When I am reborn, I just want to be a top student

"Artificial intelligence is the future technology trend, but there are actually very few research and courses on this subject in China. I believe you all know about the subject of artificial intelligence big data, so I will briefly talk to you about several algorithms of artificial intelligence."

Wang Donglai stood on the podium, confidently and calmly speaking to the students below.

Because they agreed to Yao Qizhi's request, and because artificial intelligence and big data still require the efforts of these students in Yao's class, this scene happened.

There are not many students in Yao's class, but each of them is an elite among the elites.

"Many people have heard of artificial intelligence, but when asked to describe it, they can't really say it, and can only give an example from a movie."

"In fact, artificial intelligence has been in our lives for a long time."

"For example, the spam filtering in our mailbox, which we use frequently, relies on artificial intelligence."

"Many people think that artificial intelligence is an extremely advanced technology, but this is wrong. Even the most advanced technology starts from basic principles."

"The algorithms I'm about to talk about have simple principles and were discovered and applied a long time ago. We even learned them in middle school and they are also very common in life."

When Wang Donglai said this, the students immediately became interested.

Originally they thought that Wang Donglai would teach mathematics in class. After all, Wang Donglai was most famous for his achievements in mathematics.

But they guessed wrong. Wang Dong didn't talk about mathematics, but about artificial intelligence.

Being able to enter the Yao Class, their IQ naturally needs no further explanation.

These students are naturally also very clear about the future of artificial intelligence.

In addition, they are also aware of the news that Galaxy Technology has provided money and Wudaokou has provided personnel to form a research team, so they attach even more importance to artificial intelligence technology.

Wang Donglai felt a little emotional as he watched the students below looking at him intently, waiting for his talk.

Anshui County has not had a single student from Peking University or Tsinghua University in decades, but there are thousands of them here.

Any one of them would be a rare academic master in Anshui County or even Shangluo City.

After sighing inwardly, he began to tell the story without changing his expression.

"The first one is Linear Regression, which is probably the most popular machine learning algorithm. Linear regression is to find a straight line and make this line fit the data points in the scatter plot as much as possible, trying to represent the independent variable x value and the numerical result y value by fitting the straight line equation to the data, and then use this line to predict future values."

"The most common technique used in this algorithm is the method of least squares, which calculates the best fit line so that the vertical distance to each data point on the line is minimized. The total distance is the sum of the squares of the vertical distances of all the data points. The idea is to fit the model by minimizing this squared error or distance."

“The difficulty is not in getting a prediction value, but in how to make it more accurate!”

"The second type, logistic regression, is similar to linear regression, but the result of logistic regression can only have two values. If linear regression is predicting an open value, then logistic regression is more like a yes or no question."

At this point, Wang Donglai added: "Logistic regression is actually most suitable for e-commerce platforms such as Hangzhou Mahe and JD.com, or food delivery platforms such as Ele.me, which just received $3.5 million in Series E financing this year. It can be used to predict users' purchasing preferences for categories. If you are interested in joining these companies after graduation, you can pay more attention to this aspect."

Wang Donglai spoke calmly, and he seemed to be nonchalant when talking about the importance of logical regression to e-commerce platforms and food delivery platforms.

Even the many students below could hear from Wang Donglai's tone that he didn't care about, or even disliked, the e-commerce and food delivery platforms.

Without having time to think about it, Wang Donglai started talking again.

"The third type is the decision tree. If linear and logistic regression both complete the task in one round, then the decision tree is a multi-step action. It is also used in regression and classification tasks, but the scenarios are more complex and specific."

"For example, if I were to face your class, how could I tell which students were good students? If I were to rely solely on the college entrance examination scores, or give you a set of examination papers to complete, and only consider the scores, that would be too crude."

"Then, I can discuss homework, attitude, attendance, and questioning separately. Each forked circle is called a node. At each node, questions about the data are asked based on the available features. The left and right branches represent possible answers. The final node corresponds to a predicted value. The importance of each feature is determined through a top-down method. The higher the node, the higher its attribute. For example, if I think diligence is more important than grades, the node for diligence will be high."

"The fourth type, Naive Bayes, is based on Bayes' theorem, that is, between two conditional relationships, it measures the probability of each class and the x value of the conditional probability of each class."

