Deep Space Fleet

This day, a big event happened suddenly in the spaceship: Academician Ding of the Wild Wolf Design Bureau made a sound and wanted to recruit a graduate student among undergraduate graduates, which caused a sensation among the entire group of candidates!

Academician Pu Ding has always trained doctors, but this time he wanted to recruit masters, and the opportunities were extremely rare.

Everyone knows clearly that early contact with these top Daniels will have a significant impact on their future academic career.

Because there are too many applicants, it is impossible to come over for an interview. The staff had to strengthen the registration conditions to reduce the number of applicants sharply to less than 50.

Zhang Yuan opened the registration interface and saw that he was able to register because of his hard conditions and test scores.

在 At this time, Professor Wang Zhong sent a video.

"... The old guy has been persuaded by me, and then you have to rely on yourself. If someone is more suitable than you, you can be blamed. No one else. Is there any confidence in choosing one of the fifty masters? "

"Have!"

"That's good, I'll wait for your good news!"

Uh ...

简短 After a short preparation, it was finally the day of the interview.

There are five interview teachers. Two of them are colleagues of their father's past. They are relatively familiar, and all of them have benevolent eyes.

The one sitting in the middle is Professor Ding Zhaodong, and the one on the left is Captain Ma Tao, who is also looking at Zhang Yuan with a kind expression.

"Lady, don't be nervous."

Captain Ma glanced at the material on the table and asked: "You are Lao Zhang's son, we all know it, so there is no need to say more about self-introduction. I have a question, the most you learned from him What is it? "

He was nervous and had enough strength, he was not nervous at all.

远 Zhang Yuan came here casually: "Humble personal character, excellent study habits, unrestrained life style, lofty goals and ideals!"

"stop!"

I saw the professors around him with a slightly weird smile, and Captain Ma asked again, "What are the shortcomings of him, what are the shortcomings you can't tolerate?"

Zhang Yuan thought for a moment, is there any gap between the captain and his father?

Or just want to make a joke to ease the tension and seriousness?

possible.

Zhang Yuan thought for a while and said, "He always demands others with his IQ. I do n’t think ordinary people can tolerate this. Many things he thinks are very simple, so he just orders others to do it, but he thinks it is very simple. Someone else has to do it for a long time, and he may not even be able to do it ... so he always loses his temper somehow. "

Everyone smiled slightly.

Zhang Yuan was a little bit confused about his answer, which is good or not.

The next questioning time for Zhenger Bajing is naturally not that kind of ordinary question.

One of the professors asked straightforwardly: "I have read your robot kinematics paper, which is really a very good article. But, have you considered the problem of constraint calculation for robots with few degrees of freedom?"

"Many industrial robots in reality don't need too many degrees of freedom, and the algorithms are different in this regard ... Do you know anything about 2-RPS-2-SPS four-degree-of-freedom parallel robots? Just say an idea OK, no lengthy talk. "

Zhang Yuan thought about it for a few seconds. In fact, this question is relatively basic: "From the perspective of the complexity of the structure and the production cost of the parallel robot, a completely symmetrical parallel mechanism has great advantages ... The motion branch chain feature matrix is ​​3T1R, 2T // 2R, 2T⊥2R, 1T3R, 3T2R, 2T3R, 3T3R. "

"Let's first discuss the mechanical generators in the form of a single open chain of these 7 kinematic connections ..."

Although told him not to make a long story, he still talked for more than ten minutes.

眯 The professor narrowed his eyes and nodded, "The answer is good."

It's just such a little time, and it is not easy to come up with so much clearly. It shows that Zhang Yuan's basic knowledge is solid, and his thinking is quick and his head is bright.

…… "... Do you have any research on the latest optical chips? Why not make great efforts to develop more powerful quantum chips?"

Zhang Yuan thought for a few seconds and replied: "... Photonic chips are a computing architecture based on photonic circuits, which is equivalent to using countless miniature optical switches on the chip, which acts like logic gates in semiconductor chips ... photons The chip uses a combination of light with different wavelengths, phases, and intensities to perform information processing in an array of complex mirrors, filters, and prism structures. "

"... Like microelectronics, they are all based on silicon-based semiconductor architectures, so they are equivalent to the extension of traditional chips. Its computing power is more than 10,000 times that of ordinary silicon-based chips. Space."

"Although quantum computers can reach 100 million times or even 1 trillion times the silicon-based chip, they must achieve a relevant number of quantum entangled states. 40-50 entangled states are the limit of current technology, and it is difficult to increase them. Very large. But this number of entangled states has less computing power than traditional silicon-based chips ... "

故 “So while www.readwn.com ~ Although the quantum chip is good, but there is no theoretical breakthrough, it is difficult to develop further, so it is not the current mainstream research.”

"Very good, right." The professor nodded slightly. This time not only examined the theoretical basis, but also the breadth of knowledge.

Many professors raised many questions, and Zhang Yuan responded one by one and took it easy.

"I also ask a question." Ding Zhaodong suddenly said.

"Excuse me."

Academician Wu Dingzhaodong slowly said, "What do you think of the industrialized production of the new civilization? What do you think is the biggest factor restricting the development of the new civilization?"

Is the problem so big?

Zhang Yuan cleared his throat and replied: "We do have some good industrial foundations. For example, the spacecraft carries the most advanced lithography machines, some nano-material production rooms, some industrial mother machines, etc. We Able to produce some parts, but many upstream industrial chains are completely disconnected. "

"For example, the most basic chemical raw materials, such as chloroform, caprolactam, and acrylic acid, have only a small amount of stock, and there is no way to produce them. If you use biosynthesis, the cost is too high.

"If you successfully reach the target planet and obtain a lot of material resources, you must start with the most basic raw material development. I think that the biggest factor restricting the development of civilization is actually ... the population. Too small a population causes the entire industrial system to fail. Come."

"I once read a report that the minimum number of people maintaining the earth's industry is 1.6 billion. Although the quality of our population is high enough, the number is only 500,000, which is far from enough."

"It makes sense, in fact, this is also a point we are worried about ..." Before the academician Ding answered, a professor nodded first.