Chapter 70

Life is like this, as people wish, has been difficult so far, it's not bad to live a simple and popular life, who can guarantee a lifetime of foresight? At the crossroads of life, in addition to the postgraduate entrance examination, there are many choices, and not everyone is suitable for scientific research. Teachers, doctors, nurses, maintenance workers and so on, every profession in the spaceship must have one.

The atmosphere at the dinner table is getting better and better. There are many things that you want to have.

At present, the whole society is still dominated by young people, the class has not been solidified, and the whole social structure does not need to consider too many "money" issues, so the pressure is not so great.

"Using knowledge to realize class transition is actually the most healthy way of human civilization. Even if you don't get into graduate school, you can be like me. As long as you work hard, there are many ways to realize your value. " Finally, brother Wang Xin made another speech on life.

After dinner with friends, Zhang Yuan went back to his bedroom and began to learn new knowledge.

There's so much to learn about space mechanics.

A spaceship, whether large or small, almost involves more than ten disciplines, such as physics, biology, materials, chemistry, etc.

He teaches himself for a long time every day.

In particular, the next to participate in a more difficult interview, even if it is just a temporary cramming shock learning, is also good.

“…… Let's start with integrated circuits. "

Zhang Yuan opened his book ASIC design, a classic book, which mainly covers the basic process of Digital IC and ASIC design, plus the main design methods, with a total of 8 chapters.

When he was in University, he had received relevant knowledge, but not in-depth.

Actually It's not too hard.

The essence of silicon-based chip is very simple to understand: on the same semiconductor substrate, PN junction has single conductivity, and connecting the two ends of PN junction with wires is diode. With diodes, it's easy to design "and gate circuit" and "not gate circuit", and then it can be used for logic calculation.

The Soviets once worked out the ternary circuit, which is slightly different from the binary circuit. There are two more resistors in the "and gate circuit" and "not gate circuit". But this is different. For the manufacturing industry, it is more troublesome, the cost is high, and the yield of chips is much lower. Because of various shortcomings, they are gradually eliminated.

It sounds that the principle of such a simple thing, almost killed 99.9% of human beings!

Zhang Yuan thinks that without the help of a computer, even if he spends a month designing circuits, his computing power is no better than that of a six-year-old

To put it bluntly, the more you study, the more you can understand the greatness of nature.

Chip science, a discipline that has been developed for hundreds of years, from ancient diodes and integrated circuits to the latest photonic chips, its basic "band theory" is just an approximate theory. People clearly know that it is not completely correct, but they can't correct it.

Because there's no way to accurately calculate the behavior of electrons.

In fact, most of them are just playing electronics.

As long as you are proficient in the various properties of electronics, the rest of the subjects can be learned by analogy.

After reading for six hours, he stopped and took a breath.

The fast-moving brain is a little feverish, and it takes time to absorb the new learning content.

"Change your mind and have a rest."

It took half an hour to go out for dinner.

He re opened the computer and found that there was a lot of unprocessed information in the mailbox, one by one clicking and replying.

The earth's work project is a good exercise opportunity, or to continue to do. He is mainly engaged in the work of algorithm framework, and the progress is a little faster than the team on earth. Four or five hours a day is enough.

Therefore, more than ten hours of study every day is absolutely not boasting.

The above day is almost a very regular one for Zhang Yuan. Sometimes he feels very tired, but it is more about the sense of fullness brought by knowledge. Don't play games, don't watch soap operas, don't fall in love, just make yourself strong.

Zhang Yuan sighed: "if Li Zhendong works so long every day, even if he's not as good as me, he's half as good as me..."

But he deeply knows that what he is looking at is just a little superficial. There are definitely more people in the world than him.

Xueba in the world is divided into five levels.

The first level is that on the way of a long journey, I heard a strange aunt boasting about her children's success. She was admitted to the key junior high school and senior high school in the city. She was the first in the class and the second in the class.

This should be the lowest level of Xueba.

It's just high school. I don't know what I'm bragging about

The second level is that after going to the same key university, some people also take classes and study by themselves. After a semester, they get a high score inexplicably.After a long time, I gradually find that no matter how hard I try, I can't surpass these people. With the same study time, they are always more efficient than ordinary people.

Such a bull is often referred to as a "real bully".

The third level, of course, is the legendary "learning God".

Different from Xueba, Xueshen can get high marks if he doesn't study much.

They are the most dangerous people in the University. Many weak chickens who don't know themselves follow them. They also play online all night, but they hang up several classes.

Suddenly looking back, the same playful guy also took part in some competitions and won some Scholarships

Weak chicken failed to pass the exam, but "Xueshen" went abroad.

The fourth level, which has begun to march towards non-human beings, is called the real "God".

In terms of personal morality, "God" has no flaws.

They are both gods and tyrants. The most powerful part of these "gods" is their physical strength and persistence. Learning is a very happy thing for them, just like chewing xuanmai, they can't stop at all.

When ordinary people face "God", they will only be dwarfed, feel ashamed, and can't raise any trace of jealousy.

Naturally, the study of God can not be compared with the real "God". Because the ability to learn God is limited to the knowledge in textbooks, and the real "God" has long been out of the scope of school.

Zhang Yuan is confident that he is marching in this direction

There is even a fifth level, of course, "God on God"!

It can only be seen in the greatest genius in the world.

For example, the intended tutor, academician Ding, is a mathematics department of P University, with 20 100 points and 6 99 points!

But he never brags about the trivial matter of full marks in examinations. For these "gods of God", examinations, competitions and scholarships are as childish as kindergarten games.

Ding Zhaodong was a freshman in University. In one year, he learned all the contents of his four years in University. By the way, he was a bit bored, and he also learned the courses of the physics department next door

However, these are not important, only to explore the infinite nature, is the "God of God" in the joy of life.

Stronger than Ding Zhaodong, yes!

For example Professor Wang Zhong!

Professor Wang became famous when he was young. At the age of 22, he had his masterpiece homology function in nuclear space.

Zhang Yuan has no way to understand this paper on algebraic geometry.

In Professor Wang's words, the most talented brain in the world should study mathematics. For those engineering professors who have no emotional appeal and aesthetic ability, he disdains to talk with them at all

Even these people study day after day, year after year, and their accumulation has increased linearly over the past few decades. The gap between people is actually bigger than that between people and dogs.

In this way, what qualification does he have to complain endlessly?

……

(push a Book of elves to log in ahead of time. You can read it if you like the second dimension.)