Rebirth of the Tech Frenzy

Chapter 40 : Old Professor

On the way, Xiang Qianjin was suffering. If this were to let Lin Kexin and Liu Ruoxin know, they would not know what would happen to them? Fortunately, not far away, Xiang Qianjin took Zhou Yuhan to the University of Engineering Science and Technology, and into the yard of the University of Engineering Science and Technology. Xiang Qianjin found that there were not too many people here. It should be the reason for the class. Although the University of Engineering and the University of Science and Technology are only one word difference, in fact their full names are completely different. Xiang Qianjin belongs to the University of Science and Technology, while Zhou Yuhan belongs to the University of Industry Science and Technology. Although there is an additional industry, the professional direction has a strong directivity.

Xiang Qianjin followed Zhou Yuhan. He came to the library cautiously. There were not many people in front of the library. After Xiang Qianjin and Zhou Yuhan entered the library, Zhou Yuhan found a seat and said with a smile: ” You get the book first, and I will help you occupy a seat.”

Xiang Qianjin nodded, he walked to the bookshelf and saw a dazzling array of books, from which he selected some books with very high experience value. These books are marked, and it is indeed the library of the University of Science and Technology. There are indeed many professional books in it, and the update speed is indeed faster than the outside. The latest magazines and some scientific papers published abroad are all clear at a glance!

Xiang Qianjin took a lot of papers and materials and put them on the table. Zhou Yuhan asked in surprise, “What are you doing? Do you read books?”

Xiang Qianjin replied helplessly: “Yes, otherwise, what should I do? Now I can only cast the net and fish more, there is no way!”

Zhou Yuhan smiled and gave a thumbs up. Then she went out and took three books back. Compared with Xiang Qianjin’s pile of foreign materials, these three books were much thinner. Xiang Qianjin looked at these things as scanning, because After you see it, you will synchronize with the system. There are these things in the system’s database, but you need to synchronize the data, that is, to grasp the current level of human technology. The ultimate reward is the progress of technology, as long as there is enough A few steps, you can get more technology points.

As soon as he read the book, Xiang Qianjin began to enter a state of selflessness. This accumulation of experience is very enjoyable for Xiang Qianjin. With a beautiful woman sitting next to him, Xiang Qianjin was so still, like an old monk, seriously sailing in the ocean of scientific knowledge. How many people envy him?

Zhou Yuhan is a school girl! She is well-known in the school, but in comparison, Xiang Qianjin is too enviable. Xiang Qianjin is not ugly. The reason why Meng Yang feels the sense of crisis is that the young man Xiang Qianjin is still good-looking. , But he didn’t even mean to look at the school flowers around him? This is too arrogant, right? In other words, does he deserve to be single?

Zhou Yuhan found that Xiang Qianjin was super serious when she was reading, which made her follow. After scanning the data, Xiang Qianjin collects the data, and then continues scanning. When Xiang Qianjin took back a large pile of materials, he found two girls sitting opposite him. The two girls looked at Xiang Qiang with a grin, and then stretched out their white tender hands to greet Xiang Qiang. Xiang Qianjin didn’t know them. , But he nodded politely when he saw people beckoning. Then they put the materials on the table and saw the thick materials. The girls looked at Xiang Qianjin in surprise and said, “What are you doing? Do you read books?”

Xiang Qianjin smiled slyly, then nodded. Zhou Yuhan couldn’t help laughing, she whispered: “This is an expert, what do you know?”

“Cousin, where did you meet the expert? How amazing? The expert is so amazing, do me a favor?”

Xiang Qianjin looked suspiciously at the little girl opposite, looking at him as if he was under twenty years old. Xiang Qianjin asked curiously: “What’s the matter?”

“That’s it. I am in electronic communication. We recently had a 3G outlook course, saying that it is a 3G outlook for the future. Do you have any ideas?”

“It is difficult for GSM to survive under 3G, because their communication architecture model is destined to be unsuitable for him. So in terms of prospects and development, I suggest you start with CDMA. CDMA is a multi-channel method called multiple code divisions. Addressing means that multiple signals occupy only one channel, which greatly increases the bandwidth utilization rate, which is much better than GSM, and GSM is time division multiple access, which changes time into one frame by frame, like an animation. Then divide each frame into many time slots and assign them to each base station. In the final analysis, I will make an analogy. The operation of GSM is somewhat similar to that of a train, and it can only travel by one at the same time. There are several passages, so that you can pass cars in different passages during this time period. However, you can only take one train.” Xiang Qianjin drew a few horizontal lines in his notebook as he spoke. Then, a little train was drawn on it. He gave a metaphor for his image. The little girl nodded happily and said, “You speak of a good image!”

Xiang Qianjin then drew a horizontal line, and then drew a train on it and said: “CDMA is different. It is our imagination. Trains are different parallel worlds. Although they overlap, they are different from each other. Interference. This is the concept of code division multiple access. Multiple different codes can be used to transmit messages in the same channel at the same time without interfering with each other. This is very suitable for the future development of 3G technology, because from our point of view, If 2G is a short message, then the 3G revolution is mostly the era of the Internet connected to the mobile terminal. We can provide a mobile terminal to surf the Internet.” At this point, Xiang Qianjin tore a piece of paper from the back, then folded it in half, and placed it on two layers of paper. Draw a small train each. Stacked together!

Xiang Qianjin smiled and handed it to the little girl.

The little girl patted her white tender hand and smiled: “It’s so amazing, you! It’s the key point all at once! Master, are you a professor?”

“Me? I’m just a very ordinary student. I’m from HKUST” Xiang Qianjin said with a peaceful smile. When he was talking and laughing, suddenly an old man walked over with his hands behind his back and said, “What are you talking about? So happy? I don’t know how to keep quiet in the library? By the way, Yuhan! Do you have ideas for your subject?”

Xiang Qianjin was taken aback for a moment. An old man walked over. He was wearing a light blue short-sleeved shirt. The old man looked at Xiang Qiang for a while and did not recognize him. Zhou Yuhan smiled and said, “Professor Cheng, I… I’m looking for it, but I already have a direction. I still intend to research lithium batteries specifically, and a new direction is lithium-ion batteries.”

This old professor Xiang Qianjin knew him, and he was also a great man, one of the pillars of China’s science and technology industry. His main research direction is hydrogen power battery. His research and development is very good!

The old professor looked at Zhou Yuhan with a smile, he seemed to be a little interested in this battery. The old man said with a kind smile on his face: “Lithium-ion battery? It’s really good, but there are not many people tracking technology in China. Your subject is not very good, and the materials are not easy to find, and the domestic research and development process. It has not yet reached this level. I personally recommend that you put more effort into the future development of hydrogen batteries.”

Xiang Qianjin knew that the opportunity was here! This is a chance to talk! To seize the opportunity is to seize the road to success! The best way to talk is to start from the other person’s point of interest! Xiang Qianjin smiled and said at this time: “Hydrogen battery? This is a solution for large equipment, but the solution for preparing hydrogen can only stay in the direction of electrolysis of water, and the exchange ratio of using electricity for hydrogen is still not good. . Moreover, the temporary technical conditions for its development are far less likely than the possibility of mass production of lithium batteries. If the level of manufacturing is greatly improved, hydrogen batteries may be improved, so I personally recommend lithium-ion batteries. After all, it is possible. The most direct thing that will change our lives in the short term is the electronic technology developed by mobile phones. The information revolution has already foreshadowed this. In terms of the direction, I recommend developing towards the field of small and medium-sized batteries carried by individuals. is very important.”