Deep Space Planet Leader

On this day, a major event suddenly occurred in spaceship: Academician Ding of the Wild Wolf Design Bureau released his voice and wanted to recruit a graduate student among the undergraduates, which triggered The whole group of candidates is a sensation!

Academician Ding has always cultivated academicians, but this time he wants to recruit a master's degree, which is a rare opportunity.

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

Because there are too many applicants, it is impossible to come here for an interview. The staff had to strengthen the hard conditions for registration, and the number of applicants was drastically reduced to less than fifty.

Zhang Yuan opened the registration interface and saw his hard conditions and test results, and he was still able to sign up. This was only slightly sighed in relief.

At this time, Professor Wang Zhong sent a video.

"...The Old Guy has been persuaded by me, the next step is to rely on yourself. If there is someone who is more suitable than you and is being competed, no one can blame others. Among the fifty experts Choose someone, are you confident?"

"Yes!"

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

……

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

There are a total of five teachers for interviews. Two of them are colleagues who were former colleagues of his father.

The one sitting in the middle is Professor Ding Zhaodong, and the one on the far left is Captain Ma Tao, who also looks at Zhang Yuan kindly.

"Young man, don't be nervous."

Captain Ma glanced at the materials on the table, and first asked: "You are Old Zhang's son, we all know. There is no need to introduce myself. I have a question, what do you learn the most from him?"

He is nervous, with enough strength, he is not nervous at all.

Zhang Yuan came casually: "Humble personal character, excellent study habits, life style not limited to foreign objects, lofty goals and ideals!"

"Stop!"

Seeing the slightly weird smiles of the surrounding professors, Captain Ma asked again: "Just talk about his shortcomings. What shortcomings are you intolerable?"

Zhang Yuan was taken aback. Is there any old gap between this captain and his father?

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

It is possible.

Zhang Yuan thought for a while and said, "He always asks others with his IQ. I find it hard for ordinary people to tolerate this. He finds many things very simple, so he just asks others to do it. , But what he thinks is very simple, but others have to do it for a long time, and may not even be able to do it...So he always loses his temper with unfathomable mystery."

Everyone smiled slightly.

Zhang Yuan is a little bit confused about his answer, whether it is good or not.

The next time is the question time for the eight classics, and naturally it will not be that kind of ordinary question.

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

"Many industrial robots in reality do not need too much degree of freedom, and the algorithms in this respect are also different...For 2-RPS-2-SPS four-degree-of-freedom parallel robots, Do you have any idea? Just say an idea, no need to talk about it."

Zhang Yuan thought about it for a few seconds. In fact, this question is fairly basic: "Parallel robots have a complex structure. In terms of degree and production cost, the fully symmetrical parallel mechanism has great advantages...The characteristic matrix of the four-degree-of-freedom motion branch chain is 3T1R, 2T2R, 2T⊥2R, 1T3R, 3T2R, 2T3R, 3T3R."

"Let’s first discuss the mechanical generators of the single-open chain form of the seven kinematic connections..."

Although he didn’t want to talk about it, he still talked about it for more than ten minutes.

The professor squinted his eyes, nodded and said: "The answer is good."

It's not easy to think of so much in just such a little time. , Which shows that Zhang Yuan's basic knowledge is very solid, and his thinking is quick and his head is bright.

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

Zhang Yuan thought for a few seconds, replied: "...The photonic chip is a computing architecture based on the photonic circuit. Equivalent to uses countless micro-optical switches on the chip, which are similar to the logic grid in a semiconductor chip... The photonic chip uses light combinations of different wavelengths, phases and intensities. , Information processing is carried out in an array composed of complex mirrors, filters and prism structures."

"...Like microelectronics, they are all based on the Semiconductor architecture of silicon materials, so they are equivalent to traditional The extension of the chip. Its computing power is more than 10,000 times that of ordinary silicon-based chips, and with the current technology, there is still room for upward development."

"Although quantum computers can reach silicon-based computing power One hundred million times or even one trillion times the base chip, but a relevant number of quantum entangled states must be realized. 40-50 entangled states are the limit of the current technology, and it is very difficult to upgrade. But this number of entangled states, The computing power is not as good as traditional silicon-based chips..."

"Therefore, although quantum chips are good, they do not have a great theoretical breakthrough, and it is difficult to advance further, so it is not the current research mainstream."

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

Many professors asked a lot of questions, Zhang Yuan one after another responded, calmly and contentedly.

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

"Excuse me."

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

Is it such a big problem?

Zhang Yuan cleared his throat and replied: "We do have some good industrial foundations. For example, the spaceship carries the most advanced lithography machine, some nanomaterial production rooms, and Some industrial mother machines, etc. We can 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, only a small amount If the inventory is used up, there is no way to produce it. If biosynthesis is used, the cost is too high."

"If you successfully reach the target planet and obtain a large amount of material resources, you must start with the development of the most basic raw materials. Start. I think that the biggest factor restricting the development of civilization is actually...population. Too small population makes the entire industrial system unable to rise."

"I once read a report that maintained the Earth industry. The minimum population is 1.6 billion. Although our population quality is high enough, the number is only half a million, which is far from insufficient."

"It makes sense. In fact, this is one of our concerns..." Before Academician Ding could reply, a professor took the lead in nodded.