Huayu for engineering students

Chapter 54 Thesis and Laboratory (for follow-up, recommended)
Wang Fei is having a great time recently.

During the day, Wang Xu would go to school, and Wang Fei was free to move around. From time to time, he went to Lao Na's house to harass her, or went back to Wang Xu's house to play mahjong with Aunt Jiang and the others.

Mahjong has become very popular in the imperial capital of this year, but the style of play is very simple, without the complicated rules of Xiangjiang Mahjong.

Most of them are to knock down the ass, double the self-touch, all of them, seven small pairs, also double, shoot the cannon individually, and give everyone the self-touch, simple and quick, just a few minutes.

I don't have much money, so I just play a dime, or even a five-cent one.Since Wang Fei was called to be a matchmaker because of Aunt Jiang's three lacks, she quickly got used to it, and then she became addicted to mahjong and couldn't help herself.

If it weren't for seeing her know how to practice kung fu every day, and the songs he gave her were also practiced very well, Wang Xu would have wanted to enroll her in a class to quit addiction.Since there is no delay in business, just play if you like, and you are not a child.

But every night, Wang Fei would go back to the small courtyard on time, take the meals cooked by Aunt Jiang, and live a two-person world with Wang Xu, which made Wang Xu very satisfied.

Wang Xu didn't know that many people were thinking about him, and he didn't know that more and more people began to pay attention to him. He didn't care if he knew it, because he was very busy now.

He is currently busy repairing his recording equipment. He has not done it before, mainly due to the lack of necessary equipment. If he does not go back to school, he can borrow the school's laboratory equipment.

Equipment such as electric welding and multimeters are easy to solve, after all, you can buy them if you have money.But professional laboratory equipment like oscilloscopes, signal generators, and spectrum analyzers, even if you have money, you can't buy them now.

Because imported ones have to wait, and domestic ones have to wait even more.

For imports, you have to wait for foreign exchange quotas, ordering, manufacturing, shipping, customs clearance, etc. It can take two to three months or even half a year.

As for domestic products, the electronic instrument factory has not been reformed yet, and the output is limited. You are not a state-owned enterprise or a university, so just wait. When it is your turn, it depends on your mood.

Fortunately, Mizuki University's laboratory can be rented, as long as you are an insider.For students, graduate students need to apply with their supervisors, and college students need to apply with their departments, which is not too much trouble.

The school has just started these two days, and there are few people doing experiments, so I have to borrow it quickly. After a few days, there are too many people and it will not work.

After going through a lot of twists and turns, Wang Xu finally got the right to use an electrical laboratory for a week. Although he needs to pay 2000 yuan in rent, it is still very cost-effective, and the school will assign an experimental teacher to help keep an eye on it.

Among the undergraduates, he is the only scorpion shit.

And this privilege was exchanged by him with a paper, which was an artificial intelligence algorithm about convolutional neural networks.The previous life was published in 1998, and there was no splash in the early stage.

It wasn't until 2010 that the convolutional neural network really became popular, and it was gradually excavated and became a generation of myths.Of course, this is also deeply related to the original author's 20 years of deep cultivation in this field. Many of his later papers are based on this one.

I won't talk about the specific content, it has nothing to do with entertainment, just copying lyrics is fine, copying papers, it may really be beaten to death by readers.

This is one of the few papers that must be read by those who studied artificial intelligence in the previous life. It is not difficult, but the design is exquisite. It is very suitable for Wang Xu, who only has an undergraduate degree. There is no problem in publishing a second district SCI.

The original work is in the first district, but he is Dr. Chou Guo, the head of a famous laboratory.As for Wang Xu and Xiao Xiami, if he can publish in the second district, he has to find a tutor in the department to name him as the corresponding author.

But even so, Mizuki in 1991 was a big deal.You know, this is the era when a doctor can graduate with only one SCI, and you know the weight of such a thesis in the hearts of teachers in the department.

(People such as teachers and classmates have nothing to do with reality. After all, they are not celebrities, and no one knows them if they use them, and they are easy to cause trouble.)
Today's universities are not as packed as later generations, so suddenly an undergraduate came to say that he wrote an algorithm paper. This student was only a sophomore, and his professional courses hadn't even started yet.

The teachers were very surprised, but they still contacted Wang Xu, a returnee doctor named Luo Congwen, as a tutor, and asked Wang Xu to show him the paper.

Well, that's right, Mizuki's undergraduates can also have tutors.When there is a special need, you can assign a tutor, which is also good for the tutor, and it is considered a workload, especially for those young teachers who have not yet started accepting graduate students.

The supervisor is very responsible. After reading the paper, he felt that it was very novel. It is a branch of artificial intelligence. It is forward-looking and very good paper, so he changed the format for him and submitted it.

He even entrusted the help of his mentor in Ugly Country to see if he could speed up the process.This is the first time he has published an article as a corresponding author, and he also wants to get off to a good start. If it goes well, it will be good for applying for graduate students and being promoted to associate professors next year.

As for the laboratory, well, it doesn't matter if it has anything to do with the thesis.

It was because of that thesis that Wang Xu had successfully become a celebrity in the department, and it was not a problem to rent a laboratory, especially a laboratory that had no assignment yet.

It doesn't matter because the purpose of renting the laboratory can be said to have nothing to do with the thesis. When you write an artificial intelligence thesis, you use the electrical laboratory as a hammer.

Wang Xu's progress is very fast, this time it's just maintenance, and by the way, adjust the signal-to-noise ratio.

The recording equipment can be regarded as a whole system, the sound goes in and the finished product comes out.Therefore, system engineering is a very critical technology when tuning studio equipment.

Friends who play Hi-Fi may have some experience. They obviously use good things, but the final effect is always unsatisfactory, not even as good as some brothers who can play with one-tenth of the budget.

This is the problem of system tuning, which is why Wang Xu needs advanced testing equipment such as oscilloscopes.

To put it simply, use a standard wave generator to generate a standard waveform, and then look at the final waveform after passing through the entire system. The overall deformation is all the errors of your system.

Every device on the way will cause some waveform changes, but if these changes cancel each other out, a complementary result may be formed. In the end, the two intermediate results are wrong, but the final result is correct.

Of course the music won't be as precise as a standard wave, but the compensatory mechanism is similar.Wang Xu is going to use these professional equipment, plus his mechanical ears, to repair this pile of equipment, and then adjust it to the best condition.

As for the signal-to-noise ratio, it is more troublesome. Wang Xu can design some special circuits to filter the clutter, but this kind of filtering will inevitably affect some normal waves, so recording equipment and audio equipment The design and manufacture are often really metaphysical.

Therefore, it took Wang Xu two full days to design several sets of filtering and amplifying devices for different locations, and then connect them to the equipment respectively. Only then did he get a result that basically satisfied him.

This is considered to be usable. Although it cannot be compared with the top recording studios in the industry, it can already be regarded as the top in China.But in Wang Xu's eyes and ears, this set of things is just usable, because he knows better.

(End of this chapter)