Yi Chuanzong took the previous document and looked at it.
At first glance, he felt a little proud. It was indeed him. No matter how he measured it, the error was only five microns.
But when he saw the back, Yi Chuanzong's expression suddenly froze.
There is a monotonous page at the back of the document, with a big red star in the middle!
Yi Chuanzong raised his head with blank eyes, "Is this?"
"Don't you want to take a look?" Director Yang smiled teasingly, and then said, "Look, you have a mission."
Needless to say, I know it!
Yi Chuanzong rolled his eyes in his heart. A big red star appeared in his document. This matter was not simple at first sight.
This is the mission!
Yi Chuanzong frowned and opened the file, revealing his skills, and then came to the task. It was normal. He would definitely not refuse such an abnormal production task.
After some reading, Yi Chuanzong raised his head and said seriously: "Redefine weight?"
Nowadays, the big K is the International Prototype of the Kilogram (IPK), which is a platinum-alloy cylinder. It is sealed in three nested glass bell jars and stored at the International Bureau of Weights and Measures in Sèvres, France.
In a vault within (BIPM). Also called a weight.
Director Yang nodded seriously, "Yes, this is a task assigned by the superiors. There are no strict requirements for this matter. You just need to do your best."
"Although it is not stated clearly 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 did not speak, but continued to look at his task with a frown.
In this regard, he had some understanding in his previous life.
Weight is not easy to determine, and even though the Big K is stored in a highly controlled environment, its weight will 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 we have to redefine it! You can imagine the difficulties.
In 1962, Brian Josephson proposed the Josephson effect related to voltage measurement.
There are also some requirements before this new definition can be accepted. At least three experiments must produce measurements with a relative standard uncertainty of no more than 50 parts per billion, and at least one of them must have a measurement uncertainty of no more than 2 parts per billion.
10. All these values must be consistent within a 95% statistical confidence level.
NIST's final submission for the measurement of h, which redefines the SI unit, had an uncertainty of 13 parts per billion. Another measurement, from the National Research Council of Canada (NRC)'s Kibble scale, had an uncertainty of only 13 parts per billion.
It was 9.1 parts per billion. Two other Kieble scale measurements, including those from the French National Laboratory of Metrology (LNE), also met the required accuracy.
In addition to the Kibble scale, another way to calculate Planck's constant was proposed in that paper - to define the kilogram in terms of the mass of silicon atoms, by calculating 1 kilogram of ultrapure silicon-28 (the most abundant form of silicon).
of isotopes, containing a total of 28 protons and neutrons) 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!
Zoom in from a palm-sized silicon ball to 12756k to install the latest version.】
"Impossible?" Director Yang looked worried, "That means it can't be completed?"
"I can't say that. You can try what I say, but this matter is not as simple as you think. It is not just a matter of accuracy. What is more important is the weight!" Yi Chuanzong said with a sigh.
"What do you mean?" Director Yang's eyes lit up and he asked, "You mean there are other conditions?"
Yi Chuanzong nodded slightly and said seriously: "0.01 micron, I can challenge this accuracy, and it is possible to complete it with luck. But 10^-8...the diameter of an atom is only
But an object with a diameter of 10^-10 naturally corresponds to micrograms!"
He smiled bitterly and said, "The weight of a particle of dust is at the microgram level. If I spit it out in one breath, the weight will be affected. Any amount of exhaust gas from our factory's chimney is exceeding the standard. In this case, it is impossible for me to complete this task."
task."
Director Yang looked startled, and then leaned back on his seat. He muttered, "What you said makes sense. Even the standard of doing things under this kind of interference may not be up to standard."
Silence fell in the office.
Neither of them spoke. Director Yang was still thinking about how to proceed. This was not an easy task from the beginning.
Yi Chuanzong said nothing. He was very confident in his skills. Other fitters could control the error to a few microns, which was already the limit. The closer the accuracy was to 1 micron, the more luck was needed.
He is different. He can control the accuracy of 1 micron at will. At full strength, it may be only 0.1 micron, or 0.05 micron, etc.
However, he also needs luck and touch. It is uncertain when it will be completed, but at least there is a good chance that it can be completed.
If it doesn't work once, just do it twice, and if it doesn't work twice, do it ten times. He produces faster, so he doesn't worry about trial and error.
"How sure are you?" Factory Manager Yang asked, "You always keep things under wraps. This mission is very important. You and I will go over it. If you are sure, I will continue to apply for you."
Yi Chuanzong frowned and said: "If there are no problems with the raw materials and the production environment, there is an 80% probability that I can complete it within a year, and a 50% probability that I can complete it within half a year. If the time is halved, I
The success rate will also be reduced. This is a matter of probability and luck!"
Director Yang lit a cigarette and became quiet again, lost in thought.
Yi Chuanzong didn't bother him. Whether he accepted the task or not didn't make much difference to him, or even to others. The current technology hadn't developed to that point yet, so he didn't care much subjectively.
After about ten minutes, Director Yang spoke, "I will report this matter to the superiors. You can wait for notification during this time. Take your certificate and go."
"Okay, Uncle Yang."
Yi Chuanzong nodded and picked up the "Engineer Certificate" with a steel seal next to it and left.
It took more than an hour to complete today's production tasks.
On the way home, Yi Chuanzong looked deep in thought. Many people greeted him, but he also looked absentminded.
After returning home, Yi Chuanzong sat at the table and drank tea silently, with his two cubs barking.
"came back?"
Lou Xiao'e was teasing the two cubs. She turned her head and glanced at him and said hello, then raised her hand again to pinch her son's little face.
But she didn't get a response for a long time. Her hand suddenly stopped in mid-air, and she turned her head to look at Yi Chuanzong seriously. It was rare to see her man look thoughtful.
