degrees be reached in August.
Zhuo Huan leaned back on the back of the swivel chair, exerted a slight force on his waist, and the adjustable back of the chair was bent backward by 15°.
He looked up at the black-haired young man in front of him, and the two looked at each other silently.
Suddenly, Zhuo Huan stood up. The wheels of the swivel chair made a slight rubbing sound on the ground, and he walked around his large desk and walked towards Su Fei. When he walked around Fu Cheng, he didn't lift his eyes, he directly took a piece of chewing gum from the messy pen container on the table, and stuffed it into Fu Cheng's hand.
Because it was stuffed when it was very close, it was not seen by others, only Fu Cheng was holding the piece of chewing gum in a daze.
He turned around.
Zhuo Huan walked to Su Fei's table, crossed his arms and sneered.
"Don't hide, your face is so big, the computer screen can't hide you."
Su Fei: "Fuck! This is a 27-inch monitor, 27 inches!" Can my face be this big
Zhuo Huan clicked his tongue, curled his fingers, and tapped his knuckles on the table a few times: "Find out all the weather reports in the Arctic Circle from December 19 to 20, 2019. In three minutes, I will show you on the big screen." See all the info here."
Su Fei: "..."
Does Finland have a law on the protection of minors
In front of Zhuo Huan, the baby-faced minor cursed and tapped the keyboard quickly, picking up the weather report on the Arctic Circle on the day of the air crash from the weather websites of various countries. Two minutes later, he pressed the "enter" key vigorously, and said triumphantly, "It's done!"
In an instant, dense weather reports were projected onto the large screen in the center of the investigation headquarters hall.
Zhuo Huan said impatiently: "The magnetic field parameters are the priority, and they will be screened out."
Su Fei whispered: "You didn't say that just now."
It took five minutes to extract all the magnetic field parameters and compile them into a graph. Everyone gathered in front of the big screen to observe this magnetic field change curve. Su Fei wasn't idle either, geniuses never just follow other people's instructions. He fixed his eyes on the monitor and spent another ten minutes making a full three-dimensional magnetic field line map.
Cut the earth in half to create a three-dimensional image of the northern hemisphere. Then, according to the magnetic field strength of the Arctic Circle calculated by various countries on that day, a curved line of magnetic induction is drawn in the illusory midair.
The disordered magnetic induction lines are like pitch-black balls of wool, making one's scalp numb.
However, some parts of these magnetic field lines are blank.
Fucheng looked at Su Fei in surprise, and before he could speak, Su Fei understood what he meant, and raised his hands: "Don't look at me, this is a simulated map of magnetic induction lines roughly drawn according to the weather reports of countries around the world .”
Fucheng: "The magnetic induction line is a closed curve. Not only are these places not closed, but there is also a lack of magnetic field."
Su Fei also felt bitter: "You can't blame me for this. There are only a few countries in the world that measure magnetic field parameters in weather reports, and even fewer in the Arctic Circle. I have already put Huaguo and the United States out of the Arctic The weather reports of countries in the Arctic Circle are all included, that’s all. Not every country is so rich and powerful, they are not in the Arctic Circle, and they still care about the polar climate.”
The Arctic Circle is a huge area. If it is not a laboratory dedicated to polar climate research, no one will measure the magnetic field strength in the Arctic Circle.
"It's not necessary to count all the magnetic field strengths of the entire Arctic Circle, it's not realistic." Old Joseph looked at the magnetic induction line map on the screen, touched his chin, looked at Zhuo Huan, and asked directly: "Is there any?" Is it possible?"
Zhuo Huan's eyes quickly crossed the lines of magnetic induction.
The magnetic induction line is a kind of closed curve artificially designed by human beings in order to simulate the illusory magnetic field.
The denser the magnetic field lines, the stronger the magnetic field strength.
The whole earth is like a huge magnet. Lines of magnetic induction pass through the center of the earth from the North Pole to the South Pole; then fly from the South Pole to the sky, pass over the equator, come to the North Pole, and pass through the center of the magnetic field. So far, a complete magnetic field loop is formed.
