When sorting out the notes for this class after class, Shen Yiyi found that the teacher who was in the class was really very informative.

The so-called material refers to Shen Yiyi's discovery that the notes made according to the content of the teacher's lecture are more in-depth and simple than the content in the textbook, and can make people feel the same. This point is very important in Shen Yiyi's view.

For a long time, perhaps due to the inheritance of knowledge, teachers in China have often been in the same mode when lecturing. They are accustomed to reading the content of the class according to the textbook, basically repeating the content of the textbook to you in the form of dictation. However, for students, if a person with a low level of dyslexia has dyslexia, of course, the teacher will talk about it again to help them learn and absorb. For a key university like Tsinghua University, students are all outstanding from all over the world, so naturally there will be no dyslexia. In this case, students can read and understand the knowledge in the textbook by themselves through self-study, and you still need to repeat what your teacher is doing. Although repetition is a way to help with memorization, it is indeed a bit of a waste of time for gifted students to just repeat the content of the textbook.

And the content of this teacher's lecture in class is different from the content in the book, and in Shen Yiyi's opinion, it is obvious that he has prepared the class before. At this point, Shen Yiyi thinks that this hard-working teacher should be given a thumbs up. Of course, more importantly, Shen Yiyi believes that as a gifted student who also graduated from Tsinghua University and then returned to the school after going abroad for further study, the teacher must have prepared his own feelings about this course when he was studying in the course into the course. Because Shen Yiyi found that the teacher's teaching content was indeed tailor-made for the students in his class.

Another reason why Shen Yiyi thinks this teacher is good is that her eldest lady herself hates that some young teachers are fashionable and make slides. Although after two years, after having a computer, this slide will be upgraded to PPT. But Shen Yiyi just likes traditional board books. Shen Yiyi understands that many teachers may consider that their personal handwriting is not standard, which hinders the reading and learning of students, so they will print out the content of their lectures. It is copied onto a plastic film and then projected onto the blackboard via a projector. In this way, everyone can see a more standard text, which can be described as a kind of packaging of the lecture content. But Shen Yiyi thinks that the results of such lectures are actually not good.

Because she always believes that there is a rhythm problem in learning. When most people come into contact with a new theory, they may not be able to absorb their own knowledge without any barriers. The time for those fragments to think is also very necessary. The current Slide or the future PPT often puts the knowledge points on the curtain at once, and it just does not give the audience or the audience the necessary time to think. It also affects the rhythm of digestion and absorption. And at this point, the traditional board book does a great job. Because the words on the blackboard are written stroke by stroke. This takes time, and often in the process of writing, teachers will also pay attention to expressing some of their ideas in words by the way. In this way, whether it is a board book or the teacher's words, it can help students understand and master the knowledge points that they want to teach in class. It's actually a good tradition to take classes. But there are very few young teachers who are willing to pass it on. Shen Yiyi thinks that the main reason is not that he keeps pace with the times in teaching. Instead, new teachers will choose a lazy way of teaching.

With such a concept, it is natural for Shen Yiyi to have a good impression of this young returnee teacher who is not lazy in class.

Since Shen Yiyi is very interested in this teacher, it is natural that Shen Yiyi will think about whether he can join him in several projects that he is currently anxious about.

Speaking of Shen Yiyi's current key scientific research projects, they can be roughly divided into two categories. These two categories are the two categories that China traditionally separates engineering majors, namely mechanical and electrical.

Machine refers to machinery. Basically, this kind of machinery is a part of the power engine that has been handed down from history to the power engine that emerged from the steam engine revolution. Research in this area. If you want to be able to be seen by Shen Yiyi one by one, it is generally material science. Because materials science has indeed profoundly influenced the development of mechanics. A variety of structures that are mechanically designed to fulfill various functions. In the end, it must be built on a material that can withstand the operating conditions of such machinery. Of course, advanced materials science in modern industrial systems is often associated with aeronautics or power. For example, if Shen Yiyi wants to build an airplane, that is, he must use lighter and stronger carbon fiber materials to fly farther and fly higher. Another example is the engine that propels an aircraft, because the conversion of heat and mechanical energy strictly follows Carnot's law, the higher the combustion temperature of the fuel, the more mechanical energy will be output in the future. The pre-turbine temperature of the most advanced aero engines can reach 2000 K, which is more than 1700 degrees Celsius. At this temperature, most of the metal has melted. It can be seen how high the research level of materials science is.

Then there's the electricity part. From Edison's direct current power generation technology to Tesla's alternating current power generation technology, human civilization has been continuously accelerated because of the development of electricity. Mankind has never found such a long-dreamed job as a machine to replace man with such a speed of transmission and high taste of energy before this. Thanks to electricity, people no longer have to think about what kind of energy they use when building factories. Because electricity can help humans to start machines wherever they need them. It can be said that with electricity, large-scale mechanized mass production is possible.

Electricity is further divided into strong and weak electricity. The former actually refers to the transmission and distribution of power plants. That is, those applications of electricity at voltage levels that can cause harm to human life. Shen Yiyi's current research direction is obviously not this. Shen Yiyi is actually concerned about the weak current part, which is commonly known as electronic technology. Specifically, at present, Shen Yiyi has invested a lot of money in chip technology. Think about it in the 21st century, China imports more chips every year than the country imports oil every year. It is conceivable how important chip technology is to the development of the entire national economy.

