Chapter 469: From someone (two/three)

"is it here?"
"It should be here..."
"I hope it is here!"
Xu Mang was standing in front of an office. He wanted to see a scanning tunneling microscope. Oxford University has a scanning tunneling microscope. The key is in the hands of Professor Ma Teli.
Bang bang bang,
After an invitation,
Xu Mang hurriedly pushed the door and entered, and saw a middle-aged woman standing in front of a blackboard with various calculations written on it.
"what?"
"Professor Xu?"
When Ma Terli saw Xu Mang, she was stunned for a moment, then put on a smile and asked, "Is there anything Professor Xu is looking for?"
"Hey..."
"Hello, Professor Martelli." Xu Mang said with a smile: "I am looking for you mainly to learn about scanning tunneling microscopes."
"Scanning tunneling microscope?"
"Is this related to the gaseous carbon ring you are studying?" Professor Ma Terri asked curiously.
"There is no necessary contact, just pure curiosity, wanting to understand." Xu Mang smiled and said: "I don't know if Professor Ma Terli is willing, I think this request should be very simple, not difficult..."
Ma Terri nodded and said seriously: "Professor Xu rarely speaks, how can I help you do it."
moment,
Ma Teri took Xu Mang to the laboratory.
At first I thought that I needed to walk a certain distance, but I opened the door and walked to the opposite door.
Before Xu Mang probably knew about the scanning tunneling microscope, a probe slowly passed through the material to be analyzed, a charge was placed on the probe, and an electric current flowed from the probe through the entire material to the bottom surface.
When the probe passes through a single atom, the amount of current flowing through the probe is different, and these changes are recorded.
The principle is that the electric current fluctuates when it flows through an atom, so that its outline can be probed extremely carefully. By drawing the fluctuation of the electric current, human beings get the grid structure diagram of a single atom.
Understand the truth,
But understanding and operation are two different things. It's like Xiaoman knows that he is an airport and wants to be bigger. But this is not to say that big is big. There is a process from level to big. Even if you read a lot of books, tell him Many of Mann's skills to grow bigger are a big deal when it can be operated.
Theory and practice,
Different!
"STM has two working modes, constant current mode and constant height mode. In general, constant current mode is adopted. This working method obtains comprehensive image information and high microscopic image quality."
"Of course... the constant height mode also has its own characteristics. It uses tunnel current to obtain microscopic images without the need for light sources and lenses."
Pause for a moment,
Ma Terli went on to say: "STM has several requirements. I will not talk about scanning. In addition to scanning, STM can be used to find defects and damages on various structures on the surface, and use surface deposition and etching methods. Establish or cut connections to eliminate defects and achieve the purpose of repair, that is, flaw detection and repair."
Xu Mang nodded again and again. At this time, he had already turned on the memory mode, and remembered all what Ma Terli had said in his mind, and copied the basic parameters of the manual by the way.
"Professor Mattelli?"
"Where did you buy this device?" Xu Mang asked, "It seems... it looks like it was made by yourself."
"Correct!"
"We provide the drawings, and the School of Engineering will help us build them." Ma Terri smiled: "This STM is almost one of the highest resolution in the world. It has won the Best Innovation Award and has also helped many Nobel Prize winners. experiment."
"..."
"Awesome!"
Xu Mang was immediately envious, looking at this shameless iron bump, instantly moved his mind.
copy!
Completely copy this world's most powerful microscopy tool, and then bring it back and make it yourself to avoid being blocked by others' technology in this respect.
"Ugh?"
"Is this part of shock absorption?" Xu Mang asked.
"Correct!"
"Because the working distance is less than one nanometer, and the tunnel current has an exponential relationship with the tunnel gap, any vibration will cause instability. Vibration and shock must be isolated, and vibration must be isolated!" Ma Teli said: "How to reduce vibration , I can’t tell, it’s a secret."
Xu Mang showed a slight smile and nodded to Ma Terli: "I understand."
in fact,
At this time, Xu Mang probably guessed how to reduce the shock. It is impossible to rely on the spring itself. It is estimated that the frequency of the external vibration and the natural frequency of the instrument are cut, and the two frequencies are coordinated to a value.
after all,
It's easy to do through a computer.
Immediately after,
Xu Mang asked a lot of questions, and Professor Ma Terli only talked about the general content, and some reserved Xu Mang, but in many cases, Xu Mang was able to guess a lot of questions, and very few were not at all. know.
This function parameter setting...Materi is completely confidential.
In this regard,
Xu Mang had no choice but to accept it. Although there must be a scanning tunneling microscope in China, the resolution is not as high as that. As a result, when it comes to studying atoms, it is at a disadvantage compared to foreign countries.
Back in Ma Terri's office, Xu Mang chatted with her for a while, then noticed the calculation process on the blackboard.
"Professor Ma Terli is studying... the single resonance model studies the characteristics of medium dispersion, right?" Xu Mang asked with a smile.