Zhuohuan looked at it for a long time, then looked away. He said directly and quickly, "The possibility is infinitely close to zero", and then turned his head to look at Fucheng: "Have you ever flown a polar flight?"
Fu Cheng: "Fly over."
Zhuo Huan: "Then you should know that once the magnetic field is too strong such as a magnetic storm, the polar flight will choose to make an emergency landing."
Su Fei was confused. He is not a professional pilot, nor is he an aircraft designer.
Lina looked at his bewildered expression, smiled and explained to him: "You didn't realize when you flew from Shanghai to Helsinki, when you fly to the Arctic Circle, the flight attendants will forcefully close all the visors, and passengers are not allowed to open them privately? This is because cosmic radiation is too strong in the Arctic Circle, which will cause great damage to the human body. It is good to close the visor to block the radiation a little bit."
Old Joseph also said: "Yes, when I flew to the polar regions, I made forced landings several times. Once a magnetic storm occurs, the communication system and instruments of the aircraft will be affected, and a temporary forced landing is required."
Speaking of this, old Joseph secretly looked at Zhuo Huan.
In fact, when Fucheng put forward the hypothesis of the magnetic field influence of the Arctic Circle, he realized that it was almost impossible to be the cause of the accident. But he didn't expect that Reid would make such a mistake. Knowing that once a magnetic storm occurs, the plane will definitely react on the spot, and the accident will not happen until it is about to land, but he still listens to Fu Cheng's words and asks Su Fei to make a three-dimensional map of magnetic induction lines.
Fu Cheng looked at Zhuo Huan fixedly, his eyes were calm and firm: "This is the only explanation."
Zhuo Huan glanced at him, and the next moment, he turned to look at Old Joseph.
Zhuo Huan: "I said that the possibility is infinitely close to zero, but I don't mean that there is no possibility."
Old Joseph was stunned: "Ah?" After a pause, he emphasized: "But if the magnetic field is too strong, the plane will definitely make an forced landing or return. JAL JL917 does not."
Fu Cheng: "This is the strangest place."
Old Joseph: "Strange what?"
"December 19, 2019 is the day when the geomagnetic field erupts once in 38 years. This eruption came without warning, and meteorologists did not predict it in advance." Fucheng asked Su Fei to make an emergency landing on the Arctic Circle in the past year. The flight of the plane projected on the big screen, "Look, when the geomagnetic field is not strong, there are two planes that make an emergency landing in Russia almost every month. But on the day when the geomagnetic field is the strongest, JAL JL917 is carrying A strong magnetic field, no forced landing in Russia, and no report to air traffic control about the damage to the plane. This is only one possibility."
The voice paused, and Fucheng said word by word: "This plane is not affected by geomagnetism at all, or its pilot doesn't feel that he has encountered a strong magnetic field riot that has never been seen in 38 years."
Su Fei asked strangely: "Didn't we encounter a magnetic storm? How could it be possible? The next day, major weather programs around the world reported that a strong magnetic disturbance occurred in the North Pole, and the number of aurora outbreaks broke the record. When I was collecting weather reports just now, I saw Lots of press coverage."
Fucheng turned his head to look at Su Fei: "Why is it impossible? If the plane was affected by the magnetic field at that time, the pilot would have reported to the air traffic control on the spot. But they didn't. On the day when the magnetic storm was the strongest, the plane flew smoothly and could Landing, this is the first doubt."
Fu Cheng walked to Zhuo Huan's desk and picked up the interview records of the survivors that he had just put on his desk, "And the second doubt is this: 65 people confirmed that they saw the aurora with their own eyes. Then the question comes, in the How did they see the aurora outside the plane with the visor down?"
Old Joseph was startled, he took the interview records in Fucheng's hand, and quickly flipped through them all.
"I saw a beautiful aurora appear on the left side of the plane. 』
"A green aurora appeared outside the plane. 』
"We sat by the window and looked to the left and saw a long and narrow aurora. It looks like a green ribbon, Ami said, this is the first time she saw the aurora, it must be a good omen, maybe we can really meet Santa Claus when we go to the Arctic Village... 』
Old Joseph suddenly raised his head: "Why?!"
