On this day, something big happened suddenly in the spacecraft: Academician Ding of the Wild Wolf Design Bureau made a sound and wanted to recruit a graduate student from undergraduate graduates, which caused a sensation among the entire candidate group!

Academician Ding has always trained doctoral students, but this time he wants to recruit master's degree, and the opportunity is extremely rare.

Everyone knows clearly that getting in touch with these top big guys in advance will have a significant impact on their future academic career.

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

Zhang Yuan opened the registration interface and saw his hard conditions and exam results, and he was able to register. He then breathed a sigh of relief.

At this moment, Professor Wang Zhong sent a video.

"...I have convinced that old guy, and it depends on you next. If there is someone who is more suitable than you and is being competed, no wonder others will be blamed. Do you have confidence to choose one of the fifty masters?"

"have!"

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

...

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

There were five interview teachers, two of whom were their father’s former colleagues. They were quite familiar with each other and all looked kind.

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

"Young man, don't be nervous."

Captain Ma glanced at the materials on the table and asked first: "You are Lao Zhang's son. We all know about it, so there is no need to say more about introducing yourself. I have a question. What is the point you learned the most from him?"

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

Zhang Yuan casually said: "Highly personal morality, excellent study habits, lifestyle that is not limited to external objects, and lofty goals and ideals!"

"stop!"

Seeing the professor around him showing a slightly strange smile, Captain Ma asked again: "Just tell me what his shortcomings are. What shortcomings are you intolerant?"

Zhang Yuan was stunned. Could it be that the captain had any old gap with his father?

Or, just want to make a joke and ease the tense and serious atmosphere?

It's possible.

Zhang Yuan thought for a while and said, "He always demands others with his IQ. I think it is difficult for ordinary people to tolerate this. He thinks many things are very simple, so he casually asks others to do it, but others have to do something very simple for a long time, and it may not even be able to do it... So he always loses his temper for no reason."

Everyone smiled slightly.

Zhang Yuan was a little confused about his answer, whether it was good or bad.

Next is the serious questioning time, so naturally it will not be that kind of ordinary question.

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

"Many industrial robots in reality do not require too much freedom, and the algorithms in this regard are also different... Do you know anything about 2-rps-2-sps four-degree-of-freedom parallel robots? Just say one idea, and you don't need to have a long discussion."

Zhang Yuan thought for a few seconds, but in fact, this question is quite basic: "In terms of structural complexity and production cost, the fully symmetric parallel mechanism has great advantages... The motion branching characteristic matrix of four degrees of freedom movement is 3t1r, 2t2r, 2t⊥2r, 1t3r, 3t2r, 2t3r, 3t3r."

"We first discuss the mechanical generators in the single open chain form of motion connections in these 7..."

Although he was told not to talk about it in a long way, he still talked for more than ten minutes.

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

It’s not easy to think so much clearly in such a little time, which shows that Zhang Yuan’s basic knowledge is very solid, his thinking is quick and his mind is brilliant.

"...Do you have any research on the latest optical chips? Why don't you vigorously develop quantum chips with stronger computing power?"

Zhang Yuan thought for a few seconds and replied: "...Photonic chips are a computing architecture based on photon loops, which is equivalent to using countless micro optical switches on the chip, and their function is similar to the logic gate in a semiconductor chip...Photonic chips use light combinations of different wavelengths, phases and intensity to process information in an array composed of complex reflectors, filters and prism structures."

"... Like microelectronics, they are semiconductor architectures based on silicon materials, 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, and with current technology, there is still room for upward development."

"Although the computing power of quantum computers can reach 100 million times, or even one trillion times that of silicon-based chips, it is necessary to achieve a relevant number of quantum entangled states. 40-50 entangled states are the limit of current technology, and it is very difficult to improve upwards. However, the computing power of this number of entangled states is not as good as that of traditional silicon-based chips..."

"So, although quantum chips are good, they do not have major theoretical breakthroughs, so they are difficult to develop upward, so they are not the mainstream research at present."

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

Many professors asked a lot of questions, and Zhang Yuan responded one by one and was calm and contented.

"I'll ask a question too." Ding Zhaodong suddenly spoke.

"Would you like."

Academician Ding Zhaodong said slowly: "What do you think about the industrialized production of new civilizations? What do you think is the biggest factor restricting the development of new civilizations?"

Is there such a big problem?

Zhang Yuan cleared his throat and replied: "We do have some good industrial foundations, such as the spacecraft carrying the most advanced lithography machines, some nanomaterial production rooms, and some industrial master machines. We can produce some parts, but many upstream industrial chains are completely out of touch."

"For example, trichloromethane, caprolactam, and acrylic acid are the most basic chemical raw materials, and they are only in small amounts of stock, and they cannot be produced after they are used up. If biosynthesis is used, the cost will be too high."

"If you successfully arrive at the target planet and obtain a large amount of material resources, you have to start with the most basic raw material development. I think the biggest factor restricting the development of civilization is actually... the population. Too small population will lead to the failure of the entire industrial system to grow."

"I once read a report that the population that maintains the smallest industry on the earth is 1.6 billion. Although our population quality is high enough, the number is only 500,000, which is far from enough."
Chapter completed!