Chapter 51 Brother Pang, please don’t misunderstand me! (Please read on!) To be precise, what Poincare gave Lu Shan was not a paper, but more of a study on the problems he had discovered and the corresponding solutions he had provided. Moreover, Poincaré was very fond of using mathematical logic and algorithms to solve problems. For example, in the last few pages of his draft paper, he used mathematical algorithms to calculate the optimal layout of communication base stations. In the paper, he proposed a basic method of using wireless link analysis and estimating the coverage radius of densely populated areas. He also calculated different service rates, user movement speeds and wireless channel environments, which ultimately resulted in different maximum allowable losses for the spatial link. Poincare even gave genetic algorithm optimization and detailed calculation formulas. Mathematics is not omnipotent, but it can solve many problems. For telecommunications companies, the cost of building a 3G base station is approximately 50 to 80 yuan, which includes the cost of the equipment. Third-tier cities with a population of more than 50 people need hundreds of 3G base stations to ensure smooth network operation. Second-tier and higher cities with larger populations may even need thousands or even tens of thousands of base stations.
The maintenance of base stations is also a considerable expense. Therefore, every communications company is trying every possible way to cover more users and a larger area with the least number of base stations. This involves mathematical problems in communication. This draft is very practical no matter in the 2G or 3G era! If Lu Shan remembered correctly, Xia Country only started using 08G technology in 3. The first batch of 1G technology was the castrated version of TD-CDMA purchased by China Mobile from abroad. Later, the WCDMA standard purchased by China Unicom gradually entered the market. A large amount of 3D technology is in the hands of Siemens, Samsung, Nokia, Ericsson, NEC and Qualcomm, while domestic companies such as Huawei and ZTE have very few expertise in this field. There are many patented technologies in the field of 3G communications. If you want to use 3G communications, you need to obtain the right to use important patents. In the communications sector, different companies use a system of granting each other patented technologies. That is to say, if you own a certain technical patent in the field of 3G communications, you can grant this technical right to another company and obtain other patented technologies of this company at the same time. Of course, it is not enough to just own a patent in the 3G communications field; you must also obtain international (Western) recognition. This means that the more patented technologies you have in the field, the more say you have. Otherwise, you can only purchase them by spending money or even paying other costs. Xia State does not have an advantage in 3G communication technology and has suffered a lot in this regard. At the beginning, Datang spent a huge amount of money to purchase the TD-SCDMA that was eliminated by Siemens on a whim. Later, China Mobile spent another 2000 billion to develop TD-SCDMA. As a result, this technology was almost only used by Xia country, and it was almost not recognized internationally. This was because although TD-SCDMA was called 3G, its theoretical download speed was only , while the download speed of WCDMA could reach 21M/s. Xia Guo Mobile became "Xia Guo Cannot Move". Whether it is 3G or 4G, the most important foundation of communication technology is mathematics. Since Poincare was interested in modern communication technology during this period, Lu Shan suddenly had some ideas. As long as you stand at the forefront of the times, pigs can also fly to the sky. In some application trends, doing some academic research with strong applicability should result in more academic and technological points.
For example, if you write a paper that uses mathematical models to restore ancient weather, I'm afraid few people will read it. But if you write an article that uses mathematical algorithms to calculate 100% chance of winning the -Star Lottery and the Super Lotto. It will definitely become a hit. Lu Shan silently said: "Student Xiao Pang, 3G communication is the way to go!" If Poincare had been born in this era, he would probably have to add a great radio communications expert to his series of titles such as great mathematician and astrophysicist. Poincare felt a little uneasy when he saw Lu Shan staring at him and licking his tongue. After all, there were only two men in the Singularity Lab, and they lived together day and night. "Lu Shan, I am wearing too thin clothes. Can you bring me a thick cotton coat next time you come?" Lu Shan was stunned: You are a heroic spirit, you don’t feel cold or hot, and you don’t feel hungry, so why do you wear a woolen coat? Later, Lu Shan saw Poincare's trembling expression and knew that the old man had misunderstood. Lu Shan coughed lightly and said, "There is a lot of information available online now. I will teach you now." Poincare: "You can teach from a distance. I should be able to hear you." Lu Shan: ... Smart people are smart in every era. It took Lu Shan a short time to teach Poincare how to use a computer. Now that Poincare began to study computers, Lu Shan had some free time to continue studying relevant university courses with high quality. He did not leave the Singularity Laboratory until his energy was completely exhausted, taking Poincare's draft paper with him. This time, Lu Shan brought out two pieces of draft paper. One is the "topological problems of three-dimensional and higher manifolds" which has not been fully sorted out, and the other is Poincare's thoughts and mathematical optimization in the field of communications. A week later, Lu Shan took the books to Jiangzhou University Library to return them and also prepared to borrow some more books. After staying up all night for several nights, Qiao Weiwei, Ma Lijuan and Li Jie once again went to see Chen Qiyi, begging for approval of their thesis. Chen Qiyi originally supervised doctoral students in previous classes. After becoming the dean of the Faculty of Science two years ago, Chen Qiyi shifted much of his work focus to the administrative management of the Faculty of Science, and spent less energy on teaching and scientific research. The school took this into consideration and asked Chen Qiyi to come down and supervise the master's students, which would make things easier for them. This kind of day is not what Chen Qiyi likes. But there is no way. Human beings are social animals, and especially in the environment of Xiaguo’s universities, it is almost impossible for you to conduct research seriously and without paying attention to worldly affairs. By then, I’m afraid there won’t even be any scientific research resources left, let alone conducting research. As the end of the semester and the Spring Festival approached, there were a lot of things to do in the School of Science, and Chen Qiyi became even more irritable. Ma Lijuan poked Qiao Weiwei and pointed at Chen Qiyi's head with her eyes, meaning that Chen Qiyi was becoming even more "bald". "Have you revised your papers? If I find any stupid mistakes this time, I will give you a failing grade."
These words were intimidating and infuriating, and everyone couldn't help swallowing. Then you poked me and I poked you, and neither of us dared to be the first to submit the paper. Chen Qiyi was speechless. "What are you doing? There's a fire pit in front of me! Are you waiting for the other party to jump down?" "Li Jie, you poked left and right. It seems that you are confident about your thesis! Okay, you do it!" Li Jie: “Uh?” Chen Qiyi: "Why are you hungry? It's not time for lunch yet, hurry up and bring the paper over!" Please read on! Read on! Read on! (End of this chapter)