Wandering Spaceship in Deep Space Chapter 71: Interview

　　 On this day, a major event suddenly happened in the spacecraft: Academician Ding of the Wild Wolf Design Bureau released his voice and wanted to recruit a graduate student among the undergraduate graduates. As a result, it caused a sensation among the entire group of candidates!

Academician 　　Ding has always cultivated doctors, but this time he wanted to recruit masters, which was a rare opportunity.

　　Everyone clearly knows that contacting these top-level experts in advance will have a significant impact on their future academic career.

　　 Because of the large number of applicants, it is impossible to come over 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, he was still able to sign up, and he breathed a sigh of relief.

　　 At this moment, Professor Wang Zhong sent a video.

　　"...The old guy has been persuaded by me, and then you have to rely on yourself. If there is someone who is more suitable than you and is being competed, no one can blame others. Fifty masters choose one person, there is Confidence?"

　　 "Yes!"

　　 "That's good, I am waiting for your good news!"

　　……

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

　　 There are five interviewing teachers. 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 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 Lao Zhang’s son, we all know, so I don’t need to introduce myself. I have a question. You learn from him. What is the most important point?"

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

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

　　 "Stop!"

　　 Seeing a slightly weird smile from the surrounding professors, Captain Ma asked again: "Just tell me 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?

　　 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 he thinks Very simple things, others have to do for a long time, and may not even be able to make...so he always loses his temper inexplicably."

　　 Everyone smiled slightly.

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

　　 Next is the question time for serious questions. 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 constraint calculation of robots with less degrees of freedom?"

　　"Many industrial robots in reality do not need too much freedom, and the algorithms in this respect are also different...Do you have any idea about the 2-RPS-2-SPS four-degree-of-freedom parallel robot? Just say Just one idea, no need for a long story."

　　 Zhang Yuan thought about it for a few seconds. In fact, this question is quite basic: "From the perspective of the complexity of the structure and the cost of production, the fully symmetrical parallel mechanism has great advantages...Four freedoms The characteristic matrix of motion branch chain of degree motion 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 the seven kinematic connections..."

　　Although he asked him not to talk about it, he still talked for more than ten minutes.

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

　　 It’s just such a little time, it’s not easy to think of so many clearly, which shows that Zhang Yuan’s basic knowledge is very solid, 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 capabilities?"

　　Zhang Yuan thought for a few seconds, and replied: "...The photonic chip is a computational framework based on the photonic circuit, which is equivalent to using countless micro optical switches on the chip, which acts like a logic gate in a semiconductor chip. ...The photonic chip uses light combinations of different wavelengths, phases and intensities to process information in an array of complex mirrors, filters, and prism structures."

　　"...Like microelectronics, it is a semiconductor architecture based on silicon materials, so it is equivalent to an 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 room for upward development."

　　"Although quantum computers can reach 100 million times or even 1 trillion times the computing power of silicon-based chips, they must achieve a relevant number of quantum entangled states. 40-50 entangled states are the limit of current technology. It is very difficult to upgrade. But with this number of entangled states, the computing power is not as good as traditional silicon-based chips..."

　　"So ~IndoMTL.com~ quantum chips are good, but there is no major breakthrough in theory, and it is difficult to advance further, so it is not the current research mainstream."

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

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

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

　　 "May I ask."

　　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 spacecraft carries the most advanced photolithography machines, some nano-material production rooms, and some industrial mother machines, etc. 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, there are only a small amount of inventory, and there is no way to produce them when they are used up. 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 have to start with the development of the most basic raw materials. I think the biggest factor restricting the development of civilization is actually...population. Too small population leads to the entire industry. The system can't get up."

　　 "I once read a report that the population that maintains the smallest number of earth industries is 1.6 billion. Although our population is high enough, the number is only 500,000, which is far from enough."

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