People rely on the aid money to live in the courtyard

Chapter 418 Arrest
Yi Chuanzong took the previous document and looked at it.

At a glance, he was a little proud. He really deserved to be him, no matter how the measurement error was less than five microns.

But when he saw the back, Yi Chuanzong's expression was stunned.

There was a monotonous page overnight at the back of the file, with a big red star in the middle!

Yi Chuanzong raised his head blankly, "This is?"

"Don't take a look?" Director Yang smiled teasingly, and then said, "Let's take a look, you kid has a mission."

Needless to say I know it too!
Yi Chuanzong rolled his eyes in his heart, a big red star appeared in his document, this matter was not simple at first glance.

This is the mission!

Yi Chuanzong frowned and opened the file to reveal his skills. It was normal for him to come to the task. He would definitely not refuse such an abnormal production task.

After some reading, Yi Chuanzong raised his head and said with a serious face: "Redefining weight?"

Nowadays, the big K is the International Prototype Kilogram (IPK), which is a platinum-iridium alloy cylinder.It is sealed in three nested glass bell jars and stored in a vault inside the International Bureau of Weights and Measures (BIPM) in Sèvres, France.Also known as weights.

Director Yang nodded earnestly, "Yes, this is a task arranged by the superior. There is no hard requirement for this matter, you just need to do your best."

"Although it is not clearly stated above, as an engineer who has passed the exam, you should know the meaning of redefining weight. Force is the basis of everything, and highly calibrated weight parameters are extremely important. You must do your best to complete this matter! "

Yi Chuanzong didn't speak, but frowned and continued to look at his task.

In this regard, he knew something about it in his previous life.

Weight is not so easy to determine, although the Big K is stored in a highly controlled environment, its weight will still change very slightly.

To solve this problem, scientists around the world have spent decades debating how to define the kilogram in terms of natural, universal constants.

Now to redefine!One can imagine the difficulties.

In 1962, Brian Josephson proposed the Josephson effect related to voltage measurement.

Before accepting this new definition, there are also some requirements.At least three experiments must yield measurements with a relative standard uncertainty not exceeding 95 parts per billion, and at least one of these measurements has an uncertainty not exceeding [-] parts per billion.All these values ​​must agree within a statistical confidence level of [-]%.

NIST's final submission of the redefined SI measurement of h has an uncertainty of 9.1 parts per billion.Another measurement, from a Kibble scale at the National Research Council of Canada (NRC), had an uncertainty of just [-] parts per billion.Two other Kibble scale measurements, including by the French National Metrology Laboratory (LNE), also achieved the required accuracy.

In addition to the Kibble balance, another method for calculating Planck's constant was proposed in that paper - using the mass of a silicon atom to define the kilogram, by calculating 1 kilogram of ultrapure silicon-28 (silicon's most abundant isotopes, containing a total of 28 protons and neutrons) the number of atoms in a sphere.

And the shape of this pure silicon object is the roundest sphere!

This ball request is even more exaggerated!
From a palm-sized silicon ball to 12756km, a palm-sized silicon ball is 10cm in diameter, which is equivalent to 0.1m, 12756km=12756000m, and the error is only 14 times, which is equivalent to an accuracy of 1% microns!

In layman's terms, if it is enlarged to the size of the earth, the error between the highest point and the lowest point of the ball will not exceed 14 meters!
"High centrifuge? Can you guarantee the purity of the sphere?"

The corner of Yi Chuanzong's mouth twitched violently. To ensure this precision, the higher the purity of silicon, the better.

It can guarantee the purity of the atoms. I'm afraid this centrifuge is not used to centrifuge uranium!
There are extremely smart people in every country. Although this method did not appear until many years later, it does not rule out that people in other countries have discovered it, and even secretly calculated it, and planned to create it, or created it without making a fuss.

However, he was very surprised to receive this kind of task, it was beyond the times!

The stored weight has not been moved by anyone yet. At this time, some people consider that the weight will become lighter?And get ready to redefine weight.

difficult!
Too hard!

Yi Chuanzong couldn't help shaking his head, frowning tightly.

"Why, boy, are you sure?" Factory Manager Yang asked a little impatiently. The leader was also very serious when he told him, and naturally he took it more seriously when he came to his side.

"Sure?" Yi Chuanzong frowned, then shook his head, "I'm not sure. It can even be said to be impossible."

"Impossible?" Director Yang looked worried, "So it can't be done?"