After hearing Xu Mang's words, Ma Terli's face changed slightly, and she nodded and said: "This is indeed the problem. Unexpectedly, Professor Xu also knows well about electromagnetics and electrodynamics!"
"Okay..."
"It seems that the calculation process is stuck, isn't it?" Xu Mang said, "It's normal to be stuck here."
"..."
Matli did not speak, she suddenly realized that there was no ordinary person sitting in front of her, he was a man who had applied mathematics to the extreme.
perhaps,
The problem I encountered was not a problem at all in the eyes of Professor Xu.
After all, the essence of the problem can be found at a glance, which is not something everyone can do.
"Professor Xu..."
"Can you help me solve it?" Professor Ma Terri became somewhat respectful.
"Yes you can!"
"This question is not difficult, at least it is not difficult for me." Xu Mang said with a smile: "But...I really want to know the parameter settings of STM. Of course, I just look at it to get a general idea."
Matli pondered for a long time, and generally refused, but the person sitting opposite was not an ordinary person, and could not be treated with ordinary circumstances.
"it is good!"
Words fall,
Ma Terli took out a notepad, handed it to Xu Mang, and said seriously: "This is the specific parameter setting."
Xu Mang smiled and said thank you.
"System... Turn on memory mode!"
【Start Memory Mode】
"System... Turn on the beast mode!"
[Activate the beast mode]
after that,
Xu Mang frantically flipped through the above parameter settings, let alone...they are really detailed.
After seeing Xu Mang's speed, Ma Terri was completely relieved, she was really just flipping through it casually. If this speed can be remembered all, then the world is too dangerous.
Less than ten minutes,
Xu Mang returned the notepad to Ma Terli and said gratefully, "Thank you..."
"No no no!"
"Professor Xu is polite." Ma Teli smiled.
"Ha ha..."
"Then as a return...I will solve the problems you encountered, and by the way, I will also send you the rest." Xu Mang said seriously, "Are there paper and pen?"
"give!"
moment,
In front of Ma Terri, Xu Mang began to solve the problems she encountered.
high speed,
Almost to the point where Professor Martelli's face was full of horror.
This...
How can this be so fast?
real or fake?
this moment,
Professor Martli began to doubt her life. She encountered such a situation for the first time. The speed was so fast that she couldn't look directly at it. Can such a speed be correct?
Are you lying to me?
Swish,
Still going on...
Xu Mang quickly solved the problem that Professor Ma Terri encountered in the calculation. In fact, this problem is not very difficult. Its difficulty lies in the splitting of a long formula, which requires a clever split into four sections. Otherwise, it won't be solved in this life.
solution...
solved?
Only a few minutes have passed!
Ma Terri saw that one of her problems seemed to have been resolved, but Xu Mang did not stop writing.
quickly,
After another ten minutes, Xu Mang silently put down the pen in his hand, picked up a dozen pieces of white paper, and said with a smile: "It's no longer possible... the man is getting old. It was not a problem for an hour before. Twenty minutes, it's so exhausting."
"it is good!"
"It's all solved." Xu Mang handed the blank paper full of the process to Professor Ma Terli, and said: "I'm leaving..."
Words fall,
Xu Mang left the office directly, leaving Ma Terri with a bewildered face.
I...
This is too...too neat, right?
Xu Mang’s operation made Professor Martli completely confused. She began to doubt the world and whether the aliens existed. After thinking about this problem for a day, others solved it within a few minutes. One piece to solve.
By the way,
Is it right?
This is where Mattelli cares.
Subsequently,
Professor Ma Terli sat in the office and began to read Xu Mang's process. He felt a trace of fear when he watched it. It turned out... the solution to the problem he encountered was so simple? !
but...
Ma Terli knows how much effort is behind the seemingly simple, and only people like Professor Xu will find it simple.
five minutes later,
Ma Terri intends to share this process with her two colleagues and experience the top strength in the industry together.
...
"Materi?"
"Aren't you solving the problem of the characteristics of the medium dispersion?" Dean asked curiously when seeing Mattley coming, "Why did you suddenly come to me?"
"I..."
Professor Mattley glanced at Dean and Bill, and said seriously: "My problem has been solved..."
"???"
"???"
solution...
solved?
Dean and Bill knew what kind of problem Matterie encountered. It was a mathematical calculation problem, and Matterley's mathematical ability was not outstanding, unless it was a professor in the Department of Mathematics, but... . She seems to be out of touch with the people in the mathematics department.
Immediately after ~EbookFREE.me~ Martelli took out ten pieces of white paper, handed it to Dean, and said, "Bill, you come and take a look too!"
In just a few minutes,
Dean and Bill looked at Mattley in horror.
"Materi?"
"You... have you compromised with the math department?"
at this time,
Professor Ma Terli smiled and said firmly: "No...the above calculation process comes from a certain theoretical physics professor!"
......
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