"To explain Bayes' theorem in non-terminology, it is to use the probability of B occurring under condition A to derive the probability of A occurring under condition B. Of course, some other data should be introduced in this process to ensure that the conclusion is correct."

"The fifth type is Artificial Neural Networks. Its essence is a set of interconnected layers consisting of weighted edges and nodes, called neurons. Multiple hidden layers can be inserted between the input layer and the output layer. Artificial neural networks use two hidden layers and need to deal with deep learning."

“The working principle of artificial neural networks is similar to the structure of the brain. A group of neurons are assigned a random weight to determine how the neuron processes input data. The relationship between input and output is learned by training the neural network on the input data.”

“During the training phase, the system has access to the correct answers, and if the network doesn’t recognize the input accurately, the system adjusts the weights so that, with enough training, it consistently recognizes the correct pattern.”

"One of the more interesting applications of neural networks is image recognition. If you are interested, you can spend more time on it. When you find a job in the future, the salary will not be low."

When he said this, Wang Dong took a look at the clock hanging in the classroom.

"Okay, the get out of class is almost over. There are still some algorithms that we haven't covered, such as dimensionality reduction, random forest, K-means, K-peak algorithm, and support vector machine. You can look for information in advance and learn them by yourself after you go down."

"I won't give you any homework. Just learn these algorithms that haven't been taught yet. I'll listen to your ideas in the next class."

"Okay, get out of class is over!"

As soon as Wang Donglai finished speaking, the bell for the end of get out of class rang.

Without any hesitation, he walked out of the classroom.

"Hiss, is this the true strength of the King God? This is only in the field of computers. If it were in the field of mathematics, I'm afraid it would be even more amazing."

"I was fascinated by the class. I wonder if you have the same feeling?"

"I had the same feeling, as if what Professor Wang said was directly instilled into my brain. Although there were many things I didn't quite understand, I somehow understood them after Professor Wang's explanation."

"Professor Wang is only 21 years old this year. He is actually our age. The gap is really too big!"

"Ah, I don't know what's wrong with Professor Wang's brain. I really envy him!"

After Wang Donglai left, the students in Yao's class started discussing.

In fact, what they didn't know was that during the class, Wang Donglai activated the skill of [Teaching and Imparting Knowledge]. Otherwise, although these students in the Yao class were carefully selected geniuses, they might not be able to keep up with Wang Donglai's teaching pace and understand it.

Wang Donglai did this for his own sake. The higher the ability level of these students in the Yao Class, the more perfect and excellent the general artificial intelligence model produced by Wudaokou will be.

……

After leaving the classroom, Wang Donglai did not go to the library or return to his room, but went straight to the Space Administration.

Two days ago, Yang Anchao, chief designer of Chang'e 5, called Wang Donglai and invited him to the space agency.

Wang Donglai naturally would not refuse the invitation from Academician Yang Anchao.

He already had some ideas about aerospace, so he would not miss this opportunity. Today was the time they had agreed to meet.

Soon, Wang Donglai arrived at the Space Administration.

Because he had an appointment, Wang Donglai entered the Space Administration after registering.

It didn't take long before Academician Yang Anchao walked towards Wang Donglai with a smile on his face.

And the person following behind Yang Anchao was Yang Shuai.

As soon as they met, Academician Yang Anchao said cheerfully: "Professor Wang, I finally meet you, a busy man. It's not easy to meet you."

If an ordinary person heard an academician say this, they would probably have started to have wild thoughts and thought that he was expressing dissatisfaction.

But Wang Donglai acted very calm, and said with a smile: "Academician Yang, you are joking. You are the pillar of the country. The achievements in the aerospace industry have attracted national attention. I am far from being one of them. I am just busy doing nothing."

"If you're busy doing nothing, then most people are probably just wasting their time and not learning anything."

"Okay, I'll show you around first. I asked you to come here this time because I have something good to tell you."

Yang Anchao took the initiative to walk in front and took Wang Donglai on a tour.

In fact, there is nothing worth visiting in the Space Agency in Beijing. If you really want to visit, it would be most appropriate to go to the launch center.

So, Wang Donglai quickly went to his office with Yang Anchao.

"Professor Wang, the last Chang'e 5 test vehicle flight mission was successfully completed. Your research and development of laser radar played a big role."

"It's just that because this is a confidential project, there are some things that cannot be disclosed at all, so your contribution has not been made public."