"You can't say that. You can try my words, but this matter is not as simple as you think. It's not just a matter of precision. What's more important is weight!" Yi Chuanzong said with a sigh.

"What do you mean?" Director Yang's eyes lit up and asked, "You mean there are other conditions?"

Yi Chuanzong nodded slightly, and said seriously: "0.01 microns, I can challenge this precision, and it is possible to complete it with luck. But 10^-8m... the diameter of an atom is only 10^-10m, an object with a diameter of this level The corresponding is naturally micrograms!"

He smiled wryly and said, "The weight of a grain of dust is at the microgram level. If I spit it out in one breath, it will affect the weight. If the exhaust gas from the chimney in our factory sticks to it, it will exceed the standard. In this case, it is impossible for me to complete this task." task."

Director Yang's expression was startled, and then he leaned back on the seat, and said in a deep thought: "What you said makes sense, even under this kind of interference, the standard may not be standard."

The office fell into silence.

Neither of them spoke. Director Yang was still thinking about how to proceed with this matter. This was not an easy task at the beginning.

Yi Chuanzong didn't say a word, he was very confident in his technology, the error of other fitters can be controlled within a few microns, this is already the limit, the closer the accuracy is to 1 micron, the more luck is needed.

He is different, he can control the accuracy of 1 micron with his hand, and his full shot may only be 0.1 micron, or 0.05 micron and so on.

However, he also needs luck and touch. It is uncertain when it will be completed, but at least there is a good chance to complete it.

If it doesn't work once, it's twice, and if it doesn't work twice, it's ten times. He produces faster, so he doesn't worry about trial and error.

"How sure are you?" Factory Manager Yang asked, "You kid always hides it. This task is very important. You and I have been through it. If you are sure, I will continue to apply for you."

Yi Chuanzong frowned, and said: "If there is no problem with the raw materials and the production environment, I have an 80% probability of completing it in one year, and a 50% probability of completing it within half a year. If the time is halved, I The success rate will also decrease, this is a matter of probability and luck!"

Factory Manager Yang lit a cigarette and fell silent again, lost in thought.

Yi Chuanzong didn't make a sound to bother him. It didn't make much difference to him whether he took the task or not, and it didn't even make much difference to others. The current technology has not yet developed to that point, so he doesn't really care about it subjectively.

After about ten minutes, Director Yang said, "I will report this matter to my superiors. You are waiting for the notice during this period. Take your certificate and go."

"Okay, Uncle Yang."

Yi Chuanzong nodded, picked up a stamped 'engineer certificate' next to him and left.

It takes more than an hour to complete today's production task.

On the way home, Yi Chuanzong looked thoughtful, and many people greeted him, but he also looked absent-minded.

All the way back home, Yi Chuanzong sat at the table drinking tea silently, while the two cubs babbled.

"came back?"

Lou Xiaoe was teasing the two cubs, she turned her head and greeted her, then raised her hand again to pinch her son's little face.

But she didn't get a response for a long time, but her hand stopped suddenly in mid-air, she turned her head and looked at Yi Chuanzong seriously, her man's pensive look was rare.

'Is there anything else that can bother you?What happened? '

"Hello!" Lou Xiao'e scolded, "What are you thinking?"

Yi Chuanzong came back to his senses, and said casually: "Well, I'm back. I have a task today, and it's not easy."

"Mission? What mission?" Lou Xiaoe asked curiously, leaving behind her two sons who wanted to stand up, she walked over and sat beside Yi Chuanzong.

“怎么说呢？”易传宗摸着自己的下巴沉吟道，“你上称之后有118斤3两9钱，要是当猪肉卖可能需要77块6毛3分。但实际上这个重量可能并不是那么准确，甚至这换成钱也也只能精确的分。”

Lou Xiao'e clenched her fists and gritted her teeth. This bastard not only thought she was fat, but also dared to call her a pig!

"It's okay to simply buy a piece of meat and weigh it on a scale, but if it is used in a scientific research project, then this kind of accuracy is not enough. My task this time is to redefine this weight. Although it has not been set yet, I feel that it is very important. There is a high probability that I will accept this task, and it will be very troublesome later, I am thinking about how to complete it!" Yi Chuanzong said solemnly.

Lou Xiaoe looked at him suspiciously for a while, and then punched him suddenly, "Don't try to lie to me! Is this why you scolded me?"

"There is a mission!" Yi Chuanzong said seriously.

"There is a mission and I haven't come down yet! Watch it!" Lou Xiao'e pounced on it.