Shen Yiyi's research layout, of course, is not necessarily from the perspective of whether the country needs it. Her eldest lady is rich and capricious, so when it comes to allocating research resources. One is from one's own interests, and the other is from supporting the research and development of products that one is optimistic about.

Don't look at Shen Yiyi's current cash cow is actually the self-propelled balance bike that she and Zhu Yiwa's Morgan consortium cooperate, but Shen Yiyi's interest in this kind of product that is actually easy to imitate is not very high. Although because of the joining of the Morgan consortium, through the complex patent protection of the design, Shen Yiyi can guarantee the investment income locked in for a long period of time, but for an engineer with a technical soul. This kind of product with less creativity is also gradually less attractive to itself. Therefore, Shen Yiyi actually has his own medium and long-term scientific research plan for a long time.

Speaking of the longest-term scientific research plan, that is, Shen Yiyi occasionally had a whim at that time, but he was always led by Mr. Xiao and Mr. An to blame Shen Yiyi's drone project. So a lot of things are a flash of inspiration. However, for engineers, how to realize a conceptual thing and really be able to manufacture it at a relatively low cost is quite a test of the engineer's skills. For Shen Yiyi at that time, the project was temporarily shelved. It is indeed a last resort. There are a lot of key components in this. At that time, they didn't have the conditions for production.

None of the key parts of the drone's engine, sensors, controllers, combinators, radars, and absorbing materials do not need to be redeveloped. And the research and development of each of these components was tantamount to a new big topic for China's scientific and technological level at that time. In this case, limited by funds and resources, Shen Yiyi put this project aside for the time being, which is the right choice.

Of course. To say that the project is put on hold does not mean that nothing will be done during this time. Opposite. In fact, Shen Yiyi has been laying out since he entered the university.

In view of the limited state funding for scientific research, Shen Yiyi's private funding has effectively compensated for the damage caused by the lack of national scientific research investment for materials science research that cannot produce immediate results due to the long period of effect. In the past three years, with her continuous infusion of funds, it can be said that the projects she is concerned about have initially formed a unique process route with their own characteristics. Especially in high-purity silicon wafers, high-temperature alloys and non-metallic high-strength materials, Shen Yiyi has achieved satisfactory results. Shen Yiyi assessed that the current level of these three materials and the world's top materials has been shortened from decades to seven or eight years. Don't look at the gap there is still a gap, but considering that the most advanced materials in foreign countries generally will not be immediately applied, in fact, as long as we apply our latest materials immediately, in fact, it can be said that we are standing on the same level of application as foreign countries. And this is enough for Shen Yiyi.

After thinking about it, Shen Yiyi has actually made a decision on the engine part of the drone. As soon as the Japanese HONDA miniature engine arrived, she began to look for someone to reverse the engine. Or it's not reversed, it's called dismantling and learning. Anyway, this military drone will not be exported in the future, and Shen Yiyi is not afraid of any patent protection. Anyone who is obsessed with intellectual property rights and the like in military science and technology must have a sick head. Anyway, Shen Yiyi believes that with the superalloy technology in his current hands, it should not be much worse than Honda. Therefore, there should be no technical difficulty in the reproduction of this engine.

In terms of controllers, Shen Yiyi has already laid out and developed the "Chinese core" of this era. She was the first to invite her teacher, Zhang Cheng, to be the project leader of the CPU development team. At the same time, the first advanced lithography machine with the Institute of Optics and Mechanics of the Chinese Academy of Sciences, coupled with the high-purity silicon wafer technology that has made breakthroughs, has laid the foundation for the manufacture of advanced CPUs in the process. By the time Zhang Cheng's team has given the design of the CPU, it should soon be able to produce samples for testing. At that time, it will be possible to improve reliable components in a very short time.

Of course, controllers and combinators can be considered to be the same thing. Because although the combinator emphasizes computing power, it can be regarded as a pure weak current. The controller needs to control some mechanical systems, and there are some technical hurdles of power components that need to be overcome. Shen Yiyi is already considering whether to set up another telex control team to cooperate with the research on control mechanisms and control rates.

In this way, three of the six key areas have been solved, and the remaining three Shen Yiyi are also thinking about how to make up for the shortcomings that they were not able to distract before. In other words, for the next period of time, she will still have to focus a little on the research that includes sensors, radar and absorbing materials.

For the two things of radar and wave-absorbing paint, because the military use is too obvious, Shen Yiyi is not ready to do it himself. Although there is a big gap between the domestic technical level and foreign countries, there are still special research institutions in China that have been engaged in research in this area. Moreover, after the current leadership took office, he also attached more importance to the research and investment in cutting-edge military science and technology. Therefore, Shen Yiyi felt that it might be better to hand over these two things to a professional research institution for research. As for the coordination of the relationship, with the old man Xiao and the old man An behind him, plus a powerful person like his grandfather, Shen Yiyi believes that he can still coordinate with a better research unit.

Now it's the sensor thing that needs to be added. Speaking of Chinese sensors and foreign sensors, the gap in performance is relatively large. Whether it is precision and reliability, it is a cut short of foreign products. Even the sensors on some military equipment have to rely on imported so-called civilian products. Fortunately, through his previous research on his own small topic, Shen Yiyi can be regarded as discovering a process route with his own technical characteristics. She believes that with that kind of thinking, the sensors needed on the drone should not be a problem.

And the research topic she wants to give to this returnee teacher is to adopt the sensor element of her own research route. (To be continued.) )