"Is there anything else that can trouble you? What happened?"
"Hey!" Lou Xiao'e scolded, "What are you thinking about?"
Yi Chuanzong came back to his senses and said casually: "Well, I'm back. I have a task today, which is quite difficult."
"Mission? What mission?" Lou Xiao'e asked curiously, leaving her two sons who wanted to stand up and walked over, sitting next to Yi Chuanzong.
"How do you say it?" Yi Chuanzong touched his chin and said in deep thought, "After you weighed yourself, you weighed 118 kilograms, 3 taels and 9 cents. If sold as pork, it might cost 77 yuan, 6 cents and 3 cents. But in fact, this weight may not be
It’s not that accurate, even if it’s converted into money, it can only be divided accurately.”
Lou Xiao'e clenched her fists and gritted her teeth. Not only did this bastard think she was fat, he also dared to call her a pig!
"It's okay to simply buy meat and weigh it on a scale, but if it's used in scientific research projects, then this accuracy is not enough. My task this time is to redefine the weight. Although it has not been decided yet, I feel that it is very important.
There is a probability that I will accept this mission. It will be very troublesome later. I am thinking about how to complete it!" Yi Chuanzong said seriously.
Lou Xiao'e looked at him suspiciously for a long time, then suddenly punched him, "Don't even think about lying to me! Is this why you scolded me?"
"I really have a mission!" Yi Chuanzong said seriously.
"I have a mission but I haven't come down yet! Let's watch!" Lou Xiao'e pounced on him.
Yi Chuanzong raised his eyebrows slightly. This tiger girl obviously needed to be dealt with. Without saying a word, he pressed Lou Xiao'e on the bed with one hand, got up and walked outside, "I'll open the door."
The corners of Lou Xiao'e's mouth raised slightly, she turned over and looked at the two cubs. She said gently: "Baby, it's time for you to sleep."
…
Three days later.
Yi Chuanzong finished his work and slowly got off work.
"Why is Li Hao's grandson so happy recently? Even though I passed the engineer assessment, his work station has not changed. He should be looking for trouble with me."
"That's weird, that's weird!"
Yi Chuanzong's eyes were full of thoughts. He found that Director Li's movements began to become smaller. It was obvious that he was becoming more and more skilled in secret operations, or he had found the right way. Everything became stable and naturally there would be no more problems.
Sound of wind.
"Yi Chuanzong!"
A cold shout came from the gate. Suddenly, Yi Chuanzong was shocked. It was not that he had done anything wrong, but mainly because he was familiar with the voice.
Look up.
Yi Chuanzong rolled his eyes, and a group of young men in youth uniforms walked into the factory. The young man in the lead had a cold face, a frown on his face, and worry hidden in his eyes.
"I said, brother, what's wrong? You came to me so early in the morning, and you brought so many friends with you." Yi Chuanzong was very surprised, and looked at the people around him calmly. Except for Zong Lie, he was not alone.
He didn't know them, but the faces of these people were so serious that he almost thought he had committed something.
"Where have you been walking these past three days?" Jing Yi said seriously, with a tone of interrogation.
Yi Chuanzong looked confused, "What can I do? Go to work, eat, take care of my mother-in-law, take care of my children. Why do you ask?"
Jing Yi's expression remained unchanged, he waved his hand and shouted coldly: "Take it away!"
As soon as he finished speaking, several young men around him immediately came up and held Yi Chuanzong down.
"Hey! My bicycle!"
Of course Yi Chuanzong would not resist, so he had no choice but to follow them. Seeing that his bicycle was lagging behind, he quickly shouted.
Jing Yi turned around and gestured, "Go and bring his bicycle."
A young man returned to push his bicycle.
Yi Chuanzong looked strange and said: "I said you can't afford it, so you call someone? I haven't offended you recently, so why don't you go with me?" He now faintly sensed that something was wrong. Jing Yi is a rare guy.
When it's so cold.
Jing Yi shouted coldly, "You are in big trouble! Come back with me and answer honestly. You will know what happened when we get there!"
The corner of Yi Chuanzong's mouth twitched hard. He was sitting at home and a pot came from the sky. He didn't know what happened.
He frowned and his eyes were full of thoughts, which department is this guy in?
There is no Ministry of National Security now, so all related matters belong to national defense.
He didn't know what he had done to warrant this man's arrest.
However, his only relatively secret mission was to rub an egg. He had never told anyone about this, so why did he suddenly come to arrest him?
Came to a more secretive unit.
This is a dark room.
There are rows of tables around the room, with a dim electric lamp in the center and a lone chair underneath.
Name...Gender...Age...
After a routine interrogation, a middle-aged man in his forties asked in a deep voice: "Yi Chuanzong, tell me what you did during the past three days?"
Yi Chuanzong looked helpless, "Can you first tell me what I committed?"
The middle-aged man looked solemn and said in a deep voice, "No!"
"All right."
Yi Chuanzong shrugged
Shoulder, he pondered for a moment and then slowly spoke, "On the first day, I stayed with my wife and children at home in the morning, lay down for a long time in the afternoon, and my wife's friends came over in the evening, and then I cooked a table of dishes."
"The next day, I went to work as usual...I invited the third uncle to my house as a guest in the evening, 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's life was too comfortable! He went to work for an hour, had leisure for most of the day, and could eat and drink in the evening!
The eyes of other people in the room also changed slightly. In fact, they had collected some information about Yi Chuanzong before arresting him, most of which was reported by Jing Yi.
If there is no problem with the information, then this strong man has two eighth-level fitters at home, and he has killed several wild boars! He has not bought any bulk wine every day, he only buys bottled wine!
"Tell me more about it! What is your purpose in finding these people? What are you all talking about?" The middle-aged man looked meticulous and serious. This chapter has been completed!