Everyone was discussing the influence of geomagnetism on JAL flight JL917. Only Zhuo Huan stood in front of the big screen, stretched out his hand, and sketched the magical curves created by nature.
He slowly closed his eyes, and the lines projected on the screen surfaced in his brain and appeared in front of his eyes.
Behind him, Fu Cheng raised a question, and was then asked back by Old Joseph.
His lips parted slightly, Fucheng wanted to say the answer, but he didn't know how to answer Old Joseph.
He can find doubts, but he can't answer them.
Why did JAL JL917 not make an emergency landing on the day when the magnetic storm was the strongest, and did not report that it encountered a strong magnetic field.
Why did the passengers pass through the visor and see the aurora when it should have been lowered.
The black box can only record data from the thirty minutes before the crash.
It failed to record the moment when these passengers said they saw the aurora, and it could not tell everyone present why this weird and bizarre air crash happened.
"second question… "
Everyone turned to look at the man standing in front of the big screen.
He has a straight figure, and when viewed from behind, the shoulders and waist form a perfect curve. No one can imagine that this is a great aircraft designer, not a model.
The slightly long hair was tied casually behind his head, Zhuo Huan didn't look back, he raised his hand, and vigorously tapped with his index finger on a place where the magnetic induction line was blank.
"The second question, the answer: the aurora appeared in a place where there is no need to put a sunshield, so they saw the aurora." Zhuo Huan turned around, with a strong and unquestionable aura, "The plane has already left and needs to put a sunshade boards, so flight attendants no longer prevent passengers from opening the visors.”
After a brief surprise, Fu Cheng and Old Joseph suddenly realized.
Old Joseph understood: "Because of the violent magnetic storm, the aurora also erupted in the airspace outside the regulations. It turned out to be like this! Yes, it can only be like this. The aurora eruption is too dense and too wide, and it is seen every 38 years. So in safety You can also see the aurora after opening the shading plate.” After a pause, the old Joseph looked at Zhuo Huan again: “But Reid, if the second answer is like this, then it can’t explain the first question—meeting such a strong Magnetic storm, why the aircraft did not experience communication disturbance, and why... "
"It didn't crash on the spot."
After the old Joseph finished speaking, everyone in the investigation headquarters looked at Zhuo Huan, waiting for him to give a reasonable answer.
Fu Cheng quietly looked at the man standing in front of the projection screen.
He was wearing a very casual T-shirt with a black jacket tied around his waist, somewhere between lazy and leisurely.
Compared with other investigators in suits and ties present, he was more like an artist, eclectic and uninhibited. No dainty jeweled bow ties, no waxed hair.
However, Fucheng knew that this person would definitely give an answer. He believed it for no reason.
This belief is both foreign and familiar.
He picked it up from the end of the swamp from the depths of his memory, and it was covered with black mud. When they touched it, the person's ruthless announcement and countless people's crying and desperate cries rang in my ears.
However, it stands in the dark depths and still shines brightly.
It turned out that from the beginning to the end, he never abandoned his trust in this person.
Not even for a second.
Fu Cheng pursed his lips, he lowered his head calmly, hiding his tightly clenched fingers.
Unaware of the darkening eyes of the black-haired young man, Zhuo Huan stretched his right hand behind him and tapped on the big screen. His expression was indifferent and relaxed: "There is a specialization in the art industry. Professional matters should be left to professional people to solve. There is one person who may know the answer to this question—"
Su Fei asked curiously: "Who? Can he know what you don't know? There are times when you don't know, which expert can make people go downhill, come and listen."
Zhuo Huan glanced at him, and paid him no heed.
He walked to the printer and took a document from the exit of the printer. Only then did everyone notice that before Fu Cheng went to Zhuo Huan to give his opinion, this man seemed to have been searching for information, and even printed out a copy.
Zhuo Huan threw this document on the table.
Everyone looked at it one after another.
Hysteresis Nonlinear Dynamic Model of Deterministic Magnetic Current Actuators
Author: Teiichi Tsuna.