Chapter 433

Chapter 436

Department of mathematics and Department of physics.

The two are the foundation of all disciplines, and the other is the leading discipline of natural science, both of which have a detached status.

Perhaps many people think that these two subjects have always been in the contradictory relationship between me and you.

But in fact, since the establishment of the two disciplines, they have been in a friendly cooperative relationship.

On second thought, it is. Both mathematical research and physical research are like walking on a lonely path, isolated from the mass society, with few participants.

You can't imagine that other people can understand Diophantine analysis and understand what condensed matter physics contains.

Therefore, for mathematicians or physicists, convenience has become one of the few people who can share a common language.

The hero cherishes the hero, which is probably the feeling.

Therefore, there is no such thing as verbal confrontation or fighting in order to compete for academic status.

The two professors' dissatisfaction with Cheng Nuo is not due to his "mathematician" status, but to question his academic level.

They really don't understand why director Aldin sent Cheng Nuo, a guy who just looked at his appearance and thought it was unreliable!

But after all, Cheng Nuo was sent by the director, and the two professors did not want to leave Cheng Nuo alone. Otherwise, the relationship with the director might be very stiff in the future.

So after hesitating for a while, the older researcher called Cheng Nuo. "Who, come here and help look at some of the data."

Cheng Nuo raised his eyelids, looked at the direction of the elder Professor, and continued to play with his mobile phone.

The old professor had no choice but to look at the young professor standing outside the vacuum room, took a pile of experimental data in his hand, and got up to come to Cheng Nuo.

"Mr. Cheng Nuo, don't make it difficult for us. Although I don't know what the director sent you to our research group. But what I need to tell you is that the project in our hands is a first-class project of the Royal Academy of Sciences. If the project is not handed over on time, the responsibility will not only fall on the two of us. "

Cheng Nuo put away his mobile phone, looked up at the elder professor's eyes, and said in a relaxed tone, "Professor Aldin asked me to come here because I heard you were in trouble and asked me to come here to help. You are not angry here. Is it true that the professors of Cambridge University judge a person's academic level only by their age? So, if you pull a beggar of 70 or 80 years old on the street, you should be called the academic leader

"You..." The old professor's beard bristled with anger.

But to be a professor is not a fool who does nothing without thinking. A few words from Cheng Nuo are not enough to make them lose their senses.

The old professor's face quickly returned to normal. He glanced at Cheng Nuo with a smile. He snorted and said, "I admit what I said is arbitrary, but what I said is common sense."

The senior professor handed Cheng Nuo a pile of A4 paper recording the experimental data. "If you can really analyze the reason why the experiment failed in one day, you can prove that you are the kind of person who breaks the common sense. At that time, we must both apologize for the arbitrariness

Cheng Nuo smiles. He took the pile of experimental data from the elder professor and laughed happily.

"One day is not necessary. One hour is enough."

Cheng Nuo's confident tone keeps the old professor's heart beating.

In order to avoid being said to be looking for foreign aid, Cheng Nuo directly sat in the laboratory and looked at a lot of experimental data.

There are a lot of data. More than 50 groups of experiments have recorded more than 100 pieces of A4 paper.

The experimental data of more than 50 groups of experiments are not the same, but the results are the same, because they are all failures.

Cheng Nuo ignored the eyes of the two professors who looked at them from time to time. His mind was completely immersed in this pile of experimental data.

…………

"Research on Preparation of nano ultrafine powder by electrokinetic technology" is the full name of the project.

In short, it is to use the theory of electrohydrodynamics to prepare nano ultrafine powder.

Nano ultrafine powder is a kind of solid particle material in intermediate state between atoms, molecules and macro objects. Can be used for: high density magnetic recording materials Optoelectronic materials, advanced battery electrode materials and many other practical fields.

The traditional method of preparing ultranano differential is not only high cost, but also has very strict requirements for environment and materials, which makes it difficult to be widely applied.

Once the electrodynamic preparation of nano ultrafine powder is successful, it only needs a simple quartz capillary and extra high voltage to prepare nano ultrafine powder. The cost is less than 10% of the original. Moreover, there are not so strict requirements for the preparation of nano ultrafine powder materials.

No wonder the difficulty coefficient of this project is not too high, but it is listed as one of the 100 first-class projects of the Royal Academy of Sciences.

Once this thing is made out, the value it can create is not too big!Having figured out this point, Cheng Nuo knew why the two professors were in such a hurry.

After more than ten minutes, Cheng Nuo looked through all the data, and then recorded all the data in his mind.

Then, Cheng closed his eyes, constructed a table in his mind, and filled in the experimental data one by one.

The purpose of the two professors is to prepare nano ultrafine powder, but after more than 50 experiments, the particle size obtained does not meet the requirements.

In each experiment, only about one tenth of the powder can guarantee the particle size below 100 nm. If only this success rate is used, there is no need to carry out research.

What Cheng Nuo needs to do now is to find the problem through derivation.

There are many independent variables in the experimental conditions of preparation of ultra nano powder, but only a few have influence on the particle size of ultra nano powder: DC high voltage voltage, DC high voltage frequency, experimental temperature, diameter and length of capillary nozzle, conveying melt pressure, resistance of melt flowing in capillary

"Do you have draft paper?" Cheng Nuo suddenly raised his head and said.

The old professor pointed to a corner of the laboratory. "There are all A4 papers. You can use them."

Looking at Cheng Nuo's back, the old professor touched his chin and thought deeply.

He paid attention to the time. It was less than half an hour since Cheng Nuo got the experimental data.

Is He's got ideas so soon?

No matter what the elder professor thought, Cheng took a few pieces of A4 paper, took out his pen from his pocket, and began to calculate the data on the paper:

[let R be the minimum average radius of ultrafine powder, o be the surface tension of liquid metal, ￡ o be the dielectric constant under vacuum, μ be the coefficient related to the field strength, G be the amount of droplets formed in unit time, and u the DC high voltage 】

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