"But don't worry, the organization will not forget your contribution, and you will get the honor you deserve."

As he spoke, Yang Anchao took out a document from the cabinet in his office and handed it to Wang Donglai.

"Yes, this is the commendation document from above. Once the technology is fully mastered, it should be announced by the end of the year at the latest."

"You also know that all countries attach great importance to aerospace, and the technology in this area is kept extremely confidential. It will not be made public until other countries catch up."

"This is just a commendation document. Are you curious why there is only verbal commendation but no actual reward?"

"Don't shy away from this. This is the bad thing about our country. We should reward people for their contributions. As technicians, we should not think that this mentality is shameful."

"You must be familiar with the story of Zigong redeeming the cow. Some of the propaganda on the Internet has gone too far, saying that scientists who have made great contributions to the country have not received corresponding treatment, and that scientific researchers are treated harshly. This is all bullshit."

"The funding for the Young Elite Scientists Program you applied for is actually the reason for your award for the laser radar."

After Yang Anchao finished saying this, Wang Donglai finally understood it completely.

Looking back, it was a bit strange that Director Kang Chao of the National Natural Science Foundation of China showed him goodwill.

Now, combined with what Yang Anchao said, it becomes clear.

"Academician Yang, you have kept it a secret from me. I have always been a little confused about the research funding, but I didn't expect this to be the reason."

"But isn't this reward a bit too great?"

“Isn’t 50 million research funds a bit too much?”

Wang Donglai asked curiously.

When Yang Anchao heard Wang Donglai's question, he burst out laughing and said, "Well, don't worry. I don't know whether you are full of confidence or young people don't know the immensity of the world."

"You dare to propose and report such a large project on the localization of the semiconductor industry."

"To be honest, if your performance in the past two years had not been so outstanding, I'm afraid the project you applied for would have been rejected long ago. Even so, it was only passed reluctantly."

Wang Donglai smiled and explained in a serious tone, "Semiconductors are too important for modern technology, and our technological accumulation and development in this area are far behind the international advanced level. This is a huge hidden danger. Once foreign sanctions and blockades us, it will greatly hinder our technological development."

"The localization of semiconductors is beneficial to China. As for its difficulty, we cannot ignore it just because it is too difficult. Back then, my country's aerospace technology was far inferior to that of foreign countries, but we have caught up and become a powerful country, haven't we?"

Yang Anchao's eyes flashed with joy, and he said with a smile: "I guessed you would say that, so the 50 million research funds are due to your contribution and because you chose the topic of semiconductor localization. It is a combination of multiple reasons."

"What you can think of, the higher-ups will naturally think of as well. They just didn't expect that a young man like you would step up and take on this important responsibility."

"Okay, this matter is over. Don't think too much about it, and don't feel any pressure. Just calm down and do your research normally."

"As long as your research makes progress, the organization will increase its support for you, and there will be no shortage of research funding and corresponding support."

Hearing what Yang Anchao said, Wang Donglai nodded to indicate that he understood.

At this moment, Yang Anchao suddenly sighed.

"Alas, I originally thought that you were interested in aerospace, so I took this opportunity to invite you to join the aerospace industry, but I didn't expect that you applied for a semiconductor project. I heard that you are also working with Yao Qizhi on an artificial intelligence model at Wudaokou. I guess you have even less time now."

His words were full of regret, and he obviously felt sorry that Wang Donglai could not join the aerospace team.

Wang Donglai's eyes moved, and he smiled at Yang Anchao and said, "Academician Yang, I am actually very interested in aerospace, and I want to be an astronaut and fly into space to see the world. It would be even better if I could go to the moon."

"The AI ​​big model is led by Academician Yao, and I have a clue about the localization of semiconductors. I can still find time. Academician Yang, why don't you give me a chance?"

Hearing what Wang Donglai said, Yang Anchao's face suddenly showed obvious joy, and his expression became lost in thought.

To be honest, Yang Anchao admires Wang Donglai's research ability very much.

And Wang Donglai also proved his research ability.

At the same time, mathematics is an extremely important part of aerospace work.

It would definitely be a good thing if a math genius like Wang Donglai could join us.

Thinking of this, Yang Anchao was inclined to agree.

However, Yang Anchao took Wang Donglai's idea seriously and decisively rejected it.

"You want to be an astronaut, but it's probably impossible!" (End of this chapter)