Yi Chuanzong raised his eyebrows slightly. This tiger girl obviously needed to be cleaned up. Without saying a word, he pressed Lou Xiao'e on the bed with one hand, got up and walked outside, "I'll get in the door."

The corners of Lou Xiaoe's mouth curled up slightly, she turned over and looked at the two cubs, she said softly, "Baby, it's time for you to sleep."

……

Three days later.

After Yi Chuanzong finished his get off work, he left work slowly.

"How did Li Hao's grandson survive recently? Even if I passed the engineer assessment, but the position has not changed, he should come to trouble me. '

'Weird, strange! '

Yi Chuanzong's eyes were full of thoughts. He found that Director Li's movements began to become smaller. It was obvious that the black box operation became more and more proficient, or he found the right way. Everything tended to be stable, and naturally there would be no more the wind.

"Yi Chuanzong!"

A cold drink came from the gate, suddenly, Yi Chuanzong was shocked, not because he had done anything wrong, but mainly because the voice was familiar to him.

Head up.

Yi Chuanzong rolled his eyes, and a group of young men in youth attire walked into the factory in a mighty manner. The young man at the head had a cold complexion, frowning tightly, with worry hidden in his eyes.

"I said, buddy, what's wrong with you? If you look for me in the morning, you will find me, and you will bring so many friends with you." Yi Chuanzong was very surprised, and looked at the people around him calmly. Except for Zong Lie, he was alone I don't know them. The faces of these people are very serious. He almost thought he had committed something.

"Where have you been for the past three days?" Jing Yi asked with a serious face, with an interrogative tone in his tone.

Yi Chuanzong's face was confused, "What can I do? Go to work, eat, take pictures of my wife, and watch the children. Why do you ask me that?"

Jing Yi's face remained unchanged, he waved his hand and shouted coldly: "Take it away!"

As soon as the words fell, several young people around immediately came up and held Yi Chuanzong down.

"Hey! I have a bicycle!"

Of course Yi Chuanzong would not resist, so he had no choice but to follow them. Seeing that his bicycle was left behind, he hurriedly shouted.

Jing Yi turned his head and motioned, and said, "Go, bring his bicycle too."

A youth returns to push his bicycle.

Yi Chuanzong said with a strange face: "I said you can't afford to play, and you are called someone? My buddy hasn't offended you recently, why are you taking me?" He is now faintly aware that something is wrong, Jing Yi is rarely like this cold time.

Jing Yi sneered, "You've got a big deal! Go back with me and answer honestly. You'll know what happened when you get there!"

The corner of Yi Chuanzong's mouth twitched fiercely. He was sitting at home, and the pot came from the sky. He didn't know what happened.

He frowned and his eyes were full of thought, what department is this buddy in?

Now there is no Ministry of National Security, so related matters belong to national defense.

He didn't know what he had committed to let this man arrest him.

However, his only relatively secret task is to rub an egg. He has never told anyone about this, so why did he suddenly come to arrest him?

Came to a relatively secret unit.

This is a dark room.

There are rows of tables around the room, a dim electric light in the center, and a lonely chair underneath.

name...gender...age...

After some routine interrogation, a middle-aged man in his 40s asked in a deep voice, "Yi Chuanzong, tell me what you did in the past three days?"

Yi Chuanzong was helpless, "Can you tell me what I did first?"

The middle-aged man looked serious, and said in a deep voice, "No!"

"Ok."

Yi Chuanzong shrugged, pondered for a while and then slowly said, "On the first day, I stayed at home with my wife and children in the morning, and lay in bed for half a day in the afternoon. In the evening, my wife's friend came over, and then I cooked a table of dishes."

"The next day, I went to work as usual... In the evening, I invited the third master to come to my house as a guest, and then I cooked a table of dishes."

"On the third day, I went to work as usual... Then I went to He Yuzhu's house as a guest, and he cooked a table of dishes."

The corner of Jing Yi's mouth twitched, this guy lived a very comfortable life!Go to work for an hour, spend most of the day at leisure, eat and drink at night!

The eyes of other people in the room also changed slightly. In fact, before arresting him, they had collected some information about Yi Chuanzong, most of which were reported by Jing Yi.

If there is no problem with the information, then this strong man has two eighth-level fitters in his family, and he has killed several wild boars!I haven't bought loose wine every day, I always buy bottled wine!
"Tell me in detail! What is the purpose of your seeking these people! What are you talking about?" The middle-aged man looked meticulous and serious.

(End of this chapter)